./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0234-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0234-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2e40f9e7b474ba5b84186650c7060a1f3eed5394bab52ac2eaa493135efa417c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:42:22,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:42:22,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:42:22,444 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:42:22,446 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:42:22,447 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:42:22,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:42:22,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:42:22,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:42:22,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:42:22,458 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:42:22,460 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:42:22,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:42:22,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:42:22,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:42:22,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:42:22,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:42:22,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:42:22,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:42:22,475 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:42:22,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:42:22,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:42:22,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:42:22,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:42:22,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:42:22,505 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:42:22,506 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:42:22,507 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:42:22,509 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:42:22,511 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:42:22,512 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:42:22,513 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:42:22,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:42:22,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:42:22,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:42:22,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:42:22,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:42:22,521 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:42:22,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:42:22,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:42:22,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:42:22,525 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-19 04:42:22,575 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:42:22,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:42:22,576 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:42:22,576 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:42:22,577 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:42:22,577 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:42:22,578 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:42:22,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:42:22,579 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:42:22,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:42:22,580 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:42:22,580 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 04:42:22,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:42:22,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:42:22,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:42:22,581 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-19 04:42:22,581 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-19 04:42:22,582 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-19 04:42:22,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:42:22,582 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 04:42:22,583 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:42:22,583 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:42:22,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:42:22,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:42:22,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:42:22,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:42:22,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:42:22,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:42:22,585 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:42:22,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:42:22,586 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:42:22,586 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_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e40f9e7b474ba5b84186650c7060a1f3eed5394bab52ac2eaa493135efa417c [2021-11-19 04:42:22,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:42:23,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:42:23,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:42:23,009 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:42:23,010 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:42:23,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/memsafety/test-0234-1.i [2021-11-19 04:42:23,149 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/data/ecf37aaad/6783c5d3867f4ff69dd2d2d865bc5b91/FLAG9fd2a98b3 [2021-11-19 04:42:23,752 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:42:23,753 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/sv-benchmarks/c/memsafety/test-0234-1.i [2021-11-19 04:42:23,775 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/data/ecf37aaad/6783c5d3867f4ff69dd2d2d865bc5b91/FLAG9fd2a98b3 [2021-11-19 04:42:24,009 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/data/ecf37aaad/6783c5d3867f4ff69dd2d2d865bc5b91 [2021-11-19 04:42:24,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:42:24,014 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-19 04:42:24,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:42:24,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:42:24,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:42:24,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:42:24" (1/1) ... [2021-11-19 04:42:24,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2397cb2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:42:24, skipping insertion in model container [2021-11-19 04:42:24,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:42:24" (1/1) ... [2021-11-19 04:42:24,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:42:24,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:42:24,625 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:42:24,634 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:42:24,696 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:42:24,743 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:42:24,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:42:24 WrapperNode [2021-11-19 04:42:24,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:42:24,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:42:24,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:42:24,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:42:24,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:42:24" (1/1) ... [2021-11-19 04:42:24,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:42:24" (1/1) ... [2021-11-19 04:42:24,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:42:24" (1/1) ... [2021-11-19 04:42:24,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:42:24" (1/1) ... [2021-11-19 04:42:24,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:42:24" (1/1) ... [2021-11-19 04:42:24,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:42:24" (1/1) ... [2021-11-19 04:42:24,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:42:24" (1/1) ... [2021-11-19 04:42:24,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:42:24,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:42:24,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:42:24,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:42:24,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:42:24" (1/1) ... [2021-11-19 04:42:24,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:42:24,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:42:24,922 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:42:24,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:42:24,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-19 04:42:24,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:42:24,989 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-19 04:42:24,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-19 04:42:24,990 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-19 04:42:24,991 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-19 04:42:24,991 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-19 04:42:24,991 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-19 04:42:24,991 INFO L138 BoogieDeclarations]: Found implementation of procedure calloc_model [2021-11-19 04:42:24,992 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2021-11-19 04:42:24,993 INFO L138 BoogieDeclarations]: Found implementation of procedure l4_insert [2021-11-19 04:42:24,993 INFO L138 BoogieDeclarations]: Found implementation of procedure l3_insert [2021-11-19 04:42:24,993 INFO L138 BoogieDeclarations]: Found implementation of procedure l2_insert [2021-11-19 04:42:24,993 INFO L138 BoogieDeclarations]: Found implementation of procedure l1_insert [2021-11-19 04:42:24,993 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_insert [2021-11-19 04:42:24,994 INFO L138 BoogieDeclarations]: Found implementation of procedure l4_destroy [2021-11-19 04:42:24,994 INFO L138 BoogieDeclarations]: Found implementation of procedure l3_destroy [2021-11-19 04:42:24,994 INFO L138 BoogieDeclarations]: Found implementation of procedure l2_destroy [2021-11-19 04:42:24,994 INFO L138 BoogieDeclarations]: Found implementation of procedure l1_destroy [2021-11-19 04:42:24,995 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2021-11-19 04:42:24,995 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-19 04:42:24,995 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 04:42:24,995 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-19 04:42:24,996 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-19 04:42:24,996 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-19 04:42:24,996 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-19 04:42:24,996 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-19 04:42:24,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:42:24,997 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-19 04:42:24,997 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-19 04:42:24,997 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-19 04:42:24,998 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-19 04:42:24,998 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-19 04:42:24,998 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-19 04:42:24,998 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-19 04:42:24,998 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-19 04:42:24,999 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-19 04:42:25,000 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-19 04:42:25,000 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-19 04:42:25,000 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-19 04:42:25,000 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-19 04:42:25,001 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-19 04:42:25,001 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-19 04:42:25,001 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-19 04:42:25,002 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-19 04:42:25,002 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-19 04:42:25,002 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-19 04:42:25,002 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-19 04:42:25,003 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-19 04:42:25,003 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-19 04:42:25,004 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-19 04:42:25,004 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-19 04:42:25,004 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-19 04:42:25,005 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-19 04:42:25,005 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-19 04:42:25,005 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-19 04:42:25,005 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-19 04:42:25,006 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-19 04:42:25,006 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-19 04:42:25,006 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-19 04:42:25,007 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-19 04:42:25,007 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-19 04:42:25,007 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-19 04:42:25,007 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-19 04:42:25,008 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-19 04:42:25,008 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-19 04:42:25,009 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-19 04:42:25,010 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-19 04:42:25,010 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-19 04:42:25,011 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-19 04:42:25,011 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-19 04:42:25,011 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-19 04:42:25,012 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-19 04:42:25,012 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-19 04:42:25,012 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-19 04:42:25,012 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-19 04:42:25,012 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-19 04:42:25,013 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-19 04:42:25,013 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-19 04:42:25,013 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-19 04:42:25,013 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-19 04:42:25,013 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-19 04:42:25,014 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-19 04:42:25,014 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-19 04:42:25,014 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-19 04:42:25,014 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-19 04:42:25,014 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-19 04:42:25,015 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-19 04:42:25,015 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-19 04:42:25,015 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-19 04:42:25,015 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-19 04:42:25,016 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-19 04:42:25,016 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-19 04:42:25,016 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-19 04:42:25,016 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-19 04:42:25,016 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-19 04:42:25,017 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-19 04:42:25,017 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-19 04:42:25,017 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-19 04:42:25,017 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-19 04:42:25,017 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-19 04:42:25,018 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-19 04:42:25,018 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-19 04:42:25,018 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-19 04:42:25,019 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-19 04:42:25,019 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-19 04:42:25,019 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-19 04:42:25,020 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-19 04:42:25,020 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-19 04:42:25,020 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-19 04:42:25,020 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-19 04:42:25,021 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-19 04:42:25,022 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-19 04:42:25,022 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-19 04:42:25,022 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-19 04:42:25,023 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-19 04:42:25,023 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-19 04:42:25,023 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-19 04:42:25,023 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-19 04:42:25,024 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-19 04:42:25,024 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-19 04:42:25,024 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-19 04:42:25,024 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-19 04:42:25,025 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-19 04:42:25,026 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-19 04:42:25,026 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-19 04:42:25,027 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-19 04:42:25,027 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-19 04:42:25,030 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-19 04:42:25,031 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-19 04:42:25,031 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-19 04:42:25,031 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-19 04:42:25,032 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-19 04:42:25,033 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-19 04:42:25,033 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-11-19 04:42:25,033 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2021-11-19 04:42:25,034 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2021-11-19 04:42:25,042 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-11-19 04:42:25,042 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-19 04:42:25,043 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2021-11-19 04:42:25,043 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-11-19 04:42:25,043 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-19 04:42:25,043 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-11-19 04:42:25,043 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2021-11-19 04:42:25,044 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-11-19 04:42:25,044 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-19 04:42:25,044 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2021-11-19 04:42:25,044 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2021-11-19 04:42:25,045 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2021-11-19 04:42:25,045 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2021-11-19 04:42:25,045 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2021-11-19 04:42:25,045 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2021-11-19 04:42:25,045 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-11-19 04:42:25,046 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-11-19 04:42:25,046 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2021-11-19 04:42:25,046 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2021-11-19 04:42:25,046 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2021-11-19 04:42:25,047 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-11-19 04:42:25,047 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2021-11-19 04:42:25,047 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2021-11-19 04:42:25,047 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2021-11-19 04:42:25,047 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-11-19 04:42:25,048 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2021-11-19 04:42:25,048 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2021-11-19 04:42:25,049 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2021-11-19 04:42:25,049 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2021-11-19 04:42:25,049 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2021-11-19 04:42:25,050 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2021-11-19 04:42:25,050 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2021-11-19 04:42:25,050 INFO L130 BoogieDeclarations]: Found specification of procedure index [2021-11-19 04:42:25,050 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2021-11-19 04:42:25,050 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2021-11-19 04:42:25,051 INFO L130 BoogieDeclarations]: Found specification of procedure ffsl [2021-11-19 04:42:25,051 INFO L130 BoogieDeclarations]: Found specification of procedure ffsll [2021-11-19 04:42:25,051 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-11-19 04:42:25,051 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2021-11-19 04:42:25,052 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp_l [2021-11-19 04:42:25,052 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp_l [2021-11-19 04:42:25,052 INFO L130 BoogieDeclarations]: Found specification of procedure explicit_bzero [2021-11-19 04:42:25,052 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2021-11-19 04:42:25,052 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2021-11-19 04:42:25,053 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2021-11-19 04:42:25,053 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2021-11-19 04:42:25,053 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2021-11-19 04:42:25,053 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2021-11-19 04:42:25,053 INFO L130 BoogieDeclarations]: Found specification of procedure calloc_model [2021-11-19 04:42:25,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 04:42:25,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 04:42:25,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-19 04:42:25,054 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2021-11-19 04:42:25,054 INFO L130 BoogieDeclarations]: Found specification of procedure l4_insert [2021-11-19 04:42:25,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 04:42:25,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 04:42:25,055 INFO L130 BoogieDeclarations]: Found specification of procedure l3_insert [2021-11-19 04:42:25,055 INFO L130 BoogieDeclarations]: Found specification of procedure l2_insert [2021-11-19 04:42:25,056 INFO L130 BoogieDeclarations]: Found specification of procedure l1_insert [2021-11-19 04:42:25,056 INFO L130 BoogieDeclarations]: Found specification of procedure l0_insert [2021-11-19 04:42:25,056 INFO L130 BoogieDeclarations]: Found specification of procedure l4_destroy [2021-11-19 04:42:25,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:42:25,056 INFO L130 BoogieDeclarations]: Found specification of procedure l3_destroy [2021-11-19 04:42:25,057 INFO L130 BoogieDeclarations]: Found specification of procedure l2_destroy [2021-11-19 04:42:25,057 INFO L130 BoogieDeclarations]: Found specification of procedure l1_destroy [2021-11-19 04:42:25,057 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2021-11-19 04:42:25,057 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-19 04:42:25,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-19 04:42:25,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 04:42:25,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:42:25,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 04:42:25,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:42:25,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 04:42:25,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 04:42:25,481 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:42:25,483 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:42:25,753 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 04:42:26,154 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:42:26,180 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:42:26,183 INFO L301 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-19 04:42:26,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:42:26 BoogieIcfgContainer [2021-11-19 04:42:26,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:42:26,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:42:26,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:42:26,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:42:26,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:42:24" (1/3) ... [2021-11-19 04:42:26,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78469f2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:42:26, skipping insertion in model container [2021-11-19 04:42:26,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:42:24" (2/3) ... [2021-11-19 04:42:26,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78469f2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:42:26, skipping insertion in model container [2021-11-19 04:42:26,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:42:26" (3/3) ... [2021-11-19 04:42:26,206 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0234-1.i [2021-11-19 04:42:26,212 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:42:26,212 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 75 error locations. [2021-11-19 04:42:26,273 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:42:26,288 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 04:42:26,289 INFO L340 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2021-11-19 04:42:26,310 INFO L276 IsEmpty]: Start isEmpty. Operand has 227 states, 122 states have (on average 1.7459016393442623) internal successors, (213), 192 states have internal predecessors, (213), 20 states have call successors, (20), 15 states have call predecessors, (20), 15 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-19 04:42:26,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-19 04:42:26,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:26,319 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:42:26,319 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:42:26,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:26,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1439172705, now seen corresponding path program 1 times [2021-11-19 04:42:26,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:42:26,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300660207] [2021-11-19 04:42:26,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:26,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:42:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:42:26,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:42:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:42:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:42:26,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:42:26,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300660207] [2021-11-19 04:42:26,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300660207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:42:26,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:42:26,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:42:26,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064548688] [2021-11-19 04:42:26,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:42:26,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:42:26,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:42:26,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:42:26,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:42:26,609 INFO L87 Difference]: Start difference. First operand has 227 states, 122 states have (on average 1.7459016393442623) internal successors, (213), 192 states have internal predecessors, (213), 20 states have call successors, (20), 15 states have call predecessors, (20), 15 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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) [2021-11-19 04:42:27,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:42:27,108 INFO L93 Difference]: Finished difference Result 253 states and 273 transitions. [2021-11-19 04:42:27,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:42:27,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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 [2021-11-19 04:42:27,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:42:27,131 INFO L225 Difference]: With dead ends: 253 [2021-11-19 04:42:27,132 INFO L226 Difference]: Without dead ends: 250 [2021-11-19 04:42:27,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:42:27,140 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 36 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:42:27,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 242 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:42:27,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-11-19 04:42:27,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 224. [2021-11-19 04:42:27,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 116 states have (on average 1.7241379310344827) internal successors, (200), 190 states have internal predecessors, (200), 20 states have call successors, (20), 15 states have call predecessors, (20), 14 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-19 04:42:27,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 239 transitions. [2021-11-19 04:42:27,235 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 239 transitions. Word has length 7 [2021-11-19 04:42:27,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:42:27,236 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 239 transitions. [2021-11-19 04:42:27,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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) [2021-11-19 04:42:27,237 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 239 transitions. [2021-11-19 04:42:27,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 04:42:27,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:27,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:42:27,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:42:27,238 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting calloc_modelErr0REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:42:27,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:27,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1247502059, now seen corresponding path program 1 times [2021-11-19 04:42:27,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:42:27,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428763669] [2021-11-19 04:42:27,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:27,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:42:27,292 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:42:27,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099434846] [2021-11-19 04:42:27,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:27,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:42:27,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:42:27,320 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:42:27,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:42:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:42:27,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 04:42:27,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:42:27,567 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 [2021-11-19 04:42:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:42:27,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:42:27,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:42:27,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428763669] [2021-11-19 04:42:27,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:42:27,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099434846] [2021-11-19 