./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt --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 7546d6e17020b89cf8d45870128d84e73c6cd245 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-12 23:59:23,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-12 23:59:23,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-12 23:59:23,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-12 23:59:23,371 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-12 23:59:23,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-12 23:59:23,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-12 23:59:23,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-12 23:59:23,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-12 23:59:23,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-12 23:59:23,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-12 23:59:23,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-12 23:59:23,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-12 23:59:23,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-12 23:59:23,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-12 23:59:23,407 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-12 23:59:23,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-12 23:59:23,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-12 23:59:23,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-12 23:59:23,419 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-12 23:59:23,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-12 23:59:23,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-12 23:59:23,426 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-12 23:59:23,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-12 23:59:23,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-12 23:59:23,439 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-12 23:59:23,439 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-12 23:59:23,441 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-12 23:59:23,442 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-12 23:59:23,443 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-12 23:59:23,444 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-12 23:59:23,445 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-12 23:59:23,447 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-12 23:59:23,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-12 23:59:23,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-12 23:59:23,450 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-12 23:59:23,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-12 23:59:23,451 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-12 23:59:23,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-12 23:59:23,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-12 23:59:23,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-12 23:59:23,454 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-12 23:59:23,495 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-12 23:59:23,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-12 23:59:23,500 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-12 23:59:23,500 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-12 23:59:23,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-12 23:59:23,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-12 23:59:23,502 INFO L138 SettingsManager]: * Use SBE=true [2021-10-12 23:59:23,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-12 23:59:23,503 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-12 23:59:23,503 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-12 23:59:23,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-12 23:59:23,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-12 23:59:23,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-12 23:59:23,505 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-12 23:59:23,505 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-12 23:59:23,505 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-12 23:59:23,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-12 23:59:23,505 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-12 23:59:23,506 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-12 23:59:23,506 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-12 23:59:23,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-12 23:59:23,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-12 23:59:23,507 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-12 23:59:23,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-12 23:59:23,507 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-12 23:59:23,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-12 23:59:23,508 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-12 23:59:23,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-12 23:59:23,508 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-12 23:59:23,510 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_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7546d6e17020b89cf8d45870128d84e73c6cd245 [2021-10-12 23:59:23,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-12 23:59:23,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-12 23:59:23,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-12 23:59:23,772 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-12 23:59:23,773 INFO L275 PluginConnector]: CDTParser initialized [2021-10-12 23:59:23,775 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i [2021-10-12 23:59:23,872 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/data/1fbefd911/c832c2b7a58c4640a905164db2874cfb/FLAG385eee4c0 [2021-10-12 23:59:24,376 INFO L306 CDTParser]: Found 1 translation units. [2021-10-12 23:59:24,377 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i [2021-10-12 23:59:24,389 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/data/1fbefd911/c832c2b7a58c4640a905164db2874cfb/FLAG385eee4c0 [2021-10-12 23:59:24,687 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/data/1fbefd911/c832c2b7a58c4640a905164db2874cfb [2021-10-12 23:59:24,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-12 23:59:24,690 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-12 23:59:24,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-12 23:59:24,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-12 23:59:24,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-12 23:59:24,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:59:24" (1/1) ... [2021-10-12 23:59:24,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69c0ccbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:24, skipping insertion in model container [2021-10-12 23:59:24,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:59:24" (1/1) ... [2021-10-12 23:59:24,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-12 23:59:24,740 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-12 23:59:25,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-12 23:59:25,060 INFO L203 MainTranslator]: Completed pre-run [2021-10-12 23:59:25,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-12 23:59:25,141 INFO L208 MainTranslator]: Completed translation [2021-10-12 23:59:25,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:25 WrapperNode [2021-10-12 23:59:25,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-12 23:59:25,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-12 23:59:25,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-12 23:59:25,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-12 23:59:25,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:25" (1/1) ... [2021-10-12 23:59:25,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:25" (1/1) ... [2021-10-12 23:59:25,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:25" (1/1) ... [2021-10-12 23:59:25,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:25" (1/1) ... [2021-10-12 23:59:25,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:25" (1/1) ... [2021-10-12 23:59:25,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:25" (1/1) ... [2021-10-12 23:59:25,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:25" (1/1) ... [2021-10-12 23:59:25,202 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-12 23:59:25,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-12 23:59:25,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-12 23:59:25,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-12 23:59:25,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:25" (1/1) ... [2021-10-12 23:59:25,222 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-12 23:59:25,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:25,252 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:25,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-12 23:59:25,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-12 23:59:25,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-12 23:59:25,305 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-12 23:59:25,305 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-12 23:59:25,306 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-12 23:59:25,306 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2021-10-12 23:59:25,307 INFO L138 BoogieDeclarations]: Found implementation of procedure _destroy_in_nondeterministic_order [2021-10-12 23:59:25,308 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-12 23:59:25,308 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-12 23:59:25,308 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-12 23:59:25,309 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-12 23:59:25,310 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-12 23:59:25,310 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-12 23:59:25,310 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-12 23:59:25,310 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-12 23:59:25,311 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-12 23:59:25,311 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-12 23:59:25,311 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-12 23:59:25,312 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-12 23:59:25,312 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-12 23:59:25,316 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-12 23:59:25,317 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-12 23:59:25,317 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-12 23:59:25,317 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-12 23:59:25,317 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-12 23:59:25,318 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-12 23:59:25,318 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-12 23:59:25,318 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-12 23:59:25,318 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-12 23:59:25,318 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-12 23:59:25,318 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-12 23:59:25,319 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-12 23:59:25,319 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-12 23:59:25,319 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-12 23:59:25,319 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-12 23:59:25,319 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-12 23:59:25,320 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-12 23:59:25,320 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-12 23:59:25,320 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-12 23:59:25,320 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-12 23:59:25,320 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-12 23:59:25,320 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-12 23:59:25,320 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-12 23:59:25,320 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-12 23:59:25,321 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-12 23:59:25,321 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-12 23:59:25,321 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-12 23:59:25,321 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-12 23:59:25,322 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-12 23:59:25,322 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-12 23:59:25,322 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-12 23:59:25,322 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-12 23:59:25,322 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-12 23:59:25,323 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-12 23:59:25,323 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-12 23:59:25,324 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-12 23:59:25,324 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-12 23:59:25,324 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-12 23:59:25,324 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-12 23:59:25,325 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-12 23:59:25,325 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-12 23:59:25,325 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-12 23:59:25,325 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-12 23:59:25,325 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-12 23:59:25,326 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-12 23:59:25,326 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-12 23:59:25,326 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-12 23:59:25,326 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-12 23:59:25,328 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-12 23:59:25,328 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-12 23:59:25,328 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-12 23:59:25,329 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-12 23:59:25,329 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-12 23:59:25,329 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-12 23:59:25,329 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-12 23:59:25,329 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-12 23:59:25,329 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-12 23:59:25,329 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-12 23:59:25,330 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-12 23:59:25,330 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-12 23:59:25,330 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-12 23:59:25,331 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-12 23:59:25,331 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-12 23:59:25,331 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-12 23:59:25,331 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-12 23:59:25,331 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-12 23:59:25,331 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-12 23:59:25,332 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-12 23:59:25,332 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-12 23:59:25,332 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-12 23:59:25,332 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-12 23:59:25,332 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-12 23:59:25,332 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-12 23:59:25,332 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-12 23:59:25,332 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-12 23:59:25,333 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-12 23:59:25,333 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-12 23:59:25,333 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-12 23:59:25,333 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-12 23:59:25,333 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-12 23:59:25,333 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-12 23:59:25,333 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-12 23:59:25,333 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-12 23:59:25,333 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-12 23:59:25,334 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-12 23:59:25,334 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-12 23:59:25,334 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-12 23:59:25,334 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-12 23:59:25,334 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-12 23:59:25,335 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-12 23:59:25,335 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-12 23:59:25,335 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-12 23:59:25,335 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-12 23:59:25,336 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-12 23:59:25,336 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-12 23:59:25,336 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2021-10-12 23:59:25,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-12 23:59:25,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-12 23:59:25,336 INFO L130 BoogieDeclarations]: Found specification of procedure _destroy_in_nondeterministic_order [2021-10-12 23:59:25,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-12 23:59:25,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-12 23:59:25,337 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-12 23:59:25,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-12 23:59:25,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-12 23:59:25,912 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-12 23:59:25,938 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-12 23:59:25,938 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-10-12 23:59:25,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:25 BoogieIcfgContainer [2021-10-12 23:59:25,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-12 23:59:25,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-12 23:59:25,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-12 23:59:25,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-12 23:59:25,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 11:59:24" (1/3) ... [2021-10-12 23:59:25,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e270d76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:59:25, skipping insertion in model container [2021-10-12 23:59:25,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:25" (2/3) ... [2021-10-12 23:59:25,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e270d76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:59:25, skipping insertion in model container [2021-10-12 23:59:25,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:25" (3/3) ... [2021-10-12 23:59:25,949 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_nondet_free_order-1.i [2021-10-12 23:59:25,954 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-12 23:59:25,955 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2021-10-12 23:59:25,999 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-12 23:59:26,005 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, mConcurrency=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 [2021-10-12 23:59:26,006 INFO L340 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2021-10-12 23:59:26,024 INFO L276 IsEmpty]: Start isEmpty. Operand has 152 states, 79 states have (on average 1.8987341772151898) internal successors, (150), 142 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-12 23:59:26,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-12 23:59:26,032 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:26,032 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:26,033 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting dll_circular_createErr0REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-12 23:59:26,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:26,038 INFO L82 PathProgramCache]: Analyzing trace with hash -23350716, now seen corresponding path program 1 times [2021-10-12 23:59:26,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:26,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555218987] [2021-10-12 23:59:26,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:26,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:26,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:26,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-12 23:59:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:26,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:26,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555218987] [2021-10-12 23:59:26,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555218987] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:26,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:26,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-12 23:59:26,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114512432] [2021-10-12 23:59:26,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:26,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:26,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:26,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:26,269 INFO L87 Difference]: Start difference. First operand has 152 states, 79 states have (on average 1.8987341772151898) internal successors, (150), 142 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-12 23:59:26,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:26,655 INFO L93 Difference]: Finished difference Result 149 states and 156 transitions. [2021-10-12 23:59:26,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:26,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-12 23:59:26,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:26,670 INFO L225 Difference]: With dead ends: 149 [2021-10-12 23:59:26,671 INFO L226 Difference]: Without dead ends: 142 [2021-10-12 23:59:26,673 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:26,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-12 23:59:26,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-10-12 23:59:26,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 76 states have (on average 1.8421052631578947) internal successors, (140), 134 states have internal predecessors, (140), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-12 23:59:26,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 147 transitions. [2021-10-12 23:59:26,748 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 147 transitions. Word has length 10 [2021-10-12 23:59:26,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:26,748 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 147 transitions. [2021-10-12 23:59:26,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-12 23:59:26,749 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 147 transitions. [2021-10-12 23:59:26,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-12 23:59:26,750 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:26,750 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:26,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-12 23:59:26,752 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting dll_circular_createErr1REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-12 23:59:26,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:26,755 INFO L82 PathProgramCache]: Analyzing trace with hash -23350715, now seen corresponding path program 1 times [2021-10-12 23:59:26,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:26,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083047579] [2021-10-12 23:59:26,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:26,756 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:26,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-12 23:59:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:26,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:26,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083047579] [2021-10-12 23:59:26,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083047579] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:26,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:26,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-12 23:59:26,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627479275] [2021-10-12 23:59:26,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:26,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:26,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:26,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:26,856 INFO L87 Difference]: Start difference. First operand 142 states and 147 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-12 23:59:27,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:27,089 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2021-10-12 23:59:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:27,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-12 23:59:27,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:27,094 INFO L225 Difference]: With dead ends: 139 [2021-10-12 23:59:27,095 INFO L226 Difference]: Without dead ends: 139 [2021-10-12 23:59:27,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:27,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-12 23:59:27,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-10-12 23:59:27,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 76 states have (on average 1.8026315789473684) internal successors, (137), 131 states have internal predecessors, (137), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-12 23:59:27,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2021-10-12 23:59:27,136 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 10 [2021-10-12 23:59:27,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:27,136 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2021-10-12 23:59:27,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-12 23:59:27,136 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2021-10-12 23:59:27,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-12 23:59:27,137 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:27,137 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:27,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-12 23:59:27,137 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting dll_circular_createErr10REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-12 23:59:27,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:27,138 INFO L82 PathProgramCache]: Analyzing trace with hash 589419475, now seen corresponding path program 1 times [2021-10-12 23:59:27,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:27,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128963089] [2021-10-12 23:59:27,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:27,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:27,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-12 23:59:27,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:27,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:27,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128963089] [2021-10-12 23:59:27,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128963089] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:27,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:27,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-12 23:59:27,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218330689] [2021-10-12 23:59:27,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-12 23:59:27,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:27,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-12 23:59:27,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-12 23:59:27,255 INFO L87 Difference]: Start difference. First operand 139 states and 144 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-12 23:59:27,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:27,577 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2021-10-12 23:59:27,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-12 23:59:27,581 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-12 23:59:27,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:27,583 INFO L225 Difference]: With dead ends: 149 [2021-10-12 23:59:27,583 INFO L226 Difference]: Without dead ends: 149 [2021-10-12 23:59:27,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-12 23:59:27,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-12 23:59:27,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2021-10-12 23:59:27,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 82 states have (on average 1.8048780487804879) internal successors, (148), 137 states have internal predecessors, (148), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-12 23:59:27,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2021-10-12 23:59:27,607 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 15 [2021-10-12 23:59:27,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:27,608 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2021-10-12 23:59:27,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-12 23:59:27,608 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2021-10-12 23:59:27,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-12 23:59:27,608 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:27,609 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:27,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-12 23:59:27,609 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting dll_circular_createErr11REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-12 23:59:27,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:27,610 INFO L82 PathProgramCache]: Analyzing trace with hash 589419476, now seen corresponding path program 1 times [2021-10-12 23:59:27,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:27,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866565624] [2021-10-12 23:59:27,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:27,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:27,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:27,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-12 23:59:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:27,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:27,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866565624] [2021-10-12 23:59:27,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866565624] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:27,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:27,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-12 23:59:27,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389488343] [2021-10-12 23:59:27,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-12 23:59:27,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:27,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-12 23:59:27,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-12 23:59:27,700 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-12 23:59:27,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:27,927 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2021-10-12 23:59:27,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-12 23:59:27,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-12 23:59:27,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:27,929 INFO L225 Difference]: With dead ends: 147 [2021-10-12 23:59:27,929 INFO L226 Difference]: Without dead ends: 147 [2021-10-12 23:59:27,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-12 23:59:27,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-12 23:59:27,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2021-10-12 23:59:27,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 80 states have (on average 1.8) internal successors, (144), 135 states have internal predecessors, (144), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-12 23:59:27,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 151 transitions. [2021-10-12 23:59:27,934 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 151 transitions. Word has length 15 [2021-10-12 23:59:27,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:27,935 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 151 transitions. [2021-10-12 23:59:27,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-12 23:59:27,935 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 151 transitions. [2021-10-12 23:59:27,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-12 23:59:27,936 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:27,936 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:27,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-12 23:59:27,936 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting dll_circular_createErr4REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-12 23:59:27,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:27,937 INFO L82 PathProgramCache]: Analyzing trace with hash 589421012, now seen corresponding path program 1 times [2021-10-12 23:59:27,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:27,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175274874] [2021-10-12 23:59:27,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:27,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:27,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:27,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-12 23:59:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:27,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:27,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175274874] [2021-10-12 23:59:27,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175274874] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:27,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:27,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-12 23:59:27,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99251197] [2021-10-12 23:59:27,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:27,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:27,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:27,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:27,983 INFO L87 Difference]: Start difference. First operand 143 states and 151 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-12 23:59:28,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:28,167 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2021-10-12 23:59:28,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:28,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-12 23:59:28,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:28,169 INFO L225 Difference]: With dead ends: 142 [2021-10-12 23:59:28,169 INFO L226 Difference]: Without dead ends: 142 [2021-10-12 23:59:28,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:28,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-12 23:59:28,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-10-12 23:59:28,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 80 states have (on average 1.775) internal successors, (142), 134 states have internal predecessors, (142), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-12 23:59:28,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2021-10-12 23:59:28,180 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 15 [2021-10-12 23:59:28,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:28,180 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2021-10-12 23:59:28,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-12 23:59:28,180 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2021-10-12 23:59:28,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-12 23:59:28,181 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:28,181 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:28,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-12 23:59:28,182 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting dll_circular_createErr5REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-12 23:59:28,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:28,182 INFO L82 PathProgramCache]: Analyzing trace with hash 589421013, now seen corresponding path program 1 times [2021-10-12 23:59:28,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:28,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032606752] [2021-10-12 23:59:28,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:28,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:28,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-12 23:59:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:28,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:28,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:28,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032606752] [2021-10-12 23:59:28,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032606752] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:28,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:28,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-12 23:59:28,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511303421] [2021-10-12 23:59:28,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:28,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:28,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:28,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:28,274 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-12 23:59:28,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:28,449 INFO L93 Difference]: Finished difference Result 141 states and 147 transitions. [2021-10-12 23:59:28,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:28,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-12 