./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext/dll_extends_pointer.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_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/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_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/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_6c71f353-e96b-4480-a62f-6b4baa054348/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 b19ed65fc9d9f8e19f4d644b05d37e3da28cb107a90eedb15c652c094a7f23f1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:41:59,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:41:59,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:41:59,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:41:59,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:41:59,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:41:59,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:41:59,851 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:41:59,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:41:59,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:41:59,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:41:59,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:41:59,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:41:59,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:41:59,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:41:59,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:41:59,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:41:59,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:41:59,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:41:59,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:41:59,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:41:59,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:41:59,887 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:41:59,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:41:59,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:41:59,897 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:41:59,898 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:41:59,899 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:41:59,900 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:41:59,901 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:41:59,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:41:59,903 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:41:59,905 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:41:59,906 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:41:59,907 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:41:59,907 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:41:59,908 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:41:59,908 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:41:59,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:41:59,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:41:59,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:41:59,911 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-09 10:41:59,941 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:41:59,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:41:59,942 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:41:59,942 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:41:59,949 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:41:59,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:41:59,950 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:41:59,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:41:59,950 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:41:59,951 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 10:41:59,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:41:59,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:41:59,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:41:59,952 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 10:41:59,952 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 10:41:59,952 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 10:41:59,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:41:59,953 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 10:41:59,953 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:41:59,953 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:41:59,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:41:59,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:41:59,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:41:59,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:41:59,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:41:59,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:41:59,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:41:59,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:41:59,955 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:41:59,956 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_6c71f353-e96b-4480-a62f-6b4baa054348/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b19ed65fc9d9f8e19f4d644b05d37e3da28cb107a90eedb15c652c094a7f23f1 [2021-11-09 10:42:00,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:42:00,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:42:00,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:42:00,243 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:42:00,245 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:42:00,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i [2021-11-09 10:42:00,324 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/data/01fcc02e1/4a2800995e0147bf9ac7f232903c276d/FLAG7114b7c4e [2021-11-09 10:42:00,866 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:42:00,867 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i [2021-11-09 10:42:00,889 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/data/01fcc02e1/4a2800995e0147bf9ac7f232903c276d/FLAG7114b7c4e [2021-11-09 10:42:01,131 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/data/01fcc02e1/4a2800995e0147bf9ac7f232903c276d [2021-11-09 10:42:01,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:42:01,135 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 10:42:01,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:42:01,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:42:01,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:42:01,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:42:01" (1/1) ... [2021-11-09 10:42:01,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@485862cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:42:01, skipping insertion in model container [2021-11-09 10:42:01,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:42:01" (1/1) ... [2021-11-09 10:42:01,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:42:01,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:42:01,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:42:01,532 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:42:01,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:42:01,605 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:42:01,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:42:01 WrapperNode [2021-11-09 10:42:01,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:42:01,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:42:01,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:42:01,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:42:01,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:42:01" (1/1) ... [2021-11-09 10:42:01,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:42:01" (1/1) ... [2021-11-09 10:42:01,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:42:01" (1/1) ... [2021-11-09 10:42:01,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:42:01" (1/1) ... [2021-11-09 10:42:01,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:42:01" (1/1) ... [2021-11-09 10:42:01,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:42:01" (1/1) ... [2021-11-09 10:42:01,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:42:01" (1/1) ... [2021-11-09 10:42:01,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:42:01,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:42:01,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:42:01,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:42:01,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:42:01" (1/1) ... [2021-11-09 10:42:01,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:42:01,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:01,707 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:42:01,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:42:01,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-09 10:42:01,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:42:01,750 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-09 10:42:01,750 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-09 10:42:01,750 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-09 10:42:01,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-09 10:42:01,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-09 10:42:01,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-09 10:42:01,751 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-09 10:42:01,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-09 10:42:01,751 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-09 10:42:01,751 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-09 10:42:01,752 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-09 10:42:01,752 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-09 10:42:01,752 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-09 10:42:01,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:42:01,752 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-09 10:42:01,752 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-09 10:42:01,752 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-09 10:42:01,753 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-09 10:42:01,753 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-09 10:42:01,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-09 10:42:01,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-09 10:42:01,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-09 10:42:01,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-09 10:42:01,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-09 10:42:01,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-09 10:42:01,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-09 10:42:01,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-09 10:42:01,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-09 10:42:01,754 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-09 10:42:01,754 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-09 10:42:01,754 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-09 10:42:01,754 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-09 10:42:01,755 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-09 10:42:01,755 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-09 10:42:01,755 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-09 10:42:01,755 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-09 10:42:01,755 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-09 10:42:01,755 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-09 10:42:01,755 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-09 10:42:01,755 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-09 10:42:01,756 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-09 10:42:01,756 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-09 10:42:01,756 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-09 10:42:01,756 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-09 10:42:01,756 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-09 10:42:01,756 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-09 10:42:01,756 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-09 10:42:01,757 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-09 10:42:01,757 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-09 10:42:01,757 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-09 10:42:01,757 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-09 10:42:01,757 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-09 10:42:01,757 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-09 10:42:01,757 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-09 10:42:01,757 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-09 10:42:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-09 10:42:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-09 10:42:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-09 10:42:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-09 10:42:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-09 10:42:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-09 10:42:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-09 10:42:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-09 10:42:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-09 10:42:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-09 10:42:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-09 10:42:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-09 10:42:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-09 10:42:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-09 10:42:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-09 10:42:01,760 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-09 10:42:01,760 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-09 10:42:01,760 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-09 10:42:01,760 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-09 10:42:01,760 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-09 10:42:01,760 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-09 10:42:01,760 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-09 10:42:01,760 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-09 10:42:01,761 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-09 10:42:01,761 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-09 10:42:01,761 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-09 10:42:01,761 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-09 10:42:01,761 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-09 10:42:01,761 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-09 10:42:01,761 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-09 10:42:01,762 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-09 10:42:01,762 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-09 10:42:01,762 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-09 10:42:01,762 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-09 10:42:01,762 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-09 10:42:01,762 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-09 10:42:01,762 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-09 10:42:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-09 10:42:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-09 10:42:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-09 10:42:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-09 10:42:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-09 10:42:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-09 10:42:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-09 10:42:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-09 10:42:01,764 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-09 10:42:01,764 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-09 10:42:01,764 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-09 10:42:01,764 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-09 10:42:01,764 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-09 10:42:01,764 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-09 10:42:01,764 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-09 10:42:01,765 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-09 10:42:01,765 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-09 10:42:01,765 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-09 10:42:01,765 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-09 10:42:01,765 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-09 10:42:01,765 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-09 10:42:01,765 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-09 10:42:01,765 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-09 10:42:01,766 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-09 10:42:01,766 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-09 10:42:01,766 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-09 10:42:01,766 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-09 10:42:01,766 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-09 10:42:01,766 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-09 10:42:01,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 10:42:01,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 10:42:01,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 10:42:01,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 10:42:01,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-09 10:42:01,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:42:01,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:42:01,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 10:42:01,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 10:42:02,296 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:42:02,296 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-09 10:42:02,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:42:02 BoogieIcfgContainer [2021-11-09 10:42:02,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:42:02,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:42:02,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:42:02,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:42:02,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:42:01" (1/3) ... [2021-11-09 10:42:02,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@288d3708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:42:02, skipping insertion in model container [2021-11-09 10:42:02,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:42:01" (2/3) ... [2021-11-09 10:42:02,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@288d3708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:42:02, skipping insertion in model container [2021-11-09 10:42:02,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:42:02" (3/3) ... [2021-11-09 10:42:02,315 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_extends_pointer.i [2021-11-09 10:42:02,322 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:42:02,325 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2021-11-09 10:42:02,363 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:42:02,369 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 10:42:02,369 INFO L340 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2021-11-09 10:42:02,389 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 32 states have (on average 2.03125) internal successors, (65), 59 states have internal predecessors, (65), 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 10:42:02,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-09 10:42:02,397 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:02,397 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:02,398 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:02,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:02,404 INFO L85 PathProgramCache]: Analyzing trace with hash 84956176, now seen corresponding path program 1 times [2021-11-09 10:42:02,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:02,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994864730] [2021-11-09 10:42:02,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:02,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:02,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:02,647 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 10:42:02,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:02,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994864730] [2021-11-09 10:42:02,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994864730] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:42:02,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:42:02,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:42:02,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064345707] [2021-11-09 10:42:02,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:42:02,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:02,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:42:02,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:42:02,672 INFO L87 Difference]: Start difference. First operand has 64 states, 32 states have (on average 2.03125) internal successors, (65), 59 states have internal predecessors, (65), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:02,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:02,828 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2021-11-09 10:42:02,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:42:02,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-09 10:42:02,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:02,838 INFO L225 Difference]: With dead ends: 67 [2021-11-09 10:42:02,839 INFO L226 Difference]: Without dead ends: 63 [2021-11-09 10:42:02,840 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 10:42:02,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-09 10:42:02,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2021-11-09 10:42:02,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 53 states have internal predecessors, (59), 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 10:42:02,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2021-11-09 10:42:02,877 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 7 [2021-11-09 10:42:02,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:02,877 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2021-11-09 10:42:02,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:02,878 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2021-11-09 10:42:02,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-09 10:42:02,878 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:02,878 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:02,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:42:02,879 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:02,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:02,880 INFO L85 PathProgramCache]: Analyzing trace with hash 84956177, now seen corresponding path program 1 times [2021-11-09 10:42:02,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:02,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315567582] [2021-11-09 10:42:02,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:02,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:02,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:03,022 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 10:42:03,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:03,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315567582] [2021-11-09 10:42:03,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315567582] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:42:03,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:42:03,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:42:03,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040528689] [2021-11-09 10:42:03,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:42:03,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:03,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:42:03,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:42:03,031 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:03,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:03,156 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-11-09 10:42:03,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:42:03,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-09 10:42:03,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:03,160 INFO L225 Difference]: With dead ends: 59 [2021-11-09 10:42:03,160 INFO L226 Difference]: Without dead ends: 59 [2021-11-09 10:42:03,161 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 10:42:03,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-09 10:42:03,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2021-11-09 10:42:03,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.588235294117647) internal successors, (54), 48 states have internal predecessors, (54), 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 10:42:03,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2021-11-09 10:42:03,175 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 7 [2021-11-09 10:42:03,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:03,176 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2021-11-09 10:42:03,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:03,176 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2021-11-09 10:42:03,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 10:42:03,177 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:03,177 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:03,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 10:42:03,178 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:03,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:03,180 INFO L85 PathProgramCache]: Analyzing trace with hash 904545164, now seen corresponding path program 1 times [2021-11-09 10:42:03,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:03,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860322194] [2021-11-09 10:42:03,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:03,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:03,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:03,334 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 10:42:03,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:03,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860322194] [2021-11-09 10:42:03,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860322194] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:42:03,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:42:03,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:42:03,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45715137] [2021-11-09 10:42:03,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:42:03,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:03,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:42:03,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:42:03,343 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:03,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:03,494 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-11-09 10:42:03,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:42:03,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-09 10:42:03,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:03,505 INFO L225 Difference]: With dead ends: 62 [2021-11-09 10:42:03,505 INFO L226 Difference]: Without dead ends: 62 [2021-11-09 10:42:03,505 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 10:42:03,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-09 10:42:03,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2021-11-09 10:42:03,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 51 states have internal predecessors, (60), 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 10:42:03,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-11-09 10:42:03,511 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 14 [2021-11-09 10:42:03,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:03,511 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-11-09 10:42:03,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:03,512 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-11-09 10:42:03,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 10:42:03,512 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:03,512 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:03,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 10:42:03,513 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:03,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:03,516 INFO L85 PathProgramCache]: Analyzing trace with hash 904545165, now seen corresponding path program 1 times [2021-11-09 10:42:03,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:03,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263147123] [2021-11-09 10:42:03,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:03,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:03,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:03,635 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 10:42:03,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:03,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263147123] [2021-11-09 10:42:03,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263147123] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:42:03,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:42:03,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:42:03,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052884455] [2021-11-09 10:42:03,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:42:03,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:03,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:42:03,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:42:03,638 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:03,807 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2021-11-09 10:42:03,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:42:03,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-09 10:42:03,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:03,812 INFO L225 Difference]: With dead ends: 91 [2021-11-09 10:42:03,812 INFO L226 Difference]: Without dead ends: 91 [2021-11-09 10:42:03,813 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 10:42:03,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-09 10:42:03,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 71. [2021-11-09 10:42:03,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 54 states have (on average 1.5185185185185186) internal successors, (82), 67 states have internal predecessors, (82), 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 10:42:03,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2021-11-09 10:42:03,832 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 14 [2021-11-09 10:42:03,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:03,832 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2021-11-09 10:42:03,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:03,833 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2021-11-09 10:42:03,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 10:42:03,833 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:03,834 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:03,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 10:42:03,835 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:03,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:03,836 INFO L85 PathProgramCache]: Analyzing trace with hash -2023871879, now seen corresponding path program 1 times [2021-11-09 10:42:03,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:03,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350043748] [2021-11-09 10:42:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:03,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:03,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:03,925 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 10:42:03,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:03,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350043748] [2021-11-09 10:42:03,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350043748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:42:03,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:42:03,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:42:03,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123269731] [2021-11-09 10:42:03,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:42:03,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:03,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:42:03,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:42:03,928 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:04,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:04,054 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2021-11-09 10:42:04,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:42:04,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-09 10:42:04,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:04,057 INFO L225 Difference]: With dead ends: 94 [2021-11-09 10:42:04,057 INFO L226 Difference]: Without dead ends: 94 [2021-11-09 10:42:04,057 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 10:42:04,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-09 10:42:04,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 71. [2021-11-09 10:42:04,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 54 states have (on average 1.4814814814814814) internal successors, (80), 67 states have internal predecessors, (80), 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 10:42:04,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2021-11-09 10:42:04,074 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 15 [2021-11-09 10:42:04,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:04,074 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2021-11-09 10:42:04,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:04,075 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2021-11-09 10:42:04,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 10:42:04,075 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:04,076 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 10:42:04,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 10:42:04,076 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:04,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:04,077 INFO L85 PathProgramCache]: Analyzing trace with hash 707942846, now seen corresponding path program 1 times [2021-11-09 10:42:04,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:04,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852155933] [2021-11-09 10:42:04,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:04,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:04,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:04,250 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 10:42:04,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:04,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852155933] [2021-11-09 10:42:04,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852155933] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:42:04,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:42:04,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:42:04,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864844018] [2021-11-09 10:42:04,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:42:04,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:04,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:42:04,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:42:04,252 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 5 states, 4 states have (on average 3.5) 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 10:42:04,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:04,341 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-11-09 10:42:04,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:42:04,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) 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 10:42:04,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:04,344 INFO L225 Difference]: With dead ends: 70 [2021-11-09 10:42:04,344 INFO L226 Difference]: Without dead ends: 70 [2021-11-09 10:42:04,345 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:42:04,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-09 10:42:04,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-11-09 10:42:04,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.462962962962963) internal successors, (79), 66 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 10:42:04,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2021-11-09 10:42:04,360 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 17 [2021-11-09 10:42:04,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:04,360 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2021-11-09 10:42:04,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) 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 10:42:04,360 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2021-11-09 10:42:04,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 10:42:04,361 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:04,361 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:04,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 10:42:04,362 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr24ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:04,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:04,362 INFO L85 PathProgramCache]: Analyzing trace with hash 843305101, now seen corresponding path program 1 times [2021-11-09 10:42:04,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:04,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750755394] [2021-11-09 10:42:04,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:04,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:04,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:04,455 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 10:42:04,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:04,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750755394] [2021-11-09 10:42:04,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750755394] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:42:04,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:42:04,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:42:04,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114807489] [2021-11-09 10:42:04,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:42:04,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:04,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:42:04,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:42:04,459 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 10:42:04,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:04,563 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2021-11-09 10:42:04,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:42:04,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 19 [2021-11-09 10:42:04,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:04,569 INFO L225 Difference]: With dead ends: 86 [2021-11-09 10:42:04,569 INFO L226 Difference]: Without dead ends: 86 [2021-11-09 10:42:04,570 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 10:42:04,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-09 10:42:04,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2021-11-09 10:42:04,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 63 states have (on average 1.507936507936508) internal successors, (95), 75 states have internal predecessors, (95), 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 10:42:04,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2021-11-09 10:42:04,580 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 19 [2021-11-09 10:42:04,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:04,581 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2021-11-09 10:42:04,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 10:42:04,581 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2021-11-09 10:42:04,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 10:42:04,582 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:04,582 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:04,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 10:42:04,583 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr20ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:04,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:04,584 INFO L85 PathProgramCache]: Analyzing trace with hash 843294116, now seen corresponding path program 1 times [2021-11-09 10:42:04,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:04,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132622148] [2021-11-09 10:42:04,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:04,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:04,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:04,758 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 10:42:04,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:04,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132622148] [2021-11-09 10:42:04,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132622148] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:42:04,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:42:04,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 10:42:04,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056116859] [2021-11-09 10:42:04,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:42:04,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:04,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:42:04,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:42:04,762 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 10:42:04,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:04,933 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2021-11-09 10:42:04,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 10:42:04,933 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 19 [2021-11-09 10:42:04,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:04,935 INFO L225 Difference]: With dead ends: 85 [2021-11-09 10:42:04,935 INFO L226 Difference]: Without dead ends: 85 [2021-11-09 10:42:04,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:42:04,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-09 10:42:04,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2021-11-09 10:42:04,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 58 states have (on average 1.4827586206896552) internal successors, (86), 70 states have internal predecessors, (86), 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 10:42:04,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2021-11-09 10:42:04,939 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 19 [2021-11-09 10:42:04,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:04,939 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2021-11-09 10:42:04,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 10:42:04,939 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2021-11-09 10:42:04,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 10:42:04,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:04,940 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:04,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 10:42:04,941 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:04,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:04,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1638672819, now seen corresponding path program 1 times [2021-11-09 10:42:04,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:04,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692184331] [2021-11-09 10:42:04,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:04,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:05,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:05,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:05,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:05,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692184331] [2021-11-09 10:42:05,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692184331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:05,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700346288] [2021-11-09 10:42:05,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:05,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:05,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:05,073 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:05,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:42:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:05,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 10:42:05,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:05,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:42:05,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:42:05,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:05,365 