04:42:27,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099434846] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:42:27,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:42:27,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:42:27,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295384172] [2021-11-19 04:42:27,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:42:27,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:42:27,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:42:27,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:42:27,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:42:27,578 INFO L87 Difference]: Start difference. First operand 224 states and 239 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:42:27,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:42:27,677 INFO L93 Difference]: Finished difference Result 223 states and 238 transitions. [2021-11-19 04:42:27,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:42:27,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-19 04:42:27,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:42:27,680 INFO L225 Difference]: With dead ends: 223 [2021-11-19 04:42:27,680 INFO L226 Difference]: Without dead ends: 223 [2021-11-19 04:42:27,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:42:27,682 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 3 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:42:27,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 398 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:42:27,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-19 04:42:27,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-11-19 04:42:27,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 116 states have (on average 1.7155172413793103) internal successors, (199), 189 states have internal predecessors, (199), 20 states have call successors, (20), 15 states have call predecessors, (20), 14 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-19 04:42:27,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 238 transitions. [2021-11-19 04:42:27,698 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 238 transitions. Word has length 12 [2021-11-19 04:42:27,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:42:27,698 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 238 transitions. [2021-11-19 04:42:27,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:42:27,699 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 238 transitions. [2021-11-19 04:42:27,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 04:42:27,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:27,700 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:42:27,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:42:27,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:42:27,915 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting calloc_modelErr1REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:42:27,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:27,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1247502060, now seen corresponding path program 1 times [2021-11-19 04:42:27,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:42:27,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259346352] [2021-11-19 04:42:27,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:27,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:42:27,940 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:42:27,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881048289] [2021-11-19 04:42:27,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:27,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:42:27,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:42:27,942 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:42:27,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:42:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:42:28,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 04:42:28,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:42:28,203 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 8 treesize of output 7 [2021-11-19 04:42:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:42:28,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:42:28,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:42:28,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259346352] [2021-11-19 04:42:28,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:42:28,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881048289] [2021-11-19 04:42:28,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881048289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:42:28,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:42:28,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:42:28,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521304977] [2021-11-19 04:42:28,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:42:28,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:42:28,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:42:28,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:42:28,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:42:28,225 INFO L87 Difference]: Start difference. First operand 223 states and 238 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:42:28,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:42:28,341 INFO L93 Difference]: Finished difference Result 222 states and 237 transitions. [2021-11-19 04:42:28,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:42:28,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-19 04:42:28,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:42:28,344 INFO L225 Difference]: With dead ends: 222 [2021-11-19 04:42:28,344 INFO L226 Difference]: Without dead ends: 222 [2021-11-19 04:42:28,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:42:28,350 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 2 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:42:28,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 411 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:42:28,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-19 04:42:28,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-11-19 04:42:28,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 115 states have (on average 1.7217391304347827) internal successors, (198), 188 states have internal predecessors, (198), 20 states have call successors, (20), 15 states have call predecessors, (20), 14 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-19 04:42:28,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 237 transitions. [2021-11-19 04:42:28,369 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 237 transitions. Word has length 12 [2021-11-19 04:42:28,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:42:28,370 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 237 transitions. [2021-11-19 04:42:28,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:42:28,370 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 237 transitions. [2021-11-19 04:42:28,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 04:42:28,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:28,378 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:42:28,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:42:28,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:42:28,607 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting l4_insertErr0REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:42:28,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:28,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1165065815, now seen corresponding path program 1 times [2021-11-19 04:42:28,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:42:28,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152120000] [2021-11-19 04:42:28,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:28,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:42:28,636 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:42:28,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471011284] [2021-11-19 04:42:28,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:28,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:42:28,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:42:28,638 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:42:28,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:42:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:42:28,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-19 04:42:28,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:42:29,337 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 [2021-11-19 04:42:29,531 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 04:42:29,531 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 [2021-11-19 04:42:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 113 proven. 7 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-19 04:42:29,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:42:29,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:42:29,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152120000] [2021-11-19 04:42:29,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:42:29,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471011284] [2021-11-19 04:42:29,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471011284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:42:29,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:42:29,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-19 04:42:29,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100461928] [2021-11-19 04:42:29,917 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:42:29,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:42:29,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:42:29,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:42:29,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:42:29,921 INFO L87 Difference]: Start difference. First operand 222 states and 237 transitions. Second operand has 14 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (17), 3 states have call predecessors, (17), 5 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 04:42:30,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:42:30,424 INFO L93 Difference]: Finished difference Result 246 states and 266 transitions. [2021-11-19 04:42:30,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:42:30,425 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (17), 3 states have call predecessors, (17), 5 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 123 [2021-11-19 04:42:30,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:42:30,429 INFO L225 Difference]: With dead ends: 246 [2021-11-19 04:42:30,429 INFO L226 Difference]: Without dead ends: 246 [2021-11-19 04:42:30,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 114 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-11-19 04:42:30,435 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 74 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:42:30,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 1044 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 508 Invalid, 0 Unknown, 107 Unchecked, 0.3s Time] [2021-11-19 04:42:30,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-19 04:42:30,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 220. [2021-11-19 04:42:30,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 115 states have (on average 1.7043478260869565) internal successors, (196), 186 states have internal predecessors, (196), 20 states have call successors, (20), 15 states have call predecessors, (20), 14 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-19 04:42:30,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 235 transitions. [2021-11-19 04:42:30,467 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 235 transitions. Word has length 123 [2021-11-19 04:42:30,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:42:30,471 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 235 transitions. [2021-11-19 04:42:30,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (17), 3 states have call predecessors, (17), 5 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 04:42:30,471 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 235 transitions. [2021-11-19 04:42:30,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 04:42:30,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:30,475 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:42:30,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:42:30,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:42:30,699 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting l4_insertErr1REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:42:30,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:30,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1165065816, now seen corresponding path program 1 times [2021-11-19 04:42:30,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:42:30,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437498574] [2021-11-19 04:42:30,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:30,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:42:30,725 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:42:30,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770452205] [2021-11-19 04:42:30,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:30,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:42:30,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:42:30,727 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:42:30,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:42:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:42:31,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-19 04:42:31,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:42:32,504 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 14 treesize of output 13 [2021-11-19 04:42:32,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-11-19 04:42:32,786 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-19 04:42:32,786 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 39 treesize of output 41 [2021-11-19 04:42:32,804 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 04:42:32,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-11-19 04:42:35,922 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 98 proven. 13 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-19 04:42:35,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:42:36,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:42:36,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437498574] [2021-11-19 04:42:36,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:42:36,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770452205] [2021-11-19 04:42:36,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770452205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:42:36,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:42:36,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-19 04:42:36,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471259731] [2021-11-19 04:42:36,362 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:42:36,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 04:42:36,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:42:36,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 04:42:36,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-11-19 04:42:36,364 INFO L87 Difference]: Start difference. First operand 220 states and 235 transitions. Second operand has 18 states, 13 states have (on average 3.230769230769231) internal successors, (42), 14 states have internal predecessors, (42), 6 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-19 04:42:37,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:42:37,289 INFO L93 Difference]: Finished difference Result 271 states and 299 transitions. [2021-11-19 04:42:37,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 04:42:37,292 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 3.230769230769231) internal successors, (42), 14 states have internal predecessors, (42), 6 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 123 [2021-11-19 04:42:37,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:42:37,295 INFO L225 Difference]: With dead ends: 271 [2021-11-19 04:42:37,295 INFO L226 Difference]: Without dead ends: 271 [2021-11-19 04:42:37,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-11-19 04:42:37,298 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 54 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1822 SdHoareTripleChecker+Invalid, 1793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1283 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:42:37,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 1822 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 484 Invalid, 0 Unknown, 1283 Unchecked, 0.4s Time] [2021-11-19 04:42:37,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-11-19 04:42:37,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 233. [2021-11-19 04:42:37,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 124 states have (on average 1.6612903225806452) internal successors, (206), 195 states have internal predecessors, (206), 21 states have call successors, (21), 15 states have call predecessors, (21), 17 states have return successors, (29), 23 states have call predecessors, (29), 20 states have call successors, (29) [2021-11-19 04:42:37,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 256 transitions. [2021-11-19 04:42:37,320 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 256 transitions. Word has length 123 [2021-11-19 04:42:37,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:42:37,321 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 256 transitions. [2021-11-19 04:42:37,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 3.230769230769231) internal successors, (42), 14 states have internal predecessors, (42), 6 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-19 04:42:37,321 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 256 transitions. [2021-11-19 04:42:37,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-19 04:42:37,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:37,324 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:42:37,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:42:37,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:42:37,551 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting l4_insertErr1REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:42:37,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:37,551 INFO L85 PathProgramCache]: Analyzing trace with hash -2041787438, now seen corresponding path program 1 times [2021-11-19 04:42:37,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:42:37,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844297924] [2021-11-19 04:42:37,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:37,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:42:37,577 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:42:37,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665169006] [2021-11-19 04:42:37,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:37,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:42:37,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:42:37,579 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:42:37,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 04:42:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:42:37,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-19 04:42:37,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:42:38,133 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 8 treesize of output 7 [2021-11-19 04:42:38,733 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 14 treesize of output 13 [2021-11-19 04:42:38,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-11-19 04:42:38,950 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-19 04:42:38,950 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 36 treesize of output 36 [2021-11-19 04:42:38,974 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 04:42:38,975 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 35 treesize of output 35 [2021-11-19 04:42:41,120 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 102 proven. 14 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-19 04:42:41,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:42:41,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:42:41,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844297924] [2021-11-19 04:42:41,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:42:41,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665169006] [2021-11-19 04:42:41,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665169006] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:42:41,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:42:41,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-19 04:42:41,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552878604] [2021-11-19 04:42:41,336 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:42:41,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 04:42:41,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:42:41,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 04:42:41,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:42:41,338 INFO L87 Difference]: Start difference. First operand 233 states and 256 transitions. Second operand has 16 states, 11 states have (on average 3.909090909090909) internal successors, (43), 12 states have internal predecessors, (43), 6 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-19 04:42:43,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:42:43,314 INFO L93 Difference]: Finished difference Result 258 states and 286 transitions. [2021-11-19 04:42:43,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:42:43,318 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 3.909090909090909) internal successors, (43), 12 states have internal predecessors, (43), 6 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 124 [2021-11-19 04:42:43,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:42:43,324 INFO L225 Difference]: With dead ends: 258 [2021-11-19 04:42:43,328 INFO L226 Difference]: Without dead ends: 258 [2021-11-19 04:42:43,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 107 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-11-19 04:42:43,330 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 34 mSDsluCounter, 1396 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 642 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:42:43,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1601 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 990 Invalid, 0 Unknown, 642 Unchecked, 1.2s Time] [2021-11-19 04:42:43,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-19 04:42:43,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 219. [2021-11-19 04:42:43,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 115 states have (on average 1.6956521739130435) internal successors, (195), 185 states have internal predecessors, (195), 20 states have call successors, (20), 15 states have call predecessors, (20), 14 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-19 04:42:43,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 234 transitions. [2021-11-19 04:42:43,344 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 234 transitions. Word has length 124 [2021-11-19 04:42:43,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:42:43,346 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 234 transitions. [2021-11-19 04:42:43,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 3.909090909090909) internal successors, (43), 12 states have internal predecessors, (43), 6 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-19 04:42:43,346 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 234 transitions. [2021-11-19 04:42:43,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 04:42:43,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:43,349 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:42:43,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 04:42:43,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:42:43,563 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting l4_insertErr2REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:42:43,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:43,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1358206440, now seen corresponding path program 1 times [2021-11-19 04:42:43,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:42:43,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434420645] [2021-11-19 04:42:43,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:43,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:42:43,586 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:42:43,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540687200] [2021-11-19 04:42:43,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:43,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:42:43,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:42:43,609 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:42:43,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 04:42:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:42:43,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-19 04:42:43,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:42:44,302 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-19 04:42:44,472 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-19 04:42:44,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-19 04:42:44,580 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 [2021-11-19 04:42:44,719 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-19 04:42:44,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-19 04:42:44,782 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 143 proven. 26 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-19 04:42:44,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:42:45,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:42:45,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434420645] [2021-11-19 04:42:45,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:42:45,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540687200] [2021-11-19 04:42:45,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540687200] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:42:45,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:42:45,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-19 04:42:45,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741042089] [2021-11-19 04:42:45,029 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:42:45,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 04:42:45,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:42:45,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 04:42:45,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-11-19 04:42:45,031 INFO L87 Difference]: Start difference. First operand 219 states and 234 transitions. Second operand has 19 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 15 states have internal predecessors, (53), 7 states have call successors, (18), 4 states have call predecessors, (18), 7 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-19 04:42:45,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:42:45,475 INFO L93 Difference]: Finished difference Result 253 states and 277 transitions. [2021-11-19 04:42:45,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:42:45,475 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 15 states have internal predecessors, (53), 7 states have call successors, (18), 4 states have call predecessors, (18), 7 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 125 [2021-11-19 04:42:45,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:42:45,479 INFO L225 Difference]: With dead ends: 253 [2021-11-19 04:42:45,479 INFO L226 Difference]: Without dead ends: 253 [2021-11-19 04:42:45,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 111 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-11-19 04:42:45,480 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 53 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:42:45,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 907 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 429 Invalid, 0 Unknown, 117 Unchecked, 0.3s Time] [2021-11-19 04:42:45,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-19 04:42:45,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 227. [2021-11-19 04:42:45,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 120 states have (on average 1.675) internal successors, (201), 190 states have internal predecessors, (201), 23 states have call successors, (23), 16 states have call predecessors, (23), 14 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-19 04:42:45,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 246 transitions. [2021-11-19 04:42:45,491 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 246 transitions. Word has length 125 [2021-11-19 04:42:45,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:42:45,492 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 246 transitions. [2021-11-19 04:42:45,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 15 states have internal predecessors, (53), 7 states have call successors, (18), 4 states have call predecessors, (18), 7 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-19 04:42:45,493 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 246 transitions. [2021-11-19 04:42:45,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 04:42:45,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:45,495 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:42:45,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-19 04:42:45,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:42:45,715 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting l4_insertErr3REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:42:45,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:45,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1358206439, now seen corresponding path program 1 times [2021-11-19 04:42:45,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:42:45,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757995180] [2021-11-19 04:42:45,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:45,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:42:45,752 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:42:45,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752673768] [2021-11-19 04:42:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:45,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:42:45,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:42:45,776 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:42:45,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 04:42:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:42:46,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-19 04:42:46,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:42:46,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-19 04:42:47,101 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 20 treesize of output 19 [2021-11-19 04:42:47,107 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 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-19 04:42:47,529 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-19 04:42:47,530 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 42 treesize of output 42 [2021-11-19 04:42:47,560 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-19 04:42:47,561 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 41 treesize of output 45 [2021-11-19 04:42:47,857 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 14 treesize of output 13 [2021-11-19 04:42:47,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-11-19 04:42:48,042 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-19 04:42:48,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 55 [2021-11-19 04:42:48,083 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-19 04:42:48,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 53 [2021-11-19 04:42:54,511 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 125 proven. 