23:59:28,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:28,453 INFO L225 Difference]: With dead ends: 141 [2021-10-12 23:59:28,454 INFO L226 Difference]: Without dead ends: 141 [2021-10-12 23:59:28,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:28,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-12 23:59:28,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-10-12 23:59:28,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 80 states have (on average 1.75) internal successors, (140), 133 states have internal predecessors, (140), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-12 23:59:28,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 147 transitions. [2021-10-12 23:59:28,458 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 147 transitions. Word has length 15 [2021-10-12 23:59:28,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:28,459 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 147 transitions. [2021-10-12 23:59:28,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-12 23:59:28,459 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 147 transitions. [2021-10-12 23:59:28,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-12 23:59:28,460 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:28,460 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:28,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-12 23:59:28,460 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting dll_circular_createErr7REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-12 23:59:28,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:28,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1092182321, now seen corresponding path program 1 times [2021-10-12 23:59:28,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:28,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25424268] [2021-10-12 23:59:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:28,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:28,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-12 23:59:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:28,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:28,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25424268] [2021-10-12 23:59:28,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25424268] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:28,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:28,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:28,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548889694] [2021-10-12 23:59:28,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-12 23:59:28,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:28,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-12 23:59:28,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:28,536 INFO L87 Difference]: Start difference. First operand 141 states and 147 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-12 23:59:28,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:28,721 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2021-10-12 23:59:28,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-12 23:59:28,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-12 23:59:28,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:28,722 INFO L225 Difference]: With dead ends: 142 [2021-10-12 23:59:28,722 INFO L226 Difference]: Without dead ends: 142 [2021-10-12 23:59:28,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-12 23:59:28,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-12 23:59:28,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2021-10-12 23:59:28,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 80 states have (on average 1.7375) internal successors, (139), 133 states have internal predecessors, (139), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-12 23:59:28,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2021-10-12 23:59:28,727 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 16 [2021-10-12 23:59:28,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:28,727 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2021-10-12 23:59:28,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-12 23:59:28,728 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2021-10-12 23:59:28,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-12 23:59:28,729 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:28,729 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:28,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-12 23:59:28,729 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting dll_circular_createErr10REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-12 23:59:28,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:28,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1717860195, now seen corresponding path program 1 times [2021-10-12 23:59:28,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:28,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768539316] [2021-10-12 23:59:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:28,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:28,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-12 23:59:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:28,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:28,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768539316] [2021-10-12 23:59:28,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768539316] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:28,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:28,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:28,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422013721] [2021-10-12 23:59:28,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-12 23:59:28,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:28,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-12 23:59:28,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:28,774 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-12 23:59:28,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:28,969 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2021-10-12 23:59:28,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-12 23:59:28,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-12 23:59:28,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:28,972 INFO L225 Difference]: With dead ends: 139 [2021-10-12 23:59:28,972 INFO L226 Difference]: Without dead ends: 139 [2021-10-12 23:59:28,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-12 23:59:28,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-12 23:59:28,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-10-12 23:59:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 80 states have (on average 1.7125) internal successors, (137), 131 states have internal predecessors, (137), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-12 23:59:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2021-10-12 23:59:28,977 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 20 [2021-10-12 23:59:28,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:28,977 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2021-10-12 23:59:28,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-12 23:59:28,977 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2021-10-12 23:59:28,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-12 23:59:28,978 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:28,978 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:28,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-12 23:59:28,979 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting dll_circular_createErr11REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-12 23:59:28,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:28,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1717860196, now seen corresponding path program 1 times [2021-10-12 23:59:28,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:28,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833139758] [2021-10-12 23:59:28,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:28,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:29,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-12 23:59:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:29,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:29,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833139758] [2021-10-12 23:59:29,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833139758] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:29,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753052442] [2021-10-12 23:59:29,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:29,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:29,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:29,086 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:29,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-12 23:59:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:29,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-12 23:59:29,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:29,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:29,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753052442] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:29,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:29,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-10-12 23:59:29,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264810895] [2021-10-12 23:59:29,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-12 23:59:29,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:29,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-12 23:59:29,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-12 23:59:29,296 INFO L87 Difference]: Start difference. First operand 139 states and 144 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-12 23:59:29,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:29,558 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2021-10-12 23:59:29,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-12 23:59:29,559 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-12 23:59:29,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:29,560 INFO L225 Difference]: With dead ends: 141 [2021-10-12 23:59:29,560 INFO L226 Difference]: Without dead ends: 141 [2021-10-12 23:59:29,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-12 23:59:29,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-12 23:59:29,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-10-12 23:59:29,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 82 states have (on average 1.6951219512195121) internal successors, (139), 133 states have internal predecessors, (139), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-12 23:59:29,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2021-10-12 23:59:29,565 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 20 [2021-10-12 23:59:29,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:29,565 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2021-10-12 23:59:29,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-12 23:59:29,566 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2021-10-12 23:59:29,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-12 23:59:29,566 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:29,566 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:29,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:29,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:29,789 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting dll_circular_createErr7REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-12 23:59:29,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:29,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1714106273, now seen corresponding path program 1 times [2021-10-12 23:59:29,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:29,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001565862] [2021-10-12 23:59:29,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:29,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:29,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-12 23:59:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:29,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:29,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001565862] [2021-10-12 23:59:29,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001565862] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:29,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143305420] [2021-10-12 23:59:29,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:29,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:29,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:29,876 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:29,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-12 23:59:29,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:29,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-12 23:59:30,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:30,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-12 23:59:30,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-12 23:59:30,207 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-12 23:59:30,208 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 22 treesize of output 24 [2021-10-12 23:59:30,220 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-12 23:59:30,220 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 21 treesize of output 21 [2021-10-12 23:59:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:30,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143305420] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:30,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:30,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-12 23:59:30,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632748226] [2021-10-12 23:59:30,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-12 23:59:30,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:30,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-12 23:59:30,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-12 23:59:30,338 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-12 23:59:30,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:30,600 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2021-10-12 23:59:30,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-12 23:59:30,600 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-12 23:59:30,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:30,602 INFO L225 Difference]: With dead ends: 139 [2021-10-12 23:59:30,602 INFO L226 Difference]: Without dead ends: 139 [2021-10-12 23:59:30,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-12 23:59:30,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-12 23:59:30,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-10-12 23:59:30,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 82 states have (on average 1.670731707317073) internal successors, (137), 131 states have internal predecessors, (137), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-12 23:59:30,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2021-10-12 23:59:30,608 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 21 [2021-10-12 23:59:30,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:30,608 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2021-10-12 23:59:30,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-12 23:59:30,608 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2021-10-12 23:59:30,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-12 23:59:30,609 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:30,610 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:30,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:30,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:30,821 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting _destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-12 23:59:30,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:30,821 INFO L82 PathProgramCache]: Analyzing trace with hash 964765578, now seen corresponding path program 1 times [2021-10-12 23:59:30,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:30,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270105241] [2021-10-12 23:59:30,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:30,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:30,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-12 23:59:30,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:30,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-12 23:59:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-12 23:59:30,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:30,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270105241] [2021-10-12 23:59:30,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270105241] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:30,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:30,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-12 23:59:30,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6116716] [2021-10-12 23:59:30,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-12 23:59:30,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:30,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-12 23:59:30,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-12 23:59:30,981 INFO L87 Difference]: Start difference. First operand 139 states and 144 transitions. Second operand has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-12 23:59:31,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:31,459 INFO L93 Difference]: Finished difference Result 136 states and 141 transitions. [2021-10-12 23:59:31,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-12 23:59:31,460 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-10-12 23:59:31,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:31,461 INFO L225 Difference]: With dead ends: 136 [2021-10-12 23:59:31,461 INFO L226 Difference]: Without dead ends: 136 [2021-10-12 23:59:31,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-12 23:59:31,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-12 23:59:31,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-10-12 23:59:31,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 82 states have (on average 1.6341463414634145) internal successors, (134), 128 states have internal predecessors, (134), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-12 23:59:31,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 141 transitions. [2021-10-12 23:59:31,466 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 141 transitions. Word has length 32 [2021-10-12 23:59:31,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:31,466 