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 10:42:05,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:05,390 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 10:42:05,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:05,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:05,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:05,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:42:05,492 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 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-09 10:42:05,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:05,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:05,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:05,519 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 32 treesize of output 34 [2021-11-09 10:42:05,811 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-09 10:42:05,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 50 [2021-11-09 10:42:05,838 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-09 10:42:05,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 25 [2021-11-09 10:42:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:05,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700346288] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:05,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:05,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-11-09 10:42:05,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095274394] [2021-11-09 10:42:05,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 10:42:05,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:05,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 10:42:05,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:42:05,901 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 1 states have call successors, (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 10:42:06,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:06,278 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2021-11-09 10:42:06,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 10:42:06,278 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 1 states have call successors, (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 22 [2021-11-09 10:42:06,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:06,279 INFO L225 Difference]: With dead ends: 89 [2021-11-09 10:42:06,279 INFO L226 Difference]: Without dead ends: 89 [2021-11-09 10:42:06,280 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-11-09 10:42:06,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-09 10:42:06,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2021-11-09 10:42:06,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 69 states have (on average 1.4202898550724639) internal successors, (98), 81 states have internal predecessors, (98), 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 10:42:06,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2021-11-09 10:42:06,283 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 22 [2021-11-09 10:42:06,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:06,284 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2021-11-09 10:42:06,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 1 states have call successors, (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 10:42:06,284 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2021-11-09 10:42:06,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 10:42:06,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:06,285 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:06,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:06,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:06,496 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:06,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:06,497 INFO L85 PathProgramCache]: Analyzing trace with hash -740751054, now seen corresponding path program 1 times [2021-11-09 10:42:06,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:06,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167549953] [2021-11-09 10:42:06,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:06,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:06,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:06,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:06,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167549953] [2021-11-09 10:42:06,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167549953] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:06,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84682570] [2021-11-09 10:42:06,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:06,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:06,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:06,565 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:06,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 10:42:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:06,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 10:42:06,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:06,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84682570] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:06,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:06,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-09 10:42:06,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619147492] [2021-11-09 10:42:06,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:42:06,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:06,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:42:06,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:42:06,909 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand has 9 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 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 10:42:07,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:07,045 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2021-11-09 10:42:07,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:42:07,045 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 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 23 [2021-11-09 10:42:07,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:07,046 INFO L225 Difference]: With dead ends: 87 [2021-11-09 10:42:07,046 INFO L226 Difference]: Without dead ends: 76 [2021-11-09 10:42:07,047 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:42:07,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-09 10:42:07,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-09 10:42:07,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 60 states have (on average 1.4666666666666666) internal successors, (88), 72 states have internal predecessors, (88), 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 10:42:07,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2021-11-09 10:42:07,049 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 23 [2021-11-09 10:42:07,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:07,050 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2021-11-09 10:42:07,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 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 10:42:07,050 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2021-11-09 10:42:07,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 10:42:07,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:07,051 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:07,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:07,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 10:42:07,251 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:07,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:07,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1998577353, now seen corresponding path program 1 times [2021-11-09 10:42:07,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:07,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921045168] [2021-11-09 10:42:07,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:07,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:07,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:07,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:07,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921045168] [2021-11-09 10:42:07,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921045168] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:42:07,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:42:07,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:42:07,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798439364] [2021-11-09 10:42:07,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:42:07,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:07,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:42:07,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:42:07,333 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 10:42:07,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:07,454 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2021-11-09 10:42:07,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:42:07,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 23 [2021-11-09 10:42:07,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:07,455 INFO L225 Difference]: With dead ends: 85 [2021-11-09 10:42:07,455 INFO L226 Difference]: Without dead ends: 85 [2021-11-09 10:42:07,456 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:42:07,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-09 10:42:07,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2021-11-09 10:42:07,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.3859649122807018) internal successors, (79), 68 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 10:42:07,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2021-11-09 10:42:07,459 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 23 [2021-11-09 10:42:07,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:07,459 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2021-11-09 10:42:07,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 10:42:07,460 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2021-11-09 10:42:07,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 10:42:07,461 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:07,461 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:07,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 10:42:07,461 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr20ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:07,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:07,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1337569256, now seen corresponding path program 1 times [2021-11-09 10:42:07,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:07,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356101165] [2021-11-09 10:42:07,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:07,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:07,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:07,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:07,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356101165] [2021-11-09 10:42:07,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356101165] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:42:07,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:42:07,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 10:42:07,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843909459] [2021-11-09 10:42:07,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:42:07,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:07,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:42:07,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:42:07,587 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:07,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:07,834 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2021-11-09 10:42:07,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 10:42:07,835 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-11-09 10:42:07,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:07,836 INFO L225 Difference]: With dead ends: 91 [2021-11-09 10:42:07,836 INFO L226 Difference]: Without dead ends: 91 [2021-11-09 10:42:07,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:42:07,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-09 10:42:07,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2021-11-09 10:42:07,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.368421052631579) internal successors, (78), 68 states have internal predecessors, (78), 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 10:42:07,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2021-11-09 10:42:07,839 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 28 [2021-11-09 10:42:07,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:07,839 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2021-11-09 10:42:07,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:07,840 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2021-11-09 10:42:07,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 10:42:07,841 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:07,841 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:07,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 10:42:07,841 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr21ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:07,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:07,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1485025910, now seen corresponding path program 1 times [2021-11-09 10:42:07,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:07,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713751353] [2021-11-09 10:42:07,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:07,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:07,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:07,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:07,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713751353] [2021-11-09 10:42:07,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713751353] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:42:07,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:42:07,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 10:42:07,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004178118] [2021-11-09 10:42:07,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:42:07,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:07,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:42:07,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:42:07,962 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 10:42:08,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:08,222 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2021-11-09 10:42:08,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 10:42:08,223 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 29 [2021-11-09 10:42:08,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:08,223 INFO L225 Difference]: With dead ends: 90 [2021-11-09 10:42:08,223 INFO L226 Difference]: Without dead ends: 90 [2021-11-09 10:42:08,224 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:42:08,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-09 10:42:08,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 72. [2021-11-09 10:42:08,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 68 states have internal predecessors, (77), 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 10:42:08,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2021-11-09 10:42:08,227 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 29 [2021-11-09 10:42:08,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:08,227 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2021-11-09 10:42:08,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 10:42:08,227 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2021-11-09 10:42:08,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 10:42:08,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:08,228 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] [2021-11-09 10:42:08,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 10:42:08,228 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:08,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:08,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1186586680, now seen corresponding path program 1 times [2021-11-09 10:42:08,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:08,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093810500] [2021-11-09 10:42:08,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:08,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:08,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:08,382 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 10:42:08,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:08,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093810500] [2021-11-09 10:42:08,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093810500] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:08,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200831684] [2021-11-09 10:42:08,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:08,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:08,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:08,384 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:08,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 10:42:08,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:08,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 10:42:08,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:08,557 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 10:42:08,592 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:42:08,592 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 10:42:08,617 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 10:42:08,663 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 10:42:08,663 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 39 treesize of output 29 [2021-11-09 10:42:08,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:08,784 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-11-09 10:42:08,785 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 44 treesize of output 41 [2021-11-09 10:42:08,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:42:08,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:42:08,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-09 10:42:08,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045894076] [2021-11-09 10:42:08,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 10:42:08,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:08,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 10:42:08,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:42:08,850 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:09,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:09,311 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2021-11-09 10:42:09,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 10:42:09,312 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-11-09 10:42:09,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:09,313 INFO L225 Difference]: With dead ends: 100 [2021-11-09 10:42:09,313 INFO L226 Difference]: Without dead ends: 100 [2021-11-09 10:42:09,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-11-09 10:42:09,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-09 10:42:09,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 77. [2021-11-09 10:42:09,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.3709677419354838) internal successors, (85), 73 states have internal predecessors, (85), 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 10:42:09,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2021-11-09 10:42:09,316 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 30 [2021-11-09 10:42:09,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:09,317 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2021-11-09 10:42:09,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:09,317 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2021-11-09 10:42:09,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 10:42:09,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:09,320 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] [2021-11-09 10:42:09,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:09,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 10:42:09,521 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:09,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:09,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1186586679, now seen corresponding path program 1 times [2021-11-09 10:42:09,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:09,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987909123] [2021-11-09 10:42:09,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:09,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:09,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:09,742 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 10:42:09,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:09,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987909123] [2021-11-09 10:42:09,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987909123] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:09,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473578783] [2021-11-09 10:42:09,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:09,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:09,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:09,753 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:09,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 10:42:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:09,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 10:42:09,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:09,959 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 10:42:09,964 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 10:42:10,037 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:42:10,038 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 10:42:10,043 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 12 treesize of output 14 [2021-11-09 10:42:10,092 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 10:42:10,097 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 10:42:10,158 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-09 10:42:10,159 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 75 treesize of output 57 [2021-11-09 10:42:10,169 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-09 10:42:10,170 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 67 treesize of output 57 [2021-11-09 10:42:10,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:10,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:10,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:42:10,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 68 [2021-11-09 10:42:10,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:10,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:10,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:42:10,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 73 [2021-11-09 10:42:10,620 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-09 10:42:10,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 69 [2021-11-09 10:42:10,635 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-11-09 10:42:10,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 39 [2021-11-09 10:42:10,833 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 10:42:10,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473578783] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:10,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:10,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-11-09 10:42:10,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448060828] [2021-11-09 10:42:10,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 10:42:10,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:10,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 10:42:10,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-09 10:42:10,835 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 1 states have call successors, (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 10:42:12,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:12,489 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2021-11-09 10:42:12,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 10:42:12,489 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 1 states have call successors, (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 30 [2021-11-09 10:42:12,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:12,490 INFO L225 Difference]: With dead ends: 129 [2021-11-09 10:42:12,490 INFO L226 Difference]: Without dead ends: 129 [2021-11-09 10:42:12,491 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=485, Invalid=1321, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 10:42:12,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-09 10:42:12,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 89. [2021-11-09 10:42:12,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 74 states have (on average 1.3918918918918919) internal successors, (103), 85 states have internal predecessors, (103), 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 10:42:12,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2021-11-09 10:42:12,495 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 30 [2021-11-09 10:42:12,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:12,495 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2021-11-09 10:42:12,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 1 states have call successors, (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 10:42:12,495 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2021-11-09 10:42:12,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 10:42:12,496 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:12,496 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:12,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:12,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 10:42:12,721 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr22ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:12,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:12,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1208837162, now seen corresponding path program 1 times [2021-11-09 10:42:12,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:12,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703742186] [2021-11-09 10:42:12,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:12,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:12,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:12,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:12,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703742186] [2021-11-09 10:42:12,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703742186] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:42:12,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:42:12,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 10:42:12,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761609845] [2021-11-09 10:42:12,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:42:12,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:12,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:42:12,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:42:12,870 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:13,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:13,053 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2021-11-09 10:42:13,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:42:13,054 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-11-09 10:42:13,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:13,055 INFO L225 Difference]: With dead ends: 89 [2021-11-09 10:42:13,055 INFO L226 Difference]: Without dead ends: 89 [2021-11-09 10:42:13,055 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:42:13,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-09 10:42:13,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-09 10:42:13,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 74 states have (on average 1.3783783783783783) internal successors, (102), 85 states have internal predecessors, (102), 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 10:42:13,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2021-11-09 10:42:13,058 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 30 [2021-11-09 10:42:13,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:13,058 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2021-11-09 10:42:13,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:13,059 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2021-11-09 10:42:13,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 10:42:13,059 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:13,059 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:13,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 10:42:13,059 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:13,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:13,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1870517693, now seen corresponding path program 1 times [2021-11-09 10:42:13,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:13,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506167563] [2021-11-09 10:42:13,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:13,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:13,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:13,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:13,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506167563] [2021-11-09 10:42:13,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506167563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:13,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56936526] [2021-11-09 10:42:13,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:13,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:13,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:13,196 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:13,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 10:42:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:13,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 10:42:13,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:13,466 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 10:42:13,515 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:42:13,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 10:42:13,548 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 10:42:13,586 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 10:42:13,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-11-09 10:42:13,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:13,669 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-11-09 10:42:13,669 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 43 treesize of output 40 [2021-11-09 10:42:13,709 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:42:13,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:42:13,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-09 10:42:13,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636613101] [2021-11-09 10:42:13,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 10:42:13,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:13,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 10:42:13,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:42:13,711 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 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 10:42:14,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:14,064 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2021-11-09 10:42:14,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 10:42:14,064 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 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 31 [2021-11-09 10:42:14,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:14,065 INFO L225 Difference]: With dead ends: 114 [2021-11-09 10:42:14,065 INFO L226 Difference]: Without dead ends: 114 [2021-11-09 10:42:14,066 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2021-11-09 10:42:14,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-09 10:42:14,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 89. [2021-11-09 10:42:14,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 74 states have (on average 1.3513513513513513) internal successors, (100), 85 states have internal predecessors, (100), 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 10:42:14,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2021-11-09 10:42:14,069 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 31 [2021-11-09 10:42:14,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:14,069 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2021-11-09 10:42:14,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 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 10:42:14,070 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2021-11-09 10:42:14,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 10:42:14,070 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:14,070 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:14,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:14,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 10:42:14,288 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr25ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:14,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:14,289 INFO L85 PathProgramCache]: Analyzing trace with hash -832763599, now seen corresponding path program 1 times [2021-11-09 10:42:14,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:14,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228115803] [2021-11-09 10:42:14,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:14,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:14,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:14,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:14,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228115803] [2021-11-09 10:42:14,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228115803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:42:14,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:42:14,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-09 10:42:14,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697501527] [2021-11-09 10:42:14,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:42:14,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:14,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:42:14,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:42:14,444 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 10:42:14,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:14,727 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2021-11-09 10:42:14,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 10:42:14,728 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 10:42:14,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:14,729 INFO L225 Difference]: With dead ends: 102 [2021-11-09 10:42:14,729 INFO L226 Difference]: Without dead ends: 102 [2021-11-09 10:42:14,729 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-11-09 10:42:14,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-09 10:42:14,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 89. [2021-11-09 10:42:14,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 74 states have (on average 1.337837837837838) internal successors, (99), 85 states have internal predecessors, (99), 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 10:42:14,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 102 transitions. [2021-11-09 10:42:14,733 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 102 transitions. Word has length 33 [2021-11-09 10:42:14,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:14,734 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 102 transitions. [2021-11-09 10:42:14,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 10:42:14,734 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 102 transitions. [2021-11-09 10:42:14,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 10:42:14,734 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:14,735 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:14,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-09 10:42:14,735 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr24ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:14,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:14,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1616132561, now seen corresponding path program 1 times [2021-11-09 10:42:14,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:14,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698118281] [2021-11-09 10:42:14,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:14,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:14,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:14,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:14,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:14,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698118281] [2021-11-09 10:42:14,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698118281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:14,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913498883] [2021-11-09 10:42:14,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:14,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:14,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:14,905 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:14,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 10:42:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:15,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 10:42:15,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:15,161 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 10:42:15,215 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:42:15,215 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 10:42:15,248 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 10:42:15,289 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 10:42:15,290 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 39 treesize of output 29 [2021-11-09 10:42:15,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:15,381 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-11-09 10:42:15,381 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 44 treesize of output 41 [2021-11-09 10:42:15,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:42:15,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:42:15,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-09 10:42:15,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250137806] [2021-11-09 10:42:15,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 10:42:15,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:15,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 10:42:15,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:42:15,426 INFO L87 Difference]: Start difference. First operand 89 states and 102 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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 10:42:15,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:15,805 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2021-11-09 10:42:15,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 10:42:15,806 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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 35 [2021-11-09 10:42:15,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:15,807 INFO L225 Difference]: With dead ends: 106 [2021-11-09 10:42:15,807 INFO L226 Difference]: Without dead ends: 106 [2021-11-09 10:42:15,808 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2021-11-09 10:42:15,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-09 10:42:15,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 91. [2021-11-09 10:42:15,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 76 states have (on average 1.3289473684210527) internal successors, (101), 87 states have internal predecessors, (101), 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 10:42:15,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2021-11-09 10:42:15,812 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 35 [2021-11-09 10:42:15,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:15,812 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2021-11-09 10:42:15,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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 10:42:15,813 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2021-11-09 10:42:15,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 10:42:15,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:15,813 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:15,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-09 10:42:16,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:16,021 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr20ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:16,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:16,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1616121576, now seen corresponding path program 1 times [2021-11-09 10:42:16,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:16,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145833281] [2021-11-09 10:42:16,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:16,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:16,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:16,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:16,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:16,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145833281] [2021-11-09 10:42:16,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145833281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:16,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861239764] [2021-11-09 10:42:16,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:16,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:16,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:16,439 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:16,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 10:42:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:16,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 10:42:16,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:16,707 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 10:42:16,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 10:42:16,742 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 13 treesize of output 9 [2021-11-09 10:42:16,842 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:42:16,842 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 10:42:16,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 10:42:16,912 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 10:42:16,988 INFO L354 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2021-11-09 10:42:16,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 80 [2021-11-09 10:42:17,009 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-09 10:42:17,009 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 83 [2021-11-09 10:42:17,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:17,151 INFO L354 Elim1Store]: treesize reduction 148, result has 15.4 percent of original size [2021-11-09 10:42:17,151 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 115 treesize of output 103 [2021-11-09 10:42:17,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:17,175 INFO L354 Elim1Store]: treesize reduction 124, result has 15.6 percent of original size [2021-11-09 10:42:17,175 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 111 treesize of output 106 [2021-11-09 10:42:18,587 INFO L354 Elim1Store]: treesize reduction 220, result has 3.1 percent of original size [2021-11-09 10:42:18,587 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 139 treesize of output 90 [2021-11-09 10:42:18,625 INFO L354 Elim1Store]: treesize reduction 152, result has 4.4 percent of original size [2021-11-09 10:42:18,626 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 69 treesize of output 47 [2021-11-09 10:42:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:18,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861239764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:18,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:18,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-11-09 