39 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-19 04:42:54,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:42:54,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:42:54,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757995180] [2021-11-19 04:42:54,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:42:54,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752673768] [2021-11-19 04:42:54,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752673768] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:42:54,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:42:54,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-19 04:42:54,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544137294] [2021-11-19 04:42:54,812 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:42:54,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 04:42:54,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:42:54,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 04:42:54,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=439, Unknown=2, NotChecked=0, Total=506 [2021-11-19 04:42:54,814 INFO L87 Difference]: Start difference. First operand 227 states and 246 transitions. Second operand has 21 states, 15 states have (on average 3.6) internal successors, (54), 17 states have internal predecessors, (54), 9 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-19 04:42:56,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:42:56,746 INFO L93 Difference]: Finished difference Result 253 states and 276 transitions. [2021-11-19 04:42:56,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 04:42:56,747 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 3.6) internal successors, (54), 17 states have internal predecessors, (54), 9 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 125 [2021-11-19 04:42:56,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:42:56,751 INFO L225 Difference]: With dead ends: 253 [2021-11-19 04:42:56,751 INFO L226 Difference]: Without dead ends: 253 [2021-11-19 04:42:56,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=113, Invalid=815, Unknown=2, NotChecked=0, Total=930 [2021-11-19 04:42:56,753 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 37 mSDsluCounter, 1622 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1827 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 576 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:42:56,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1827 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 969 Invalid, 0 Unknown, 576 Unchecked, 1.1s Time] [2021-11-19 04:42:56,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-19 04:42:56,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 227. [2021-11-19 04:42:56,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 120 states have (on average 1.6666666666666667) internal successors, (200), 190 states have internal predecessors, (200), 23 states have call successors, (23), 16 states have call predecessors, (23), 14 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-19 04:42:56,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 245 transitions. [2021-11-19 04:42:56,766 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 245 transitions. Word has length 125 [2021-11-19 04:42:56,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:42:56,767 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 245 transitions. [2021-11-19 04:42:56,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 3.6) internal successors, (54), 17 states have internal predecessors, (54), 9 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-19 04:42:56,767 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 245 transitions. [2021-11-19 04:42:56,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 04:42:56,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:56,770 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:42:56,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 04:42:56,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-19 04:42:56,987 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting l4_insertErr5REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:42:56,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:56,987 INFO L85 PathProgramCache]: Analyzing trace with hash 845273625, now seen corresponding path program 1 times [2021-11-19 04:42:56,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:42:56,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841742317] [2021-11-19 04:42:56,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:56,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:42:57,015 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:42:57,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959922094] [2021-11-19 04:42:57,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:57,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:42:57,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:42:57,033 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:42:57,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 04:42:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:42:57,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 04:42:57,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:42:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-19 04:42:57,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:42:57,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-19 04:42:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-19 04:42:58,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:42:58,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841742317] [2021-11-19 04:42:58,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:42:58,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959922094] [2021-11-19 04:42:58,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959922094] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:42:58,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:42:58,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-19 04:42:58,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241626365] [2021-11-19 04:42:58,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:42:58,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:42:58,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:42:58,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:42:58,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:42:58,288 INFO L87 Difference]: Start difference. First operand 227 states and 245 transitions. Second operand has 11 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (16), 1 states have call predecessors, (16), 3 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 04:42:58,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:42:58,557 INFO L93 Difference]: Finished difference Result 226 states and 244 transitions. [2021-11-19 04:42:58,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:42:58,558 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (16), 1 states have call predecessors, (16), 3 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) Word has length 126 [2021-11-19 04:42:58,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:42:58,561 INFO L225 Difference]: With dead ends: 226 [2021-11-19 04:42:58,561 INFO L226 Difference]: Without dead ends: 226 [2021-11-19 04:42:58,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:42:58,563 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 15 mSDsluCounter, 1881 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2104 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:42:58,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 2104 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:42:58,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-19 04:42:58,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2021-11-19 04:42:58,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 120 states have (on average 1.6583333333333334) internal successors, (199), 189 states have internal predecessors, (199), 23 states have call successors, (23), 16 states have call predecessors, (23), 14 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-19 04:42:58,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 244 transitions. [2021-11-19 04:42:58,579 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 244 transitions. Word has length 126 [2021-11-19 04:42:58,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:42:58,582 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 244 transitions. [2021-11-19 04:42:58,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (16), 1 states have call predecessors, (16), 3 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 04:42:58,583 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 244 transitions. [2021-11-19 04:42:58,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 04:42:58,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:58,586 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:42:58,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 04:42:58,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:42:58,811 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting l4_insertErr6REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:42:58,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:58,811 INFO L85 PathProgramCache]: Analyzing trace with hash 559143545, now seen corresponding path program 1 times [2021-11-19 04:42:58,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:42:58,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944948857] [2021-11-19 04:42:58,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:58,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:42:58,843 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:42:58,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452148179] [2021-11-19 04:42:58,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:58,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:42:58,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:42:58,849 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:42:58,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 04:42:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:42:59,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:42:59,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:42:59,381 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-19 04:42:59,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:42:59,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:42:59,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944948857] [2021-11-19 04:42:59,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:42:59,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452148179] [2021-11-19 04:42:59,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452148179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:42:59,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:42:59,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:42:59,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126845241] [2021-11-19 04:42:59,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:42:59,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:42:59,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:42:59,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:42:59,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:42:59,385 INFO L87 Difference]: Start difference. First operand 226 states and 244 transitions. Second operand has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-19 04:42:59,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:42:59,489 INFO L93 Difference]: Finished difference Result 225 states and 243 transitions. [2021-11-19 04:42:59,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:42:59,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 128 [2021-11-19 04:42:59,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:42:59,493 INFO L225 Difference]: With dead ends: 225 [2021-11-19 04:42:59,493 INFO L226 Difference]: Without dead ends: 225 [2021-11-19 04:42:59,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:42:59,494 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 3 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:42:59,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 388 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:42:59,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-19 04:42:59,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2021-11-19 04:42:59,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 120 states have (on average 1.65) internal successors, (198), 188 states have internal predecessors, (198), 23 states have call successors, (23), 16 states have call predecessors, (23), 14 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-19 04:42:59,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 243 transitions. [2021-11-19 04:42:59,510 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 243 transitions. Word has length 128 [2021-11-19 04:42:59,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:42:59,510 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 243 transitions. [2021-11-19 04:42:59,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-19 04:42:59,511 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 243 transitions. [2021-11-19 04:42:59,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 04:42:59,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:59,513 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:42:59,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 04:42:59,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-19 04:42:59,739 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting l4_insertErr7REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:42:59,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:59,739 INFO L85 PathProgramCache]: Analyzing trace with hash 559143546, now seen corresponding path program 1 times [2021-11-19 04:42:59,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:42:59,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271917311] [2021-11-19 04:42:59,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:59,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:42:59,761 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:42:59,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842280470] [2021-11-19 04:42:59,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:59,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:42:59,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:42:59,763 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:42:59,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 04:42:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:42:59,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:42:59,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:43:00,281 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-19 04:43:00,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:43:00,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:43:00,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271917311] [2021-11-19 04:43:00,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:43:00,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842280470] [2021-11-19 04:43:00,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842280470] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:43:00,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:43:00,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:43:00,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957186295] [2021-11-19 04:43:00,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:43:00,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:43:00,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:43:00,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:43:00,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:43:00,284 INFO L87 Difference]: Start difference. First operand 225 states and 243 transitions. Second operand has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-19 04:43:00,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:43:00,405 INFO L93 Difference]: Finished difference Result 224 states and 242 transitions. [2021-11-19 04:43:00,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:43:00,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 128 [2021-11-19 04:43:00,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:43:00,407 INFO L225 Difference]: With dead ends: 224 [2021-11-19 04:43:00,408 INFO L226 Difference]: Without dead ends: 224 [2021-11-19 04:43:00,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:43:00,409 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 2 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:43:00,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 401 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:43:00,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-19 04:43:00,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2021-11-19 04:43:00,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 120 states have (on average 1.6416666666666666) internal successors, (197), 187 states have internal predecessors, (197), 23 states have call successors, (23), 16 states have call predecessors, (23), 14 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-19 04:43:00,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 242 transitions. [2021-11-19 04:43:00,423 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 242 transitions. Word has length 128 [2021-11-19 04:43:00,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:43:00,424 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 242 transitions. [2021-11-19 04:43:00,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-19 04:43:00,425 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 242 transitions. [2021-11-19 04:43:00,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 04:43:00,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:43:00,428 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:43:00,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 04:43:00,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-19 04:43:00,635 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting l3_insertErr0REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:43:00,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:43:00,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1691413546, now seen corresponding path program 1 times [2021-11-19 04:43:00,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:43:00,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834202008] [2021-11-19 04:43:00,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:43:00,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:43:00,648 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:43:00,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87836714] [2021-11-19 04:43:00,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:43:00,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:43:00,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:43:00,651 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:43:00,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 04:43:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:43:00,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-19 04:43:00,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:43:01,111 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-19 04:43:01,250 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-19 04:43:01,251 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 [2021-11-19 04:43:01,362 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 [2021-11-19 04:43:01,490 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 [2021-11-19 04:43:01,674 INFO L354 Elim1Store]: treesize reduction 82, result has 16.3 percent of original size [2021-11-19 04:43:01,674 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 4 case distinctions, treesize of input 24 treesize of output 31 [2021-11-19 04:43:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 141 proven. 41 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-19 04:43:01,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:43:02,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:43:02,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834202008] [2021-11-19 04:43:02,101 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:43:02,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87836714] [2021-11-19 04:43:02,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87836714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:43:02,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:43:02,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-19 04:43:02,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715557144] [2021-11-19 04:43:02,102 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:43:02,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 04:43:02,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:43:02,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 04:43:02,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-11-19 04:43:02,104 INFO L87 Difference]: Start difference. First operand 224 states and 242 transitions. Second operand has 20 states, 15 states have (on average 4.0) internal successors, (60), 16 states have internal predecessors, (60), 8 states have call successors, (18), 4 states have call predecessors, (18), 8 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-19 04:43:02,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:43:02,687 INFO L93 Difference]: Finished difference Result 259 states and 288 transitions. [2021-11-19 04:43:02,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 04:43:02,688 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 4.0) internal successors, (60), 16 states have internal predecessors, (60), 8 states have call successors, (18), 4 states have call predecessors, (18), 8 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 133 [2021-11-19 04:43:02,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:43:02,691 INFO L225 Difference]: With dead ends: 259 [2021-11-19 04:43:02,691 INFO L226 Difference]: Without dead ends: 259 [2021-11-19 04:43:02,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 121 SyntacticMatches, 9 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-11-19 04:43:02,693 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 65 mSDsluCounter, 1846 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 2044 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:43:02,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 2044 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 679 Invalid, 0 Unknown, 323 Unchecked, 0.4s Time] [2021-11-19 04:43:02,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-19 04:43:02,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 233. [2021-11-19 04:43:02,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 125 states have (on average 1.632) internal successors, (204), 193 states have internal predecessors, (204), 27 states have call successors, (27), 17 states have call predecessors, (27), 14 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-19 04:43:02,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 257 transitions. [2021-11-19 04:43:02,706 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 257 transitions. Word has length 133 [2021-11-19 04:43:02,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:43:02,707 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 257 transitions. [2021-11-19 04:43:02,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 4.0) internal successors, (60), 16 states have internal predecessors, (60), 8 states have call successors, (18), 4 states have call predecessors, (18), 8 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-19 04:43:02,708 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 257 transitions. [2021-11-19 04:43:02,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 04:43:02,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:43:02,710 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:43:02,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 04:43:02,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:43:02,935 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting l3_insertErr1REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:43:02,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:43:02,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1691413545, now seen corresponding path program 1 times [2021-11-19 04:43:02,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:43:02,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967208449] [2021-11-19 04:43:02,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:43:02,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:43:02,953 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:43:02,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568037706] [2021-11-19 04:43:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:43:02,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:43:02,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:43:02,955 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:43:02,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 04:43:03,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:43:03,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 127 conjunts are in the unsatisfiable core [2021-11-19 04:43:03,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:43:03,335 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 8 treesize of output 7 [2021-11-19 04:43:04,270 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 20 treesize of output 19 [2021-11-19 04:43:04,274 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 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-19 04:43:04,811 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-19 04:43:04,812 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 26 treesize of output 30 [2021-11-19 04:43:05,013 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-19 04:43:05,014 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 [2021-11-19 04:43:05,462 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 20 treesize of output 19 [2021-11-19 04:43:05,466 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 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-19 04:43:06,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-11-19 04:43:06,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-11-19 04:43:06,811 INFO L354 Elim1Store]: treesize reduction 50, result has 20.6 percent of original size [2021-11-19 04:43:06,812 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 2 case distinctions, treesize of input 58 treesize of output 60 [2021-11-19 04:43:06,972 INFO L354 Elim1Store]: treesize reduction 32, result has 34.7 percent of original size [2021-11-19 04:43:06,974 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 60 treesize of output 68 [2021-11-19 04:43:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 64 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 04:43:15,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:43:15,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:43:15,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967208449] [2021-11-19 04:43:15,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:43:15,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568037706] [2021-11-19 04:43:15,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568037706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:43:15,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:43:15,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-19 04:43:15,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078957246] [2021-11-19 04:43:15,924 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:43:15,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-19 04:43:15,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:43:15,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-19 04:43:15,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=770, Unknown=3, NotChecked=0, Total=870 [2021-11-19 04:43:15,926 INFO L87 Difference]: Start difference. First operand 233 states and 257 transitions. Second operand has 28 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 10 states have call successors, (20), 4 states have call predecessors, (20), 9 states have return successors, (18), 11 states have call predecessors, (18), 9 states have call successors, (18) [2021-11-19 04:43:18,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:43:18,233 INFO L93 Difference]: Finished difference Result 295 states and 349 transitions. [2021-11-19 04:43:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 04:43:18,234 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 10 states have call successors, (20), 4 states have call predecessors, (20), 9 states have return successors, (18), 11 states have call predecessors, (18), 9 states have call successors, (18) Word has length 133 [2021-11-19 04:43:18,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:43:18,238 INFO L225 Difference]: With dead ends: 295 [2021-11-19 04:43:18,238 INFO L226 Difference]: Without dead ends: 295 [2021-11-19 04:43:18,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 103 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=152, Invalid=1251, Unknown=3, NotChecked=0, Total=1406 [2021-11-19 04:43:18,241 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 42 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1393 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1079 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:43:18,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 1393 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 287 Invalid, 0 Unknown, 1079 Unchecked, 0.3s Time] [2021-11-19 04:43:18,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-19 04:43:18,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 267. [2021-11-19 04:43:18,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 150 states have (on average 1.5533333333333332) internal successors, (233), 217 states have internal predecessors, (233), 32 states have call successors, (32), 18 states have call predecessors, (32), 18 states have return successors, (50), 32 states have call predecessors, (50), 31 states have call successors, (50) [2021-11-19 04:43:18,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 315 transitions. [2021-11-19 04:43:18,258 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 315 transitions. Word has length 133 [2021-11-19 04:43:18,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:43:18,258 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 315 transitions. [2021-11-19 04:43:18,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 10 states have call successors, (20), 4 states have call predecessors, (20), 9 states have return successors, (18), 11 states have call predecessors, (18), 9 states have call successors, (18) [2021-11-19 04:43:18,259 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 315 transitions. [2021-11-19 04:43:18,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-19 04:43:18,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:43:18,262 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:43:18,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-19 04:43:18,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:43:18,484 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting l3_insertErr1REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:43:18,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:43:18,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1653646561, now seen corresponding path program 1 times [2021-11-19 04:43:18,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:43:18,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605916560] [2021-11-19 04:43:18,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:43:18,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:43:18,514 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:43:18,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437411993] [2021-11-19 04:43:18,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:43:18,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:43:18,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:43:18,516 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:43:18,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 04:43:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:43:19,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-19 04:43:19,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:43:19,183 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 [2021-11-19 04:43:20,032 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 20 treesize of output 19 [2021-11-19 04:43:20,036 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 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-19 04:43:20,516 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-19 04:43:20,516 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 30 treesize of output 32 [2021-11-19 04:43:20,538 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-19 04:43:20,538 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 29 treesize of output 33 [2021-11-19 04:43:20,718 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 20 treesize of output 19 [2021-11-19 04:43:20,721 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 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-19 04:43:21,171 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 14 treesize of output 13 [2021-11-19 04:43:21,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-11-19 04:43:21,704 INFO L354 Elim1Store]: treesize reduction 92, result has 16.4 percent of original size [2021-11-19 04:43:21,705 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 4 case distinctions, treesize of input 53 treesize of output 60 [2021-11-19 04:43:21,760 INFO L354 Elim1Store]: treesize reduction 32, result has 34.7 percent of original size [2021-11-19 04:43:21,760 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 55 treesize of output 63 [2021-11-19 04:43:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 132 proven. 