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 141 transitions. [2021-10-12 23:59:31,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-12 23:59:31,466 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 141 transitions. [2021-10-12 23:59:31,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-12 23:59:31,467 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:31,467 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:31,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-12 23:59:31,468 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-12 23:59:31,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:31,469 INFO L82 PathProgramCache]: Analyzing trace with hash 964765579, now seen corresponding path program 1 times [2021-10-12 23:59:31,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:31,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145947606] [2021-10-12 23:59:31,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:31,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:31,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-12 23:59:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:31,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-12 23:59:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-12 23:59:31,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:31,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145947606] [2021-10-12 23:59:31,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145947606] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:31,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:31,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-12 23:59:31,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700104404] [2021-10-12 23:59:31,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-12 23:59:31,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:31,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-12 23:59:31,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-12 23:59:31,648 INFO L87 Difference]: Start difference. First operand 136 states and 141 transitions. Second operand has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-12 23:59:32,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:32,136 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2021-10-12 23:59:32,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-12 23:59:32,137 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-10-12 23:59:32,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:32,138 INFO L225 Difference]: With dead ends: 129 [2021-10-12 23:59:32,138 INFO L226 Difference]: Without dead ends: 129 [2021-10-12 23:59:32,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-10-12 23:59:32,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-12 23:59:32,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-10-12 23:59:32,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 82 states have (on average 1.548780487804878) internal successors, (127), 121 states have internal predecessors, (127), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-12 23:59:32,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 134 transitions. [2021-10-12 23:59:32,142 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 134 transitions. Word has length 32 [2021-10-12 23:59:32,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:32,143 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 134 transitions. [2021-10-12 23:59:32,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-12 23:59:32,143 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 134 transitions. [2021-10-12 23:59:32,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-12 23:59:32,144 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:32,145 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:32,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-12 23:59:32,145 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting _destroy_in_nondeterministic_orderErr19ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-12 23:59:32,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:32,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1105471948, now seen corresponding path program 1 times [2021-10-12 23:59:32,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:32,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669775692] [2021-10-12 23:59:32,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:32,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:32,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-12 23:59:32,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:32,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-12 23:59:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:32,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:32,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:32,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669775692] [2021-10-12 23:59:32,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669775692] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:32,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843149025] [2021-10-12 23:59:32,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:32,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:32,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:32,597 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:32,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-12 23:59:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:32,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-12 23:59:32,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:32,784 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 [2021-10-12 23:59:32,864 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-12 23:59:32,864 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 [2021-10-12 23:59:33,027 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-12 23:59:33,028 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 16 treesize of output 18 [2021-10-12 23:59:33,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-12 23:59:33,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-12 23:59:33,383 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-12 23:59:33,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 42 [2021-10-12 23:59:33,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-12 23:59:33,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-12 23:59:33,498 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-12 23:59:33,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 48 [2021-10-12 23:59:34,237 INFO L354 Elim1Store]: treesize reduction 78, result has 3.7 percent of original size [2021-10-12 23:59:34,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 35 [2021-10-12 23:59:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:34,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843149025] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:34,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:34,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 34 [2021-10-12 23:59:34,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047710920] [2021-10-12 23:59:34,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-12 23:59:34,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:34,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-12 23:59:34,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1098, Unknown=0, NotChecked=0, Total=1190 [2021-10-12 23:59:34,263 INFO L87 Difference]: Start difference. First operand 129 states and 134 transitions. Second operand has 35 states, 32 states have (on average 1.8125) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-12 23:59:36,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:36,215 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2021-10-12 23:59:36,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-12 23:59:36,216 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.8125) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2021-10-12 23:59:36,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:36,217 INFO L225 Difference]: With dead ends: 126 [2021-10-12 23:59:36,217 INFO L226 Difference]: Without dead ends: 126 [2021-10-12 23:59:36,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1869.5ms TimeCoverageRelationStatistics Valid=333, Invalid=2423, Unknown=0, NotChecked=0, Total=2756 [2021-10-12 23:59:36,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-12 23:59:36,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2021-10-12 23:59:36,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 82 states have (on average 1.4878048780487805) internal successors, (122), 116 states have internal predecessors, (122), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-12 23:59:36,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 129 transitions. [2021-10-12 23:59:36,222 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 129 transitions. Word has length 38 [2021-10-12 23:59:36,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:36,223 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 129 transitions. [2021-10-12 23:59:36,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.8125) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-12 23:59:36,223 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 129 transitions. [2021-10-12 23:59:36,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-12 23:59:36,224 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:36,224 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:36,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:36,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-12 23:59:36,433 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting _destroy_in_nondeterministic_orderErr34ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-12 23:59:36,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:36,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1105470732, now seen corresponding path program 1 times [2021-10-12 23:59:36,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:36,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777854235] [2021-10-12 23:59:36,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:36,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:36,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-12 23:59:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:36,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-12 23:59:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-12 23:59:36,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:36,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777854235] [2021-10-12 23:59:36,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777854235] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:36,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:36,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-12 23:59:36,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257993952] [2021-10-12 23:59:36,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-12 23:59:36,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:36,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-12 23:59:36,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-10-12 23:59:36,742 INFO L87 Difference]: Start difference. First operand 124 states and 129 transitions. Second operand has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-12 23:59:37,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:37,342 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2021-10-12 23:59:37,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-12 23:59:37,343 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2021-10-12 23:59:37,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:37,344 INFO L225 Difference]: With dead ends: 119 [2021-10-12 23:59:37,344 INFO L226 Difference]: Without dead ends: 119 [2021-10-12 23:59:37,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 292.4ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-10-12 23:59:37,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-12 23:59:37,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-10-12 23:59:37,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 82 states have (on average 1.4268292682926829) internal successors, (117), 111 states have internal predecessors, (117), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-12 23:59:37,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 124 transitions. [2021-10-12 23:59:37,348 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 124 transitions. Word has length 38 [2021-10-12 23:59:37,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:37,349 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 124 transitions. [2021-10-12 23:59:37,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-12 23:59:37,349 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 124 transitions. [2021-10-12 23:59:37,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-12 23:59:37,350 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:37,350 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:37,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-12 23:59:37,350 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting _destroy_in_nondeterministic_orderErr5ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-12 23:59:37,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:37,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1105509714, now seen corresponding path program 1 times [2021-10-12 23:59:37,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:37,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638758168] [2021-10-12 23:59:37,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:37,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:37,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-12 23:59:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:37,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-12 23:59:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-12 23:59:37,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:37,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638758168] [2021-10-12 23:59:37,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638758168] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:37,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:37,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-12 23:59:37,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909918708] [2021-10-12 23:59:37,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-12 23:59:37,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:37,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-12 23:59:37,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-12 23:59:37,532 INFO L87 Difference]: Start difference. First operand 119 states and 124 transitions. Second operand has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-12 23:59:37,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:37,995 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2021-10-12 23:59:37,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-12 23:59:37,996 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2021-10-12 23:59:37,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:37,997 INFO L225 Difference]: With dead ends: 114 [2021-10-12 23:59:37,997 INFO L226 Difference]: Without dead ends: 114 [2021-10-12 23:59:37,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-10-12 23:59:37,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-12 23:59:38,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-10-12 23:59:38,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 82 states have (on average 1.3658536585365855) internal successors, (112), 106 states have internal predecessors, (112), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-12 23:59:38,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2021-10-12 23:59:38,001 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 38 [2021-10-12 23:59:38,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:38,001 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2021-10-12 23:59:38,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-12 23:59:38,001 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2021-10-12 23:59:38,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-12 23:59:38,002 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:38,002 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:38,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-12 23:59:38,003 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting _destroy_in_nondeterministic_orderErr20ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-12 23:59:38,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:38,003 INFO L82 PathProgramCache]: Analyzing trace with hash 90108066, now seen corresponding path program 1 times [2021-10-12 23:59:38,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:38,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279922922] [2021-10-12 23:59:38,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:38,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:38,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-12 23:59:38,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:38,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-12 23:59:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:38,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:38,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279922922] [2021-10-12 23:59:38,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279922922] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:38,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356294131] [2021-10-12 23:59:38,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:38,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:38,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:38,445 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:38,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-12 23:59:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:38,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-12 23:59:38,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:38,681 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 [2021-10-12 23:59:38,768 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-12 23:59:38,769 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 16 treesize of output 18 [2021-10-12 23:59:38,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-12 23:59:38,859 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-12 23:59:38,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-10-12 23:59:39,035 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-12 23:59:39,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 39 [2021-10-12 23:59:39,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-12 23:59:39,141 