10:42:18,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805391435] [2021-11-09 10:42:18,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 10:42:18,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:18,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 10:42:18,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-11-09 10:42:18,643 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 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 10:42:21,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:21,680 INFO L93 Difference]: Finished difference Result 171 states and 187 transitions. [2021-11-09 10:42:21,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 10:42:21,680 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 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 35 [2021-11-09 10:42:21,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:21,681 INFO L225 Difference]: With dead ends: 171 [2021-11-09 10:42:21,681 INFO L226 Difference]: Without dead ends: 171 [2021-11-09 10:42:21,683 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=546, Invalid=2760, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 10:42:21,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-09 10:42:21,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 133. [2021-11-09 10:42:21,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 118 states have (on average 1.2627118644067796) internal successors, (149), 129 states have internal predecessors, (149), 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 10:42:21,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2021-11-09 10:42:21,688 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 35 [2021-11-09 10:42:21,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:21,688 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2021-11-09 10:42:21,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 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 10:42:21,689 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2021-11-09 10:42:21,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 10:42:21,689 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:21,690 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] [2021-11-09 10:42:21,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:21,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:21,905 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:21,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:21,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1421898476, now seen corresponding path program 1 times [2021-11-09 10:42:21,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:21,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850997355] [2021-11-09 10:42:21,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:21,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:22,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:22,250 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 10:42:22,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:22,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850997355] [2021-11-09 10:42:22,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850997355] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:22,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324660473] [2021-11-09 10:42:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:22,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:22,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:22,251 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:22,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 10:42:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:22,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 10:42:22,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:22,541 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 10:42:22,577 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:42:22,592 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 10:42:22,603 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 10:42:22,640 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 10:42:22,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 51 [2021-11-09 10:42:22,762 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 10:42:22,763 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 21 treesize of output 29 [2021-11-09 10:42:22,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:22,839 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-11-09 10:42:22,840 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 57 treesize of output 50 [2021-11-09 10:42:22,917 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:42:22,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:42:22,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-09 10:42:22,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617115708] [2021-11-09 10:42:22,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 10:42:22,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:22,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 10:42:22,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-09 10:42:22,919 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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 10:42:23,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:23,811 INFO L93 Difference]: Finished difference Result 142 states and 160 transitions. [2021-11-09 10:42:23,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 10:42:23,812 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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 35 [2021-11-09 10:42:23,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:23,813 INFO L225 Difference]: With dead ends: 142 [2021-11-09 10:42:23,813 INFO L226 Difference]: Without dead ends: 142 [2021-11-09 10:42:23,814 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=341, Invalid=1141, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 10:42:23,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-09 10:42:23,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 133. [2021-11-09 10:42:23,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 118 states have (on average 1.2457627118644068) internal successors, (147), 129 states have internal predecessors, (147), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 150 transitions. [2021-11-09 10:42:23,830 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 150 transitions. Word has length 35 [2021-11-09 10:42:23,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:23,831 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 150 transitions. [2021-11-09 10:42:23,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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 10:42:23,831 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 150 transitions. [2021-11-09 10:42:23,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 10:42:23,832 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:23,834 INFO L513 BasicCegarLoop]: trace histogram [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 10:42:23,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:24,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-09 10:42:24,057 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:24,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:24,058 INFO L85 PathProgramCache]: Analyzing trace with hash -644833995, now seen corresponding path program 1 times [2021-11-09 10:42:24,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:24,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028785923] [2021-11-09 10:42:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:24,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:24,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 10:42:24,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:24,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028785923] [2021-11-09 10:42:24,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028785923] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:42:24,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:42:24,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:42:24,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115504526] [2021-11-09 10:42:24,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:42:24,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:24,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:42:24,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:42:24,110 INFO L87 Difference]: Start difference. First operand 133 states and 150 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 10:42:24,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:24,222 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2021-11-09 10:42:24,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:42:24,225 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 37 [2021-11-09 10:42:24,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:24,226 INFO L225 Difference]: With dead ends: 134 [2021-11-09 10:42:24,226 INFO L226 Difference]: Without dead ends: 134 [2021-11-09 10:42:24,227 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 10:42:24,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-09 10:42:24,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 118. [2021-11-09 10:42:24,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 104 states have (on average 1.25) internal successors, (130), 114 states have internal predecessors, (130), 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 10:42:24,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 133 transitions. [2021-11-09 10:42:24,231 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 133 transitions. Word has length 37 [2021-11-09 10:42:24,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:24,232 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 133 transitions. [2021-11-09 10:42:24,232 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 10:42:24,232 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 133 transitions. [2021-11-09 10:42:24,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 10:42:24,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:24,233 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:24,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-09 10:42:24,233 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:24,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:24,234 INFO L85 PathProgramCache]: Analyzing trace with hash -378140177, now seen corresponding path program 2 times [2021-11-09 10:42:24,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:24,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747757686] [2021-11-09 10:42:24,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:24,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:24,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:24,543 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:24,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:24,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747757686] [2021-11-09 10:42:24,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747757686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:24,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287341454] [2021-11-09 10:42:24,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:42:24,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:24,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:24,549 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:24,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 10:42:24,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:42:24,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:24,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-09 10:42:24,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:24,888 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 10:42:24,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 10:42:24,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:42:24,948 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 26 treesize of output 21 [2021-11-09 10:42:24,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:24,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:24,955 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 10:42:24,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-09 10:42:24,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:24,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:24,968 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 10:42:25,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:25,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:25,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:25,024 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 32 treesize of output 34 [2021-11-09 10:42:25,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:25,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:25,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:25,037 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 32 [2021-11-09 10:42:25,214 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:42:25,215 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 10:42:25,290 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 33 treesize of output 38 [2021-11-09 10:42:25,303 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 33 treesize of output 38 [2021-11-09 10:42:25,444 INFO L354 Elim1Store]: treesize reduction 112, result has 28.7 percent of original size [2021-11-09 10:42:25,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 136 treesize of output 119 [2021-11-09 10:42:25,484 INFO L354 Elim1Store]: treesize reduction 100, result has 31.0 percent of original size [2021-11-09 10:42:25,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 144 treesize of output 139 [2021-11-09 10:42:25,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:42:25,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:25,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:25,774 INFO L354 Elim1Store]: treesize reduction 124, result has 15.6 percent of original size [2021-11-09 10:42:25,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 172 treesize of output 166 [2021-11-09 10:42:25,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:42:25,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:25,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:25,811 INFO L354 Elim1Store]: treesize reduction 130, result has 13.9 percent of original size [2021-11-09 10:42:25,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 168 treesize of output 146 [2021-11-09 10:42:32,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:42:32,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:42:32,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-09 10:42:32,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437916701] [2021-11-09 10:42:32,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 10:42:32,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:32,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 10:42:32,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-11-09 10:42:32,118 INFO L87 Difference]: Start difference. First operand 118 states and 133 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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 10:42:32,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:32,824 INFO L93 Difference]: Finished difference Result 159 states and 178 transitions. [2021-11-09 10:42:32,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 10:42:32,824 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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 10:42:32,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:32,825 INFO L225 Difference]: With dead ends: 159 [2021-11-09 10:42:32,826 INFO L226 Difference]: Without dead ends: 159 [2021-11-09 10:42:32,826 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 10:42:32,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-09 10:42:32,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2021-11-09 10:42:32,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 143 states have (on average 1.2097902097902098) 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 10:42:32,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 176 transitions. [2021-11-09 10:42:32,831 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 176 transitions. Word has length 38 [2021-11-09 10:42:32,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:32,831 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 176 transitions. [2021-11-09 10:42:32,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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 10:42:32,831 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 176 transitions. [2021-11-09 10:42:32,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 10:42:32,832 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:32,832 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:32,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:33,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 10:42:33,045 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:33,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:33,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1162555510, now seen corresponding path program 2 times [2021-11-09 10:42:33,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:33,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741440969] [2021-11-09 10:42:33,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:33,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:33,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:33,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:33,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:33,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741440969] [2021-11-09 10:42:33,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741440969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:33,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494522248] [2021-11-09 10:42:33,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:42:33,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:33,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:33,377 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:33,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 10:42:33,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:42:33,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:33,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 10:42:33,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:33,880 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-09 10:42:33,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-11-09 10:42:33,918 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 10:42:33,976 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 10:42:33,976 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 48 treesize of output 34 [2021-11-09 10:42:34,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:34,080 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-11-09 10:42:34,081 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 53 treesize of output 46 [2021-11-09 10:42:34,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:42:34,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:42:34,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-09 10:42:34,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588703362] [2021-11-09 10:42:34,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 10:42:34,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:34,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 10:42:34,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-11-09 10:42:34,136 INFO L87 Difference]: Start difference. First operand 157 states and 176 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:34,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:34,539 INFO L93 Difference]: Finished difference Result 171 states and 189 transitions. [2021-11-09 10:42:34,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:42:34,540 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-11-09 10:42:34,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:34,541 INFO L225 Difference]: With dead ends: 171 [2021-11-09 10:42:34,541 INFO L226 Difference]: Without dead ends: 152 [2021-11-09 10:42:34,541 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:42:34,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-09 10:42:34,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-11-09 10:42:34,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 138 states have (on average 1.210144927536232) internal successors, (167), 148 states have internal predecessors, (167), 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 10:42:34,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 170 transitions. [2021-11-09 10:42:34,545 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 170 transitions. Word has length 39 [2021-11-09 10:42:34,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:34,546 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 170 transitions. [2021-11-09 10:42:34,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:34,546 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 170 transitions. [2021-11-09 10:42:34,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 10:42:34,547 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:34,547 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 10:42:34,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:34,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 10:42:34,757 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:34,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:34,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1718688977, now seen corresponding path program 1 times [2021-11-09 10:42:34,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:34,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588880651] [2021-11-09 10:42:34,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:34,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:34,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 10:42:34,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:34,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588880651] [2021-11-09 10:42:34,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588880651] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:42:34,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:42:34,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-09 10:42:34,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415793243] [2021-11-09 10:42:34,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:42:34,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:34,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:42:34,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:42:34,893 INFO L87 Difference]: Start difference. First operand 152 states and 170 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 10:42:35,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:35,147 INFO L93 Difference]: Finished difference Result 160 states and 175 transitions. [2021-11-09 10:42:35,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 10:42:35,148 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 40 [2021-11-09 10:42:35,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:35,149 INFO L225 Difference]: With dead ends: 160 [2021-11-09 10:42:35,149 INFO L226 Difference]: Without dead ends: 160 [2021-11-09 10:42:35,149 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-11-09 10:42:35,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-09 10:42:35,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 152. [2021-11-09 10:42:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 138 states have (on average 1.1884057971014492) internal successors, (164), 148 states have internal predecessors, (164), 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 10:42:35,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 167 transitions. [2021-11-09 10:42:35,154 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 167 transitions. Word has length 40 [2021-11-09 10:42:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:35,154 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 167 transitions. [2021-11-09 10:42:35,155 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 10:42:35,155 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 167 transitions. [2021-11-09 10:42:35,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 10:42:35,155 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:35,155 INFO L513 BasicCegarLoop]: trace histogram [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 10:42:35,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-09 10:42:35,156 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:35,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:35,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1181350058, now seen corresponding path program 1 times [2021-11-09 10:42:35,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:35,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419403311] [2021-11-09 10:42:35,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:35,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:36,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:36,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:36,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419403311] [2021-11-09 10:42:36,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419403311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:36,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434262496] [2021-11-09 10:42:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:36,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:36,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:36,042 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:36,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 10:42:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:36,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-09 10:42:36,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:36,536 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-09 10:42:36,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-11-09 10:42:36,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 10:42:36,640 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 10:42:36,640 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 48 treesize of output 34 [2021-11-09 10:42:36,772 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-09 10:42:36,773 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 10:42:36,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:36,873 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-11-09 10:42:36,874 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 70 treesize of output 59 [2021-11-09 10:42:36,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:42:36,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:42:36,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-09 10:42:36,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452369784] [2021-11-09 10:42:36,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 10:42:36,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:36,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 10:42:36,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2021-11-09 10:42:36,988 INFO L87 Difference]: Start difference. First operand 152 states and 167 transitions. Second operand has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:38,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:38,138 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2021-11-09 10:42:38,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 10:42:38,138 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-11-09 10:42:38,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:38,139 INFO L225 Difference]: With dead ends: 154 [2021-11-09 10:42:38,139 INFO L226 Difference]: Without dead ends: 131 [2021-11-09 10:42:38,140 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 10:42:38,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-09 10:42:38,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-11-09 10:42:38,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 117 states have (on average 1.2136752136752136) internal successors, (142), 127 states have internal predecessors, (142), 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 10:42:38,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2021-11-09 10:42:38,145 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 44 [2021-11-09 10:42:38,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:38,145 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2021-11-09 10:42:38,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:38,145 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2021-11-09 10:42:38,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 10:42:38,146 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:38,146 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:38,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:38,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 10:42:38,369 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr20ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:38,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:38,369 INFO L85 PathProgramCache]: Analyzing trace with hash -510324436, now seen corresponding path program 1 times [2021-11-09 10:42:38,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:38,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110425517] [2021-11-09 10:42:38,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:38,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:38,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:38,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:38,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:38,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110425517] [2021-11-09 10:42:38,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110425517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:38,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079357954] [2021-11-09 10:42:38,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:38,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:38,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:38,662 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:38,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 10:42:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:39,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 10:42:39,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:39,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 10:42:39,263 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:42:39,263 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 10:42:39,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 10:42:39,299 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 10:42:39,344 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-09 10:42:39,344 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 76 treesize of output 58 [2021-11-09 10:42:39,367 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-09 10:42:39,367 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 64 [2021-11-09 10:42:39,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:39,455 INFO L354 Elim1Store]: treesize reduction 65, result has 16.7 percent of original size [2021-11-09 10:42:39,455 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 88 treesize of output 81 [2021-11-09 10:42:39,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:39,475 INFO L354 Elim1Store]: treesize reduction 124, result has 15.6 percent of original size [2021-11-09 10:42:39,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 84 treesize of output 87 [2021-11-09 10:42:39,717 INFO L354 Elim1Store]: treesize reduction 68, result has 4.2 percent of original size [2021-11-09 10:42:39,718 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 94 treesize of output 66 [2021-11-09 10:42:40,398 INFO L354 Elim1Store]: treesize reduction 142, result has 4.7 percent of original size [2021-11-09 10:42:40,398 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 9 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 44 [2021-11-09 10:42:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:40,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079357954] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:40,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:40,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-11-09 10:42:40,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353858482] [2021-11-09 10:42:40,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 10:42:40,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:40,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 10:42:40,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-11-09 10:42:40,406 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 27 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 26 states have internal predecessors, (79), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:47,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:47,819 INFO L93 Difference]: Finished difference Result 180 states and 193 transitions. [2021-11-09 10:42:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-09 10:42:47,820 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 26 states have internal predecessors, (79), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-11-09 10:42:47,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:47,821 INFO L225 Difference]: With dead ends: 180 [2021-11-09 10:42:47,821 INFO L226 Difference]: Without dead ends: 180 [2021-11-09 10:42:47,823 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=574, Invalid=3332, Unknown=0, NotChecked=0, Total=3906 [2021-11-09 10:42:47,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-09 10:42:47,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 131. [2021-11-09 10:42:47,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 117 states have (on average 1.205128205128205) internal successors, (141), 127 states have internal predecessors, (141), 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 10:42:47,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2021-11-09 10:42:47,827 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 44 [2021-11-09 10:42:47,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:47,827 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2021-11-09 10:42:47,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 26 states have internal predecessors, (79), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:47,828 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2021-11-09 10:42:47,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 10:42:47,828 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:47,828 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:47,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:48,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 10:42:48,029 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr21ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:48,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:48,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1359811782, now seen corresponding path program 1 times [2021-11-09 10:42:48,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:48,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185331479] [2021-11-09 10:42:48,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:48,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:48,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:48,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:48,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185331479] [2021-11-09 10:42:48,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185331479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:48,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924962550] [2021-11-09 10:42:48,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:48,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:48,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:48,337 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:48,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 10:42:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:48,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 10:42:48,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:48,859 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 10:42:48,928 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:42:48,929 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 10:42:48,976 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 10:42:48,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 10:42:49,045 INFO L354 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2021-11-09 10:42:49,049 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 76 treesize of output 61 [2021-11-09 10:42:49,060 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-09 10:42:49,060 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 68 treesize of output 58 [2021-11-09 10:42:49,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:49,178 INFO L354 Elim1Store]: treesize reduction 148, result has 15.4 percent of original size [2021-11-09 10:42:49,178 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 88 treesize of output 84 [2021-11-09 10:42:49,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:49,189 INFO L354 Elim1Store]: treesize reduction 59, result has 15.7 percent of original size [2021-11-09 10:42:49,189 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 84 treesize of output 81 [2021-11-09 10:42:49,394 INFO L354 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2021-11-09 10:42:49,395 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 94 treesize of output 72 [2021-11-09 10:42:50,247 INFO L354 Elim1Store]: treesize reduction 172, result has 3.9 percent of original size [2021-11-09 10:42:50,247 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 61 treesize of output 35 [2021-11-09 10:42:50,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:50,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924962550] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:50,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:50,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-11-09 10:42:50,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995730384] [2021-11-09 10:42:50,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 10:42:50,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:50,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 10:42:50,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-11-09 10:42:50,266 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 27 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 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 10:42:54,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:54,098 INFO L93 Difference]: Finished difference Result 178 states and 191 transitions. [2021-11-09 10:42:54,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-09 10:42:54,099 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 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 45 [2021-11-09 10:42:54,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:54,100 INFO L225 Difference]: With dead ends: 178 [2021-11-09 10:42:54,101 INFO L226 Difference]: Without dead ends: 178 [2021-11-09 10:42:54,102 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=584, Invalid=3448, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 10:42:54,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-09 10:42:54,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 131. [2021-11-09 10:42:54,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 117 states have (on average 1.1965811965811965) internal successors, (140), 127 states have internal predecessors, (140), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:54,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 143 transitions. [2021-11-09 10:42:54,107 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 143 transitions. Word has length 45 [2021-11-09 10:42:54,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:54,107 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 143 transitions. [2021-11-09 10:42:54,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 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 10:42:54,108 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 143 transitions. [2021-11-09 10:42:54,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 10:42:54,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:54,108 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-09 10:42:54,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:54,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:54,321 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:54,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:54,322 INFO L85 PathProgramCache]: Analyzing trace with hash -934070780, now seen corresponding path program 3 times [2021-11-09 10:42:54,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:54,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285308705] [2021-11-09 10:42:54,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:54,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:54,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:54,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:54,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285308705] [2021-11-09 10:42:54,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285308705] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:54,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496464649] [2021-11-09 10:42:54,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:42:54,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:54,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:54,825 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:54,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 10:42:55,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 10:42:55,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:55,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 10:42:55,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:55,573 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 10:42:55,604 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:42:55,604 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 10:42:55,641 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 10:42:55,705 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 10:42:55,706 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 39 treesize of output 29 [2021-11-09 10:42:55,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:55,824 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-11-09 10:42:55,824 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 44 treesize of output 41 [2021-11-09 10:42:55,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:42:55,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:42:55,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-09 10:42:55,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081822390] [2021-11-09 10:42:55,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 10:42:55,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:55,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 10:42:55,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:42:55,896 INFO L87 Difference]: Start difference. First operand 131 states and 143 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:57,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:57,213 INFO L93 Difference]: Finished difference Result 184 states and 197 transitions. [2021-11-09 10:42:57,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 10:42:57,213 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-11-09 10:42:57,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:57,214 INFO L225 Difference]: With dead ends: 184 [2021-11-09 10:42:57,215 INFO L226 Difference]: Without dead ends: 184 [2021-11-09 10:42:57,215 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=334, Invalid=1388, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 10:42:57,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-09 10:42:57,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 152. [2021-11-09 10:42:57,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 138 states have (on average 1.1884057971014492) internal successors, (164), 148 states have internal predecessors, (164), 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 10:42:57,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 167 transitions. [2021-11-09 10:42:57,221 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 167 transitions. Word has length 46 [2021-11-09 