66 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-19 04:43:28,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:43:28,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:43:28,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605916560] [2021-11-19 04:43:28,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:43:28,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437411993] [2021-11-19 04:43:28,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437411993] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:43:28,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:43:28,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-19 04:43:28,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711658173] [2021-11-19 04:43:28,951 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:43:28,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 04:43:28,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:43:28,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 04:43:28,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=526, Unknown=2, NotChecked=0, Total=600 [2021-11-19 04:43:28,953 INFO L87 Difference]: Start difference. First operand 267 states and 315 transitions. Second operand has 23 states, 16 states have (on average 3.75) internal successors, (60), 18 states have internal predecessors, (60), 10 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2021-11-19 04:43:31,028 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-19 04:43:35,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:43:35,170 INFO L93 Difference]: Finished difference Result 319 states and 379 transitions. [2021-11-19 04:43:35,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 04:43:35,170 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 16 states have (on average 3.75) internal successors, (60), 18 states have internal predecessors, (60), 10 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) Word has length 138 [2021-11-19 04:43:35,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:43:35,174 INFO L225 Difference]: With dead ends: 319 [2021-11-19 04:43:35,174 INFO L226 Difference]: Without dead ends: 319 [2021-11-19 04:43:35,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 111 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=136, Invalid=1050, Unknown=4, NotChecked=0, Total=1190 [2021-11-19 04:43:35,176 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 46 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 695 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:43:35,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 1549 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 761 Invalid, 1 Unknown, 695 Unchecked, 2.9s Time] [2021-11-19 04:43:35,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-19 04:43:35,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 248. [2021-11-19 04:43:35,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 137 states have (on average 1.583941605839416) internal successors, (217), 204 states have internal predecessors, (217), 29 states have call successors, (29), 18 states have call predecessors, (29), 15 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-19 04:43:35,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 274 transitions. [2021-11-19 04:43:35,190 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 274 transitions. Word has length 138 [2021-11-19 04:43:35,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:43:35,190 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 274 transitions. [2021-11-19 04:43:35,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 16 states have (on average 3.75) internal successors, (60), 18 states have internal predecessors, (60), 10 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2021-11-19 04:43:35,191 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 274 transitions. [2021-11-19 04:43:35,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 04:43:35,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:43:35,193 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:43:35,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 04:43:35,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-19 04:43:35,419 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting l3_insertErr2REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:43:35,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:43:35,419 INFO L85 PathProgramCache]: Analyzing trace with hash -894212344, now seen corresponding path program 1 times [2021-11-19 04:43:35,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:43:35,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840812119] [2021-11-19 04:43:35,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:43:35,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:43:35,461 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:43:35,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518672157] [2021-11-19 04:43:35,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:43:35,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:43:35,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:43:35,463 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:43:35,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 04:43:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:43:35,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 04:43:35,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:43:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-19 04:43:35,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:43:35,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:43:35,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840812119] [2021-11-19 04:43:35,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:43:35,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518672157] [2021-11-19 04:43:35,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518672157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:43:35,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:43:35,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:43:35,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361372832] [2021-11-19 04:43:35,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:43:35,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:43:35,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:43:35,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:43:35,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:43:35,961 INFO L87 Difference]: Start difference. First operand 248 states and 274 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 04:43:36,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:43:36,125 INFO L93 Difference]: Finished difference Result 247 states and 273 transitions. [2021-11-19 04:43:36,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:43:36,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 134 [2021-11-19 04:43:36,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:43:36,127 INFO L225 Difference]: With dead ends: 247 [2021-11-19 04:43:36,128 INFO L226 Difference]: Without dead ends: 247 [2021-11-19 04:43:36,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:43:36,132 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 18 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:43:36,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 738 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:43:36,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-19 04:43:36,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2021-11-19 04:43:36,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 137 states have (on average 1.5766423357664234) internal successors, (216), 203 states have internal predecessors, (216), 29 states have call successors, (29), 18 states have call predecessors, (29), 15 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-19 04:43:36,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 273 transitions. [2021-11-19 04:43:36,145 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 273 transitions. Word has length 134 [2021-11-19 04:43:36,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:43:36,145 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 273 transitions. [2021-11-19 04:43:36,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 04:43:36,146 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 273 transitions. [2021-11-19 04:43:36,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 04:43:36,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:43:36,147 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:43:36,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-19 04:43:36,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:43:36,371 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting l3_insertErr3REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:43:36,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:43:36,371 INFO L85 PathProgramCache]: Analyzing trace with hash -894212343, now seen corresponding path program 1 times [2021-11-19 04:43:36,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:43:36,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853859677] [2021-11-19 04:43:36,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:43:36,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:43:36,381 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:43:36,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592224219] [2021-11-19 04:43:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:43:36,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:43:36,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:43:36,383 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:43:36,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 04:43:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:43:36,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-19 04:43:36,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:43:36,731 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 8 treesize of output 7 [2021-11-19 04:43:37,864 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 20 treesize of output 19 [2021-11-19 04:43:37,866 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 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-19 04:43:38,402 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 14 treesize of output 13 [2021-11-19 04:43:38,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-11-19 04:43:39,124 INFO L354 Elim1Store]: treesize reduction 50, result has 20.6 percent of original size [2021-11-19 04:43:39,124 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 2 case distinctions, treesize of input 54 treesize of output 56 [2021-11-19 04:43:39,196 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-19 04:43:39,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 58 [2021-11-19 04:43:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 124 proven. 36 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-19 04:43:42,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:43:43,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:43:43,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853859677] [2021-11-19 04:43:43,117 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:43:43,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592224219] [2021-11-19 04:43:43,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592224219] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:43:43,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:43:43,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-19 04:43:43,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26135729] [2021-11-19 04:43:43,117 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:43:43,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 04:43:43,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:43:43,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 04:43:43,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-11-19 04:43:43,119 INFO L87 Difference]: Start difference. First operand 247 states and 273 transitions. Second operand has 24 states, 18 states have (on average 3.388888888888889) internal successors, (61), 20 states have internal predecessors, (61), 8 states have call successors, (19), 3 states have call predecessors, (19), 8 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-19 04:43:45,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:43:45,135 INFO L93 Difference]: Finished difference Result 304 states and 353 transitions. [2021-11-19 04:43:45,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 04:43:45,135 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 3.388888888888889) internal successors, (61), 20 states have internal predecessors, (61), 8 states have call successors, (19), 3 states have call predecessors, (19), 8 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) Word has length 134 [2021-11-19 04:43:45,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:43:45,137 INFO L225 Difference]: With dead ends: 304 [2021-11-19 04:43:45,137 INFO L226 Difference]: Without dead ends: 304 [2021-11-19 04:43:45,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 112 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 04:43:45,139 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 54 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1413 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:43:45,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 1639 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 493 Invalid, 0 Unknown, 1413 Unchecked, 0.4s Time] [2021-11-19 04:43:45,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-19 04:43:45,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 268. [2021-11-19 04:43:45,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 153 states have (on average 1.5490196078431373) internal successors, (237), 218 states have internal predecessors, (237), 31 states have call successors, (31), 18 states have call predecessors, (31), 18 states have return successors, (43), 32 states have call predecessors, (43), 30 states have call successors, (43) [2021-11-19 04:43:45,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 311 transitions. [2021-11-19 04:43:45,151 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 311 transitions. Word has length 134 [2021-11-19 04:43:45,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:43:45,151 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 311 transitions. [2021-11-19 04:43:45,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 3.388888888888889) internal successors, (61), 20 states have internal predecessors, (61), 8 states have call successors, (19), 3 states have call predecessors, (19), 8 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-19 04:43:45,152 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 311 transitions. [2021-11-19 04:43:45,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-19 04:43:45,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:43:45,153 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:43:45,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-19 04:43:45,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-19 04:43:45,367 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting l3_insertErr3REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:43:45,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:43:45,367 INFO L85 PathProgramCache]: Analyzing trace with hash 2137605947, now seen corresponding path program 1 times [2021-11-19 04:43:45,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:43:45,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193093341] [2021-11-19 04:43:45,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:43:45,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:43:45,378 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:43:45,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582873875] [2021-11-19 04:43:45,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:43:45,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:43:45,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:43:45,381 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:43:45,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-19 04:43:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:43:45,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-19 04:43:45,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:43:45,830 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 8 treesize of output 7 [2021-11-19 04:43:51,506 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 20 treesize of output 19 [2021-11-19 04:43:51,509 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 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-19 04:43:54,209 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 14 treesize of output 13 [2021-11-19 04:43:54,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-11-19 04:43:55,362 INFO L354 Elim1Store]: treesize reduction 50, result has 20.6 percent of original size [2021-11-19 04:43:55,362 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 2 case distinctions, treesize of input 61 treesize of output 61 [2021-11-19 04:43:55,596 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-19 04:43:55,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 65 [2021-11-19 04:44:03,401 WARN L227 SmtUtils]: Spent 6.32s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:44:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 125 proven. 45 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-19 04:44:03,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:44:05,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:05,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193093341] [2021-11-19 04:44:05,139 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:44:05,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582873875] [2021-11-19 04:44:05,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582873875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:44:05,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:44:05,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-11-19 04:44:05,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568950226] [2021-11-19 04:44:05,140 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:44:05,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-19 04:44:05,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:05,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-19 04:44:05,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-11-19 04:44:05,141 INFO L87 Difference]: Start difference. First operand 268 states and 311 transitions. Second operand has 29 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 8 states have call successors, (19), 3 states have call predecessors, (19), 9 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-19 04:44:19,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:19,001 INFO L93 Difference]: Finished difference Result 343 states and 420 transitions. [2021-11-19 04:44:19,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-19 04:44:19,001 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 8 states have call successors, (19), 3 states have call predecessors, (19), 9 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) Word has length 135 [2021-11-19 04:44:19,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:19,004 INFO L225 Difference]: With dead ends: 343 [2021-11-19 04:44:19,004 INFO L226 Difference]: Without dead ends: 343 [2021-11-19 04:44:19,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=149, Invalid=1411, Unknown=0, NotChecked=0, Total=1560 [2021-11-19 04:44:19,006 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 47 mSDsluCounter, 1753 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 1954 SdHoareTripleChecker+Invalid, 2010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1276 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:19,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 1954 Invalid, 2010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 709 Invalid, 0 Unknown, 1276 Unchecked, 0.6s Time] [2021-11-19 04:44:19,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-19 04:44:19,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 306. [2021-11-19 04:44:19,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 180 states have (on average 1.4722222222222223) internal successors, (265), 246 states have internal predecessors, (265), 37 states have call successors, (37), 20 states have call predecessors, (37), 23 states have return successors, (72), 40 states have call predecessors, (72), 36 states have call successors, (72) [2021-11-19 04:44:19,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 374 transitions. [2021-11-19 04:44:19,020 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 374 transitions. Word has length 135 [2021-11-19 04:44:19,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:19,021 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 374 transitions. [2021-11-19 04:44:19,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 8 states have call successors, (19), 3 states have call predecessors, (19), 9 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-19 04:44:19,021 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 374 transitions. [2021-11-19 04:44:19,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 04:44:19,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:19,023 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:19,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-19 04:44:19,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-19 04:44:19,247 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting l3_insertErr3REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:44:19,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:19,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1634692425, now seen corresponding path program 2 times [2021-11-19 04:44:19,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:19,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676223455] [2021-11-19 04:44:19,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:19,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:19,256 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:44:19,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148885861] [2021-11-19 04:44:19,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:44:19,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:44:19,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:44:19,258 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:44:19,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-19 04:44:19,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:44:19,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:44:19,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-19 04:44:19,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:44:19,700 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 8 treesize of output 7 [2021-11-19 04:44:25,495 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 20 treesize of output 19 [2021-11-19 04:44:25,497 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 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-19 04:44:27,842 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 20 treesize of output 19 [2021-11-19 04:44:27,845 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 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-19 04:44:29,911 INFO L354 Elim1Store]: treesize reduction 50, result has 20.6 percent of original size [2021-11-19 04:44:29,912 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 2 case distinctions, treesize of input 61 treesize of output 61 [2021-11-19 04:44:30,235 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-19 04:44:30,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 65 [2021-11-19 04:44:35,075 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 150 proven. 36 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-19 04:44:35,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:44:36,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:36,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676223455] [2021-11-19 04:44:36,386 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:44:36,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148885861] [2021-11-19 04:44:36,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148885861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:44:36,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:44:36,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-11-19 04:44:36,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897179551] [2021-11-19 04:44:36,387 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:44:36,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-19 04:44:36,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:36,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-19 04:44:36,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-11-19 04:44:36,389 INFO L87 Difference]: Start difference. First operand 306 states and 374 transitions. Second operand has 29 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 7 states have call successors, (18), 3 states have call predecessors, (18), 10 states have return successors, (16), 10 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-19 04:44:48,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:48,148 INFO L93 Difference]: Finished difference Result 364 states and 462 transitions. [2021-11-19 04:44:48,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 04:44:48,149 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 7 states have call successors, (18), 3 states have call predecessors, (18), 10 states have return successors, (16), 10 states have call predecessors, (16), 7 states have call successors, (16) Word has length 136 [2021-11-19 04:44:48,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:48,152 INFO L225 Difference]: With dead ends: 364 [2021-11-19 04:44:48,152 INFO L226 Difference]: Without dead ends: 364 [2021-11-19 04:44:48,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2021-11-19 04:44:48,154 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 58 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 934 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:48,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 1051 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 409 Invalid, 0 Unknown, 934 Unchecked, 0.4s Time] [2021-11-19 04:44:48,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-11-19 04:44:48,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 316. [2021-11-19 04:44:48,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 187 states have (on average 1.4598930481283423) internal successors, (273), 254 states have internal predecessors, (273), 37 states have call successors, (37), 20 states have call predecessors, (37), 26 states have return successors, (89), 42 states have call predecessors, (89), 36 states have call successors, (89) [2021-11-19 04:44:48,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 399 transitions. [2021-11-19 04:44:48,169 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 399 transitions. Word has length 136 [2021-11-19 04:44:48,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:48,170 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 399 transitions. [2021-11-19 04:44:48,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 7 states have call successors, (18), 3 states have call predecessors, (18), 10 states have return successors, (16), 10 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-19 04:44:48,170 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 399 transitions. [2021-11-19 04:44:48,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-19 04:44:48,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:48,172 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:48,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-19 04:44:48,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-19 04:44:48,393 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting l3_insertErr3REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:44:48,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:48,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1288743041, now seen corresponding path program 3 times [2021-11-19 04:44:48,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:48,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508093928] [2021-11-19 04:44:48,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:48,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:48,403 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:44:48,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637589158] [2021-11-19 04:44:48,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:44:48,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:44:48,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:44:48,405 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:44:48,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-19 04:44:48,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 04:44:48,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:44:48,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 04:44:48,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:44:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 77 proven. 1 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-19 04:44:49,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:44:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 77 proven. 