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-10-12 23:59:39,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 55 [2021-10-12 23:59:39,724 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-12 23:59:39,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 29 [2021-10-12 23:59:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:39,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356294131] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:39,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:39,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 30 [2021-10-12 23:59:39,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720844345] [2021-10-12 23:59:39,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-12 23:59:39,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:39,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-12 23:59:39,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2021-10-12 23:59:39,745 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand has 31 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 25 states have internal predecessors, (51), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-12 23:59:41,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:41,474 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-10-12 23:59:41,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-12 23:59:41,474 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 25 states have internal predecessors, (51), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2021-10-12 23:59:41,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:41,475 INFO L225 Difference]: With dead ends: 113 [2021-10-12 23:59:41,476 INFO L226 Difference]: Without dead ends: 113 [2021-10-12 23:59:41,477 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1531.9ms TimeCoverageRelationStatistics Valid=261, Invalid=2091, Unknown=0, NotChecked=0, Total=2352 [2021-10-12 23:59:41,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-12 23:59:41,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2021-10-12 23:59:41,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 82 states have (on average 1.3048780487804879) internal successors, (107), 101 states have internal predecessors, (107), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-12 23:59:41,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2021-10-12 23:59:41,480 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 39 [2021-10-12 23:59:41,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:41,481 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2021-10-12 23:59:41,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 25 states have internal predecessors, (51), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-12 23:59:41,481 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2021-10-12 23:59:41,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-12 23:59:41,482 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:41,482 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:41,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:41,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-12 23:59:41,697 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting _destroy_in_nondeterministic_orderErr35ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-12 23:59:41,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:41,697 INFO L82 PathProgramCache]: Analyzing trace with hash 90145800, now seen corresponding path program 1 times [2021-10-12 23:59:41,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:41,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554333582] [2021-10-12 23:59:41,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:41,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:41,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-12 23:59:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:41,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-12 23:59:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-12 23:59:41,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:41,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554333582] [2021-10-12 23:59:41,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554333582] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:41,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:41,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-12 23:59:41,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928594060] [2021-10-12 23:59:41,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-12 23:59:41,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:41,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-12 23:59:41,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-10-12 23:59:41,982 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-12 23:59:42,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:42,697 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-10-12 23:59:42,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-12 23:59:42,698 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2021-10-12 23:59:42,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:42,699 INFO L225 Difference]: With dead ends: 104 [2021-10-12 23:59:42,699 INFO L226 Difference]: Without dead ends: 104 [2021-10-12 23:59:42,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 313.1ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-10-12 23:59:42,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-12 23:59:42,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-10-12 23:59:42,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 96 states have internal predecessors, (102), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-12 23:59:42,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2021-10-12 23:59:42,703 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 39 [2021-10-12 23:59:42,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:42,704 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2021-10-12 23:59:42,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-12 23:59:42,704 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2021-10-12 23:59:42,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-12 23:59:42,705 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:42,705 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:42,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-12 23:59:42,706 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting _destroy_in_nondeterministic_orderErr21ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-12 23:59:42,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:42,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1501617162, now seen corresponding path program 1 times [2021-10-12 23:59:42,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:42,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627984365] [2021-10-12 23:59:42,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:42,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:42,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-12 23:59:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:42,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-12 23:59:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:43,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:43,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:43,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627984365] [2021-10-12 23:59:43,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627984365] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:43,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012516929] [2021-10-12 23:59:43,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:43,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:43,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:43,071 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:43,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-12 23:59:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:43,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-12 23:59:43,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:43,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-12 23:59:43,410 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-10-12 23:59:43,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-10-12 23:59:43,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-12 23:59:43,563 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-12 23:59:43,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-10-12 23:59:43,755 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-12 23:59:43,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 39 [2021-10-12 23:59:43,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-12 23:59:43,871 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-10-12 23:59:43,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 60 [2021-10-12 23:59:44,530 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-12 23:59:44,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 39 [2021-10-12 23:59:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:44,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012516929] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:44,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:44,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 32 [2021-10-12 23:59:44,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201081587] [2021-10-12 23:59:44,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-12 23:59:44,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:44,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-12 23:59:44,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2021-10-12 23:59:44,797 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 33 states, 30 states have (on average 2.0) internal successors, (60), 27 states have internal predecessors, (60), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-12 23:59:46,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:46,609 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2021-10-12 23:59:46,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-12 23:59:46,609 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.0) internal successors, (60), 27 states have internal predecessors, (60), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2021-10-12 23:59:46,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:46,610 INFO L225 Difference]: With dead ends: 107 [2021-10-12 23:59:46,610 INFO L226 Difference]: Without dead ends: 107 [2021-10-12 23:59:46,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1683.7ms TimeCoverageRelationStatistics Valid=253, Invalid=2003, Unknown=0, NotChecked=0, Total=2256 [2021-10-12 23:59:46,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-12 23:59:46,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2021-10-12 23:59:46,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 95 states have internal predecessors, (101), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-12 23:59:46,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2021-10-12 23:59:46,615 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 40 [2021-10-12 23:59:46,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:46,616 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2021-10-12 23:59:46,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.0) internal successors, (60), 27 states have internal predecessors, (60), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-12 23:59:46,616 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2021-10-12 23:59:46,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-12 23:59:46,617 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:46,617 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:46,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-12 23:59:46,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-12 23:59:46,833 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting _destroy_in_nondeterministic_orderErr36ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-12 23:59:46,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:46,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1500447370, now seen corresponding path program 1 times [2021-10-12 23:59:46,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:46,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306000999] [2021-10-12 23:59:46,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:46,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:46,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-12 23:59:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:46,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-12 23:59:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-12 23:59:47,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:47,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306000999] [2021-10-12 23:59:47,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306000999] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:47,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:47,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-12 23:59:47,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003607774] [2021-10-12 23:59:47,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-12 23:59:47,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:47,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-12 23:59:47,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-10-12 23:59:47,101 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-12 23:59:47,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:47,565 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2021-10-12 23:59:47,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-12 23:59:47,565 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2021-10-12 23:59:47,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:47,566 INFO L225 Difference]: With dead ends: 102 [2021-10-12 23:59:47,566 INFO L226 Difference]: Without dead ends: 102 [2021-10-12 23:59:47,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 281.9ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-10-12 23:59:47,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-12 23:59:47,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-10-12 23:59:47,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 94 states have internal predecessors, (100), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-12 23:59:47,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2021-10-12 23:59:47,569 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 40 [2021-10-12 23:59:47,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:47,570 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2021-10-12 23:59:47,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-12 23:59:47,570 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2021-10-12 23:59:47,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-12 23:59:47,571 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:47,571 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:47,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-12 23:59:47,577 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting _destroy_in_nondeterministic_orderErr15ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-12 23:59:47,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:47,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1505910075, now seen corresponding path program 1 times [2021-10-12 23:59:47,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:47,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922552871] [2021-10-12 23:59:47,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:47,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:47,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-12 23:59:47,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:47,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-12 23:59:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:47,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:47,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922552871] [2021-10-12 23:59:47,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922552871] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:47,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926617437] [2021-10-12 23:59:47,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:47,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:47,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:47,956 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:47,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-12 23:59:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:48,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-12 23:59:48,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:48,273 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-12 23:59:48,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-12 23:59:48,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-12 23:59:48,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-12 23:59:48,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-10-12 23:59:48,810 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-12 23:59:48,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-10-12 23:59:48,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:48,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926617437] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:48,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:48,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 28 [2021-10-12 23:59:48,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564456888] [2021-10-12 23:59:48,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-12 23:59:48,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:48,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-12 23:59:48,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=740, Unknown=0, NotChecked=0, Total=812 [2021-10-12 23:59:48,865 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand has 29 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 23 states have internal predecessors, (55), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-12 23:59:49,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:49,782 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2021-10-12 23:59:49,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-12 23:59:49,795 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 23 states have internal predecessors, (55), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-10-12 23:59:49,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:49,796 INFO L225 Difference]: With dead ends: 101 [2021-10-12 23:59:49,796 INFO L226 Difference]: Without dead ends: 101 [2021-10-12 23:59:49,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 730.6ms TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-10-12 