10:42:57,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:57,221 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 167 transitions. [2021-11-09 10:42:57,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:42:57,222 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 167 transitions. [2021-11-09 10:42:57,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 10:42:57,222 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:57,222 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-09 10:42:57,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:57,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 10:42:57,445 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:42:57,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:57,446 INFO L85 PathProgramCache]: Analyzing trace with hash -934070779, now seen corresponding path program 2 times [2021-11-09 10:42:57,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:57,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554830013] [2021-11-09 10:42:57,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:57,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:57,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:42:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:57,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:57,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554830013] [2021-11-09 10:42:57,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554830013] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:57,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712408740] [2021-11-09 10:42:57,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:42:57,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:57,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:57,969 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:57,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 10:42:58,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:42:58,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:58,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-09 10:42:58,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:58,557 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 10:42:58,562 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 10:42:58,642 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:42:58,642 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 10:42:58,655 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 12 treesize of output 14 [2021-11-09 10:42:58,716 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 10:42:58,727 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 10:42:58,816 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-09 10:42:58,816 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 84 treesize of output 62 [2021-11-09 10:42:58,827 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-09 10:42:58,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 66 [2021-11-09 10:42:58,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:58,969 INFO L354 Elim1Store]: treesize reduction 65, result has 16.7 percent of original size [2021-11-09 10:42:58,970 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 96 treesize of output 85 [2021-11-09 10:42:58,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:42:58,981 INFO L354 Elim1Store]: treesize reduction 59, result has 15.7 percent of original size [2021-11-09 10:42:58,981 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 92 treesize of output 89 [2021-11-09 10:42:59,227 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-09 10:42:59,227 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 20 treesize of output 22 [2021-11-09 10:42:59,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-09 10:42:59,339 INFO L354 Elim1Store]: treesize reduction 79, result has 14.1 percent of original size [2021-11-09 10:42:59,340 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 103 treesize of output 95 [2021-11-09 10:42:59,352 INFO L354 Elim1Store]: treesize reduction 69, result has 13.8 percent of original size [2021-11-09 10:42:59,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 99 [2021-11-09 10:42:59,499 INFO L354 Elim1Store]: treesize reduction 128, result has 22.4 percent of original size [2021-11-09 10:42:59,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 179 treesize of output 125 [2021-11-09 10:42:59,534 INFO L354 Elim1Store]: treesize reduction 112, result has 26.8 percent of original size [2021-11-09 10:42:59,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 150 treesize of output 149 [2021-11-09 10:43:00,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:00,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:43:00,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:00,140 INFO L354 Elim1Store]: treesize reduction 134, result has 13.5 percent of original size [2021-11-09 10:43:00,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 178 treesize of output 156 [2021-11-09 10:43:00,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:00,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:00,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:43:00,165 INFO L354 Elim1Store]: treesize reduction 132, result has 14.8 percent of original size [2021-11-09 10:43:00,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 174 treesize of output 172 [2021-11-09 10:43:06,463 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:43:06,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:43:06,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-09 10:43:06,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019790219] [2021-11-09 10:43:06,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 10:43:06,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:06,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 10:43:06,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-11-09 10:43:06,465 INFO L87 Difference]: Start difference. First operand 152 states and 167 transitions. Second operand has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 10:43:07,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:07,924 INFO L93 Difference]: Finished difference Result 197 states and 213 transitions. [2021-11-09 10:43:07,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 10:43:07,925 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 10:43:07,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:07,926 INFO L225 Difference]: With dead ends: 197 [2021-11-09 10:43:07,926 INFO L226 Difference]: Without dead ends: 197 [2021-11-09 10:43:07,927 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 10:43:07,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-09 10:43:07,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 165. [2021-11-09 10:43:07,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 151 states have (on average 1.2119205298013245) internal successors, (183), 161 states have internal predecessors, (183), 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 10:43:07,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 186 transitions. [2021-11-09 10:43:07,940 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 186 transitions. Word has length 46 [2021-11-09 10:43:07,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:07,940 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 186 transitions. [2021-11-09 10:43:07,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 10:43:07,941 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 186 transitions. [2021-11-09 10:43:07,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 10:43:07,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:07,942 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:07,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:08,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:08,157 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr22ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:43:08,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:08,158 INFO L85 PathProgramCache]: Analyzing trace with hash -795507602, now seen corresponding path program 1 times [2021-11-09 10:43:08,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:08,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081176089] [2021-11-09 10:43:08,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:08,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:08,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:43:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:08,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:08,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081176089] [2021-11-09 10:43:08,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081176089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:08,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806761420] [2021-11-09 10:43:08,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:08,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:08,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:08,533 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:08,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 10:43:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:09,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 10:43:09,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:09,280 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 10:43:09,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-09 10:43:09,408 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-09 10:43:09,408 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 28 treesize of output 45 [2021-11-09 10:43:09,473 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 33 treesize of output 26 [2021-11-09 10:43:09,487 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 10:43:09,571 INFO L354 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2021-11-09 10:43:09,572 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 105 treesize of output 72 [2021-11-09 10:43:09,584 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-09 10:43:09,584 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 97 treesize of output 83 [2021-11-09 10:43:09,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:09,750 INFO L354 Elim1Store]: treesize reduction 148, result has 15.4 percent of original size [2021-11-09 10:43:09,751 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 117 treesize of output 95 [2021-11-09 10:43:09,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:09,761 INFO L354 Elim1Store]: treesize reduction 59, result has 15.7 percent of original size [2021-11-09 10:43:09,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 113 treesize of output 106 [2021-11-09 10:43:10,059 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-11-09 10:43:10,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 73 [2021-11-09 10:43:10,376 INFO L354 Elim1Store]: treesize reduction 122, result has 17.0 percent of original size [2021-11-09 10:43:10,376 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 91 treesize of output 94 [2021-11-09 10:43:10,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~y~0.base] [2021-11-09 10:43:10,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:43:10,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-09 10:43:10,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160136379] [2021-11-09 10:43:10,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 10:43:10,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:10,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 10:43:10,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-11-09 10:43:10,468 INFO L87 Difference]: Start difference. First operand 165 states and 186 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 10:43:11,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:11,750 INFO L93 Difference]: Finished difference Result 170 states and 191 transitions. [2021-11-09 10:43:11,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 10:43:11,751 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 10:43:11,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:11,752 INFO L225 Difference]: With dead ends: 170 [2021-11-09 10:43:11,752 INFO L226 Difference]: Without dead ends: 170 [2021-11-09 10:43:11,753 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=375, Invalid=2075, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 10:43:11,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-09 10:43:11,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2021-11-09 10:43:11,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 155 states have (on average 1.206451612903226) internal successors, (187), 165 states have internal predecessors, (187), 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 10:43:11,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 190 transitions. [2021-11-09 10:43:11,758 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 190 transitions. Word has length 46 [2021-11-09 10:43:11,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:11,759 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 190 transitions. [2021-11-09 10:43:11,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 10:43:11,759 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 190 transitions. [2021-11-09 10:43:11,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 10:43:11,760 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:11,760 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 10:43:11,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:11,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:11,981 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:43:11,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:11,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1108576001, now seen corresponding path program 3 times [2021-11-09 10:43:11,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:11,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861991591] [2021-11-09 10:43:11,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:11,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:12,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:43:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:12,261 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:12,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:12,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861991591] [2021-11-09 10:43:12,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861991591] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:12,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498903922] [2021-11-09 10:43:12,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:43:12,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:12,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:12,263 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:12,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 10:43:13,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 10:43:13,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:13,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 10:43:13,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:13,088 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 10:43:13,139 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:43:13,139 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 10:43:13,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 10:43:13,225 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 10:43:13,225 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 47 treesize of output 33 [2021-11-09 10:43:13,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:13,329 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-11-09 10:43:13,329 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 52 treesize of output 45 [2021-11-09 10:43:13,378 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:43:13,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:43:13,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-09 10:43:13,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113536726] [2021-11-09 10:43:13,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 10:43:13,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:13,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 10:43:13,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-11-09 10:43:13,379 INFO L87 Difference]: Start difference. First operand 169 states and 190 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 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 10:43:14,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:14,191 INFO L93 Difference]: Finished difference Result 199 states and 215 transitions. [2021-11-09 10:43:14,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 10:43:14,191 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 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 47 [2021-11-09 10:43:14,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:14,192 INFO L225 Difference]: With dead ends: 199 [2021-11-09 10:43:14,192 INFO L226 Difference]: Without dead ends: 199 [2021-11-09 10:43:14,193 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=323, Invalid=1317, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 10:43:14,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-09 10:43:14,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 169. [2021-11-09 10:43:14,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 155 states have (on average 1.1935483870967742) internal successors, (185), 165 states have internal predecessors, (185), 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 10:43:14,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 188 transitions. [2021-11-09 10:43:14,197 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 188 transitions. Word has length 47 [2021-11-09 10:43:14,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:14,198 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 188 transitions. [2021-11-09 10:43:14,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 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 10:43:14,198 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 188 transitions. [2021-11-09 10:43:14,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 10:43:14,199 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:14,199 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:14,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:14,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:14,421 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr25ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:43:14,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:14,422 INFO L85 PathProgramCache]: Analyzing trace with hash 662688365, now seen corresponding path program 1 times [2021-11-09 10:43:14,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:14,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879639613] [2021-11-09 10:43:14,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:14,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:14,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:14,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:43:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:14,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:14,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879639613] [2021-11-09 10:43:14,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879639613] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:14,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736466447] [2021-11-09 10:43:14,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:14,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:14,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:14,844 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:14,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 10:43:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:15,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 10:43:15,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:15,659 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 10:43:15,686 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:43:15,686 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 10:43:15,724 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 10:43:15,824 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:43:15,825 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 10:43:15,863 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 10:43:15,928 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-09 10:43:15,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 39 [2021-11-09 10:43:16,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:43:16,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:16,056 INFO L354 Elim1Store]: treesize reduction 74, result has 18.7 percent of original size [2021-11-09 10:43:16,056 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 51 treesize of output 47 [2021-11-09 10:43:16,096 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:43:16,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:43:16,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-09 10:43:16,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424111071] [2021-11-09 10:43:16,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 10:43:16,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:16,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 10:43:16,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-11-09 10:43:16,101 INFO L87 Difference]: Start difference. First operand 169 states and 188 transitions. Second operand has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:43:17,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:17,351 INFO L93 Difference]: Finished difference Result 187 states and 203 transitions. [2021-11-09 10:43:17,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-09 10:43:17,352 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-11-09 10:43:17,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:17,353 INFO L225 Difference]: With dead ends: 187 [2021-11-09 10:43:17,353 INFO L226 Difference]: Without dead ends: 187 [2021-11-09 10:43:17,355 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=584, Invalid=2608, Unknown=0, NotChecked=0, Total=3192 [2021-11-09 10:43:17,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-09 10:43:17,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 166. [2021-11-09 10:43:17,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 152 states have (on average 1.1907894736842106) internal successors, (181), 162 states have internal predecessors, (181), 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 10:43:17,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 184 transitions. [2021-11-09 10:43:17,361 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 184 transitions. Word has length 49 [2021-11-09 10:43:17,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:17,361 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 184 transitions. [2021-11-09 10:43:17,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:43:17,362 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 184 transitions. [2021-11-09 10:43:17,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 10:43:17,365 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:17,365 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:17,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:17,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:17,581 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr24ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:43:17,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:17,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1570264811, now seen corresponding path program 2 times [2021-11-09 10:43:17,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:17,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205826110] [2021-11-09 10:43:17,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:17,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:17,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:43:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:17,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:17,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205826110] [2021-11-09 10:43:17,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205826110] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:17,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078650247] [2021-11-09 10:43:17,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:43:17,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:17,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:17,953 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:17,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 10:43:19,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:43:19,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:19,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 10:43:19,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:19,052 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 10:43:19,122 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:43:19,122 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 10:43:19,169 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 10:43:19,215 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 10:43:19,215 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 48 treesize of output 34 [2021-11-09 10:43:19,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:19,313 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-11-09 10:43:19,313 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 53 treesize of output 46 [2021-11-09 10:43:19,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:43:19,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:43:19,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-09 10:43:19,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243982272] [2021-11-09 10:43:19,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 10:43:19,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:19,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 10:43:19,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-11-09 10:43:19,366 INFO L87 Difference]: Start difference. First operand 166 states and 184 transitions. Second operand has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 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 10:43:20,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:20,434 INFO L93 Difference]: Finished difference Result 191 states and 206 transitions. [2021-11-09 10:43:20,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 10:43:20,434 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 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 51 [2021-11-09 10:43:20,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:20,436 INFO L225 Difference]: With dead ends: 191 [2021-11-09 10:43:20,436 INFO L226 Difference]: Without dead ends: 191 [2021-11-09 10:43:20,436 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=323, Invalid=1317, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 10:43:20,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-09 10:43:20,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 168. [2021-11-09 10:43:20,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 154 states have (on average 1.1883116883116882) internal successors, (183), 164 states have internal predecessors, (183), 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 10:43:20,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 186 transitions. [2021-11-09 10:43:20,441 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 186 transitions. Word has length 51 [2021-11-09 10:43:20,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:20,442 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 186 transitions. [2021-11-09 10:43:20,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 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 10:43:20,442 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 186 transitions. [2021-11-09 10:43:20,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 10:43:20,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:20,443 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-09 10:43:20,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:20,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 10:43:20,643 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr20ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:43:20,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:20,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1570275796, now seen corresponding path program 2 times [2021-11-09 10:43:20,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:20,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895443219] [2021-11-09 10:43:20,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:20,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:21,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:43:21,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:21,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:21,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895443219] [2021-11-09 10:43:21,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895443219] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:21,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288765743] [2021-11-09 10:43:21,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:43:21,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:21,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:21,433 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:21,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 10:43:22,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:43:22,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:22,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-09 10:43:22,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:22,602 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 10:43:22,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 10:43:22,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 10:43:22,678 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:43:22,679 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 10:43:22,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:43:22,742 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 10:43:22,825 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-09 10:43:22,825 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 74 [2021-11-09 10:43:22,839 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-09 10:43:22,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 86 [2021-11-09 10:43:22,980 INFO L354 Elim1Store]: treesize reduction 88, result has 20.7 percent of original size [2021-11-09 10:43:22,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 107 treesize of output 107 [2021-11-09 10:43:22,990 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 10:43:22,990 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 4 new quantified variables, introduced 4 case distinctions, treesize of input 91 treesize of output 75 [2021-11-09 10:43:23,191 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-09 10:43:23,192 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 20 treesize of output 22 [2021-11-09 10:43:23,280 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 10:43:23,281 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 5 case distinctions, treesize of input 108 treesize of output 95 [2021-11-09 10:43:23,286 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:43:23,287 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 5 case distinctions, treesize of input 104 treesize of output 112 [2021-11-09 10:43:23,435 INFO L354 Elim1Store]: treesize reduction 162, result has 25.0 percent of original size [2021-11-09 10:43:23,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 188 treesize of output 135 [2021-11-09 10:43:23,494 INFO L354 Elim1Store]: treesize reduction 156, result has 23.5 percent of original size [2021-11-09 10:43:23,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 153 treesize of output 155 [2021-11-09 10:43:24,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:24,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:43:24,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:24,205 INFO L354 Elim1Store]: treesize reduction 178, result has 14.4 percent of original size [2021-11-09 10:43:24,205 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 18 case distinctions, treesize of input 181 treesize of output 182 [2021-11-09 10:43:24,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:24,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:43:24,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:24,249 INFO L354 Elim1Store]: treesize reduction 176, result has 13.7 percent of original size [2021-11-09 10:43:24,249 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 18 case distinctions, treesize of input 177 treesize of output 162 [2021-11-09 10:43:27,177 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 186 treesize of output 185 [2021-11-09 10:43:28,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~y~0.base, main_~list~0.offset] [2021-11-09 10:43:28,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:43:28,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-09 10:43:28,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429268315] [2021-11-09 10:43:28,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 10:43:28,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:28,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 10:43:28,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1152, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 10:43:28,396 INFO L87 Difference]: Start difference. First operand 168 states and 186 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 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 10:43:34,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:34,559 INFO L93 Difference]: Finished difference Result 312 states and 339 transitions. [2021-11-09 10:43:34,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-09 10:43:34,559 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 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 51 [2021-11-09 10:43:34,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:34,562 INFO L225 Difference]: With dead ends: 312 [2021-11-09 10:43:34,562 INFO L226 Difference]: Without dead ends: 312 [2021-11-09 10:43:34,565 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2046 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=937, Invalid=6719, Unknown=0, NotChecked=0, Total=7656 [2021-11-09 10:43:34,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-09 10:43:34,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 275. [2021-11-09 10:43:34,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 261 states have (on average 1.1494252873563218) internal successors, (300), 271 states have internal predecessors, (300), 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 10:43:34,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 303 transitions. [2021-11-09 10:43:34,573 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 303 transitions. Word has length 51 [2021-11-09 10:43:34,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:34,574 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 303 transitions. [2021-11-09 10:43:34,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 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 10:43:34,574 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 303 transitions. [2021-11-09 10:43:34,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 10:43:34,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:34,575 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] [2021-11-09 10:43:34,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:34,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-09 10:43:34,793 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:43:34,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:34,794 INFO L85 PathProgramCache]: Analyzing trace with hash 374834246, now seen corresponding path program 1 times [2021-11-09 10:43:34,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:34,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848223442] [2021-11-09 10:43:34,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:34,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:35,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:43:35,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:35,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:35,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848223442] [2021-11-09 10:43:35,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848223442] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:35,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769606144] [2021-11-09 10:43:35,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:35,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:35,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:35,545 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:35,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 10:43:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:36,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-09 10:43:36,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:36,703 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 10:43:36,752 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:43:36,752 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 10:43:36,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 10:43:36,845 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 10:43:36,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-09 10:43:36,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:36,956 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-11-09 10:43:36,957 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 44 treesize of output 41 [2021-11-09 10:43:37,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:43:37,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:43:37,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-09 10:43:37,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000228626] [2021-11-09 10:43:37,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 10:43:37,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:37,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 10:43:37,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-11-09 10:43:37,018 INFO L87 Difference]: Start difference. First operand 275 states and 303 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 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 10:43:39,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:39,713 INFO L93 Difference]: Finished difference Result 304 states and 333 transitions. [2021-11-09 10:43:39,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 10:43:39,714 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 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 51 [2021-11-09 10:43:39,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:39,715 INFO L225 Difference]: With dead ends: 304 [2021-11-09 10:43:39,715 INFO L226 Difference]: Without dead ends: 304 [2021-11-09 10:43:39,716 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=631, Invalid=2231, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 10:43:39,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-09 10:43:39,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 259. [2021-11-09 10:43:39,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 245 states have (on average 1.1591836734693877) internal successors, (284), 255 states have internal predecessors, (284), 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 10:43:39,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 287 transitions. [2021-11-09 10:43:39,724 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 287 transitions. Word has length 51 [2021-11-09 10:43:39,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:39,724 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 287 transitions. [2021-11-09 10:43:39,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 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 10:43:39,725 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 287 transitions. [2021-11-09 10:43:39,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 10:43:39,726 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:39,726 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] [2021-11-09 10:43:39,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:39,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:39,949 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:43:39,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:39,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1188362064, now seen corresponding path program 2 times [2021-11-09 10:43:39,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:39,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231565829] [2021-11-09 10:43:39,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:39,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:40,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:43:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:40,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:40,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231565829] [2021-11-09 10:43:40,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231565829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:40,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299667907] [2021-11-09 10:43:40,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:43:40,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:40,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:40,734 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:40,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 10:43:41,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:43:41,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:41,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-09 10:43:41,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:41,795 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 10:43:41,836 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:43:41,837 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 10:43:41,850 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 10:43:41,873 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 10:43:41,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 51 [2021-11-09 10:43:41,958 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 10:43:41,958 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 21 treesize of output 29 [2021-11-09 10:43:42,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:42,055 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-11-09 10:43:42,056 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 57 treesize of output 50 [2021-11-09 10:43:42,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:43:42,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:43:42,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-09 10:43:42,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28744983] [2021-11-09 10:43:42,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 10:43:42,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:42,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 10:43:42,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-11-09 10:43:42,159 INFO L87 Difference]: Start difference. First operand 259 states and 287 transitions. Second operand has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 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 10:43:45,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:45,182 INFO L93 Difference]: Finished difference Result 313 states and 343 transitions. [2021-11-09 10:43:45,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 10:43:45,183 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 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 51 [2021-11-09 10:43:45,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:45,184 INFO L225 Difference]: With dead ends: 313 [2021-11-09 10:43:45,185 INFO L226 Difference]: Without dead ends: 313 [2021-11-09 10:43:45,186 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=695, Invalid=2965, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 10:43:45,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-09 10:43:45,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 259. [2021-11-09 10:43:45,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 245 states have (on average 1.1591836734693877) internal successors, (284), 255 states have internal predecessors, (284), 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 10:43:45,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 287 transitions. [2021-11-09 10:43:45,193 