1 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-19 04:44:51,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:44:51,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508093928] [2021-11-19 04:44:51,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:44:51,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637589158] [2021-11-19 04:44:51,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637589158] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:44:51,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:44:51,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-19 04:44:51,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238810376] [2021-11-19 04:44:51,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:44:51,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 04:44:51,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:44:51,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 04:44:51,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:44:51,772 INFO L87 Difference]: Start difference. First operand 316 states and 399 transitions. Second operand has 15 states, 11 states have (on average 5.090909090909091) internal successors, (56), 15 states have internal predecessors, (56), 5 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-19 04:44:52,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:52,619 INFO L93 Difference]: Finished difference Result 298 states and 343 transitions. [2021-11-19 04:44:52,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:44:52,620 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 5.090909090909091) internal successors, (56), 15 states have internal predecessors, (56), 5 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 141 [2021-11-19 04:44:52,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:52,622 INFO L225 Difference]: With dead ends: 298 [2021-11-19 04:44:52,622 INFO L226 Difference]: Without dead ends: 280 [2021-11-19 04:44:52,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-11-19 04:44:52,623 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 25 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:52,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1947 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:44:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-19 04:44:52,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2021-11-19 04:44:52,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 159 states have (on average 1.528301886792453) internal successors, (243), 224 states have internal predecessors, (243), 32 states have call successors, (32), 19 states have call predecessors, (32), 19 states have return successors, (42), 33 states have call predecessors, (42), 31 states have call successors, (42) [2021-11-19 04:44:52,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 317 transitions. [2021-11-19 04:44:52,637 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 317 transitions. Word has length 141 [2021-11-19 04:44:52,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:52,638 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 317 transitions. [2021-11-19 04:44:52,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 5.090909090909091) internal successors, (56), 15 states have internal predecessors, (56), 5 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-19 04:44:52,638 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 317 transitions. [2021-11-19 04:44:52,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-19 04:44:52,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:52,639 INFO L514 BasicCegarLoop]: trace histogram [16, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:52,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-19 04:44:52,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:44:52,857 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting l3_insertErr3REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:44:52,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:52,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1326087305, now seen corresponding path program 4 times [2021-11-19 04:44:52,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:44:52,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247264037] [2021-11-19 04:44:52,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:44:52,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:44:52,868 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:44:52,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [50079545] [2021-11-19 04:44:52,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:44:52,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:44:52,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:44:52,869 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:44:52,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-19 04:44:54,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:44:54,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:44:54,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 94 conjunts are in the unsatisfiable core [2021-11-19 04:44:54,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:44:54,125 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 [2021-11-19 04:44:54,130 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 8 treesize of output 7 [2021-11-19 04:44:55,603 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 20 treesize of output 19 [2021-11-19 04:44:55,607 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 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-19 04:44:56,334 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 14 treesize of output 13 [2021-11-19 04:44:56,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-11-19 04:44:57,271 INFO L354 Elim1Store]: treesize reduction 50, result has 20.6 percent of original size [2021-11-19 04:44:57,271 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 2 case distinctions, treesize of input 54 treesize of output 56 [2021-11-19 04:44:57,430 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-19 04:44:57,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 58 [2021-11-19 04:45:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 208 proven. 81 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-11-19 04:45:01,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:45:01,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:45:01,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247264037] [2021-11-19 04:45:01,927 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:45:01,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50079545] [2021-11-19 04:45:01,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50079545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:45:01,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:45:01,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-19 04:45:01,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801551663] [2021-11-19 04:45:01,927 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:45:01,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-19 04:45:01,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:45:01,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-19 04:45:01,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 04:45:01,929 INFO L87 Difference]: Start difference. First operand 276 states and 317 transitions. Second operand has 31 states, 25 states have (on average 2.64) internal successors, (66), 26 states have internal predecessors, (66), 8 states have call successors, (19), 3 states have call predecessors, (19), 9 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-19 04:45:03,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:03,588 INFO L93 Difference]: Finished difference Result 330 states and 394 transitions. [2021-11-19 04:45:03,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 04:45:03,589 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 2.64) internal successors, (66), 26 states have internal predecessors, (66), 8 states have call successors, (19), 3 states have call predecessors, (19), 9 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) Word has length 150 [2021-11-19 04:45:03,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:03,592 INFO L225 Difference]: With dead ends: 330 [2021-11-19 04:45:03,592 INFO L226 Difference]: Without dead ends: 330 [2021-11-19 04:45:03,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 121 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=191, Invalid=1879, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 04:45:03,594 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 51 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 881 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:03,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 740 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 253 Invalid, 0 Unknown, 881 Unchecked, 0.3s Time] [2021-11-19 04:45:03,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-19 04:45:03,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 277. [2021-11-19 04:45:03,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 160 states have (on average 1.53125) internal successors, (245), 225 states have internal predecessors, (245), 32 states have call successors, (32), 19 states have call predecessors, (32), 19 states have return successors, (42), 33 states have call predecessors, (42), 31 states have call successors, (42) [2021-11-19 04:45:03,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 319 transitions. [2021-11-19 04:45:03,606 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 319 transitions. Word has length 150 [2021-11-19 04:45:03,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:03,606 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 319 transitions. [2021-11-19 04:45:03,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 2.64) internal successors, (66), 26 states have internal predecessors, (66), 8 states have call successors, (19), 3 states have call predecessors, (19), 9 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-19 04:45:03,607 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 319 transitions. [2021-11-19 04:45:03,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-19 04:45:03,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:03,621 INFO L514 BasicCegarLoop]: trace histogram [14, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:03,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-19 04:45:03,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:45:03,831 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting l3_insertErr3REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:45:03,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:03,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1064106935, now seen corresponding path program 5 times [2021-11-19 04:45:03,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:45:03,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543697572] [2021-11-19 04:45:03,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:03,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:45:03,840 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:45:03,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1594425935] [2021-11-19 04:45:03,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:45:03,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:45:03,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:45:03,849 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:45:03,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-19 04:45:04,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 04:45:04,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:45:04,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-19 04:45:04,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 218 proven. 10 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-19 04:45:05,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:45:07,452 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 20 proven. 89 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-11-19 04:45:07,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:45:07,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543697572] [2021-11-19 04:45:07,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:45:07,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594425935] [2021-11-19 04:45:07,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594425935] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:45:07,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:45:07,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-11-19 04:45:07,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529409710] [2021-11-19 04:45:07,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:45:07,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 04:45:07,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:45:07,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 04:45:07,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:45:07,455 INFO L87 Difference]: Start difference. First operand 277 states and 319 transitions. Second operand has 17 states, 13 states have (on average 6.153846153846154) internal successors, (80), 17 states have internal predecessors, (80), 6 states have call successors, (26), 2 states have call predecessors, (26), 7 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-19 04:45:07,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:07,887 INFO L93 Difference]: Finished difference Result 290 states and 331 transitions. [2021-11-19 04:45:07,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:45:07,887 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 6.153846153846154) internal successors, (80), 17 states have internal predecessors, (80), 6 states have call successors, (26), 2 states have call predecessors, (26), 7 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 148 [2021-11-19 04:45:07,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:07,889 INFO L225 Difference]: With dead ends: 290 [2021-11-19 04:45:07,889 INFO L226 Difference]: Without dead ends: 277 [2021-11-19 04:45:07,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 279 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-11-19 04:45:07,890 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 19 mSDsluCounter, 2388 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2609 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:07,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 2609 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:45:07,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-19 04:45:07,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2021-11-19 04:45:07,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 160 states have (on average 1.525) internal successors, (244), 225 states have internal predecessors, (244), 32 states have call successors, (32), 19 states have call predecessors, (32), 19 states have return successors, (42), 33 states have call predecessors, (42), 31 states have call successors, (42) [2021-11-19 04:45:07,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 318 transitions. [2021-11-19 04:45:07,909 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 318 transitions. Word has length 148 [2021-11-19 04:45:07,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:07,910 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 318 transitions. [2021-11-19 04:45:07,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 6.153846153846154) internal successors, (80), 17 states have internal predecessors, (80), 6 states have call successors, (26), 2 states have call predecessors, (26), 7 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-19 04:45:07,910 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 318 transitions. [2021-11-19 04:45:07,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-19 04:45:07,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:07,911 INFO L514 BasicCegarLoop]: trace histogram [23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:07,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-19 04:45:08,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:45:08,127 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting l3_insertErr3REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:45:08,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:08,127 INFO L85 PathProgramCache]: Analyzing trace with hash 50702687, now seen corresponding path program 6 times [2021-11-19 04:45:08,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:45:08,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888758687] [2021-11-19 04:45:08,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:08,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:45:08,138 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:45:08,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134749757] [2021-11-19 04:45:08,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:45:08,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:45:08,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:45:08,140 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:45:08,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-19 04:45:09,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-19 04:45:09,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:45:09,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-19 04:45:09,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:10,321 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 200 proven. 17 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-11-19 04:45:10,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:45:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 175 proven. 10 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2021-11-19 04:45:13,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:45:13,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888758687] [2021-11-19 04:45:13,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:45:13,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134749757] [2021-11-19 04:45:13,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134749757] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:45:13,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:45:13,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 29 [2021-11-19 04:45:13,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244036010] [2021-11-19 04:45:13,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:45:13,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-19 04:45:13,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:45:13,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-19 04:45:13,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-11-19 04:45:13,149 INFO L87 Difference]: Start difference. First operand 277 states and 318 transitions. Second operand has 29 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 27 states have internal predecessors, (73), 7 states have call successors, (21), 1 states have call predecessors, (21), 9 states have return successors, (18), 10 states have call predecessors, (18), 7 states have call successors, (18) [2021-11-19 04:45:14,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:14,903 INFO L93 Difference]: Finished difference Result 280 states and 307 transitions. [2021-11-19 04:45:14,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-19 04:45:14,906 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 27 states have internal predecessors, (73), 7 states have call successors, (21), 1 states have call predecessors, (21), 9 states have return successors, (18), 10 states have call predecessors, (18), 7 states have call successors, (18) Word has length 157 [2021-11-19 04:45:14,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:14,907 INFO L225 Difference]: With dead ends: 280 [2021-11-19 04:45:14,907 INFO L226 Difference]: Without dead ends: 258 [2021-11-19 04:45:14,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 04:45:14,909 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 45 mSDsluCounter, 3999 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 4212 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:14,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 4212 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 04:45:14,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-19 04:45:14,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2021-11-19 04:45:14,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 146 states have (on average 1.5410958904109588) internal successors, (225), 212 states have internal predecessors, (225), 30 states have call successors, (30), 19 states have call predecessors, (30), 16 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2021-11-19 04:45:14,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 284 transitions. [2021-11-19 04:45:14,918 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 284 transitions. Word has length 157 [2021-11-19 04:45:14,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:14,918 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 284 transitions. [2021-11-19 04:45:14,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 27 states have internal predecessors, (73), 7 states have call successors, (21), 1 states have call predecessors, (21), 9 states have return successors, (18), 10 states have call predecessors, (18), 7 states have call successors, (18) [2021-11-19 04:45:14,919 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 284 transitions. [2021-11-19 04:45:14,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-19 04:45:14,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:14,920 INFO L514 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:14,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-19 04:45:15,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:45:15,127 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting l3_insertErr3REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:45:15,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:15,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1463956841, now seen corresponding path program 7 times [2021-11-19 04:45:15,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:45:15,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199947127] [2021-11-19 04:45:15,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:15,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:45:15,140 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:45:15,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54951786] [2021-11-19 04:45:15,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:45:15,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:45:15,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:45:15,141 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:45:15,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-19 04:45:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:45:16,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-19 04:45:16,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:16,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-19 04:45:17,313 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 20 treesize of output 19 [2021-11-19 04:45:17,317 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 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-19 04:45:17,893 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 14 treesize of output 13 [2021-11-19 04:45:17,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-11-19 04:45:18,375 INFO L354 Elim1Store]: treesize reduction 50, result has 20.6 percent of original size [2021-11-19 04:45:18,376 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 2 case distinctions, treesize of input 37 treesize of output 41 [2021-11-19 04:45:18,394 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-19 04:45:18,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2021-11-19 04:45:22,687 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 335 proven. 105 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2021-11-19 04:45:22,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:45:23,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:45:23,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199947127] [2021-11-19 04:45:23,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:45:23,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54951786] [2021-11-19 04:45:23,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54951786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:45:23,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:45:23,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-19 04:45:23,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804788134] [2021-11-19 04:45:23,080 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:45:23,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 04:45:23,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:45:23,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 04:45:23,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=401, Unknown=1, NotChecked=0, Total=462 [2021-11-19 04:45:23,081 INFO L87 Difference]: Start difference. First operand 258 states and 284 transitions. Second operand has 20 states, 14 states have (on average 4.357142857142857) internal successors, (61), 16 states have internal predecessors, (61), 8 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-19 04:45:25,171 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-19 04:45:27,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:27,029 INFO L93 Difference]: Finished difference Result 306 states and 341 transitions. [2021-11-19 04:45:27,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 04:45:27,029 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 4.357142857142857) internal successors, (61), 16 states have internal predecessors, (61), 8 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 164 [2021-11-19 04:45:27,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:27,032 INFO L225 Difference]: With dead ends: 306 [2021-11-19 04:45:27,032 INFO L226 Difference]: Without dead ends: 306 [2021-11-19 04:45:27,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 144 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=110, Invalid=759, Unknown=1, NotChecked=0, Total=870 [2021-11-19 04:45:27,033 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 45 mSDsluCounter, 1468 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 611 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:27,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 1666 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1038 Invalid, 1 Unknown, 611 Unchecked, 3.4s Time] [2021-11-19 04:45:27,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-19 04:45:27,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 276. [2021-11-19 04:45:27,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 159 states have (on average 1.528301886792453) internal successors, (243), 226 states have internal predecessors, (243), 34 states have call successors, (34), 20 states have call predecessors, (34), 17 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-19 04:45:27,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 310 transitions. [2021-11-19 04:45:27,043 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 310 transitions. Word has length 164 [2021-11-19 04:45:27,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:27,043 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 310 transitions. [2021-11-19 04:45:27,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 4.357142857142857) internal successors, (61), 16 states have internal predecessors, (61), 8 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-19 04:45:27,044 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 310 transitions. [2021-11-19 04:45:27,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-19 04:45:27,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:27,045 INFO L514 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:27,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-19 04:45:27,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-19 04:45:27,259 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting l3_insertErr4REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:45:27,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:27,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1886748791, now seen corresponding path program 1 times [2021-11-19 04:45:27,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:45:27,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602991636] [2021-11-19 04:45:27,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:27,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:45:27,275 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:45:27,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1473861396] [2021-11-19 04:45:27,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:27,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:45:27,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:45:27,277 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:45:27,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-19 04:45:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:45:27,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:45:27,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:27,886 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2021-11-19 04:45:27,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:45:27,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:45:27,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602991636] [2021-11-19 04:45:27,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:45:27,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473861396] [2021-11-19 04:45:27,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473861396] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:45:27,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:45:27,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:45:27,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68268478] [2021-11-19 04:45:27,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:45:27,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:45:27,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:45:27,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:45:27,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:45:27,892 INFO L87 Difference]: Start difference. First operand 276 states and 310 transitions. Second operand has 3 states, 2 states have (on average 18.5) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-19 04:45:27,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:27,994 INFO L93 Difference]: Finished difference Result 275 states and 309 transitions. [2021-11-19 04:45:27,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:45:27,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 18.5) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 166 [2021-11-19 04:45:27,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:27,997 INFO L225 Difference]: With dead ends: 275 [2021-11-19 04:45:27,997 INFO L226 Difference]: Without dead ends: 275 [2021-11-19 04:45:27,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:45:27,998 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 4 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:27,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 383 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:45:27,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-19 04:45:28,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2021-11-19 04:45:28,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 159 states have (on average 1.5220125786163523) internal successors, (242), 225 states have internal predecessors, (242), 34 states have call successors, (34), 20 states have call predecessors, (34), 17 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-19 04:45:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 309 transitions. [2021-11-19 04:45:28,010 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 309 transitions. Word has length 166 [2021-11-19 04:45:28,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:28,011 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 309 transitions. [2021-11-19 04:45:28,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 18.5) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-19 04:45:28,011 