23:59:49,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-12 23:59:49,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-10-12 23:59:49,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 93 states have internal predecessors, (99), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-12 23:59:49,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2021-10-12 23:59:49,800 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 43 [2021-10-12 23:59:49,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:49,801 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2021-10-12 23:59:49,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 23 states have internal predecessors, (55), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-12 23:59:49,801 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2021-10-12 23:59:49,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-12 23:59:49,802 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:49,802 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:49,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-12 23:59:50,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:50,017 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting _destroy_in_nondeterministic_orderErr9ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-12 23:59:50,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:50,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1506341051, now seen corresponding path program 1 times [2021-10-12 23:59:50,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:50,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664165151] [2021-10-12 23:59:50,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:50,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:50,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-12 23:59:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:50,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-12 23:59:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:50,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:50,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:50,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664165151] [2021-10-12 23:59:50,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664165151] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:50,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634851225] [2021-10-12 23:59:50,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:50,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:50,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:50,413 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:50,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-12 23:59:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:50,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-12 23:59:50,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:50,763 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 [2021-10-12 23:59:50,801 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-12 23:59:50,802 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 [2021-10-12 23:59:50,848 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-12 23:59:50,849 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 16 treesize of output 18 [2021-10-12 23:59:50,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-12 23:59:50,924 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-12 23:59:50,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-10-12 23:59:51,077 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-12 23:59:51,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 39 [2021-10-12 23:59:51,196 INFO L354 Elim1Store]: treesize reduction 116, result has 20.5 percent of original size [2021-10-12 23:59:51,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 66 [2021-10-12 23:59:54,133 INFO L354 Elim1Store]: treesize reduction 104, result has 21.8 percent of original size [2021-10-12 23:59:54,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 115 treesize of output 71 [2021-10-12 23:59:54,820 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-12 23:59:54,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-10-12 23:59:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:54,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634851225] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:54,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:54,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 34 [2021-10-12 23:59:54,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307226971] [2021-10-12 23:59:54,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-12 23:59:54,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:54,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-12 23:59:54,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1111, Unknown=0, NotChecked=0, Total=1190 [2021-10-12 23:59:54,900 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand has 35 states, 32 states have (on average 2.125) internal successors, (68), 29 states have internal predecessors, (68), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 00:00:30,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:30,891 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-10-13 00:00:30,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 00:00:30,892 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.125) internal successors, (68), 29 states have internal predecessors, (68), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-10-13 00:00:30,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:30,892 INFO L225 Difference]: With dead ends: 104 [2021-10-13 00:00:30,892 INFO L226 Difference]: Without dead ends: 104 [2021-10-13 00:00:30,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 10035.4ms TimeCoverageRelationStatistics Valid=338, Invalid=2963, Unknown=5, NotChecked=0, Total=3306 [2021-10-13 00:00:30,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-13 00:00:30,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2021-10-13 00:00:30,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 92 states have internal predecessors, (98), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 00:00:30,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2021-10-13 00:00:30,899 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 43 [2021-10-13 00:00:30,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:30,899 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2021-10-13 00:00:30,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.125) internal successors, (68), 29 states have internal predecessors, (68), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 00:00:30,899 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2021-10-13 00:00:30,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-13 00:00:30,900 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:30,900 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:30,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:31,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:31,118 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting _destroy_in_nondeterministic_orderErr30ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-13 00:00:31,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:31,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1240568634, now seen corresponding path program 1 times [2021-10-13 00:00:31,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:31,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292806166] [2021-10-13 00:00:31,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:31,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:31,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:00:31,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:31,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:00:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:31,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:31,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:31,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292806166] [2021-10-13 00:00:31,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292806166] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:31,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788227972] [2021-10-13 00:00:31,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:31,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:31,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:31,738 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:31,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 00:00:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:32,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-13 00:00:32,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:32,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:00:32,122 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 00:00:32,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-13 00:00:32,228 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-13 00:00:32,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-10-13 00:00:32,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:00:32,328 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 00:00:32,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-10-13 00:00:32,518 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-13 00:00:32,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 38 [2021-10-13 00:00:32,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:32,634 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-10-13 00:00:32,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 59 [2021-10-13 00:00:33,426 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-13 00:00:33,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 36 [2021-10-13 00:00:33,485 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 00:00:33,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-10-13 00:00:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:33,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788227972] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:33,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:33,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 39 [2021-10-13 00:00:33,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247628482] [2021-10-13 00:00:33,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-13 00:00:33,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:33,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-13 00:00:33,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 00:00:33,567 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand has 40 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 00:00:35,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:35,892 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2021-10-13 00:00:35,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 00:00:35,893 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-10-13 00:00:35,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:35,894 INFO L225 Difference]: With dead ends: 101 [2021-10-13 00:00:35,894 INFO L226 Difference]: Without dead ends: 101 [2021-10-13 00:00:35,896 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 2257.2ms TimeCoverageRelationStatistics Valid=339, Invalid=3083, Unknown=0, NotChecked=0, Total=3422 [2021-10-13 00:00:35,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-13 00:00:35,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2021-10-13 00:00:35,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 89 states have internal predecessors, (95), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 00:00:35,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2021-10-13 00:00:35,899 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 44 [2021-10-13 00:00:35,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:35,899 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2021-10-13 00:00:35,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 00:00:35,900 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2021-10-13 00:00:35,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-13 00:00:35,900 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:35,900 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:35,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:36,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:36,107 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting _destroy_in_nondeterministic_orderErr24ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-13 00:00:36,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:36,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1240137658, now seen corresponding path program 1 times [2021-10-13 00:00:36,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:36,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111788465] [2021-10-13 00:00:36,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:36,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:36,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:00:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:36,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:00:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:36,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:36,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111788465] [2021-10-13 00:00:36,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111788465] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:36,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102261593] [2021-10-13 00:00:36,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:36,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:36,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:36,493 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:36,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 00:00:37,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:37,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-13 00:00:37,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:37,029 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 [2021-10-13 00:00:37,104 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 00:00:37,104 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 [2021-10-13 00:00:37,188 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-13 00:00:37,188 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 16 treesize of output 18 [2021-10-13 00:00:37,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:00:37,266 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 00:00:37,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-10-13 00:00:37,385 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-13 00:00:37,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 34 [2021-10-13 00:00:37,481 INFO L354 Elim1Store]: treesize reduction 116, result has 20.5 percent of original size [2021-10-13 00:00:37,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 56 [2021-10-13 00:00:39,790 INFO L354 Elim1Store]: treesize reduction 104, result has 21.8 percent of original size [2021-10-13 00:00:39,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 61 [2021-10-13 00:00:40,013 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 00:00:40,013 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 21 treesize of output 27 [2021-10-13 00:00:40,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:40,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102261593] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:40,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:40,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-10-13 00:00:40,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667353078] [2021-10-13 00:00:40,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-13 00:00:40,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:40,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-13 00:00:40,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1454, Unknown=1, NotChecked=0, Total=1560 [2021-10-13 00:00:40,236 INFO L87 Difference]: Start difference. First operand 97 states and 102 transitions. Second operand has 40 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 34 states have internal predecessors, (71), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 00:01:07,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:07,475 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2021-10-13 00:01:07,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 00:01:07,475 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 34 states have internal predecessors, (71), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-10-13 00:01:07,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:07,476 INFO L225 Difference]: With dead ends: 100 [2021-10-13 00:01:07,476 INFO L226 Difference]: Without dead ends: 100 [2021-10-13 00:01:07,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 15754.7ms TimeCoverageRelationStatistics Valid=399, Invalid=3625, Unknown=8, NotChecked=0, Total=4032 [2021-10-13 00:01:07,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-13 00:01:07,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2021-10-13 00:01:07,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 82 states have (on average 1.146341463414634) internal successors, (94), 88 states have internal predecessors, (94), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 00:01:07,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2021-10-13 00:01:07,480 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 44 [2021-10-13 00:01:07,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:07,481 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2021-10-13 00:01:07,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 34 states have internal predecessors, (71), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 00:01:07,481 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2021-10-13 00:01:07,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-13 00:01:07,481 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:07,482 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:07,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-10-13 00:01:07,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:01:07,682 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting _destroy_in_nondeterministic_orderErr45ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-13 00:01:07,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:07,683 INFO L82 PathProgramCache]: Analyzing trace with hash -762542534, now seen corresponding path program 1 times [2021-10-13 00:01:07,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:01:07,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842950414] [2021-10-13 