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 287 transitions. Word has length 51 [2021-11-09 10:43:45,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:45,193 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 287 transitions. [2021-11-09 10:43:45,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 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 10:43:45,194 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 287 transitions. [2021-11-09 10:43:45,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 10:43:45,195 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:45,195 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:45,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:45,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-09 10:43:45,409 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr22ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:43:45,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:45,410 INFO L85 PathProgramCache]: Analyzing trace with hash 70250906, now seen corresponding path program 1 times [2021-11-09 10:43:45,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:45,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442695563] [2021-11-09 10:43:45,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:45,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:46,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:43:46,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:46,041 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 10:43:46,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:46,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442695563] [2021-11-09 10:43:46,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442695563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:46,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503481662] [2021-11-09 10:43:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:46,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:46,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:46,049 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:46,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 10:43:47,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:47,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 10:43:47,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:47,114 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 10:43:47,134 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 19 treesize of output 15 [2021-11-09 10:43:47,214 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-09 10:43:47,214 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 28 treesize of output 45 [2021-11-09 10:43:47,265 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 10:43:47,273 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 33 treesize of output 26 [2021-11-09 10:43:47,346 INFO L354 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2021-11-09 10:43:47,347 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 105 treesize of output 72 [2021-11-09 10:43:47,355 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-09 10:43:47,356 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 97 treesize of output 83 [2021-11-09 10:43:47,488 INFO L354 Elim1Store]: treesize reduction 134, result has 32.3 percent of original size [2021-11-09 10:43:47,489 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 45 treesize of output 81 [2021-11-09 10:43:47,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:47,622 INFO L354 Elim1Store]: treesize reduction 148, result has 15.4 percent of original size [2021-11-09 10:43:47,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 150 treesize of output 110 [2021-11-09 10:43:47,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:47,637 INFO L354 Elim1Store]: treesize reduction 57, result has 16.2 percent of original size [2021-11-09 10:43:47,637 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 161 treesize of output 150 [2021-11-09 10:43:48,028 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-09 10:43:48,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 88 [2021-11-09 10:43:48,592 INFO L354 Elim1Store]: treesize reduction 122, result has 44.3 percent of original size [2021-11-09 10:43:48,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 120 [2021-11-09 10:43:48,894 INFO L354 Elim1Store]: treesize reduction 190, result has 18.1 percent of original size [2021-11-09 10:43:48,894 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 93 treesize of output 107 [2021-11-09 10:43:48,995 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~y~0.base] [2021-11-09 10:43:48,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:43:48,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-09 10:43:48,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967577147] [2021-11-09 10:43:48,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 10:43:48,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:48,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 10:43:48,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1280, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 10:43:48,997 INFO L87 Difference]: Start difference. First operand 259 states and 287 transitions. Second operand has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 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 10:43:50,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:50,457 INFO L93 Difference]: Finished difference Result 273 states and 299 transitions. [2021-11-09 10:43:50,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 10:43:50,459 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 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 51 [2021-11-09 10:43:50,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:50,460 INFO L225 Difference]: With dead ends: 273 [2021-11-09 10:43:50,460 INFO L226 Difference]: Without dead ends: 273 [2021-11-09 10:43:50,460 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=426, Invalid=2766, Unknown=0, NotChecked=0, Total=3192 [2021-11-09 10:43:50,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-09 10:43:50,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 259. [2021-11-09 10:43:50,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 245 states have (on average 1.1510204081632653) internal successors, (282), 255 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 10:43:50,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 285 transitions. [2021-11-09 10:43:50,466 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 285 transitions. Word has length 51 [2021-11-09 10:43:50,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:50,467 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 285 transitions. [2021-11-09 10:43:50,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 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 10:43:50,467 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 285 transitions. [2021-11-09 10:43:50,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 10:43:50,468 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:50,468 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:50,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:50,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-09 10:43:50,681 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:43:50,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:50,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1024926763, now seen corresponding path program 4 times [2021-11-09 10:43:50,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:50,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127073554] [2021-11-09 10:43:50,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:50,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:50,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:51,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:43:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:51,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:51,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127073554] [2021-11-09 10:43:51,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127073554] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:51,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129780255] [2021-11-09 10:43:51,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:43:51,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:51,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:51,321 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:51,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 10:43:52,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:43:52,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:52,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-09 10:43:52,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:52,593 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 10:43:52,623 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 10:43:52,628 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 10:43:52,646 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-09 10:43:52,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:52,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:52,650 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 10:43:52,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-09 10:43:52,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:52,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:52,660 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 10:43:52,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:52,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:52,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:52,710 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 32 [2021-11-09 10:43:52,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:52,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:52,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:52,724 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 32 treesize of output 34 [2021-11-09 10:43:52,910 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:43:52,910 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 10:43:52,994 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 33 treesize of output 38 [2021-11-09 10:43:53,011 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 33 treesize of output 38 [2021-11-09 10:43:53,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:53,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:43:53,116 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 10:43:53,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 89 [2021-11-09 10:43:53,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:53,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:53,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:43:53,126 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:43:53,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 114 treesize of output 107 [2021-11-09 10:43:53,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:53,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:53,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:53,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:43:53,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:53,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:43:53,356 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 10:43:53,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 123 treesize of output 102 [2021-11-09 10:43:53,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:53,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:43:53,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:53,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:53,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:43:53,371 INFO L354 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2021-11-09 10:43:53,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 119 treesize of output 127 [2021-11-09 10:43:53,687 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-09 10:43:53,687 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 20 treesize of output 22 [2021-11-09 10:43:53,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:53,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:53,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:43:53,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:53,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:53,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:53,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:43:53,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:43:53,818 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-09 10:43:53,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 136 treesize of output 118 [2021-11-09 10:43:53,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:53,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:43:53,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:53,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:53,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:43:53,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:53,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:43:53,835 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-09 10:43:53,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 132 treesize of output 143 [2021-11-09 10:43:53,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:43:53,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:54,061 INFO L354 Elim1Store]: treesize reduction 392, result has 11.9 percent of original size [2021-11-09 10:43:54,061 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 21 case distinctions, treesize of input 294 treesize of output 178 [2021-11-09 10:43:54,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:43:54,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:54,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:54,126 INFO L354 Elim1Store]: treesize reduction 312, result has 14.0 percent of original size [2021-11-09 10:43:54,127 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 10 new quantified variables, introduced 21 case distinctions, treesize of input 286 treesize of output 224 [2021-11-09 10:43:54,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:43:54,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:54,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:54,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:54,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:54,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:43:54,466 INFO L354 Elim1Store]: treesize reduction 420, result has 9.7 percent of original size [2021-11-09 10:43:54,467 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 9 new quantified variables, introduced 25 case distinctions, treesize of input 265 treesize of output 200 [2021-11-09 10:43:54,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:54,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:43:54,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:54,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:54,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:43:54,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:43:54,526 INFO L354 Elim1Store]: treesize reduction 368, result has 10.0 percent of original size [2021-11-09 10:43:54,527 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 10 new quantified variables, introduced 25 case distinctions, treesize of input 201 treesize of output 191 [2021-11-09 10:43:56,006 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 297 treesize of output 296 [2021-11-09 10:43:56,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~y~0.base, main_~list~0.offset] [2021-11-09 10:43:56,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:43:56,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-09 10:43:56,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050431208] [2021-11-09 10:43:56,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 10:43:56,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:56,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 10:43:56,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1421, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 10:43:56,260 INFO L87 Difference]: Start difference. First operand 259 states and 285 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:43:58,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:58,188 INFO L93 Difference]: Finished difference Result 367 states and 401 transitions. [2021-11-09 10:43:58,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 10:43:58,188 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-11-09 10:43:58,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:58,191 INFO L225 Difference]: With dead ends: 367 [2021-11-09 10:43:58,191 INFO L226 Difference]: Without dead ends: 367 [2021-11-09 10:43:58,191 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=252, Invalid=2940, Unknown=0, NotChecked=0, Total=3192 [2021-11-09 10:43:58,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-11-09 10:43:58,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 362. [2021-11-09 10:43:58,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 348 states have (on average 1.132183908045977) internal successors, (394), 358 states have internal predecessors, (394), 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 10:43:58,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 397 transitions. [2021-11-09 10:43:58,200 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 397 transitions. Word has length 54 [2021-11-09 10:43:58,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:58,200 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 397 transitions. [2021-11-09 10:43:58,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:43:58,200 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 397 transitions. [2021-11-09 10:43:58,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 10:43:58,202 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:58,202 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:58,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:58,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 10:43:58,429 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:43:58,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:58,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1707957690, now seen corresponding path program 4 times [2021-11-09 10:43:58,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:58,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392656477] [2021-11-09 10:43:58,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:58,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:59,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:43:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:59,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:59,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392656477] [2021-11-09 10:43:59,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392656477] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:59,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081375468] [2021-11-09 10:43:59,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:43:59,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:59,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:59,285 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:59,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 10:44:00,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:44:00,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:00,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-09 10:44:00,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:00,717 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 10:44:00,782 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 10:44:00,783 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 62 treesize of output 48 [2021-11-09 10:44:00,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:44:00,924 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-11-09 10:44:00,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 60 [2021-11-09 10:44:00,995 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:44:00,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:44:00,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-09 10:44:00,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687577081] [2021-11-09 10:44:00,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 10:44:00,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:00,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 10:44:00,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-11-09 10:44:00,996 INFO L87 Difference]: Start difference. First operand 362 states and 397 transitions. Second operand has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 10:44:02,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:02,224 INFO L93 Difference]: Finished difference Result 384 states and 418 transitions. [2021-11-09 10:44:02,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 10:44:02,224 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 10:44:02,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:02,226 INFO L225 Difference]: With dead ends: 384 [2021-11-09 10:44:02,226 INFO L226 Difference]: Without dead ends: 357 [2021-11-09 10:44:02,226 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=151, Invalid=1571, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 10:44:02,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-11-09 10:44:02,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 357. [2021-11-09 10:44:02,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 343 states have (on average 1.131195335276968) internal successors, (388), 353 states have internal predecessors, (388), 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 10:44:02,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 391 transitions. [2021-11-09 10:44:02,233 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 391 transitions. Word has length 55 [2021-11-09 10:44:02,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:02,234 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 391 transitions. [2021-11-09 10:44:02,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 10:44:02,234 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 391 transitions. [2021-11-09 10:44:02,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-09 10:44:02,235 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:02,236 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:02,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:02,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 10:44:02,457 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:44:02,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:02,458 INFO L85 PathProgramCache]: Analyzing trace with hash 992902771, now seen corresponding path program 1 times [2021-11-09 10:44:02,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:02,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019198490] [2021-11-09 10:44:02,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:02,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:02,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:44:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 10:44:02,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:02,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019198490] [2021-11-09 10:44:02,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019198490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:02,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85562649] [2021-11-09 10:44:02,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:02,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:02,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:02,745 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:02,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 10:44:03,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:03,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 10:44:03,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:03,948 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 10:44:03,976 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:44:03,976 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 10:44:03,987 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 10:44:04,046 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:44:04,046 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 10:44:04,073 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 10:44:04,120 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-09 10:44:04,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 39 [2021-11-09 10:44:04,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:44:04,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:44:04,241 INFO L354 Elim1Store]: treesize reduction 74, result has 18.7 percent of original size [2021-11-09 10:44:04,241 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 51 treesize of output 47 [2021-11-09 10:44:04,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:44:04,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:44:04,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-09 10:44:04,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254653700] [2021-11-09 10:44:04,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 10:44:04,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:04,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 10:44:04,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-11-09 10:44:04,277 INFO L87 Difference]: Start difference. First operand 357 states and 391 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:44:05,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:05,290 INFO L93 Difference]: Finished difference Result 380 states and 411 transitions. [2021-11-09 10:44:05,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 10:44:05,291 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-11-09 10:44:05,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:05,292 INFO L225 Difference]: With dead ends: 380 [2021-11-09 10:44:05,293 INFO L226 Difference]: Without dead ends: 377 [2021-11-09 10:44:05,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=510, Invalid=2246, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 10:44:05,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-11-09 10:44:05,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 357. [2021-11-09 10:44:05,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 343 states have (on average 1.1137026239067056) internal successors, (382), 353 states have internal predecessors, (382), 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 10:44:05,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 385 transitions. [2021-11-09 10:44:05,300 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 385 transitions. Word has length 56 [2021-11-09 10:44:05,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:05,300 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 385 transitions. [2021-11-09 10:44:05,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:44:05,300 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 385 transitions. [2021-11-09 10:44:05,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-09 10:44:05,302 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:05,302 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:05,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:05,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:05,517 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:44:05,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:05,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1899240028, now seen corresponding path program 2 times [2021-11-09 10:44:05,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:05,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772426811] [2021-11-09 10:44:05,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:05,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:06,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:44:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:06,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:06,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772426811] [2021-11-09 10:44:06,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772426811] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:06,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944296401] [2021-11-09 10:44:06,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:44:06,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:06,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:06,465 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:06,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 10:44:07,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:44:07,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:07,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-09 10:44:07,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:07,690 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 10:44:07,729 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:44:07,729 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 10:44:07,738 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 10:44:07,763 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 10:44:07,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 51 [2021-11-09 10:44:07,850 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 10:44:07,851 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 21 treesize of output 29 [2021-11-09 10:44:07,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:44:07,924 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-11-09 10:44:07,924 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 57 treesize of output 50 [2021-11-09 10:44:08,011 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:44:08,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:44:08,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-09 10:44:08,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707575989] [2021-11-09 10:44:08,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 10:44:08,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:08,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 10:44:08,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 10:44:08,013 INFO L87 Difference]: Start difference. First operand 357 states and 385 transitions. Second operand has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 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 10:44:11,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:11,549 INFO L93 Difference]: Finished difference Result 377 states and 402 transitions. [2021-11-09 10:44:11,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-09 10:44:11,550 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 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 56 [2021-11-09 10:44:11,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:11,551 INFO L225 Difference]: With dead ends: 377 [2021-11-09 10:44:11,552 INFO L226 Difference]: Without dead ends: 377 [2021-11-09 10:44:11,552 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=788, Invalid=3502, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 10:44:11,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-11-09 10:44:11,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 306. [2021-11-09 10:44:11,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 292 states have (on average 1.1232876712328768) internal successors, (328), 302 states have internal predecessors, (328), 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 10:44:11,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 331 transitions. [2021-11-09 10:44:11,559 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 331 transitions. Word has length 56 [2021-11-09 10:44:11,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:11,560 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 331 transitions. [2021-11-09 10:44:11,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 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 10:44:11,560 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 331 transitions. [2021-11-09 10:44:11,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 10:44:11,561 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:11,561 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:44:11,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:11,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:11,778 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:44:11,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:11,779 INFO L85 PathProgramCache]: Analyzing trace with hash -139462216, now seen corresponding path program 1 times [2021-11-09 10:44:11,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:11,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857883583] [2021-11-09 10:44:11,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:11,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:13,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:44:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:13,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:13,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857883583] [2021-11-09 10:44:13,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857883583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:13,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019404454] [2021-11-09 10:44:13,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:13,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:13,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:13,657 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:13,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 10:44:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:14,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-09 10:44:14,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:15,009 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-09 10:44:15,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-11-09 10:44:15,071 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 10:44:15,142 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 10:44:15,142 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 48 treesize of output 34 [2021-11-09 10:44:15,298 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-09 10:44:15,298 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 51 treesize of output 44 [2021-11-09 10:44:15,520 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-09 10:44:15,521 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 10:44:15,634 INFO L354 Elim1Store]: treesize reduction 59, result has 13.2 percent of original size [2021-11-09 10:44:15,634 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 66 treesize of output 58 [2021-11-09 10:44:15,790 INFO L354 Elim1Store]: treesize reduction 138, result has 24.6 percent of original size [2021-11-09 10:44:15,791 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 130 treesize of output 94 [2021-11-09 10:44:16,425 INFO L354 Elim1Store]: treesize reduction 86, result has 29.5 percent of original size [2021-11-09 10:44:16,426 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 110 treesize of output 132 [2021-11-09 10:44:16,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:44:16,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:44:16,940 INFO L354 Elim1Store]: treesize reduction 184, result has 12.4 percent of original size [2021-11-09 10:44:16,940 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 145 treesize of output 123 [2021-11-09 10:44:17,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:44:17,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:44:17,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-09 10:44:17,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303174344] [2021-11-09 10:44:17,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 10:44:17,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:17,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 10:44:17,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1613, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 10:44:17,660 INFO L87 Difference]: Start difference. First operand 306 states and 331 transitions. Second operand has 31 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 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 10:44:20,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:20,165 INFO L93 Difference]: Finished difference Result 320 states and 344 transitions. [2021-11-09 10:44:20,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 10:44:20,166 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 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 60 [2021-11-09 10:44:20,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:20,167 INFO L225 Difference]: With dead ends: 320 [2021-11-09 10:44:20,167 INFO L226 Difference]: Without dead ends: 289 [2021-11-09 10:44:20,168 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=221, Invalid=3319, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 10:44:20,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-11-09 10:44:20,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2021-11-09 10:44:20,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 275 states have (on average 1.1272727272727272) internal successors, (310), 285 states have internal predecessors, (310), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:44:20,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 313 transitions. [2021-11-09 10:44:20,172 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 313 transitions. Word has length 60 [2021-11-09 10:44:20,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:20,173 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 313 transitions. [2021-11-09 10:44:20,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 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 10:44:20,173 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 313 transitions. [2021-11-09 10:44:20,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 10:44:20,174 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:20,174 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:44:20,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-09 10:44:20,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-09 10:44:20,401 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:44:20,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:20,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1937616402, now seen corresponding path program 2 times [2021-11-09 10:44:20,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:20,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993395306] [2021-11-09 10:44:20,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:20,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:23,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:44:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:23,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:23,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993395306] [2021-11-09 10:44:23,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993395306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:23,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223246520] [2021-11-09 10:44:23,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:44:23,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:23,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:23,049 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:23,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 10:44:24,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:44:24,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:24,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-09 10:44:24,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:24,524 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 10:44:24,595 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 10:44:24,595 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 65 treesize of output 47 [2021-11-09 10:44:24,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:44:24,810 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-11-09 10:44:24,810 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 83 treesize of output 72 [2021-11-09 10:44:24,927 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:44:24,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:44:24,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-11-09 10:44:24,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101647139] [2021-11-09 10:44:24,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 10:44:24,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:24,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 10:44:24,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1516, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 10:44:24,928 INFO L87 Difference]: Start difference. First operand 289 states and 313 transitions. Second operand has 34 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 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 10:44:29,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:29,107 INFO L93 Difference]: Finished difference Result 317 states and 340 transitions. [2021-11-09 10:44:29,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 10:44:29,108 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 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 60 [2021-11-09 10:44:29,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:29,109 INFO L225 Difference]: With dead ends: 317 [2021-11-09 10:44:29,109 INFO L226 Difference]: Without dead ends: 286 [2021-11-09 10:44:29,110 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=372, Invalid=3918, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 10:44:29,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-09 10:44:29,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2021-11-09 10:44:29,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 270 states have (on average 1.125925925925926) internal successors, (304), 280 states have internal predecessors, (304), 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 10:44:29,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 307 transitions. [2021-11-09 10:44:29,115 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 307 transitions. Word has length 60 [2021-11-09 10:44:29,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:29,116 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 307 transitions. [2021-11-09 10:44:29,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 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 10:44:29,116 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 307 transitions. [2021-11-09 10:44:29,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 10:44:29,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:29,117 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:44:29,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-09 10:44:29,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:29,345 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting mainErr20ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:44:29,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:29,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1115912304, now seen corresponding path program 2 times [2021-11-09 10:44:29,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:29,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511864864] [2021-11-09 10:44:29,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:29,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:29,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:44:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:29,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:29,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511864864] [2021-11-09 10:44:29,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511864864] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:29,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708488417] [2021-11-09 10:44:29,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:44:29,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:29,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:29,993 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:30,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 10:44:31,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:44:31,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:31,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-09 10:44:31,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:31,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 10:44:31,441 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:44:31,441 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 