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 309 transitions. [2021-11-19 04:45:28,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-19 04:45:28,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:28,013 INFO L514 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:28,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-19 04:45:28,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-19 04:45:28,227 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting l3_insertErr5REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:45:28,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:28,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1886748790, now seen corresponding path program 1 times [2021-11-19 04:45:28,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:45:28,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534974235] [2021-11-19 04:45:28,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:28,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:45:28,238 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:45:28,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677767095] [2021-11-19 04:45:28,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:28,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:45:28,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:45:28,267 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:45:28,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-19 04:45:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:45:28,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:45:28,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2021-11-19 04:45:28,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:45:28,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:45:28,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534974235] [2021-11-19 04:45:28,814 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:45:28,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677767095] [2021-11-19 04:45:28,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677767095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:45:28,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:45:28,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:45:28,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931038192] [2021-11-19 04:45:28,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:45:28,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:45:28,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:45:28,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:45:28,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:45:28,816 INFO L87 Difference]: Start difference. First operand 275 states and 309 transitions. Second operand has 3 states, 2 states have (on average 18.5) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-19 04:45:28,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:28,970 INFO L93 Difference]: Finished difference Result 274 states and 308 transitions. [2021-11-19 04:45:28,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:45:28,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 18.5) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 166 [2021-11-19 04:45:28,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:28,973 INFO L225 Difference]: With dead ends: 274 [2021-11-19 04:45:28,974 INFO L226 Difference]: Without dead ends: 274 [2021-11-19 04:45:28,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:45:28,976 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 3 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:28,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 395 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:45:28,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-19 04:45:28,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2021-11-19 04:45:28,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 159 states have (on average 1.5157232704402517) internal successors, (241), 224 states have internal predecessors, (241), 34 states have call successors, (34), 20 states have call predecessors, (34), 17 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-19 04:45:28,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 308 transitions. [2021-11-19 04:45:28,987 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 308 transitions. Word has length 166 [2021-11-19 04:45:28,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:28,987 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 308 transitions. [2021-11-19 04:45:28,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 18.5) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-19 04:45:28,988 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 308 transitions. [2021-11-19 04:45:28,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-19 04:45:28,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:28,989 INFO L514 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:29,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-19 04:45:29,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-19 04:45:29,215 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting l2_insertErr0REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:45:29,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:29,215 INFO L85 PathProgramCache]: Analyzing trace with hash 982849424, now seen corresponding path program 1 times [2021-11-19 04:45:29,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:45:29,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612663286] [2021-11-19 04:45:29,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:29,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:45:29,230 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:45:29,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175519420] [2021-11-19 04:45:29,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:29,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:45:29,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:45:29,231 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:45:29,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-19 04:45:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:45:29,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-19 04:45:29,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:29,744 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-19 04:45:29,849 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-19 04:45:29,849 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 [2021-11-19 04:45:29,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 04:45:30,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 04:45:30,170 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 [2021-11-19 04:45:30,480 INFO L354 Elim1Store]: treesize reduction 155, result has 9.4 percent of original size [2021-11-19 04:45:30,480 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 5 case distinctions, treesize of input 32 treesize of output 36 [2021-11-19 04:45:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 433 proven. 137 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2021-11-19 04:45:30,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:45:30,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:45:30,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612663286] [2021-11-19 04:45:30,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:45:30,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175519420] [2021-11-19 04:45:30,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175519420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:45:30,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:45:30,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-19 04:45:30,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810021321] [2021-11-19 04:45:30,932 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:45:30,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-19 04:45:30,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:45:30,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-19 04:45:30,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-11-19 04:45:30,934 INFO L87 Difference]: Start difference. First operand 274 states and 308 transitions. Second operand has 28 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 9 states have call successors, (18), 4 states have call predecessors, (18), 11 states have return successors, (19), 12 states have call predecessors, (19), 8 states have call successors, (19) [2021-11-19 04:45:31,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:31,454 INFO L93 Difference]: Finished difference Result 319 states and 365 transitions. [2021-11-19 04:45:31,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 04:45:31,454 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 9 states have call successors, (18), 4 states have call predecessors, (18), 11 states have return successors, (19), 12 states have call predecessors, (19), 8 states have call successors, (19) Word has length 171 [2021-11-19 04:45:31,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:31,457 INFO L225 Difference]: With dead ends: 319 [2021-11-19 04:45:31,457 INFO L226 Difference]: Without dead ends: 319 [2021-11-19 04:45:31,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 147 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 04:45:31,458 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 79 mSDsluCounter, 1886 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:31,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 2082 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 800 Invalid, 0 Unknown, 253 Unchecked, 0.4s Time] [2021-11-19 04:45:31,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-19 04:45:31,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 278. [2021-11-19 04:45:31,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 162 states have (on average 1.5061728395061729) internal successors, (244), 228 states have internal predecessors, (244), 34 states have call successors, (34), 20 states have call predecessors, (34), 18 states have return successors, (37), 30 states have call predecessors, (37), 33 states have call successors, (37) [2021-11-19 04:45:31,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 315 transitions. [2021-11-19 04:45:31,469 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 315 transitions. Word has length 171 [2021-11-19 04:45:31,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:31,469 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 315 transitions. [2021-11-19 04:45:31,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 9 states have call successors, (18), 4 states have call predecessors, (18), 11 states have return successors, (19), 12 states have call predecessors, (19), 8 states have call successors, (19) [2021-11-19 04:45:31,470 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 315 transitions. [2021-11-19 04:45:31,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-19 04:45:31,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:31,471 INFO L514 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:31,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-19 04:45:31,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-19 04:45:31,683 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting l2_insertErr1REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:45:31,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:31,683 INFO L85 PathProgramCache]: Analyzing trace with hash 982849425, now seen corresponding path program 1 times [2021-11-19 04:45:31,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:45:31,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457498520] [2021-11-19 04:45:31,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:31,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:45:31,694 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:45:31,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951019257] [2021-11-19 04:45:31,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:31,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:45:31,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:45:31,695 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:45:31,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-19 04:45:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:45:32,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 204 conjunts are in the unsatisfiable core [2021-11-19 04:45:32,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:32,895 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-19 04:45:32,976 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 [2021-11-19 04:45:32,980 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 8 treesize of output 7 [2021-11-19 04:45:34,508 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 20 treesize of output 19 [2021-11-19 04:45:34,510 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 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-19 04:45:34,978 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-19 04:45:34,979 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 [2021-11-19 04:45:34,989 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 26 treesize of output 26 [2021-11-19 04:45:35,755 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 20 treesize of output 19 [2021-11-19 04:45:35,758 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 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-19 04:45:36,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2021-11-19 04:45:36,647 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 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-19 04:45:37,079 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 14 treesize of output 13 [2021-11-19 04:45:37,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-11-19 04:45:38,110 INFO L354 Elim1Store]: treesize reduction 105, result has 16.0 percent of original size [2021-11-19 04:45:38,111 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 3 case distinctions, treesize of input 74 treesize of output 78 [2021-11-19 04:45:38,232 INFO L354 Elim1Store]: treesize reduction 56, result has 30.9 percent of original size [2021-11-19 04:45:38,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 80 treesize of output 94 [2021-11-19 04:45:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 224 proven. 391 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-19 04:45:47,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:45:47,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:45:47,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457498520] [2021-11-19 04:45:47,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:45:47,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951019257] [2021-11-19 04:45:47,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951019257] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:45:47,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:45:47,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-11-19 04:45:47,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182494610] [2021-11-19 04:45:47,935 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:45:47,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-19 04:45:47,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:45:47,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-19 04:45:47,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1556, Unknown=3, NotChecked=0, Total=1722 [2021-11-19 04:45:47,937 INFO L87 Difference]: Start difference. First operand 278 states and 315 transitions. Second operand has 40 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 31 states have internal predecessors, (83), 13 states have call successors, (21), 4 states have call predecessors, (21), 13 states have return successors, (20), 15 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-19 04:45:51,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:51,355 INFO L93 Difference]: Finished difference Result 336 states and 388 transitions. [2021-11-19 04:45:51,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-19 04:45:51,359 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 31 states have internal predecessors, (83), 13 states have call successors, (21), 4 states have call predecessors, (21), 13 states have return successors, (20), 15 states have call predecessors, (20), 12 states have call successors, (20) Word has length 171 [2021-11-19 04:45:51,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:51,362 INFO L225 Difference]: With dead ends: 336 [2021-11-19 04:45:51,363 INFO L226 Difference]: Without dead ends: 336 [2021-11-19 04:45:51,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 129 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=235, Invalid=2312, Unknown=3, NotChecked=0, Total=2550 [2021-11-19 04:45:51,364 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 40 mSDsluCounter, 1425 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1622 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1188 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:51,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 1622 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 576 Invalid, 0 Unknown, 1188 Unchecked, 1.0s Time] [2021-11-19 04:45:51,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-11-19 04:45:51,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 294. [2021-11-19 04:45:51,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 174 states have (on average 1.4942528735632183) internal successors, (260), 240 states have internal predecessors, (260), 37 states have call successors, (37), 21 states have call predecessors, (37), 19 states have return successors, (41), 33 states have call predecessors, (41), 36 states have call successors, (41) [2021-11-19 04:45:51,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 338 transitions. [2021-11-19 04:45:51,375 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 338 transitions. Word has length 171 [2021-11-19 04:45:51,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:51,376 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 338 transitions. [2021-11-19 04:45:51,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 31 states have internal predecessors, (83), 13 states have call successors, (21), 4 states have call predecessors, (21), 13 states have return successors, (20), 15 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-19 04:45:51,377 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 338 transitions. [2021-11-19 04:45:51,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-19 04:45:51,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:51,380 INFO L514 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:51,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-19 04:45:51,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-19 04:45:51,595 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting l2_insertErr2REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:45:51,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:51,595 INFO L85 PathProgramCache]: Analyzing trace with hash 403561202, now seen corresponding path program 1 times [2021-11-19 04:45:51,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:45:51,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290105041] [2021-11-19 04:45:51,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:51,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:45:51,609 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:45:51,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433226272] [2021-11-19 04:45:51,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:51,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:45:51,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:45:51,619 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:45:51,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-19 04:45:51,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:45:51,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 04:45:51,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:52,210 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2021-11-19 04:45:52,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:45:52,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:45:52,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290105041] [2021-11-19 04:45:52,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:45:52,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433226272] [2021-11-19 04:45:52,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433226272] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:45:52,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:45:52,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:45:52,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813222636] [2021-11-19 04:45:52,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:45:52,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:45:52,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:45:52,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:45:52,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:45:52,214 INFO L87 Difference]: Start difference. First operand 294 states and 338 transitions. Second operand has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 04:45:52,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:52,441 INFO L93 Difference]: Finished difference Result 293 states and 337 transitions. [2021-11-19 04:45:52,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:45:52,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 172 [2021-11-19 04:45:52,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:52,445 INFO L225 Difference]: With dead ends: 293 [2021-11-19 04:45:52,445 INFO L226 Difference]: Without dead ends: 293 [2021-11-19 04:45:52,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:45:52,446 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 21 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:52,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 727 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:45:52,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-19 04:45:52,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-11-19 04:45:52,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 174 states have (on average 1.4885057471264367) internal successors, (259), 239 states have internal predecessors, (259), 37 states have call successors, (37), 21 states have call predecessors, (37), 19 states have return successors, (41), 33 states have call predecessors, (41), 36 states have call successors, (41) [2021-11-19 04:45:52,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 337 transitions. [2021-11-19 04:45:52,456 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 337 transitions. Word has length 172 [2021-11-19 04:45:52,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:52,457 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 337 transitions. [2021-11-19 04:45:52,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 04:45:52,457 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 337 transitions. [2021-11-19 04:45:52,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-19 04:45:52,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:52,459 INFO L514 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:52,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-19 04:45:52,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:45:52,671 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting l2_insertErr3REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:45:52,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:52,672 INFO L85 PathProgramCache]: Analyzing trace with hash 403561203, now seen corresponding path program 1 times [2021-11-19 04:45:52,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:45:52,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404383336] [2021-11-19 04:45:52,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:52,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:45:52,685 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:45:52,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966227486] [2021-11-19 04:45:52,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:52,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:45:52,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:45:52,696 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:45:52,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-19 04:45:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:45:52,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-19 04:45:52,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 815 trivial. 0 not checked. [2021-11-19 04:45:53,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:45:53,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-19 04:45:53,674 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:45:53,674 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 13 treesize of output 17 [2021-11-19 04:45:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 815 trivial. 0 not checked. [2021-11-19 04:45:54,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:45:54,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404383336] [2021-11-19 04:45:54,255 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:45:54,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966227486] [2021-11-19 04:45:54,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966227486] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:45:54,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:45:54,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-11-19 04:45:54,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651183956] [2021-11-19 04:45:54,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:45:54,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 04:45:54,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:45:54,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 04:45:54,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-11-19 04:45:54,258 INFO L87 Difference]: Start difference. First operand 293 states and 337 transitions. Second operand has 22 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 7 states have call successors, (20), 1 states have call predecessors, (20), 7 states have return successors, (19), 11 states have call predecessors, (19), 7 states have call successors, (19) [2021-11-19 04:45:54,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:54,847 INFO L93 Difference]: Finished difference Result 292 states and 336 transitions. [2021-11-19 04:45:54,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:45:54,849 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 7 states have call successors, (20), 1 states have call predecessors, (20), 7 states have return successors, (19), 11 states have call predecessors, (19), 7 states have call successors, (19) Word has length 172 [2021-11-19 04:45:54,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:54,850 INFO L225 Difference]: With dead ends: 292 [2021-11-19 04:45:54,850 INFO L226 Difference]: Without dead ends: 292 [2021-11-19 04:45:54,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-11-19 04:45:54,851 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 39 mSDsluCounter, 3167 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:54,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 3380 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:45:54,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-19 04:45:54,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2021-11-19 04:45:54,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 238 states have internal predecessors, (258), 37 states have call successors, (37), 21 states have call predecessors, (37), 19 states have return successors, (41), 33 states have call predecessors, (41), 36 states have call successors, (41) [2021-11-19 04:45:54,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 336 transitions. [2021-11-19 04:45:54,861 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 336 transitions. Word has length 172 [2021-11-19 04:45:54,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:54,861 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 336 transitions. [2021-11-19 04:45:54,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 7 states have call successors, (20), 1 states have call predecessors, (20), 7 states have return successors, (19), 11 states have call predecessors, (19), 7 states have call successors, (19) [2021-11-19 04:45:54,861 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 336 transitions. [2021-11-19 04:45:54,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-19 04:45:54,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:54,863 INFO L514 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:54,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-19 04:45:55,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-19 04:45:55,076 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting l2_insertErr4REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:45:55,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:55,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1275262739, now seen corresponding path program 1 times [2021-11-19 04:45:55,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:45:55,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970767857] [2021-11-19 04:45:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:55,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:45:55,087 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:45:55,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520711459] [2021-11-19 04:45:55,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:55,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:45:55,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:45:55,091 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:45:55,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-19 04:45:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:45:55,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 992 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:45:55,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2021-11-19 04:45:55,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:45:55,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:45:55,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970767857] [2021-11-19 04:45:55,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:45:55,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520711459] [2021-11-19 04:45:55,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520711459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:45:55,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:45:55,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:45:55,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215346584] [2021-11-19 04:45:55,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:45:55,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:45:55,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:45:55,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:45:55,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:45:55,605 INFO L87 Difference]: Start difference. First operand 292 states and 336 transitions. Second operand has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-19 04:45:55,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:55,704 INFO L93 Difference]: Finished difference Result 291 states and 335 transitions. [2021-11-19 04:45:55,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:45:55,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) Word has length 174 [2021-11-19 04:45:55,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:55,706 INFO L225 Difference]: With dead ends: 291 [2021-11-19 04:45:55,706 INFO L226 Difference]: Without dead ends: 291 [2021-11-19 04:45:55,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:45:55,707 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 3 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:55,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 378 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:45:55,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-19 