00:01:07,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:07,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:01:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:07,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:01:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:07,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:01:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:01:08,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:01:08,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842950414] [2021-10-13 00:01:08,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842950414] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:08,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486759942] [2021-10-13 00:01:08,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:08,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:01:08,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:01:08,324 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:01:08,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 00:01:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:08,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-13 00:01:08,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:01:08,817 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 [2021-10-13 00:01:08,858 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 00:01:08,859 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 [2021-10-13 00:01:08,970 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-13 00:01:08,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-10-13 00:01:09,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:01:09,051 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 00:01:09,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 80 [2021-10-13 00:01:09,238 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-13 00:01:09,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 43 [2021-10-13 00:01:09,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:01:09,327 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-10-13 00:01:09,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 59 [2021-10-13 00:01:10,024 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-13 00:01:10,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 36 [2021-10-13 00:01:10,059 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 00:01:10,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-10-13 00:01:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:01:10,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486759942] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:10,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:01:10,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 38 [2021-10-13 00:01:10,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819829839] [2021-10-13 00:01:10,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-13 00:01:10,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:01:10,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-13 00:01:10,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 00:01:10,135 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 39 states, 36 states have (on average 1.75) internal successors, (63), 33 states have internal predecessors, (63), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 00:01:12,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:12,233 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2021-10-13 00:01:12,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 00:01:12,233 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.75) internal successors, (63), 33 states have internal predecessors, (63), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-10-13 00:01:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:12,234 INFO L225 Difference]: With dead ends: 99 [2021-10-13 00:01:12,234 INFO L226 Difference]: Without dead ends: 99 [2021-10-13 00:01:12,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 2064.2ms TimeCoverageRelationStatistics Valid=325, Invalid=2981, Unknown=0, NotChecked=0, Total=3306 [2021-10-13 00:01:12,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-13 00:01:12,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2021-10-13 00:01:12,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 87 states have internal predecessors, (93), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 00:01:12,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 100 transitions. [2021-10-13 00:01:12,238 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 100 transitions. Word has length 44 [2021-10-13 00:01:12,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:12,238 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 100 transitions. [2021-10-13 00:01:12,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.75) internal successors, (63), 33 states have internal predecessors, (63), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 00:01:12,239 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 100 transitions. [2021-10-13 00:01:12,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-13 00:01:12,239 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:12,239 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:12,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 00:01:12,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:01:12,440 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting _destroy_in_nondeterministic_orderErr39ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-13 00:01:12,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:12,440 INFO L82 PathProgramCache]: Analyzing trace with hash -762973510, now seen corresponding path program 1 times [2021-10-13 00:01:12,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:01:12,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799871954] [2021-10-13 00:01:12,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:12,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:01:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:12,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:01:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:12,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:01:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:01:12,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:01:12,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799871954] [2021-10-13 00:01:12,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799871954] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:12,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667503596] [2021-10-13 00:01:12,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:12,738 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:01:12,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:01:12,739 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:01:12,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 00:01:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:13,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-13 00:01:13,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:01:13,313 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:01:13,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 00:01:13,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 00:01:13,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:01:13,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-13 00:01:13,652 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 00:01:13,653 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 21 treesize of output 27 [2021-10-13 00:01:13,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:01:13,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667503596] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:13,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:01:13,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-10-13 00:01:13,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811504847] [2021-10-13 00:01:13,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-13 00:01:13,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:01:13,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-13 00:01:13,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-10-13 00:01:13,816 INFO L87 Difference]: Start difference. First operand 95 states and 100 transitions. Second operand has 28 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 00:01:14,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:14,683 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-10-13 00:01:14,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 00:01:14,683 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-10-13 00:01:14,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:14,684 INFO L225 Difference]: With dead ends: 94 [2021-10-13 00:01:14,684 INFO L226 Difference]: Without dead ends: 94 [2021-10-13 00:01:14,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 676.2ms TimeCoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 00:01:14,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-13 00:01:14,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-10-13 00:01:14,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 86 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 00:01:14,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2021-10-13 00:01:14,687 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 44 [2021-10-13 00:01:14,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:14,688 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2021-10-13 00:01:14,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 00:01:14,688 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2021-10-13 00:01:14,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-13 00:01:14,689 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:14,689 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:14,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 00:01:14,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-13 00:01:14,917 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting _destroy_in_nondeterministic_orderErr18ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-13 00:01:14,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:14,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1633566043, now seen corresponding path program 1 times [2021-10-13 00:01:14,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:01:14,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346436362] [2021-10-13 00:01:14,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:14,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:01:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:15,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:01:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:15,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:01:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:01:15,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:01:15,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346436362] [2021-10-13 00:01:15,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346436362] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:15,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244483956] [2021-10-13 00:01:15,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:15,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:01:15,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:01:15,652 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:01:15,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 00:01:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:16,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-13 00:01:16,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:01:16,204 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 [2021-10-13 00:01:16,235 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 00:01:16,236 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 [2021-10-13 00:01:16,330 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-13 00:01:16,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-10-13 00:01:16,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:01:16,399 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 00:01:16,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 80 [2021-10-13 00:01:16,595 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-13 00:01:16,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 43 [2021-10-13 00:01:16,678 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-13 00:01:16,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 57 [2021-10-13 00:01:17,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:01:17,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:01:17,334 INFO L354 Elim1Store]: treesize reduction 124, result has 16.8 percent of original size [2021-10-13 00:01:17,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 60 [2021-10-13 00:01:17,953 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 00:01:17,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2021-10-13 00:01:18,106 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-13 00:01:18,106 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 25 treesize of output 30 [2021-10-13 00:01:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:01:18,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244483956] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:18,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:01:18,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 43 [2021-10-13 00:01:18,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246225677] [2021-10-13 00:01:18,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-13 00:01:18,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:01:18,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-13 00:01:18,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1779, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 00:01:18,217 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 44 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 38 states have internal predecessors, (72), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 00:01:21,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:21,500 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-10-13 00:01:21,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 00:01:21,501 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 38 states have internal predecessors, (72), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2021-10-13 00:01:21,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:21,502 INFO L225 Difference]: With dead ends: 96 [2021-10-13 00:01:21,502 INFO L226 Difference]: Without dead ends: 96 [2021-10-13 00:01:21,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 3234.8ms TimeCoverageRelationStatistics Valid=375, Invalid=4047, Unknown=0, NotChecked=0, Total=4422 [2021-10-13 00:01:21,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-13 00:01:21,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2021-10-13 00:01:21,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 84 states have internal predecessors, (90), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 00:01:21,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2021-10-13 00:01:21,507 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 46 [2021-10-13 00:01:21,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:21,507 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2021-10-13 00:01:21,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 38 states have internal predecessors, (72), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 00:01:21,508 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2021-10-13 00:01:21,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-13 00:01:21,508 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:21,508 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:21,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 00:01:21,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-13 00:01:21,717 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting _destroy_in_nondeterministic_orderErr33ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-13 00:01:21,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:21,717 INFO L82 PathProgramCache]: Analyzing trace with hash -413294311, now seen corresponding path program 1 times [2021-10-13 00:01:21,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:01:21,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988659187] [2021-10-13 00:01:21,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:21,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:01:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:21,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:01:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:22,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:01:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:01:22,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:01:22,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988659187] [2021-10-13 00:01:22,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988659187] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:22,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296298060] [2021-10-13 00:01:22,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:22,362 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:01:22,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:01:22,363 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:01:22,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 00:01:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:22,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-13 00:01:22,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:01:23,014 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 [2021-10-13 00:01:23,084 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 00:01:23,085 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 [2021-10-13 00:01:23,166 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-13 00:01:23,167 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 16 treesize of output 18 [2021-10-13 00:01:23,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:01:23,260 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 00:01:23,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-10-13 00:01:23,383 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-13 00:01:23,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 34 [2021-10-13 00:01:23,457 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-13 00:01:23,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 48 [2021-10-13 00:01:24,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:01:24,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:01:24,066 INFO L354 Elim1Store]: treesize reduction 124, result has 16.8 percent of original size [2021-10-13 