10:44:31,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:44:31,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 10:44:31,568 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-09 10:44:31,568 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 86 treesize of output 64 [2021-11-09 10:44:31,583 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-09 10:44:31,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 71 [2021-11-09 10:44:31,719 INFO L354 Elim1Store]: treesize reduction 88, result has 20.7 percent of original size [2021-11-09 10:44:31,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 92 treesize of output 92 [2021-11-09 10:44:31,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:44:31,723 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 65 [2021-11-09 10:44:31,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:44:31,894 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-09 10:44:31,894 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 20 treesize of output 22 [2021-11-09 10:44:31,963 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:44:31,963 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 5 case distinctions, treesize of input 85 treesize of output 93 [2021-11-09 10:44:31,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:44:31,968 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 77 [2021-11-09 10:44:32,111 INFO L354 Elim1Store]: treesize reduction 118, result has 28.5 percent of original size [2021-11-09 10:44:32,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 149 treesize of output 121 [2021-11-09 10:44:32,178 INFO L354 Elim1Store]: treesize reduction 148, result has 27.5 percent of original size [2021-11-09 10:44:32,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 138 treesize of output 148 [2021-11-09 10:44:32,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:44:32,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:44:32,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:44:32,508 INFO L354 Elim1Store]: treesize reduction 134, result has 13.5 percent of original size [2021-11-09 10:44:32,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 174 treesize of output 156 [2021-11-09 10:44:32,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:44:32,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:44:32,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:44:32,563 INFO L354 Elim1Store]: treesize reduction 178, result has 14.4 percent of original size [2021-11-09 10:44:32,563 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 18 case distinctions, treesize of input 170 treesize of output 171 [2021-11-09 10:44:35,350 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 175 treesize of output 174 [2021-11-09 10:44:36,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~y~0.base, main_~list~0.offset] [2021-11-09 10:44:36,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:44:36,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-09 10:44:36,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994716501] [2021-11-09 10:44:36,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 10:44:36,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:36,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 10:44:36,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 10:44:36,551 INFO L87 Difference]: Start difference. First operand 284 states and 307 transitions. Second operand has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 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 10:44:44,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:44,365 INFO L93 Difference]: Finished difference Result 338 states and 360 transitions. [2021-11-09 10:44:44,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-09 10:44:44,365 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 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 60 [2021-11-09 10:44:44,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:44,367 INFO L225 Difference]: With dead ends: 338 [2021-11-09 10:44:44,367 INFO L226 Difference]: Without dead ends: 338 [2021-11-09 10:44:44,368 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2706 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1272, Invalid=9030, Unknown=0, NotChecked=0, Total=10302 [2021-11-09 10:44:44,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-09 10:44:44,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 284. [2021-11-09 10:44:44,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 270 states have (on average 1.1222222222222222) internal successors, (303), 280 states have internal predecessors, (303), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:44:44,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 306 transitions. [2021-11-09 10:44:44,375 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 306 transitions. Word has length 60 [2021-11-09 10:44:44,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:44,375 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 306 transitions. [2021-11-09 10:44:44,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 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 10:44:44,375 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 306 transitions. [2021-11-09 10:44:44,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 10:44:44,376 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:44,376 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:44:44,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:44,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:44,585 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting mainErr21ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:44:44,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:44,587 INFO L85 PathProgramCache]: Analyzing trace with hash 233543170, now seen corresponding path program 2 times [2021-11-09 10:44:44,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:44,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896633249] [2021-11-09 10:44:44,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:44,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:45,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:44:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:45,185 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:45,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:45,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896633249] [2021-11-09 10:44:45,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896633249] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:45,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033533766] [2021-11-09 10:44:45,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:44:45,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:45,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:45,186 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:45,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 10:44:46,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:44:46,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:46,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-09 10:44:46,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:46,689 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 19 treesize of output 15 [2021-11-09 10:44:46,739 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:44:46,739 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 10:44:46,795 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 10:44:46,803 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 10:44:46,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:44:46,866 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 57 [2021-11-09 10:44:46,869 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 68 treesize of output 63 [2021-11-09 10:44:46,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:44:46,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:44:46,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:44:47,001 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 10:44:47,001 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 4 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 80 [2021-11-09 10:44:47,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:44:47,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:44:47,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:44:47,019 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 1 case distinctions, treesize of input 84 treesize of output 86 [2021-11-09 10:44:47,275 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-09 10:44:47,276 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 20 treesize of output 22 [2021-11-09 10:44:47,360 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 10:44:47,360 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 5 case distinctions, treesize of input 95 treesize of output 90 [2021-11-09 10:44:47,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:44:47,365 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 2 case distinctions, treesize of input 91 treesize of output 96 [2021-11-09 10:44:47,520 INFO L354 Elim1Store]: treesize reduction 172, result has 20.4 percent of original size [2021-11-09 10:44:47,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 174 treesize of output 127 [2021-11-09 10:44:47,555 INFO L354 Elim1Store]: treesize reduction 136, result has 26.5 percent of original size [2021-11-09 10:44:47,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 174 treesize of output 173 [2021-11-09 10:44:47,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:44:47,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:44:47,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:44:47,835 INFO L354 Elim1Store]: treesize reduction 176, result has 13.7 percent of original size [2021-11-09 10:44:47,835 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 18 case distinctions, treesize of input 202 treesize of output 158 [2021-11-09 10:44:47,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:44:47,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:44:47,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:44:47,861 INFO L354 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2021-11-09 10:44:47,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 198 treesize of output 196 [2021-11-09 10:44:49,010 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 207 treesize of output 206 [2021-11-09 10:44:49,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~y~0.base, main_~list~0.offset] [2021-11-09 10:44:49,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:44:49,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-09 10:44:49,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496977735] [2021-11-09 10:44:49,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 10:44:49,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:49,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 10:44:49,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 10:44:49,681 INFO L87 Difference]: Start difference. First operand 284 states and 306 transitions. Second operand has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 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 10:44:56,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:56,957 INFO L93 Difference]: Finished difference Result 331 states and 352 transitions. [2021-11-09 10:44:56,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-09 10:44:56,957 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 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 61 [2021-11-09 10:44:56,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:56,959 INFO L225 Difference]: With dead ends: 331 [2021-11-09 10:44:56,959 INFO L226 Difference]: Without dead ends: 331 [2021-11-09 10:44:56,966 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2613 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1226, Invalid=8674, Unknown=0, NotChecked=0, Total=9900 [2021-11-09 10:44:56,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-11-09 10:44:56,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 284. [2021-11-09 10:44:56,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 270 states have (on average 1.1185185185185185) internal successors, (302), 280 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 10:44:56,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 305 transitions. [2021-11-09 10:44:56,972 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 305 transitions. Word has length 61 [2021-11-09 10:44:56,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:56,972 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 305 transitions. [2021-11-09 10:44:56,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 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 10:44:56,973 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 305 transitions. [2021-11-09 10:44:56,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 10:44:56,974 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:56,974 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:57,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:57,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-09 10:44:57,201 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:44:57,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:57,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1844738496, now seen corresponding path program 5 times [2021-11-09 10:44:57,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:57,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525798597] [2021-11-09 10:44:57,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:57,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:57,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:44:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:58,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:58,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525798597] [2021-11-09 10:44:58,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525798597] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:58,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459904278] [2021-11-09 10:44:58,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:44:58,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:58,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:58,001 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:58,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 10:44:59,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 10:44:59,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:59,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-09 10:44:59,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:59,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:44:59,804 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:44:59,804 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 10:44:59,854 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 10:44:59,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:44:59,918 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 37 treesize of output 27 [2021-11-09 10:45:00,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:00,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:00,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:00,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:45:00,016 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2021-11-09 10:45:00,211 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-09 10:45:00,211 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 63 treesize of output 78 [2021-11-09 10:45:00,349 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-09 10:45:00,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 62 [2021-11-09 10:45:00,512 INFO L354 Elim1Store]: treesize reduction 158, result has 19.0 percent of original size [2021-11-09 10:45:00,512 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 117 treesize of output 85 [2021-11-09 10:45:01,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:01,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:01,120 INFO L354 Elim1Store]: treesize reduction 208, result has 11.1 percent of original size [2021-11-09 10:45:01,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 128 treesize of output 97 [2021-11-09 10:45:01,795 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:45:01,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:45:01,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-11-09 10:45:01,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511610696] [2021-11-09 10:45:01,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 10:45:01,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:01,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 10:45:01,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 10:45:01,796 INFO L87 Difference]: Start difference. First operand 284 states and 305 transitions. Second operand has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 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 10:45:05,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:05,129 INFO L93 Difference]: Finished difference Result 401 states and 425 transitions. [2021-11-09 10:45:05,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 10:45:05,130 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 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 62 [2021-11-09 10:45:05,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:05,131 INFO L225 Difference]: With dead ends: 401 [2021-11-09 10:45:05,131 INFO L226 Difference]: Without dead ends: 401 [2021-11-09 10:45:05,131 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=661, Invalid=3629, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 10:45:05,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-09 10:45:05,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 321. [2021-11-09 10:45:05,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 307 states have (on average 1.1140065146579805) internal successors, (342), 317 states have internal predecessors, (342), 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 10:45:05,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 345 transitions. [2021-11-09 10:45:05,138 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 345 transitions. Word has length 62 [2021-11-09 10:45:05,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:05,139 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 345 transitions. [2021-11-09 10:45:05,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 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 10:45:05,139 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 345 transitions. [2021-11-09 10:45:05,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 10:45:05,140 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:05,140 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:05,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:05,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-09 10:45:05,365 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:45:05,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:05,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1844738495, now seen corresponding path program 3 times [2021-11-09 10:45:05,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:05,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445630165] [2021-11-09 10:45:05,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:05,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:06,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:45:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:06,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:06,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445630165] [2021-11-09 10:45:06,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445630165] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:06,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051285373] [2021-11-09 10:45:06,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:45:06,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:06,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:06,230 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:06,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 10:45:08,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 10:45:08,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:08,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-09 10:45:08,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:08,078 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 10:45:08,081 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 10:45:08,144 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:45:08,145 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 10:45:08,152 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 12 treesize of output 14 [2021-11-09 10:45:08,205 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 10:45:08,215 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 10:45:08,292 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-09 10:45:08,292 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 84 treesize of output 62 [2021-11-09 10:45:08,301 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-09 10:45:08,301 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 76 treesize of output 66 [2021-11-09 10:45:08,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:08,445 INFO L354 Elim1Store]: treesize reduction 65, result has 16.7 percent of original size [2021-11-09 10:45:08,446 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 96 treesize of output 85 [2021-11-09 10:45:08,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:08,456 INFO L354 Elim1Store]: treesize reduction 59, result has 15.7 percent of original size [2021-11-09 10:45:08,457 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 92 treesize of output 89 [2021-11-09 10:45:08,692 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-09 10:45:08,692 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 20 treesize of output 22 [2021-11-09 10:45:08,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-09 10:45:08,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:08,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:45:08,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 83 [2021-11-09 10:45:08,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:08,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:45:08,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 92 [2021-11-09 10:45:08,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:08,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:45:08,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:09,032 INFO L354 Elim1Store]: treesize reduction 128, result has 22.4 percent of original size [2021-11-09 10:45:09,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 188 treesize of output 130 [2021-11-09 10:45:09,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:09,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:09,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:45:09,068 INFO L354 Elim1Store]: treesize reduction 136, result has 26.5 percent of original size [2021-11-09 10:45:09,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 188 treesize of output 187 [2021-11-09 10:45:09,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:09,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:09,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:09,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:45:09,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:45:09,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:09,402 INFO L354 Elim1Store]: treesize reduction 134, result has 13.5 percent of original size [2021-11-09 10:45:09,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 216 treesize of output 161 [2021-11-09 10:45:09,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:09,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:45:09,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:09,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:09,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:09,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:45:09,430 INFO L354 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2021-11-09 10:45:09,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 212 treesize of output 210 [2021-11-09 10:45:09,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:09,915 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-09 10:45:09,915 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 20 treesize of output 22 [2021-11-09 10:45:09,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:09,937 INFO L354 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2021-11-09 10:45:09,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 42 [2021-11-09 10:45:10,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:10,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:10,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:45:10,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:45:10,146 INFO L354 Elim1Store]: treesize reduction 162, result has 12.4 percent of original size [2021-11-09 10:45:10,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 229 treesize of output 230 [2021-11-09 10:45:10,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:10,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:10,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:45:10,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:45:10,175 INFO L354 Elim1Store]: treesize reduction 158, result has 11.7 percent of original size [2021-11-09 10:45:10,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 225 treesize of output 173 [2021-11-09 10:45:10,678 INFO L354 Elim1Store]: treesize reduction 502, result has 10.7 percent of original size [2021-11-09 10:45:10,679 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 10 new quantified variables, introduced 28 case distinctions, treesize of input 327 treesize of output 257 [2021-11-09 10:45:10,783 INFO L354 Elim1Store]: treesize reduction 576, result has 11.9 percent of original size [2021-11-09 10:45:10,783 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 11 new quantified variables, introduced 28 case distinctions, treesize of input 378 treesize of output 299 [2021-11-09 10:45:13,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:13,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:13,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:45:13,614 INFO L354 Elim1Store]: treesize reduction 540, result has 8.8 percent of original size [2021-11-09 10:45:13,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 33 case distinctions, treesize of input 328 treesize of output 246 [2021-11-09 10:45:13,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:13,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:45:13,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:13,710 INFO L354 Elim1Store]: treesize reduction 654, result has 9.4 percent of original size [2021-11-09 10:45:13,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 33 case distinctions, treesize of input 324 treesize of output 317 [2021-11-09 10:45:29,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:45:29,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:45:29,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-09 10:45:29,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623587525] [2021-11-09 10:45:29,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 10:45:29,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:29,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 10:45:29,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1594, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 10:45:29,895 INFO L87 Difference]: Start difference. First operand 321 states and 345 transitions. Second operand has 25 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 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 10:45:33,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:33,355 INFO L93 Difference]: Finished difference Result 392 states and 418 transitions. [2021-11-09 10:45:33,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 10:45:33,356 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 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 62 [2021-11-09 10:45:33,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:33,357 INFO L225 Difference]: With dead ends: 392 [2021-11-09 10:45:33,357 INFO L226 Difference]: Without dead ends: 392 [2021-11-09 10:45:33,358 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=461, Invalid=3321, Unknown=0, NotChecked=0, Total=3782 [2021-11-09 10:45:33,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-09 10:45:33,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 373. [2021-11-09 10:45:33,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 359 states have (on average 1.1086350974930361) internal successors, (398), 369 states have internal predecessors, (398), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:45:33,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 401 transitions. [2021-11-09 10:45:33,365 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 401 transitions. Word has length 62 [2021-11-09 10:45:33,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:33,365 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 401 transitions. [2021-11-09 10:45:33,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 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 10:45:33,366 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 401 transitions. [2021-11-09 10:45:33,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 10:45:33,367 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:33,367 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:33,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:33,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-09 10:45:33,589 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting mainErr22ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:45:33,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:33,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1350096206, now seen corresponding path program 2 times [2021-11-09 10:45:33,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:33,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193922860] [2021-11-09 10:45:33,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:33,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:33,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:34,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:45:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:34,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:34,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193922860] [2021-11-09 10:45:34,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193922860] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:34,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109865589] [2021-11-09 10:45:34,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:45:34,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:34,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:34,464 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:34,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 10:45:36,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:45:36,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:36,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-09 10:45:36,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:36,308 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 10:45:36,317 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 19 treesize of output 15 [2021-11-09 10:45:36,375 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-09 10:45:36,375 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 10:45:36,439 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 10:45:36,444 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 10:45:36,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:45:36,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 61 [2021-11-09 10:45:36,516 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 80 treesize of output 75 [2021-11-09 10:45:36,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:36,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:36,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:45:36,655 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 10:45:36,656 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 4 new quantified variables, introduced 4 case distinctions, treesize of input 100 treesize of output 84 [2021-11-09 10:45:36,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:36,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:36,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:45:36,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 98 [2021-11-09 10:45:36,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:36,905 INFO L354 Elim1Store]: treesize reduction 110, result has 32.1 percent of original size [2021-11-09 10:45:36,905 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 39 treesize of output 69 [2021-11-09 10:45:37,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:45:37,027 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 2 case distinctions, treesize of input 120 treesize of output 125 [2021-11-09 10:45:37,032 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 10:45:37,033 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 5 case distinctions, treesize of input 116 treesize of output 95 [2021-11-09 10:45:37,235 INFO L354 Elim1Store]: treesize reduction 172, result has 20.4 percent of original size [2021-11-09 10:45:37,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 216 treesize of output 141 [2021-11-09 10:45:37,272 INFO L354 Elim1Store]: treesize reduction 136, result has 26.5 percent of original size [2021-11-09 10:45:37,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 216 treesize of output 215 [2021-11-09 10:45:37,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:37,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:45:37,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:37,619 INFO L354 Elim1Store]: treesize reduction 176, result has 13.7 percent of original size [2021-11-09 10:45:37,619 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 18 case distinctions, treesize of input 244 treesize of output 172 [2021-11-09 10:45:37,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:37,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:37,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:45:37,646 INFO L354 Elim1Store]: treesize reduction 132, result has 14.8 percent of original size [2021-11-09 10:45:37,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 195 treesize of output 193 [2021-11-09 10:45:40,394 INFO L354 Elim1Store]: treesize reduction 138, result has 14.8 percent of original size [2021-11-09 10:45:40,395 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 205 treesize of output 211 [2021-11-09 10:45:41,172 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~y~0.base, main_~list~0.offset] [2021-11-09 10:45:41,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:45:41,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-09 10:45:41,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274424103] [2021-11-09 10:45:41,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 10:45:41,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:41,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 10:45:41,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1434, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 10:45:41,173 INFO L87 Difference]: Start difference. First operand 373 states and 401 transitions. Second operand has 26 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 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 10:45:45,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:45,316 INFO L93 Difference]: Finished difference Result 378 states and 406 transitions. [2021-11-09 10:45:45,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 10:45:45,317 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 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 62 [2021-11-09 10:45:45,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:45,318 INFO L225 Difference]: With dead ends: 378 [2021-11-09 10:45:45,318 INFO L226 Difference]: Without dead ends: 378 [2021-11-09 10:45:45,319 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=690, Invalid=4280, Unknown=0, NotChecked=0, Total=4970 [2021-11-09 10:45:45,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-09 10:45:45,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 377. [2021-11-09 10:45:45,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 363 states have (on average 1.1074380165289257) internal successors, (402), 373 states have internal predecessors, (402), 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 10:45:45,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 405 transitions. [2021-11-09 10:45:45,325 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 405 transitions. Word has length 62 [2021-11-09 10:45:45,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:45,326 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 405 transitions. [2021-11-09 10:45:45,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 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 10:45:45,326 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 405 transitions. [2021-11-09 10:45:45,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 10:45:45,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:45,327 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:45,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:45,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-09 10:45:45,533 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:45:45,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:45,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1352319419, now seen corresponding path program 5 times [2021-11-09 10:45:45,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:45,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731969499] [2021-11-09 10:45:45,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:45,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:46,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:45:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:46,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:46,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731969499] [2021-11-09 10:45:46,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731969499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:46,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966390202] [2021-11-09 10:45:46,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:45:46,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:46,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:46,294 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:46,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 10:45:48,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 10:45:48,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:48,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-09 10:45:48,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:48,398 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 10:45:48,516 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:45:48,516 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 10:45:48,568 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 10:45:48,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:48,627 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 31 [2021-11-09 10:45:48,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:48,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:48,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:48,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:45:48,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 43 [2021-11-09 10:45:48,935 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-09 10:45:48,935 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 71 treesize of output 86 [2021-11-09 10:45:49,042 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-09 10:45:49,042 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 74 treesize of output 66 [2021-11-09 10:45:49,197 INFO L354 Elim1Store]: treesize reduction 158, result has 19.0 percent of original size [2021-11-09 10:45:49,198 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 129 treesize of output 89 [2021-11-09 10:45:51,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:51,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:51,173 INFO L354 Elim1Store]: treesize reduction 208, result has 11.1 percent of original size [2021-11-09 10:45:51,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 140 treesize of output 101 [2021-11-09 10:45:51,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:45:51,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:45:51,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-09 10:45:51,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981198085] [2021-11-09 10:45:51,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 10:45:51,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:51,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 10:45:51,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1284, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 10:45:51,444 INFO L87 Difference]: Start difference. First operand 377 states and 405 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 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 10:45:53,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:53,788 INFO L93 Difference]: Finished difference Result 453 states and 484 transitions. [2021-11-09 10:45:53,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 10:45:53,788 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 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 63 [2021-11-09 10:45:53,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:53,790 INFO L225 Difference]: With dead ends: 453 [2021-11-09 10:45:53,791 INFO L226 Difference]: Without dead ends: 453 [2021-11-09 10:45:53,791 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=747, Invalid=3809, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 10:45:53,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-11-09 10:45:53,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 380. [2021-11-09 10:45:53,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 366 states have (on average 1.1038251366120218) internal successors, (404), 376 states have internal predecessors, (404), 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 10:45:53,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 407 transitions. [2021-11-09 10:45:53,801 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 407 transitions. Word has length 63 [2021-11-09 10:45:53,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:53,801 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 407 transitions. [2021-11-09 10:45:53,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 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 10:45:53,802 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 407 transitions. [2021-11-09 10:45:53,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 10:45:53,803 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:53,803 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:53,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:54,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:54,029 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:45:54,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:54,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1027799906, now seen corresponding path program 1 times [2021-11-09 10:45:54,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:54,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241960702] [2021-11-09 10:45:54,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:54,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:54,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:45:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:54,979 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:54,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:54,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241960702] [2021-11-09 10:45:54,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241960702] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:54,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260959134] [2021-11-09 10:45:54,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:54,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:54,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:54,981 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:54,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 