04:45:55,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2021-11-19 04:45:55,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 174 states have (on average 1.4770114942528736) internal successors, (257), 237 states have internal predecessors, (257), 37 states have call successors, (37), 21 states have call predecessors, (37), 19 states have return successors, (41), 33 states have call predecessors, (41), 36 states have call successors, (41) [2021-11-19 04:45:55,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 335 transitions. [2021-11-19 04:45:55,731 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 335 transitions. Word has length 174 [2021-11-19 04:45:55,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:55,732 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 335 transitions. [2021-11-19 04:45:55,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-19 04:45:55,732 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 335 transitions. [2021-11-19 04:45:55,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-19 04:45:55,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:55,734 INFO L514 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:55,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-19 04:45:55,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:45:55,958 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting l2_insertErr5REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:45:55,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:55,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1275262740, now seen corresponding path program 1 times [2021-11-19 04:45:55,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:45:55,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054373286] [2021-11-19 04:45:55,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:55,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:45:55,980 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:45:55,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609481178] [2021-11-19 04:45:55,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:55,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:45:55,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:45:55,981 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:45:56,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-19 04:45:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:45:56,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 992 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:45:56,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2021-11-19 04:45:56,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:45:56,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:45:56,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054373286] [2021-11-19 04:45:56,542 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:45:56,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609481178] [2021-11-19 04:45:56,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609481178] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:45:56,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:45:56,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:45:56,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851051368] [2021-11-19 04:45:56,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:45:56,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:45:56,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:45:56,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:45:56,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:45:56,544 INFO L87 Difference]: Start difference. First operand 291 states and 335 transitions. Second operand has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-19 04:45:56,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:56,724 INFO L93 Difference]: Finished difference Result 290 states and 334 transitions. [2021-11-19 04:45:56,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:45:56,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) Word has length 174 [2021-11-19 04:45:56,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:56,726 INFO L225 Difference]: With dead ends: 290 [2021-11-19 04:45:56,726 INFO L226 Difference]: Without dead ends: 290 [2021-11-19 04:45:56,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:45:56,727 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 2 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:56,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 390 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:45:56,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-19 04:45:56,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2021-11-19 04:45:56,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 174 states have (on average 1.471264367816092) internal successors, (256), 236 states have internal predecessors, (256), 37 states have call successors, (37), 21 states have call predecessors, (37), 19 states have return successors, (41), 33 states have call predecessors, (41), 36 states have call successors, (41) [2021-11-19 04:45:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 334 transitions. [2021-11-19 04:45:56,736 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 334 transitions. Word has length 174 [2021-11-19 04:45:56,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:56,736 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 334 transitions. [2021-11-19 04:45:56,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-19 04:45:56,737 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 334 transitions. [2021-11-19 04:45:56,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-19 04:45:56,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:56,738 INFO L514 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:56,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-19 04:45:56,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:45:56,943 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting l1_insertErr0REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:45:56,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:56,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1966470170, now seen corresponding path program 1 times [2021-11-19 04:45:56,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:45:56,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436189139] [2021-11-19 04:45:56,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:56,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:45:56,955 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:45:56,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362340068] [2021-11-19 04:45:56,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:45:56,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:45:56,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:45:56,957 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:45:56,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-19 04:45:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:45:57,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-19 04:45:57,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:57,416 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-19 04:45:57,533 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-19 04:45:57,533 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 [2021-11-19 04:45:57,585 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-19 04:45:57,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 04:45:57,889 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 [2021-11-19 04:45:57,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 04:45:58,527 INFO L354 Elim1Store]: treesize reduction 251, result has 11.9 percent of original size [2021-11-19 04:45:58,527 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 9 case distinctions, treesize of input 35 treesize of output 52 [2021-11-19 04:46:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 188 proven. 246 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2021-11-19 04:46:00,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:00,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:00,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436189139] [2021-11-19 04:46:00,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:46:00,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362340068] [2021-11-19 04:46:00,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362340068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:00,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:46:00,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-19 04:46:00,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403609212] [2021-11-19 04:46:00,691 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:00,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-19 04:46:00,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:00,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-19 04:46:00,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-11-19 04:46:00,692 INFO L87 Difference]: Start difference. First operand 290 states and 334 transitions. Second operand has 30 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 10 states have call successors, (18), 4 states have call predecessors, (18), 12 states have return successors, (19), 14 states have call predecessors, (19), 9 states have call successors, (19) [2021-11-19 04:46:01,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:01,194 INFO L93 Difference]: Finished difference Result 365 states and 432 transitions. [2021-11-19 04:46:01,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 04:46:01,198 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 10 states have call successors, (18), 4 states have call predecessors, (18), 12 states have return successors, (19), 14 states have call predecessors, (19), 9 states have call successors, (19) Word has length 179 [2021-11-19 04:46:01,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:01,201 INFO L225 Difference]: With dead ends: 365 [2021-11-19 04:46:01,201 INFO L226 Difference]: Without dead ends: 365 [2021-11-19 04:46:01,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 145 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 04:46:01,204 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 90 mSDsluCounter, 1979 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 2175 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 508 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:01,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 2175 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 762 Invalid, 0 Unknown, 508 Unchecked, 0.4s Time] [2021-11-19 04:46:01,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-19 04:46:01,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 320. [2021-11-19 04:46:01,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 195 states have (on average 1.4615384615384615) internal successors, (285), 259 states have internal predecessors, (285), 44 states have call successors, (44), 23 states have call predecessors, (44), 21 states have return successors, (53), 38 states have call predecessors, (53), 43 states have call successors, (53) [2021-11-19 04:46:01,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 382 transitions. [2021-11-19 04:46:01,223 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 382 transitions. Word has length 179 [2021-11-19 04:46:01,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:01,223 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 382 transitions. [2021-11-19 04:46:01,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 10 states have call successors, (18), 4 states have call predecessors, (18), 12 states have return successors, (19), 14 states have call predecessors, (19), 9 states have call successors, (19) [2021-11-19 04:46:01,224 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 382 transitions. [2021-11-19 04:46:01,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-19 04:46:01,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:01,225 INFO L514 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:01,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:01,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-19 04:46:01,439 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting l1_insertErr1REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:46:01,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:01,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1966470169, now seen corresponding path program 1 times [2021-11-19 04:46:01,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:01,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383301095] [2021-11-19 04:46:01,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:01,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:01,451 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:46:01,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520458005] [2021-11-19 04:46:01,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:01,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:01,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:01,462 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:01,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-19 04:46:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:02,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 185 conjunts are in the unsatisfiable core [2021-11-19 04:46:02,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:02,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2021-11-19 04:46:23,478 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 20 treesize of output 19 [2021-11-19 04:46:23,481 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 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-19 04:46:24,426 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-19 04:46:24,426 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 26 treesize of output 30 [2021-11-19 04:46:24,744 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-19 04:46:24,745 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 [2021-11-19 04:46:25,436 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 20 treesize of output 19 [2021-11-19 04:46:25,440 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 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-19 04:46:26,618 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 15 treesize of output 14 [2021-11-19 04:46:26,624 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 14 treesize of output 13 [2021-11-19 04:46:28,102 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 20 treesize of output 19 [2021-11-19 04:46:28,106 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 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-19 04:46:29,016 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 14 treesize of output 13 [2021-11-19 04:46:29,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-11-19 04:46:36,255 INFO L354 Elim1Store]: treesize reduction 176, result has 16.6 percent of original size [2021-11-19 04:46:36,255 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 4 case distinctions, treesize of input 90 treesize of output 104 [2021-11-19 04:46:36,475 INFO L354 Elim1Store]: treesize reduction 56, result has 30.9 percent of original size [2021-11-19 04:46:36,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 109 treesize of output 123 [2021-11-19 04:48:57,707 WARN L227 SmtUtils]: Spent 1.82m on a formula simplification. DAG size of input: 86 DAG size of output: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:49:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 21 proven. 307 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2021-11-19 04:49:00,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:49:04,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:04,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383301095] [2021-11-19 04:49:04,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:49:04,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520458005] [2021-11-19 04:49:04,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520458005] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:49:04,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:49:04,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-11-19 04:49:04,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667834665] [2021-11-19 04:49:04,310 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:49:04,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-19 04:49:04,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:04,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-19 04:49:04,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1500, Unknown=10, NotChecked=0, Total=1640 [2021-11-19 04:49:04,312 INFO L87 Difference]: Start difference. First operand 320 states and 382 transitions. Second operand has 39 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 29 states have internal predecessors, (78), 12 states have call successors, (19), 4 states have call predecessors, (19), 13 states have return successors, (20), 17 states have call predecessors, (20), 11 states have call successors, (20) [2021-11-19 04:49:11,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:11,324 INFO L93 Difference]: Finished difference Result 390 states and 471 transitions. [2021-11-19 04:49:11,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-19 04:49:11,325 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 29 states have internal predecessors, (78), 12 states have call successors, (19), 4 states have call predecessors, (19), 13 states have return successors, (20), 17 states have call predecessors, (20), 11 states have call successors, (20) Word has length 179 [2021-11-19 04:49:11,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:11,329 INFO L225 Difference]: With dead ends: 390 [2021-11-19 04:49:11,329 INFO L226 Difference]: Without dead ends: 390 [2021-11-19 04:49:11,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 132 SyntacticMatches, 14 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 167.6s TimeCoverageRelationStatistics Valid=181, Invalid=2063, Unknown=12, NotChecked=0, Total=2256 [2021-11-19 04:49:11,331 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 41 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 2208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2005 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:11,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 1685 Invalid, 2208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 182 Invalid, 0 Unknown, 2005 Unchecked, 0.6s Time] [2021-11-19 04:49:11,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-19 04:49:11,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 360. [2021-11-19 04:49:11,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 225 states have (on average 1.4222222222222223) internal successors, (320), 289 states have internal predecessors, (320), 51 states have call successors, (51), 26 states have call predecessors, (51), 24 states have return successors, (62), 45 states have call predecessors, (62), 50 states have call successors, (62) [2021-11-19 04:49:11,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 433 transitions. [2021-11-19 04:49:11,350 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 433 transitions. Word has length 179 [2021-11-19 04:49:11,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:11,351 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 433 transitions. [2021-11-19 04:49:11,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 29 states have internal predecessors, (78), 12 states have call successors, (19), 4 states have call predecessors, (19), 13 states have return successors, (20), 17 states have call predecessors, (20), 11 states have call successors, (20) [2021-11-19 04:49:11,351 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 433 transitions. [2021-11-19 04:49:11,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-19 04:49:11,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:11,353 INFO L514 BasicCegarLoop]: trace histogram [40, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:11,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-19 04:49:11,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-19 04:49:11,579 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting l4_insertErr2REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:49:11,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:11,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1677810928, now seen corresponding path program 1 times [2021-11-19 04:49:11,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:11,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540647493] [2021-11-19 04:49:11,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:11,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:11,606 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:49:11,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154906307] [2021-11-19 04:49:11,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:11,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:11,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:49:11,608 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:49:11,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-19 04:49:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:12,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-19 04:49:12,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:49:12,402 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 [2021-11-19 04:49:12,572 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 04:49:12,572 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 [2021-11-19 04:49:12,613 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 [2021-11-19 04:49:12,712 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 04:49:12,712 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 [2021-11-19 04:49:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1556 backedges. 614 proven. 6 refuted. 0 times theorem prover too weak. 936 trivial. 0 not checked. [2021-11-19 04:49:12,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:49:13,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:13,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540647493] [2021-11-19 04:49:13,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:49:13,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154906307] [2021-11-19 04:49:13,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154906307] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:49:13,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:49:13,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-19 04:49:13,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624177930] [2021-11-19 04:49:13,032 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:49:13,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:49:13,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:13,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:49:13,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:49:13,034 INFO L87 Difference]: Start difference. First operand 360 states and 433 transitions. Second operand has 11 states, 9 states have (on average 5.555555555555555) internal successors, (50), 10 states have internal predecessors, (50), 6 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-19 04:49:13,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:13,846 INFO L93 Difference]: Finished difference Result 385 states and 463 transitions. [2021-11-19 04:49:13,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:49:13,847 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.555555555555555) internal successors, (50), 10 states have internal predecessors, (50), 6 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 212 [2021-11-19 04:49:13,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:13,849 INFO L225 Difference]: With dead ends: 385 [2021-11-19 04:49:13,849 INFO L226 Difference]: Without dead ends: 385 [2021-11-19 04:49:13,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 205 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:49:13,850 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 79 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:13,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 1175 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 414 Invalid, 0 Unknown, 212 Unchecked, 0.6s Time] [2021-11-19 04:49:13,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-19 04:49:13,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 359. [2021-11-19 04:49:13,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 225 states have (on average 1.4177777777777778) internal successors, (319), 288 states have internal predecessors, (319), 51 states have call successors, (51), 26 states have call predecessors, (51), 24 states have return successors, (62), 45 states have call predecessors, (62), 50 states have call successors, (62) [2021-11-19 04:49:13,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 432 transitions. [2021-11-19 04:49:13,866 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 432 transitions. Word has length 212 [2021-11-19 04:49:13,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:13,867 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 432 transitions. [2021-11-19 04:49:13,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.555555555555555) internal successors, (50), 10 states have internal predecessors, (50), 6 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-19 04:49:13,868 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 432 transitions. [2021-11-19 04:49:13,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-19 04:49:13,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:13,870 INFO L514 BasicCegarLoop]: trace histogram [40, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:13,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-19 04:49:14,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-19 04:49:14,095 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting l4_insertErr3REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:49:14,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:14,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1677810929, now seen corresponding path program 1 times [2021-11-19 04:49:14,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:14,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939828699] [2021-11-19 04:49:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:14,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:14,118 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:49:14,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134919541] [2021-11-19 04:49:14,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:14,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:14,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:49:14,120 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:49:14,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-19 04:49:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:14,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-19 04:49:14,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:49:15,407 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 20 treesize of output 19 [2021-11-19 04:49:15,411 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 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-19 04:49:15,943 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-19 04:49:15,943 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 30 treesize of output 32 [2021-11-19 04:49:15,973 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-19 04:49:15,973 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 29 treesize of output 33 [2021-11-19 04:49:16,237 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 14 treesize of output 13 [2021-11-19 04:49:16,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-11-19 04:49:16,569 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-19 04:49:16,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 45 [2021-11-19 04:49:16,611 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-19 04:49:16,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2021-11-19 04:49:23,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1556 backedges. 382 proven. 86 refuted. 0 times theorem prover too weak. 1088 trivial. 