10:45:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:56,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-09 10:45:56,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:56,953 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 10:45:56,957 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 10:45:57,018 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:45:57,019 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 10:45:57,035 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:45:57,035 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 10:45:57,104 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 10:45:57,115 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 10:45:57,188 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-09 10:45:57,188 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 84 treesize of output 62 [2021-11-09 10:45:57,197 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-09 10:45:57,198 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 76 treesize of output 66 [2021-11-09 10:45:57,344 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-09 10:45:57,345 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 90 treesize of output 87 [2021-11-09 10:45:57,354 INFO L354 Elim1Store]: treesize reduction 61, result has 17.6 percent of original size [2021-11-09 10:45:57,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 75 [2021-11-09 10:45:57,639 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-09 10:45:57,639 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 10:45:57,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-09 10:45:57,777 INFO L354 Elim1Store]: treesize reduction 79, result has 14.1 percent of original size [2021-11-09 10:45:57,777 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 112 treesize of output 100 [2021-11-09 10:45:57,790 INFO L354 Elim1Store]: treesize reduction 69, result has 13.8 percent of original size [2021-11-09 10:45:57,790 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 108 treesize of output 108 [2021-11-09 10:45:57,978 INFO L354 Elim1Store]: treesize reduction 118, result has 28.5 percent of original size [2021-11-09 10:45:57,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 194 treesize of output 138 [2021-11-09 10:45:58,022 INFO L354 Elim1Store]: treesize reduction 112, result has 26.8 percent of original size [2021-11-09 10:45:58,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 167 treesize of output 166 [2021-11-09 10:45:59,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:59,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:59,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:45:59,093 INFO L354 Elim1Store]: treesize reduction 132, result has 14.8 percent of original size [2021-11-09 10:45:59,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 195 treesize of output 193 [2021-11-09 10:45:59,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:59,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:59,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:45:59,120 INFO L354 Elim1Store]: treesize reduction 134, result has 13.5 percent of original size [2021-11-09 10:45:59,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 191 treesize of output 165 [2021-11-09 10:45:59,799 INFO L354 Elim1Store]: treesize reduction 86, result has 18.9 percent of original size [2021-11-09 10:45:59,800 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 6 case distinctions, treesize of input 101 treesize of output 109 [2021-11-09 10:45:59,819 INFO L354 Elim1Store]: treesize reduction 44, result has 27.9 percent of original size [2021-11-09 10:45:59,819 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 100 treesize of output 104 [2021-11-09 10:46:00,095 INFO L354 Elim1Store]: treesize reduction 156, result has 11.9 percent of original size [2021-11-09 10:46:00,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 201 treesize of output 178 [2021-11-09 10:46:00,125 INFO L354 Elim1Store]: treesize reduction 152, result has 13.1 percent of original size [2021-11-09 10:46:00,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 197 treesize of output 198 [2021-11-09 10:46:00,734 INFO L354 Elim1Store]: treesize reduction 324, result has 15.2 percent of original size [2021-11-09 10:46:00,734 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 10 new quantified variables, introduced 28 case distinctions, treesize of input 289 treesize of output 223 [2021-11-09 10:46:00,822 INFO L354 Elim1Store]: treesize reduction 440, result has 16.3 percent of original size [2021-11-09 10:46:00,822 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 9 new quantified variables, introduced 28 case distinctions, treesize of input 329 treesize of output 308 [2021-11-09 10:46:01,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:01,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:01,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:46:01,567 INFO L354 Elim1Store]: treesize reduction 320, result has 9.9 percent of original size [2021-11-09 10:46:01,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 32 case distinctions, treesize of input 357 treesize of output 254 [2021-11-09 10:46:01,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:01,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:01,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:46:01,664 INFO L354 Elim1Store]: treesize reduction 460, result has 10.3 percent of original size [2021-11-09 10:46:01,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 32 case distinctions, treesize of input 368 treesize of output 330 [2021-11-09 10:46:33,127 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 330 treesize of output 329 [2021-11-09 10:46:45,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~y~0.base, main_~list~0.offset] [2021-11-09 10:46:45,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:46:45,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-09 10:46:45,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274126677] [2021-11-09 10:46:45,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 10:46:45,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:45,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 10:46:45,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1922, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 10:46:45,589 INFO L87 Difference]: Start difference. First operand 380 states and 407 transitions. Second operand has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 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 10:46:50,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:50,320 INFO L93 Difference]: Finished difference Result 418 states and 447 transitions. [2021-11-09 10:46:50,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 10:46:50,321 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 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 64 [2021-11-09 10:46:50,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:50,323 INFO L225 Difference]: With dead ends: 418 [2021-11-09 10:46:50,323 INFO L226 Difference]: Without dead ends: 418 [2021-11-09 10:46:50,324 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=563, Invalid=3993, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 10:46:50,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-09 10:46:50,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 384. [2021-11-09 10:46:50,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 370 states have (on average 1.1054054054054054) internal successors, (409), 380 states have internal predecessors, (409), 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 10:46:50,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 412 transitions. [2021-11-09 10:46:50,331 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 412 transitions. Word has length 64 [2021-11-09 10:46:50,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:50,331 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 412 transitions. [2021-11-09 10:46:50,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 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 10:46:50,332 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 412 transitions. [2021-11-09 10:46:50,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 10:46:50,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:50,333 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:50,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:50,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:50,548 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting mainErr25ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:46:50,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:50,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1652774313, now seen corresponding path program 2 times [2021-11-09 10:46:50,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:50,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911932754] [2021-11-09 10:46:50,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:50,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:51,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:51,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:51,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:51,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911932754] [2021-11-09 10:46:51,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911932754] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:51,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130925065] [2021-11-09 10:46:51,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:46:51,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:51,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:51,289 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:51,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 10:46:53,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:46:53,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:53,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-09 10:46:53,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:54,039 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 10:46:54,080 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:46:54,081 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 10:46:54,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-09 10:46:54,216 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:46:54,216 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 10:46:54,300 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 10:46:54,410 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-09 10:46:54,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 43 [2021-11-09 10:46:54,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:54,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:46:54,632 INFO L354 Elim1Store]: treesize reduction 74, result has 18.7 percent of original size [2021-11-09 10:46:54,633 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 55 [2021-11-09 10:46:54,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:46:54,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:46:54,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-09 10:46:54,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128366622] [2021-11-09 10:46:54,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 10:46:54,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:54,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 10:46:54,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-11-09 10:46:54,733 INFO L87 Difference]: Start difference. First operand 384 states and 412 transitions. Second operand has 26 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 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 10:47:00,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:00,282 INFO L93 Difference]: Finished difference Result 417 states and 442 transitions. [2021-11-09 10:47:00,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-11-09 10:47:00,283 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 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 65 [2021-11-09 10:47:00,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:00,285 INFO L225 Difference]: With dead ends: 417 [2021-11-09 10:47:00,285 INFO L226 Difference]: Without dead ends: 417 [2021-11-09 10:47:00,286 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3544 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1769, Invalid=9787, Unknown=0, NotChecked=0, Total=11556 [2021-11-09 10:47:00,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-11-09 10:47:00,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 378. [2021-11-09 10:47:00,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 364 states have (on average 1.1016483516483517) internal successors, (401), 374 states have internal predecessors, (401), 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 10:47:00,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 404 transitions. [2021-11-09 10:47:00,293 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 404 transitions. Word has length 65 [2021-11-09 10:47:00,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:00,293 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 404 transitions. [2021-11-09 10:47:00,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 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 10:47:00,293 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 404 transitions. [2021-11-09 10:47:00,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 10:47:00,295 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:00,295 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:47:00,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:00,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-11-09 10:47:00,513 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:47:00,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:00,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1217413658, now seen corresponding path program 2 times [2021-11-09 10:47:00,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:00,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288519388] [2021-11-09 10:47:00,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:00,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:05,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:47:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:05,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:05,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288519388] [2021-11-09 10:47:05,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288519388] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:05,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430074616] [2021-11-09 10:47:05,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:47:05,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:05,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:05,826 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:05,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 10:47:08,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:47:08,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:47:08,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-09 10:47:08,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:08,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:47:08,386 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 10:47:08,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 42 [2021-11-09 10:47:08,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:08,622 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-11-09 10:47:08,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 68 [2021-11-09 10:47:08,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:47:08,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:47:08,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-11-09 10:47:08,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570480499] [2021-11-09 10:47:08,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 10:47:08,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:08,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 10:47:08,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1940, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 10:47:08,793 INFO L87 Difference]: Start difference. First operand 378 states and 404 transitions. Second operand has 39 states, 38 states have (on average 1.631578947368421) internal successors, (62), 38 states have internal predecessors, (62), 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 10:47:15,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:15,126 INFO L93 Difference]: Finished difference Result 380 states and 405 transitions. [2021-11-09 10:47:15,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-09 10:47:15,126 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.631578947368421) internal successors, (62), 38 states have internal predecessors, (62), 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 65 [2021-11-09 10:47:15,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:15,128 INFO L225 Difference]: With dead ends: 380 [2021-11-09 10:47:15,128 INFO L226 Difference]: Without dead ends: 345 [2021-11-09 10:47:15,128 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=363, Invalid=5337, Unknown=0, NotChecked=0, Total=5700 [2021-11-09 10:47:15,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-11-09 10:47:15,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2021-11-09 10:47:15,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 331 states have (on average 1.108761329305136) internal successors, (367), 341 states have internal predecessors, (367), 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 10:47:15,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 370 transitions. [2021-11-09 10:47:15,134 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 370 transitions. Word has length 65 [2021-11-09 10:47:15,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:15,134 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 370 transitions. [2021-11-09 10:47:15,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.631578947368421) internal successors, (62), 38 states have internal predecessors, (62), 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 10:47:15,134 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 370 transitions. [2021-11-09 10:47:15,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 10:47:15,135 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:15,136 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:15,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:15,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-09 10:47:15,361 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting mainErr23ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:47:15,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:15,362 INFO L85 PathProgramCache]: Analyzing trace with hash -126767518, now seen corresponding path program 1 times [2021-11-09 10:47:15,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:15,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456489178] [2021-11-09 10:47:15,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:15,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:15,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:16,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:47:16,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:16,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:16,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456489178] [2021-11-09 10:47:16,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456489178] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:16,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790818576] [2021-11-09 10:47:16,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:16,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:16,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:16,031 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:16,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 10:47:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:18,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-09 10:47:18,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:18,325 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 10:47:18,370 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:47:18,370 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 10:47:18,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 10:47:18,477 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 10:47:18,477 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 34 treesize of output 32 [2021-11-09 10:47:18,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:47:18,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:47:18,600 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 1 case distinctions, treesize of input 35 treesize of output 37 [2021-11-09 10:47:18,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.base] [2021-11-09 10:47:18,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:47:18,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-09 10:47:18,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646156846] [2021-11-09 10:47:18,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 10:47:18,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:18,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 10:47:18,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-11-09 10:47:18,657 INFO L87 Difference]: Start difference. First operand 345 states and 370 transitions. Second operand has 26 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 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 10:47:20,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:20,414 INFO L93 Difference]: Finished difference Result 378 states and 403 transitions. [2021-11-09 10:47:20,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 10:47:20,414 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 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 66 [2021-11-09 10:47:20,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:20,416 INFO L225 Difference]: With dead ends: 378 [2021-11-09 10:47:20,416 INFO L226 Difference]: Without dead ends: 378 [2021-11-09 10:47:20,416 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=466, Invalid=2084, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 10:47:20,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-09 10:47:20,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 355. [2021-11-09 10:47:20,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 341 states have (on average 1.1290322580645162) internal successors, (385), 351 states have internal predecessors, (385), 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 10:47:20,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 388 transitions. [2021-11-09 10:47:20,424 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 388 transitions. Word has length 66 [2021-11-09 10:47:20,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:20,425 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 388 transitions. [2021-11-09 10:47:20,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 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 10:47:20,425 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 388 transitions. [2021-11-09 10:47:20,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 10:47:20,427 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:20,427 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:20,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:20,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:20,651 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting mainErr24ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:47:20,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:20,651 INFO L85 PathProgramCache]: Analyzing trace with hash 365174361, now seen corresponding path program 3 times [2021-11-09 10:47:20,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:20,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397715549] [2021-11-09 10:47:20,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:20,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:21,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:47:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:21,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:21,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397715549] [2021-11-09 10:47:21,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397715549] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:21,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223798885] [2021-11-09 10:47:21,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:47:21,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:21,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:21,392 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:21,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 10:47:23,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 10:47:23,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:47:23,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-09 10:47:23,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:23,906 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 10:47:23,979 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:47:23,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-09 10:47:24,040 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 10:47:24,134 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 10:47:24,134 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 48 treesize of output 34 [2021-11-09 10:47:24,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:24,254 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-11-09 10:47:24,254 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 53 treesize of output 46 [2021-11-09 10:47:24,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:47:24,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:47:24,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-09 10:47:24,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248816972] [2021-11-09 10:47:24,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 10:47:24,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:24,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 10:47:24,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=737, Unknown=0, NotChecked=0, Total=812 [2021-11-09 10:47:24,323 INFO L87 Difference]: Start difference. First operand 355 states and 388 transitions. Second operand has 25 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 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 10:47:26,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:26,732 INFO L93 Difference]: Finished difference Result 406 states and 435 transitions. [2021-11-09 10:47:26,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 10:47:26,733 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 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 67 [2021-11-09 10:47:26,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:26,734 INFO L225 Difference]: With dead ends: 406 [2021-11-09 10:47:26,734 INFO L226 Difference]: Without dead ends: 406 [2021-11-09 10:47:26,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=487, Invalid=2269, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 10:47:26,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-11-09 10:47:26,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 357. [2021-11-09 10:47:26,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 343 states have (on average 1.1282798833819243) internal successors, (387), 353 states have internal predecessors, (387), 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 10:47:26,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 390 transitions. [2021-11-09 10:47:26,741 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 390 transitions. Word has length 67 [2021-11-09 10:47:26,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:26,741 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 390 transitions. [2021-11-09 10:47:26,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 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 10:47:26,742 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 390 transitions. [2021-11-09 10:47:26,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 10:47:26,743 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:26,743 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:26,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:26,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-09 10:47:26,957 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting mainErr20ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:47:26,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:26,957 INFO L85 PathProgramCache]: Analyzing trace with hash 365163376, now seen corresponding path program 3 times [2021-11-09 10:47:26,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:26,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782342291] [2021-11-09 10:47:26,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:26,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:28,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:47:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:28,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:28,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782342291] [2021-11-09 10:47:28,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782342291] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:28,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539232738] [2021-11-09 10:47:28,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:47:28,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:28,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:28,266 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:28,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-09 10:47:31,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 10:47:31,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:47:31,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-09 10:47:31,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:31,123 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 10:47:31,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 10:47:31,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 10:47:31,212 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:47:31,212 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 10:47:31,353 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 10:47:31,367 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 10:47:31,478 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-09 10:47:31,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 74 [2021-11-09 10:47:31,497 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-09 10:47:31,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 86 [2021-11-09 10:47:31,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:31,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:47:31,699 INFO L354 Elim1Store]: treesize reduction 94, result has 18.3 percent of original size [2021-11-09 10:47:31,699 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 113 treesize of output 97 [2021-11-09 10:47:31,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:31,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:47:31,716 INFO L354 Elim1Store]: treesize reduction 96, result has 19.3 percent of original size [2021-11-09 10:47:31,717 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 109 treesize of output 109 [2021-11-09 10:47:31,964 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-09 10:47:31,964 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 10:47:32,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:32,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:32,091 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 10:47:32,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 117 treesize of output 100 [2021-11-09 10:47:32,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:32,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:32,099 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:47:32,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 113 treesize of output 121 [2021-11-09 10:47:32,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:32,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:47:32,323 INFO L354 Elim1Store]: treesize reduction 172, result has 20.4 percent of original size [2021-11-09 10:47:32,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 217 treesize of output 142 [2021-11-09 10:47:32,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:32,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:32,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:47:32,386 INFO L354 Elim1Store]: treesize reduction 212, result has 23.2 percent of original size [2021-11-09 10:47:32,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 217 treesize of output 219 [2021-11-09 10:47:32,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:32,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:47:32,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:32,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:32,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:32,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:47:32,742 INFO L354 Elim1Store]: treesize reduction 176, result has 13.7 percent of original size [2021-11-09 10:47:32,742 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 18 case distinctions, treesize of input 245 treesize of output 173 [2021-11-09 10:47:32,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:32,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:47:32,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:32,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:32,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:47:32,783 INFO L354 Elim1Store]: treesize reduction 178, result has 14.4 percent of original size [2021-11-09 10:47:32,783 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 18 case distinctions, treesize of input 188 treesize of output 189 [2021-11-09 10:47:33,745 INFO L354 Elim1Store]: treesize reduction 44, result has 27.9 percent of original size [2021-11-09 10:47:33,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 167 treesize of output 171 [2021-11-09 10:47:34,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:34,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:34,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:47:34,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:47:34,175 INFO L354 Elim1Store]: treesize reduction 192, result has 9.9 percent of original size [2021-11-09 10:47:34,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 204 treesize of output 188 [2021-11-09 10:47:34,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:34,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:34,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:47:34,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:34,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:47:34,218 INFO L354 Elim1Store]: treesize reduction 190, result has 10.8 percent of original size [2021-11-09 10:47:34,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 200 treesize of output 204 [2021-11-09 10:47:34,773 INFO L354 Elim1Store]: treesize reduction 592, result has 10.2 percent of original size [2021-11-09 10:47:34,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 36 case distinctions, treesize of input 322 treesize of output 263 [2021-11-09 10:47:34,895 INFO L354 Elim1Store]: treesize reduction 500, result has 11.5 percent of original size [2021-11-09 10:47:34,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 36 case distinctions, treesize of input 487 treesize of output 349 [2021-11-09 10:47:35,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:47:35,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:35,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:35,542 INFO L354 Elim1Store]: treesize reduction 628, result has 8.6 percent of original size [2021-11-09 10:47:35,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 42 case distinctions, treesize of input 507 treesize of output 286 [2021-11-09 10:47:35,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:47:35,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:35,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:35,666 INFO L354 Elim1Store]: treesize reduction 572, result has 8.8 percent of original size [2021-11-09 10:47:35,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 15 new quantified variables, introduced 42 case distinctions, treesize of input 503 treesize of output 372 [2021-11-09 10:47:44,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:47:44,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:47:44,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-11-09 10:47:44,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339193038] [2021-11-09 10:47:44,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 10:47:44,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:44,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 10:47:44,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1824, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 10:47:44,961 INFO L87 Difference]: Start difference. First operand 357 states and 390 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 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 10:48:26,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:26,474 INFO L93 Difference]: Finished difference Result 700 states and 752 transitions. [2021-11-09 10:48:26,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-11-09 10:48:26,475 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 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 67 [2021-11-09 10:48:26,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:26,477 INFO L225 Difference]: With dead ends: 700 [2021-11-09 10:48:26,477 INFO L226 Difference]: Without dead ends: 700 [2021-11-09 10:48:26,481 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9386 ImplicationChecksByTransitivity, 41.2s TimeCoverageRelationStatistics Valid=2735, Invalid=23990, Unknown=7, NotChecked=0, Total=26732 [2021-11-09 10:48:26,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-11-09 10:48:26,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 625. [2021-11-09 10:48:26,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 611 states have (on average 1.1063829787234043) internal successors, (676), 621 states have internal predecessors, (676), 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 10:48:26,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 679 transitions. [2021-11-09 10:48:26,490 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 679 transitions. Word has length 67 [2021-11-09 10:48:26,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:26,491 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 679 transitions. [2021-11-09 10:48:26,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 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 10:48:26,491 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 679 transitions. [2021-11-09 10:48:26,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 10:48:26,493 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:26,493 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:26,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-09 10:48:26,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-09 10:48:26,712 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:48:26,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:26,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1558229880, now seen corresponding path program 3 times [2021-11-09 10:48:26,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:26,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364142359] [2021-11-09 10:48:26,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:26,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:28,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:48:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:28,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:28,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364142359] [2021-11-09 10:48:28,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364142359] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:28,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581647963] [2021-11-09 10:48:28,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:48:28,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:28,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:28,120 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:28,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-09 10:48:31,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 10:48:31,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:31,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-09 10:48:31,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:31,080 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 10:48:31,150 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:48:31,150 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 10:48:31,210 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 10:48:31,290 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 10:48:31,291 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 39 treesize of output 29 [2021-11-09 10:48:31,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:31,426 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-11-09 10:48:31,427 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 44 treesize of output 41 [2021-11-09 10:48:31,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:48:31,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:48:31,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-11-09 10:48:31,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479610702] [2021-11-09 10:48:31,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 10:48:31,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:31,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 10:48:31,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 10:48:31,513 INFO L87 Difference]: Start difference. First operand 625 states and 679 transitions. Second operand has 34 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 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 10:48:40,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:40,863 INFO L93 Difference]: Finished difference Result 713 states and 775 transitions. [2021-11-09 10:48:40,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-09 10:48:40,864 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 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 67 [2021-11-09 10:48:40,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:40,867 INFO L225 Difference]: With dead ends: 713 [2021-11-09 10:48:40,867 INFO L226 Difference]: Without dead ends: 713 [2021-11-09 10:48:40,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1048, Invalid=4064, Unknown=0, NotChecked=0, Total=5112 [2021-11-09 10:48:40,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-11-09 10:48:40,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 667. [2021-11-09 10:48:40,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 653 states have (on average 1.105666156202144) internal successors, (722), 663 states have internal predecessors, (722), 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 10:48:40,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 725 transitions. [2021-11-09 10:48:40,878 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 725 transitions. Word has length 67 [2021-11-09 10:48:40,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:40,878 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 725 transitions. [2021-11-09 10:48:40,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 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 10:48:40,879 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 725 transitions. [2021-11-09 10:48:40,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 10:48:40,881 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:40,881 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:40,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:41,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:41,105 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:48:41,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:41,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1558229881, now seen corresponding path program 1 times [2021-11-09 10:48:41,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:41,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380034389] [2021-11-09 10:48:41,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:41,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:42,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:48:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:42,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:42,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380034389] [2021-11-09 10:48:42,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380034389] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:42,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173115995] [2021-11-09 10:48:42,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:42,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:42,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:42,437 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:42,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-09 10:48:45,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:45,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 105 conjunts are in the unsatisfiable core [2021-11-09 10:48:45,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:45,188 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 10:48:45,192 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 10:48:45,262 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:48:45,262 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 10:48:45,282 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:48:45,283 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 10:48:45,355 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 10:48:45,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 10:48:45,442 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-09 10:48:45,442 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 84 treesize of output 62 [2021-11-09 10:48:45,453 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-09 10:48:45,453 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 76 treesize of output 66 [2021-11-09 10:48:45,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:48:45,600 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 67 [2021-11-09 10:48:45,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:48:45,605 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 1 case distinctions, treesize of input 74 treesize of output 76 [2021-11-09 10:48:45,840 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 10:48:45,840 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 21 treesize of output 26 [2021-11-09 10:48:45,875 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-09 10:48:45,875 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 10:48:46,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:48:46,023 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 2 case distinctions, treesize of input 100 treesize of output 105 [2021-11-09 10:48:46,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:48:46,032 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 96 treesize of output 84 [2021-11-09 10:48:46,284 INFO L354 Elim1Store]: treesize reduction 118, result has 28.5 percent of original size [2021-11-09 10:48:46,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 194 treesize of output 138 [2021-11-09 10:48:46,336 INFO L354 Elim1Store]: treesize reduction 112, result has 26.8 percent of original size [2021-11-09 10:48:46,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 167 treesize of output 166 [2021-11-09 10:48:46,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:46,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:46,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:48:46,936 INFO L354 Elim1Store]: treesize reduction 134, result has 13.5 percent of original size [2021-11-09 10:48:46,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 195 treesize of output 169 [2021-11-09 10:48:46,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:46,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:46,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:48:46,964 INFO L354 Elim1Store]: treesize reduction 132, result has 14.8 percent of original size [2021-11-09 10:48:46,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 191 treesize of output 189 [2021-11-09 10:48:47,698 INFO L354 Elim1Store]: treesize reduction 98, result has 26.9 percent of original size [2021-11-09 10:48:47,698 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 107 treesize of output 129 [2021-11-09 10:48:47,727 INFO L354 Elim1Store]: treesize reduction 86, result has 18.9 percent of original size [2021-11-09 10:48:47,728 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 6 case distinctions, treesize of input 117 treesize of output 125 [2021-11-09 10:48:48,121 INFO L354 Elim1Store]: treesize reduction 152, result has 13.1 percent of original size [2021-11-09 10:48:48,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 215 treesize of output 216 [2021-11-09 10:48:48,156 INFO L354 Elim1Store]: treesize reduction 156, result has 11.9 percent of original size [2021-11-09 10:48:48,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 211 treesize of output 184 [2021-11-09 10:48:49,019 INFO L354 Elim1Store]: treesize reduction 324, result has 15.2 percent of original size [2021-11-09 10:48:49,019 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 10 new quantified variables, introduced 28 case distinctions, treesize of input 312 treesize of output 238 [2021-11-09 10:48:49,142 INFO L354 Elim1Store]: treesize reduction 440, result has 16.3 percent of original size [2021-11-09 10:48:49,143 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 9 new quantified variables, introduced 28 case distinctions, treesize of input 356 treesize of output 335 [2021-11-09 10:48:49,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:49,936 INFO L354 Elim1Store]: treesize reduction 72, result has 28.7 percent of original size [2021-11-09 10:48:49,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 151 treesize of output 157 [2021-11-09 10:48:49,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:49,980 INFO L354 Elim1Store]: treesize reduction 148, result has 18.2 percent of original size [2021-11-09 10:48:49,981 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 8 case distinctions, treesize of input 142 treesize of output 153 [2021-11-09 10:48:50,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:50,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:48:50,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:50,443 INFO L354 Elim1Store]: treesize reduction 320, result has 9.9 percent of original size [2021-11-09 10:48:50,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 32 case distinctions, treesize of input 360 treesize of output 257 [2021-11-09 10:48:50,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:50,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:50,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:48:50,527 INFO L354 Elim1Store]: treesize reduction 452, result has 10.5 percent of original size [2021-11-09 10:48:50,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 32 case distinctions, treesize of input 353 treesize of output 331 [2021-11-09 10:48:54,486 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 12 treesize of output 11 [2021-11-09 10:48:55,624 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 10:48:55,624 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 366 treesize of output 368 [2021-11-09 10:49:04,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~y~0.base] [2021-11-09 10:49:04,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:49:04,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-09 10:49:04,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336186877] [2021-11-09 10:49:04,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 10:49:04,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:04,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 10:49:04,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2205, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 10:49:04,780 INFO L87 Difference]: Start difference. First operand 667 states and 725 transitions. Second operand has 26 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 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 10:49:09,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:09,603 INFO L93 Difference]: Finished difference Result 693 states and 749 transitions. [2021-11-09 10:49:09,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 10:49:09,604 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 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 67 [2021-11-09 10:49:09,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:09,607 INFO L225 Difference]: With dead ends: 693 [2021-11-09 10:49:09,607 INFO L226 Difference]: Without dead ends: 693 [2021-11-09 10:49:09,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=448, Invalid=3974, Unknown=0, NotChecked=0, Total=4422 [2021-11-09 10:49:09,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-11-09 10:49:09,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 667. [2021-11-09 10:49:09,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 653 states have (on average 1.0995405819295558) internal successors, (718), 663 states have internal predecessors, (718), 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 10:49:09,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 721 transitions. [2021-11-09 10:49:09,621 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 721 transitions. Word has length 67 [2021-11-09 10:49:09,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:09,621 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 721 transitions. [2021-11-09 10:49:09,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 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 10:49:09,622 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 721 transitions. [2021-11-09 10:49:09,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 10:49:09,623 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:09,624 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:09,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:09,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:09,837 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:49:09,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:09,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1223130242, now seen corresponding path program 4 times [2021-11-09 10:49:09,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:09,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544326413] [2021-11-09 10:49:09,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:09,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:09,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:11,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:49:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 5 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:11,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:11,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544326413] [2021-11-09 10:49:11,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544326413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:11,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402016967] [2021-11-09 10:49:11,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:49:11,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:11,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:11,340 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:11,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-09 10:49:14,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:49:14,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:49:14,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-09 10:49:14,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:14,516 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 10:49:14,649 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:49:14,649 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 10:49:14,715 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 10:49:14,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:14,795 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 37 treesize of output 27 [2021-11-09 10:49:14,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:14,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:14,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:14,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:49:14,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2021-11-09 10:49:15,157 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-09 10:49:15,157 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 63 treesize of output 78 [2021-11-09 10:49:15,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:15,297 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-09 10:49:15,297 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 66 treesize of output 62 [2021-11-09 10:49:15,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:15,505 INFO L354 Elim1Store]: treesize reduction 158, result has 19.0 percent of original size [2021-11-09 10:49:15,505 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 117 treesize of output 85 [2021-11-09 10:49:16,320 INFO L354 Elim1Store]: treesize reduction 138, result has 27.4 percent of original size [2021-11-09 10:49:16,321 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 9 case distinctions, treesize of input 131 treesize of output 161 [2021-11-09 10:49:16,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:16,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:16,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:16,729 INFO L354 Elim1Store]: treesize reduction 208, result has 11.1 percent of original size [2021-11-09 10:49:16,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 161 treesize of output 118 [2021-11-09 10:49:17,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:49:17,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:49:17,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-11-09 10:49:17,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393773902] [2021-11-09 10:49:17,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 10:49:17,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:17,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 10:49:17,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1979, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 10:49:17,435 INFO L87 Difference]: Start difference. First operand 667 states and 721 transitions. Second operand has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 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 10:49:26,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:26,995 INFO L93 Difference]: Finished difference Result 714 states and 771 transitions. [2021-11-09 10:49:26,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-09 10:49:26,995 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 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 67 [2021-11-09 10:49:26,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:26,998 INFO L225 Difference]: With dead ends: 714 [2021-11-09 10:49:26,998 INFO L226 Difference]: Without dead ends: 714 [2021-11-09 10:49:26,999 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1222, Invalid=6260, Unknown=0, NotChecked=0, Total=7482 [2021-11-09 10:49:26,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-11-09 10:49:27,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 651. [2021-11-09 10:49:27,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 637 states have (on average 1.1020408163265305) internal successors, (702), 647 states have internal predecessors, (702), 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 10:49:27,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 705 transitions. [2021-11-09 10:49:27,006 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 705 transitions. Word has length 67 [2021-11-09 10:49:27,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:27,007 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 705 transitions. [2021-11-09 10:49:27,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 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 10:49:27,007 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 705 transitions. [2021-11-09 10:49:27,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 10:49:27,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:27,009 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:27,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:27,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-09 10:49:27,217 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:49:27,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:27,218 INFO L85 PathProgramCache]: Analyzing trace with hash -821781620, now seen corresponding path program 5 times [2021-11-09 10:49:27,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:27,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990757258] [2021-11-09 10:49:27,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:27,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:28,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:49:28,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:28,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:28,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990757258] [2021-11-09 10:49:28,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990757258] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:28,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412003946] [2021-11-09 10:49:28,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:49:28,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:28,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:28,872 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:28,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-09 10:49:32,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 10:49:32,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:49:32,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-09 10:49:32,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:32,415 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 10:49:32,479 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:49:32,480 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 10:49:32,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 10:49:32,558 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 10:49:32,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 51 [2021-11-09 10:49:32,683 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 10:49:32,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-11-09 10:49:32,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:32,791 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-11-09 10:49:32,791 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 61 treesize of output 54 [2021-11-09 10:49:32,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~list~0.offset] [2021-11-09 10:49:32,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:49:32,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-11-09 10:49:32,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673223102] [2021-11-09 10:49:32,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 10:49:32,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:32,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 10:49:32,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1502, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 10:49:32,923 INFO L87 Difference]: Start difference. First operand 651 states and 705 transitions. Second operand has 36 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 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 10:49:39,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:39,455 INFO L93 Difference]: Finished difference Result 723 states and 781 transitions. [2021-11-09 10:49:39,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-09 10:49:39,455 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 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 67 [2021-11-09 10:49:39,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:39,458 INFO L225 Difference]: With dead ends: 723 [2021-11-09 10:49:39,458 INFO L226 Difference]: Without dead ends: 723 [2021-11-09 10:49:39,459 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1244, Invalid=5896, Unknown=0, NotChecked=0, Total=7140 [2021-11-09 10:49:39,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-11-09 10:49:39,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 651. [2021-11-09 10:49:39,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 637 states have (on average 1.1020408163265305) internal successors, (702), 647 states have internal predecessors, (702), 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 10:49:39,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 705 transitions. [2021-11-09 10:49:39,466 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 705 transitions. Word has length 67 [2021-11-09 10:49:39,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:39,467 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 705 transitions. [2021-11-09 10:49:39,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 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 10:49:39,467 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 705 transitions. [2021-11-09 10:49:39,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 10:49:39,468 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:39,468 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:49:39,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:39,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-09 10:49:39,669 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting mainErr22ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:49:39,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:39,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1222436392, now seen corresponding path program 1 times [2021-11-09 10:49:39,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:39,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506719481] [2021-11-09 10:49:39,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:39,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:41,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:49:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:41,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:41,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506719481] [2021-11-09 10:49:41,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506719481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:41,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613821753] [2021-11-09 10:49:41,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:41,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:41,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:41,085 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:41,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-09 10:49:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:44,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-09 10:49:44,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:44,328 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 10:49:44,339 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 19 treesize of output 15 [2021-11-09 10:49:44,408 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-09 10:49:44,408 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 10:49:44,487 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 10:49:44,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 10:49:44,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:49:44,578 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 61 [2021-11-09 10:49:44,581 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 80 treesize of output 75 [2021-11-09 10:49:44,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:44,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:49:44,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:44,766 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 10:49:44,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 100 treesize of output 84 [2021-11-09 10:49:44,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:44,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:44,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:49:44,774 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 1 case distinctions, treesize of input 96 treesize of output 98 [2021-11-09 10:49:45,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:45,041 INFO L354 Elim1Store]: treesize reduction 110, result has 32.1 percent of original size [2021-11-09 10:49:45,042 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 39 treesize of output 69 [2021-11-09 10:49:45,272 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 10:49:45,273 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 5 case distinctions, treesize of input 120 treesize of output 99 [2021-11-09 10:49:45,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:49:45,280 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 2 case distinctions, treesize of input 116 treesize of output 121 [2021-11-09 10:49:45,556 INFO L354 Elim1Store]: treesize reduction 172, result has 20.4 percent of original size [2021-11-09 10:49:45,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 216 treesize of output 141 [2021-11-09 10:49:45,595 INFO L354 Elim1Store]: treesize reduction 136, result has 26.5 percent of original size [2021-11-09 10:49:45,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 216 treesize of output 215 [2021-11-09 10:49:45,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:45,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:45,956 INFO L354 Elim1Store]: treesize reduction 172, result has 33.1 percent of original size [2021-11-09 10:49:45,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 56 treesize of output 105 [2021-11-09 10:49:46,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:46,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:46,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:49:46,204 INFO L354 Elim1Store]: treesize reduction 136, result has 14.5 percent of original size [2021-11-09 10:49:46,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 287 treesize of output 285 [2021-11-09 10:49:46,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:46,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:49:46,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:46,248 INFO L354 Elim1Store]: treesize reduction 176, result has 13.7 percent of original size [2021-11-09 10:49:46,248 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 18 case distinctions, treesize of input 274 treesize of output 178 [2021-11-09 10:49:48,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,393 INFO L354 Elim1Store]: treesize reduction 164, result has 44.6 percent of original size [2021-11-09 10:49:48,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 158 [2021-11-09 10:49:49,047 INFO L354 Elim1Store]: treesize reduction 324, result has 15.0 percent of original size [2021-11-09 10:49:49,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 237 treesize of output 254 [2021-11-09 10:49:49,782 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~y~0.base, main_~list~0.offset] [2021-11-09 10:49:49,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:49:49,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-09 10:49:49,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765807871] [2021-11-09 10:49:49,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 10:49:49,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:49,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 10:49:49,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2089, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 10:49:49,785 INFO L87 Difference]: Start difference. First operand 651 states and 705 transitions. Second operand has 30 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 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 10:49:55,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:55,757 INFO L93 Difference]: Finished difference Result 685 states and 739 transitions. [2021-11-09 10:49:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 10:49:55,758 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 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 67 [2021-11-09 10:49:55,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:55,761 INFO L225 Difference]: With dead ends: 685 [2021-11-09 10:49:55,761 INFO L226 Difference]: Without dead ends: 685 [2021-11-09 10:49:55,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=739, Invalid=5423, Unknown=0, NotChecked=0, Total=6162 [2021-11-09 10:49:55,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-11-09 10:49:55,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 659. [2021-11-09 10:49:55,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 645 states have (on average 1.1007751937984496) internal successors, (710), 655 states have internal predecessors, (710), 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 10:49:55,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 713 transitions. [2021-11-09 10:49:55,770 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 713 transitions. Word has length 67 [2021-11-09 10:49:55,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:55,771 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 713 transitions. [2021-11-09 10:49:55,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 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 10:49:55,771 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 713 transitions. [2021-11-09 10:49:55,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 10:49:55,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:55,772 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:49:55,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:55,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:55,997 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting mainErr22ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:49:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:55,998 INFO L85 PathProgramCache]: Analyzing trace with hash 934532062, now seen corresponding path program 2 times [2021-11-09 10:49:55,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:55,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971295800] [2021-11-09 10:49:55,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:55,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:57,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:49:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:57,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:57,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971295800] [2021-11-09 10:49:57,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971295800] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:57,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041180757] [2021-11-09 10:49:57,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:49:57,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:57,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:57,822 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:57,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-09 10:50:00,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:50:00,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:00,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-09 10:50:00,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:01,018 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 10:50:01,029 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 19 treesize of output 15 [2021-11-09 10:50:01,092 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-09 10:50:01,092 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 10:50:01,169 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 29 treesize of output 24 [2021-11-09 10:50:01,179 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 10:50:01,272 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-09 10:50:01,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 73 [2021-11-09 10:50:01,282 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-09 10:50:01,283 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 92 treesize of output 82 [2021-11-09 10:50:01,437 INFO L354 Elim1Store]: treesize reduction 110, result has 32.1 percent of original size [2021-11-09 10:50:01,437 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 39 treesize of output 69 [2021-11-09 10:50:01,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:01,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:01,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:50:01,593 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 10:50:01,593 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 4 new quantified variables, introduced 4 case distinctions, treesize of input 127 treesize of output 99 [2021-11-09 10:50:01,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:01,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:01,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:50:01,600 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 1 case distinctions, treesize of input 138 treesize of output 140 [2021-11-09 10:50:01,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:01,990 INFO L354 Elim1Store]: treesize reduction 140, result has 33.0 percent of original size [2021-11-09 10:50:01,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 48 treesize of output 89 [2021-11-09 10:50:02,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:50:02,178 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 159 treesize of output 161 [2021-11-09 10:50:02,185 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 10:50:02,185 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 5 case distinctions, treesize of input 155 treesize of output 106 [2021-11-09 10:50:02,471 INFO L354 Elim1Store]: treesize reduction 180, result has 16.7 percent of original size [2021-11-09 10:50:02,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 275 treesize of output 144 [2021-11-09 10:50:02,496 INFO L354 Elim1Store]: treesize reduction 120, result has 22.1 percent of original size [2021-11-09 10:50:02,497 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 267 treesize of output 263 [2021-11-09 10:50:02,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:02,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:50:02,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:02,879 INFO L354 Elim1Store]: treesize reduction 176, result has 13.7 percent of original size [2021-11-09 10:50:02,879 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 18 case distinctions, treesize of input 287 treesize of output 167 [2021-11-09 10:50:02,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:02,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:02,897 INFO L354 Elim1Store]: treesize reduction 103, result has 9.6 percent of original size [2021-11-09 10:50:02,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 283 treesize of output 286 [2021-11-09 10:50:04,566 INFO L354 Elim1Store]: treesize reduction 360, result has 12.8 percent of original size [2021-11-09 10:50:04,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 285 treesize of output 294 [2021-11-09 10:50:04,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~y~0.base, main_~list~0.offset] [2021-11-09 10:50:04,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:50:04,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-11-09 10:50:04,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531217608] [2021-11-09 10:50:04,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 10:50:04,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:04,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 10:50:04,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2225, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 10:50:04,844 INFO L87 Difference]: Start difference. First operand 659 states and 713 transitions. Second operand has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 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 10:50:13,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:13,439 INFO L93 Difference]: Finished difference Result 671 states and 723 transitions. [2021-11-09 10:50:13,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-09 10:50:13,439 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 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 67 [2021-11-09 10:50:13,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:13,442 INFO L225 Difference]: With dead ends: 671 [2021-11-09 10:50:13,442 INFO L226 Difference]: Without dead ends: 671 [2021-11-09 10:50:13,443 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1787 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=942, Invalid=6198, Unknown=0, NotChecked=0, Total=7140 [2021-11-09 10:50:13,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-11-09 10:50:13,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 659. [2021-11-09 10:50:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 645 states have (on average 1.0976744186046512) internal successors, (708), 655 states have internal predecessors, (708), 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 10:50:13,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 711 transitions. [2021-11-09 10:50:13,450 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 711 transitions. Word has length 67 [2021-11-09 10:50:13,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:13,451 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 711 transitions. [2021-11-09 10:50:13,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 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 10:50:13,451 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 711 transitions. [2021-11-09 10:50:13,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-09 10:50:13,454 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:13,455 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:13,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:13,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:13,679 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 22 more)] === [2021-11-09 10:50:13,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:13,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1484670310, now seen corresponding path program 1 times [2021-11-09 10:50:13,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:13,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274421227] [2021-11-09 10:50:13,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:13,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:14,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:50:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:14,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:14,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274421227] [2021-11-09 10:50:14,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274421227] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:14,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843940795] [2021-11-09 10:50:14,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:14,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:14,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:14,869 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:14,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c71f353-e96b-4480-a62f-6b4baa054348/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-09 10:50:18,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:18,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-09 10:50:18,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:18,256 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 10:50:18,262 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 10:50:18,348 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:50:18,348 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 10:50:18,368 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:50:18,369 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 10:50:18,455 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 10:50:18,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 10:50:18,566 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-09 10:50:18,567 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 84 treesize of output 62 [2021-11-09 10:50:18,575 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-09 10:50:18,576 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 76 treesize of output 66 [2021-11-09 10:50:18,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:50:18,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 67 [2021-11-09 10:50:18,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:50:18,720 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 1 case distinctions, treesize of input 74 treesize of output 76 [2021-11-09 10:50:18,953 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-09 10:50:18,953 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 10:50:18,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-09 10:50:19,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:50:19,096 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 2 case distinctions, treesize of input 100 treesize of output 105 [2021-11-09 10:50:19,101 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:50:19,102 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 96 treesize of output 84 [2021-11-09 10:50:19,326 INFO L354 Elim1Store]: treesize reduction 118, result has 28.5 percent of original size [2021-11-09 10:50:19,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 194 treesize of output 138 [2021-11-09 10:50:19,378 INFO L354 Elim1Store]: treesize reduction 112, result has 26.8 percent of original size [2021-11-09 10:50:19,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 167 treesize of output 166 [2021-11-09 10:50:19,917 INFO L354 Elim1Store]: treesize reduction 130, result has 13.9 percent of original size [2021-11-09 10:50:19,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 189 treesize of output 163 [2021-11-09 10:50:19,947 INFO L354 Elim1Store]: treesize reduction 124, result has 15.6 percent of original size [2021-11-09 10:50:19,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 185 treesize of output 183 [2021-11-09 10:50:20,623 INFO L354 Elim1Store]: treesize reduction 44, result has 27.9 percent of original size [2021-11-09 10:50:20,623 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 101 treesize of output 105 [2021-11-09 10:50:20,653 INFO L354 Elim1Store]: treesize reduction 86, result has 18.9 percent of original size [2021-11-09 10:50:20,654 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 6 case distinctions, treesize of input 93 treesize of output 101 [2021-11-09 10:50:20,959 INFO L354 Elim1Store]: treesize reduction 156, result has 11.9 percent of original size [2021-11-09 10:50:20,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 201 treesize of output 178 [2021-11-09 10:50:20,996 INFO L354 Elim1Store]: treesize reduction 152, result has 13.1 percent of original size [2021-11-09 10:50:20,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 197 treesize of output 198 [2021-11-09 10:50:21,659 INFO L354 Elim1Store]: treesize reduction 310, result has 18.8 percent of original size [2021-11-09 10:50:21,659 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 10 new quantified variables, introduced 28 case distinctions, treesize of input 282 treesize of output 230 [2021-11-09 10:50:21,767 INFO L354 Elim1Store]: treesize reduction 440, result has 16.3 percent of original size [2021-11-09 10:50:21,767 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 9 new quantified variables, introduced 28 case distinctions, treesize of input 363 treesize of output 326 [2021-11-09 10:50:32,222 INFO L354 Elim1Store]: treesize reduction 148, result has 29.2 percent of original size [2021-11-09 10:50:32,222 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 10 case distinctions, treesize of input 316 treesize of output 355 [2021-11-09 10:51:04,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:51:04,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:04,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:04,139 INFO L354 Elim1Store]: treesize reduction 452, result has 10.5 percent of original size [2021-11-09 10:51:04,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 369 treesize of output 372 [2021-11-09 10:51:04,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:51:04,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:04,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:04,233 INFO L354 Elim1Store]: treesize reduction 320, result has 9.9 percent of original size [2021-11-09 10:51:04,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 32 case distinctions, treesize of input 356 treesize of output 258