0 not checked. [2021-11-19 04:49:23,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:49:23,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:23,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939828699] [2021-11-19 04:49:23,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:49:23,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134919541] [2021-11-19 04:49:23,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134919541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:49:23,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:49:23,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-19 04:49:23,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640455513] [2021-11-19 04:49:23,646 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:49:23,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 04:49:23,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:23,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 04:49:23,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=485, Unknown=2, NotChecked=0, Total=552 [2021-11-19 04:49:23,648 INFO L87 Difference]: Start difference. First operand 359 states and 432 transitions. Second operand has 22 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 19 states have internal predecessors, (62), 10 states have call successors, (22), 4 states have call predecessors, (22), 7 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2021-11-19 04:49:49,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:49,817 INFO L93 Difference]: Finished difference Result 384 states and 462 transitions. [2021-11-19 04:49:49,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 04:49:49,818 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 19 states have internal predecessors, (62), 10 states have call successors, (22), 4 states have call predecessors, (22), 7 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) Word has length 212 [2021-11-19 04:49:49,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:49,821 INFO L225 Difference]: With dead ends: 384 [2021-11-19 04:49:49,822 INFO L226 Difference]: Without dead ends: 384 [2021-11-19 04:49:49,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 194 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 32.2s TimeCoverageRelationStatistics Valid=158, Invalid=1166, Unknown=8, NotChecked=0, Total=1332 [2021-11-19 04:49:49,824 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 75 mSDsluCounter, 2035 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 2228 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 445 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:49,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 2228 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 709 Invalid, 0 Unknown, 445 Unchecked, 1.1s Time] [2021-11-19 04:49:49,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-19 04:49:49,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 358. [2021-11-19 04:49:49,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 225 states have (on average 1.4133333333333333) internal successors, (318), 287 states have internal predecessors, (318), 51 states have call successors, (51), 26 states have call predecessors, (51), 24 states have return successors, (62), 45 states have call predecessors, (62), 50 states have call successors, (62) [2021-11-19 04:49:49,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 431 transitions. [2021-11-19 04:49:49,840 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 431 transitions. Word has length 212 [2021-11-19 04:49:49,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:49,841 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 431 transitions. [2021-11-19 04:49:49,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 19 states have internal predecessors, (62), 10 states have call successors, (22), 4 states have call predecessors, (22), 7 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2021-11-19 04:49:49,842 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 431 transitions. [2021-11-19 04:49:49,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-19 04:49:49,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:49,844 INFO L514 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:49,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-19 04:49:50,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:50,059 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting l1_insertErr2REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:49:50,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:50,059 INFO L85 PathProgramCache]: Analyzing trace with hash -831033068, now seen corresponding path program 1 times [2021-11-19 04:49:50,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:50,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616242156] [2021-11-19 04:49:50,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:50,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:50,081 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:49:50,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747571640] [2021-11-19 04:49:50,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:50,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:50,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:49:50,083 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:49:50,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-19 04:49:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:50,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 04:49:50,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:49:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2021-11-19 04:49:50,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:49:50,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:50,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616242156] [2021-11-19 04:49:50,882 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:49:50,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747571640] [2021-11-19 04:49:50,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747571640] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:50,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:50,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:49:50,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17298944] [2021-11-19 04:49:50,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:50,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:49:50,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:50,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:49:50,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:49:50,885 INFO L87 Difference]: Start difference. First operand 358 states and 431 transitions. Second operand has 5 states, 4 states have (on average 12.25) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 04:49:51,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:51,219 INFO L93 Difference]: Finished difference Result 357 states and 430 transitions. [2021-11-19 04:49:51,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:49:51,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 180 [2021-11-19 04:49:51,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:51,223 INFO L225 Difference]: With dead ends: 357 [2021-11-19 04:49:51,224 INFO L226 Difference]: Without dead ends: 357 [2021-11-19 04:49:51,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:49:51,225 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 19 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:51,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 711 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:49:51,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-11-19 04:49:51,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 357. [2021-11-19 04:49:51,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 225 states have (on average 1.4088888888888889) internal successors, (317), 286 states have internal predecessors, (317), 51 states have call successors, (51), 26 states have call predecessors, (51), 24 states have return successors, (62), 45 states have call predecessors, (62), 50 states have call successors, (62) [2021-11-19 04:49:51,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 430 transitions. [2021-11-19 04:49:51,243 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 430 transitions. Word has length 180 [2021-11-19 04:49:51,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:51,243 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 430 transitions. [2021-11-19 04:49:51,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 04:49:51,245 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 430 transitions. [2021-11-19 04:49:51,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-19 04:49:51,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:51,247 INFO L514 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:51,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-19 04:49:51,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:51,475 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting l1_insertErr3REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:49:51,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:51,475 INFO L85 PathProgramCache]: Analyzing trace with hash -831033067, now seen corresponding path program 1 times [2021-11-19 04:49:51,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:51,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592855885] [2021-11-19 04:49:51,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:51,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:51,499 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:49:51,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [417496086] [2021-11-19 04:49:51,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:51,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:51,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:49:51,501 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:49:51,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-19 04:49:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:53,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 186 conjunts are in the unsatisfiable core [2021-11-19 04:49:53,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:49:53,400 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-19 04:49:53,535 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 [2021-11-19 04:49:55,702 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 20 treesize of output 19 [2021-11-19 04:49:55,708 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 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-19 04:49:57,330 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 20 treesize of output 19 [2021-11-19 04:49:57,334 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 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-19 04:49:58,895 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 20 treesize of output 19 [2021-11-19 04:49:58,899 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 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-19 04:49:59,640 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 14 treesize of output 13 [2021-11-19 04:49:59,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-11-19 04:50:05,047 INFO L354 Elim1Store]: treesize reduction 184, result has 12.8 percent of original size [2021-11-19 04:50:05,047 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 4 case distinctions, treesize of input 72 treesize of output 80 [2021-11-19 04:50:05,144 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-19 04:50:05,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 83 treesize of output 89 [2021-11-19 04:50:14,361 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 226 proven. 392 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-11-19 04:50:14,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:50:18,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:18,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592855885] [2021-11-19 04:50:18,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:50:18,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417496086] [2021-11-19 04:50:18,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417496086] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:50:18,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:50:18,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2021-11-19 04:50:18,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231532503] [2021-11-19 04:50:18,945 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:50:18,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-19 04:50:18,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:18,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-19 04:50:18,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1644, Unknown=1, NotChecked=0, Total=1806 [2021-11-19 04:50:18,947 INFO L87 Difference]: Start difference. First operand 357 states and 430 transitions. Second operand has 41 states, 31 states have (on average 2.967741935483871) internal successors, (92), 33 states have internal predecessors, (92), 13 states have call successors, (21), 3 states have call predecessors, (21), 14 states have return successors, (21), 16 states have call predecessors, (21), 13 states have call successors, (21) [2021-11-19 04:50:23,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:23,192 INFO L93 Difference]: Finished difference Result 410 states and 495 transitions. [2021-11-19 04:50:23,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-19 04:50:23,197 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 31 states have (on average 2.967741935483871) internal successors, (92), 33 states have internal predecessors, (92), 13 states have call successors, (21), 3 states have call predecessors, (21), 14 states have return successors, (21), 16 states have call predecessors, (21), 13 states have call successors, (21) Word has length 180 [2021-11-19 04:50:23,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:23,201 INFO L225 Difference]: With dead ends: 410 [2021-11-19 04:50:23,202 INFO L226 Difference]: Without dead ends: 410 [2021-11-19 04:50:23,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 138 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=222, Invalid=2327, Unknown=1, NotChecked=0, Total=2550 [2021-11-19 04:50:23,205 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 41 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 2162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1721 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:23,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 1386 Invalid, 2162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 418 Invalid, 0 Unknown, 1721 Unchecked, 2.1s Time] [2021-11-19 04:50:23,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-19 04:50:23,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 353. [2021-11-19 04:50:23,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 224 states have (on average 1.4107142857142858) internal successors, (316), 284 states have internal predecessors, (316), 48 states have call successors, (48), 25 states have call predecessors, (48), 24 states have return successors, (58), 44 states have call predecessors, (58), 47 states have call successors, (58) [2021-11-19 04:50:23,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 422 transitions. [2021-11-19 04:50:23,223 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 422 transitions. Word has length 180 [2021-11-19 04:50:23,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:23,224 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 422 transitions. [2021-11-19 04:50:23,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 31 states have (on average 2.967741935483871) internal successors, (92), 33 states have internal predecessors, (92), 13 states have call successors, (21), 3 states have call predecessors, (21), 14 states have return successors, (21), 16 states have call predecessors, (21), 13 states have call successors, (21) [2021-11-19 04:50:23,224 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 422 transitions. [2021-11-19 04:50:23,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-19 04:50:23,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:23,226 INFO L514 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:23,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-19 04:50:23,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:23,443 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting l1_insertErr4REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:50:23,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:23,443 INFO L85 PathProgramCache]: Analyzing trace with hash 241140661, now seen corresponding path program 1 times [2021-11-19 04:50:23,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:23,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916365257] [2021-11-19 04:50:23,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:23,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:23,462 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:50:23,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919809876] [2021-11-19 04:50:23,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:23,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:23,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:50:23,464 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:50:23,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-19 04:50:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:23,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:50:23,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:50:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2021-11-19 04:50:24,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:50:24,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:24,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916365257] [2021-11-19 04:50:24,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:50:24,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919809876] [2021-11-19 04:50:24,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919809876] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:50:24,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:50:24,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:50:24,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828924132] [2021-11-19 04:50:24,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:50:24,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:50:24,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:24,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:50:24,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:50:24,263 INFO L87 Difference]: Start difference. First operand 353 states and 422 transitions. Second operand has 3 states, 2 states have (on average 25.5) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-19 04:50:24,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:24,505 INFO L93 Difference]: Finished difference Result 352 states and 421 transitions. [2021-11-19 04:50:24,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:50:24,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 25.5) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 182 [2021-11-19 04:50:24,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:24,509 INFO L225 Difference]: With dead ends: 352 [2021-11-19 04:50:24,509 INFO L226 Difference]: Without dead ends: 352 [2021-11-19 04:50:24,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:50:24,512 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 4 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:24,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 370 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:50:24,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-19 04:50:24,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2021-11-19 04:50:24,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 224 states have (on average 1.40625) internal successors, (315), 283 states have internal predecessors, (315), 48 states have call successors, (48), 25 states have call predecessors, (48), 24 states have return successors, (58), 44 states have call predecessors, (58), 47 states have call successors, (58) [2021-11-19 04:50:24,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 421 transitions. [2021-11-19 04:50:24,535 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 421 transitions. Word has length 182 [2021-11-19 04:50:24,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:24,536 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 421 transitions. [2021-11-19 04:50:24,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 25.5) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-19 04:50:24,536 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 421 transitions. [2021-11-19 04:50:24,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-19 04:50:24,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:24,538 INFO L514 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:24,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-19 04:50:24,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-19 04:50:24,756 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting l1_insertErr5REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:50:24,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:24,757 INFO L85 PathProgramCache]: Analyzing trace with hash 241140662, now seen corresponding path program 1 times [2021-11-19 04:50:24,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:24,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937006319] [2021-11-19 04:50:24,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:24,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:24,779 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:50:24,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585351329] [2021-11-19 04:50:24,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:24,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:24,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:50:24,781 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:50:24,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-19 04:50:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:25,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:50:25,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:50:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2021-11-19 04:50:25,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:50:25,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:25,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937006319] [2021-11-19 04:50:25,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:50:25,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585351329] [2021-11-19 04:50:25,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585351329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:50:25,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:50:25,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:50:25,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210378012] [2021-11-19 04:50:25,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:50:25,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:50:25,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:25,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:50:25,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:50:25,527 INFO L87 Difference]: Start difference. First operand 352 states and 421 transitions. Second operand has 3 states, 2 states have (on average 25.5) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-19 04:50:25,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:25,885 INFO L93 Difference]: Finished difference Result 351 states and 420 transitions. [2021-11-19 04:50:25,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:50:25,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 25.5) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 182 [2021-11-19 04:50:25,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:25,891 INFO L225 Difference]: With dead ends: 351 [2021-11-19 04:50:25,891 INFO L226 Difference]: Without dead ends: 351 [2021-11-19 04:50:25,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:50:25,892 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 3 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:25,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 381 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:50:25,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-11-19 04:50:25,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2021-11-19 04:50:25,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 224 states have (on average 1.4017857142857142) internal successors, (314), 282 states have internal predecessors, (314), 48 states have call successors, (48), 25 states have call predecessors, (48), 24 states have return successors, (58), 44 states have call predecessors, (58), 47 states have call successors, (58) [2021-11-19 04:50:25,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 420 transitions. [2021-11-19 04:50:25,906 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 420 transitions. Word has length 182 [2021-11-19 04:50:25,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:25,907 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 420 transitions. [2021-11-19 04:50:25,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 25.5) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-19 04:50:25,907 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 420 transitions. [2021-11-19 04:50:25,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-19 04:50:25,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:25,909 INFO L514 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:25,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-19 04:50:26,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-19 04:50:26,131 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting l0_insertErr0REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:50:26,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:26,131 INFO L85 PathProgramCache]: Analyzing trace with hash -655562519, now seen corresponding path program 1 times [2021-11-19 04:50:26,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:26,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872794597] [2021-11-19 04:50:26,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:26,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:26,155 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:50:26,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490556528] [2021-11-19 04:50:26,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:26,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:26,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:50:26,158 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:50:26,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-19 04:50:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:26,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 1034 conjuncts, 114 conjunts are in the unsatisfiable core [2021-11-19 04:50:26,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:50:26,542 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 [2021-11-19 04:50:26,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-19 04:50:26,934 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 10 treesize of output 9 [2021-11-19 04:50:27,410 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 04:50:27,411 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 17 treesize of output 19 [2021-11-19 04:50:27,639 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 [2021-11-19 04:50:28,254 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 [2021-11-19 04:50:28,609 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 [2021-11-19 04:50:28,975 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 [2021-11-19 04:50:29,347 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 [2021-11-19 04:50:34,435 INFO L354 Elim1Store]: treesize reduction 369, result has 6.6 percent of original size [2021-11-19 04:50:34,436 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 7 case distinctions, treesize of input 39 treesize of output 47 [2021-11-19 04:50:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 156 proven. 268 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-11-19 04:50:34,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:50:36,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:36,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872794597] [2021-11-19 04:50:36,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:50:36,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490556528] [2021-11-19 04:50:36,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490556528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:50:36,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:50:36,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-11-19 04:50:36,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493819391] [2021-11-19 04:50:36,641 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:50:36,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-19 04:50:36,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:36,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-19 04:50:36,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1058, Unknown=1, NotChecked=0, Total=1332 [2021-11-19 04:50:36,643 INFO L87 Difference]: Start difference. First operand 351 states and 420 transitions. Second operand has 33 states, 27 states have (on average 2.814814814814815) internal successors, (76), 25 states have internal predecessors, (76), 11 states have call successors, (16), 6 states have call predecessors, (16), 12 states have return successors, (17), 14 states have call predecessors, (17), 10 states have call successors, (17) [2021-11-19 04:50:38,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:38,306 INFO L93 Difference]: Finished difference Result 407 states and 494 transitions. [2021-11-19 04:50:38,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 04:50:38,307 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 27 states have (on average 2.814814814814815) internal successors, (76), 25 states have internal predecessors, (76), 11 states have call successors, (16), 6 states have call predecessors, (16), 12 states have return successors, (17), 14 states have call predecessors, (17), 10 states have call successors, (17) Word has length 187 [2021-11-19 04:50:38,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:38,311 INFO L225 Difference]: With dead ends: 407 [2021-11-19 04:50:38,311 INFO L226 Difference]: Without dead ends: 407 [2021-11-19 04:50:38,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 156 SyntacticMatches, 11 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=390, Invalid=1679, Unknown=1, NotChecked=0, Total=2070 [2021-11-19 04:50:38,313 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 84 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:38,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 929 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 83 Invalid, 0 Unknown, 168 Unchecked, 0.2s Time] [2021-11-19 04:50:38,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-11-19 04:50:38,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 364. [2021-11-19 04:50:38,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 232 states have (on average 1.396551724137931) internal successors, (324), 291 states have internal predecessors, (324), 52 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (66), 46 states have call predecessors, (66), 51 states have call successors, (66) [2021-11-19 04:50:38,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 442 transitions. [2021-11-19 04:50:38,330 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 442 transitions. Word has length 187 [2021-11-19 04:50:38,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:38,331 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 442 transitions. [2021-11-19 04:50:38,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 27 states have (on average 2.814814814814815) internal successors, (76), 25 states have internal predecessors, (76), 11 states have call successors, (16), 6 states have call predecessors, (16), 12 states have return successors, (17), 14 states have call predecessors, (17), 10 states have call successors, (17) [2021-11-19 04:50:38,331 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 442 transitions. [2021-11-19 04:50:38,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-19 04:50:38,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:38,333 INFO L514 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:38,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-19 04:50:38,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-19 04:50:38,559 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting l0_insertErr1REQUIRES_VIOLATION === [l3_destroyErr0REQUIRES_VIOLATION, l3_destroyErr1REQUIRES_VIOLATION, l3_destroyErr2REQUIRES_VIOLATION, l3_destroyErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-19 04:50:38,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:38,559 INFO L85 PathProgramCache]: Analyzing trace with hash -655562518, now seen corresponding path program 1 times [2021-11-19 04:50:38,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:38,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984704658] [2021-11-19 04:50:38,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:38,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:38,574 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:50:38,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [539674022] [2021-11-19 04:50:38,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:38,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:38,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:50:38,576 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:50:38,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_993bb2b2-ce34-4ab1-852a-7eaeca74b334/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-19 04:50:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:38,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 1034 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-19 04:50:38,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:50:39,022 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 [2021-11-19 04:50:39,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-19 04:50:39,380 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 [2021-11-19 04:50:41,417 WARN L860 $PredicateComparison]: unable to prove that (exists ((calloc_model_~size Int) (calloc_model_~nmemb Int) (calloc_model_~ptr~0.base Int)) (and (< calloc_model_~ptr~0.base |c_#StackHeapBarrier|) (= (* calloc_model_~size calloc_model_~nmemb) (select |c_#length| calloc_model_~ptr~0.base)))) is different from true [2021-11-19 04:50:43,992 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-19 04:50:43,993 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 17 treesize of output 19 [2021-11-19 04:50:48,159 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 04:50:48,159 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 19 treesize of output 15 [2021-11-19 04:50:48,209 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 [2021-11-19 04:50:50,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-19 04:50:53,622 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 [2021-11-19 04:50:56,335 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 [2021-11-19 04:50:59,035 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 [2021-11-19 04:51:41,417 INFO L354 Elim1Store]: treesize reduction 354, result has 20.1 percent of original size [2021-11-19 04:51:41,418 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 7 case distinctions, treesize of input 71 treesize of output 134