00:01:24,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 57 treesize of output 51 [2021-10-13 00:01:24,435 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 00:01:24,435 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 45 treesize of output 51 [2021-10-13 00:01:24,850 INFO L354 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2021-10-13 00:01:24,850 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 54 treesize of output 71 [2021-10-13 00:01:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:01:25,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296298060] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:25,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:01:25,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 44 [2021-10-13 00:01:25,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669027552] [2021-10-13 00:01:25,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-13 00:01:25,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:01:25,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-13 00:01:25,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1848, Unknown=0, NotChecked=0, Total=1980 [2021-10-13 00:01:25,485 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand has 45 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 39 states have internal predecessors, (77), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 00:01:28,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:28,305 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-10-13 00:01:28,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 00:01:28,305 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 39 states have internal predecessors, (77), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2021-10-13 00:01:28,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:28,306 INFO L225 Difference]: With dead ends: 94 [2021-10-13 00:01:28,306 INFO L226 Difference]: Without dead ends: 94 [2021-10-13 00:01:28,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 3000.8ms TimeCoverageRelationStatistics Valid=442, Invalid=4388, Unknown=0, NotChecked=0, Total=4830 [2021-10-13 00:01:28,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-13 00:01:28,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2021-10-13 00:01:28,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 82 states have internal predecessors, (88), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 00:01:28,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2021-10-13 00:01:28,325 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 47 [2021-10-13 00:01:28,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:28,325 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2021-10-13 00:01:28,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 39 states have internal predecessors, (77), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 00:01:28,325 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2021-10-13 00:01:28,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-13 00:01:28,326 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:28,326 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:28,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 00:01:28,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-13 00:01:28,527 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-13 00:01:28,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:28,527 INFO L82 PathProgramCache]: Analyzing trace with hash 491836438, now seen corresponding path program 1 times [2021-10-13 00:01:28,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:01:28,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654728434] [2021-10-13 00:01:28,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:28,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:01:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:28,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:01:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:28,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:01:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:29,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-13 00:01:29,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:01:29,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:01:29,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654728434] [2021-10-13 00:01:29,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654728434] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:29,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634689660] [2021-10-13 00:01:29,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:29,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:01:29,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:01:29,731 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:01:29,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 00:01:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:30,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-13 00:01:30,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:01:30,447 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-10-13 00:01:30,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 26 [2021-10-13 00:01:30,648 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-13 00:01:30,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-10-13 00:01:30,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:01:30,903 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 00:01:30,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 38 [2021-10-13 00:01:31,144 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-13 00:01:31,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 48 [2021-10-13 00:01:31,279 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-13 00:01:31,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 72 [2021-10-13 00:01:31,777 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-13 00:01:31,777 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 94 treesize of output 80 [2021-10-13 00:01:31,782 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-13 00:01:31,782 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 71 treesize of output 59 [2021-10-13 00:01:37,021 INFO L354 Elim1Store]: treesize reduction 348, result has 32.9 percent of original size [2021-10-13 00:01:37,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 174 treesize of output 262 [2021-10-13 00:01:37,058 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-13 00:01:37,058 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 7 case distinctions, treesize of input 232 treesize of output 229 [2021-10-13 00:01:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:01:42,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634689660] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:42,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:01:42,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 50 [2021-10-13 00:01:42,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018928167] [2021-10-13 00:01:42,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-13 00:01:42,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:01:42,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-13 00:01:42,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2411, Unknown=0, NotChecked=0, Total=2550 [2021-10-13 00:01:42,439 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 51 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 46 states have internal predecessors, (83), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 00:01:57,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:57,747 INFO L93 Difference]: Finished difference Result 160 states and 172 transitions. [2021-10-13 00:01:57,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-13 00:01:57,748 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 46 states have internal predecessors, (83), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2021-10-13 00:01:57,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:57,752 INFO L225 Difference]: With dead ends: 160 [2021-10-13 00:01:57,752 INFO L226 Difference]: Without dead ends: 148 [2021-10-13 00:01:57,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2092 ImplicationChecksByTransitivity, 18151.8ms TimeCoverageRelationStatistics Valid=566, Invalid=8363, Unknown=1, NotChecked=0, Total=8930 [2021-10-13 00:01:57,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-13 00:01:57,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 124. [2021-10-13 00:01:57,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 113 states have (on average 1.0884955752212389) internal successors, (123), 114 states have internal predecessors, (123), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-13 00:01:57,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2021-10-13 00:01:57,766 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 50 [2021-10-13 00:01:57,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:57,766 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2021-10-13 00:01:57,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 46 states have internal predecessors, (83), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 00:01:57,767 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2021-10-13 00:01:57,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-13 00:01:57,769 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:57,769 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:57,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-13 00:01:57,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:01:57,993 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-13 00:01:57,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:57,993 INFO L82 PathProgramCache]: Analyzing trace with hash -713295800, now seen corresponding path program 1 times [2021-10-13 00:01:57,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:01:57,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932417765] [2021-10-13 00:01:57,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:57,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:01:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:58,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:01:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:58,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:01:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:58,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-13 00:01:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:59,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:01:59,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:01:59,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932417765] [2021-10-13 00:01:59,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932417765] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:59,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633134395] [2021-10-13 00:01:59,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:59,301 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:01:59,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:01:59,302 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:01:59,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 00:02:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:02:00,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-13 00:02:00,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:02:00,116 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-10-13 00:02:00,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 26 [2021-10-13 00:02:00,287 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-13 00:02:00,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-10-13 00:02:00,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:02:00,515 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 00:02:00,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 38 [2021-10-13 00:02:00,776 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-13 00:02:00,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 48 [2021-10-13 00:02:00,926 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-13 00:02:00,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 72 [2021-10-13 00:02:01,409 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-13 00:02:01,410 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 94 treesize of output 80 [2021-10-13 00:02:01,414 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-13 00:02:01,415 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 71 treesize of output 59 [2021-10-13 00:02:06,240 INFO L354 Elim1Store]: treesize reduction 350, result has 32.6 percent of original size [2021-10-13 00:02:06,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 174 treesize of output 260 [2021-10-13 00:02:06,288 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-13 00:02:06,288 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 7 case distinctions, treesize of input 230 treesize of output 227 [2021-10-13 00:02:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:02:07,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633134395] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:02:07,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:02:07,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 50 [2021-10-13 00:02:07,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172629442] [2021-10-13 00:02:07,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-13 00:02:07,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:02:07,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-13 00:02:07,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2414, Unknown=0, NotChecked=0, Total=2550 [2021-10-13 00:02:07,116 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand has 51 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 46 states have internal predecessors, (83), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 00:02:26,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:02:26,595 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2021-10-13 00:02:26,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-13 00:02:26,595 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 46 states have internal predecessors, (83), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2021-10-13 00:02:26,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:02:26,596 INFO L225 Difference]: With dead ends: 159 [2021-10-13 00:02:26,597 INFO L226 Difference]: Without dead ends: 143 [2021-10-13 00:02:26,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2113 ImplicationChecksByTransitivity, 21890.6ms TimeCoverageRelationStatistics Valid=575, Invalid=8736, Unknown=1, NotChecked=0, Total=9312 [2021-10-13 00:02:26,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-13 00:02:26,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 120. [2021-10-13 00:02:26,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 109 states have (on average 1.0825688073394495) internal successors, (118), 110 states have internal predecessors, (118), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-13 00:02:26,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2021-10-13 00:02:26,603 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 50 [2021-10-13 00:02:26,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:02:26,603 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2021-10-13 00:02:26,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 46 states have internal predecessors, (83), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 00:02:26,604 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2021-10-13 00:02:26,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-13 00:02:26,605 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:02:26,605 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:02:26,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-13 00:02:26,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-13 00:02:26,813 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-13 00:02:26,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:02:26,813 INFO L82 PathProgramCache]: Analyzing trace with hash -816818038, now seen corresponding path program 1 times [2021-10-13 00:02:26,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:02:26,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685139464] [2021-10-13 00:02:26,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:02:26,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:02:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:02:26,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:02:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:02:26,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:02:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:02:27,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-13 00:02:27,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:02:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:02:28,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:02:28,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685139464] [2021-10-13 00:02:28,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685139464] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:02:28,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85618069] [2021-10-13 00:02:28,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:02:28,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:02:28,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:02:28,557 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:02:28,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 00:02:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:02:29,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-13 00:02:29,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:02:29,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:02:29,945 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 00:02:29,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 51 [2021-10-13 00:02:30,180 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-13 00:02:30,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 61 [2021-10-13 00:02:30,303 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-13 00:02:30,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 84 treesize of output 80 [2021-10-13 00:02:30,776 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-13 00:02:30,777 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 84 treesize of output 70 [2021-10-13 00:02:34,004 INFO L354 Elim1Store]: treesize reduction 348, result has 32.9 percent of original size [2021-10-13 00:02:34,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 227 treesize of output 287 [2021-10-13 00:02:35,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:02:35,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85618069] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:02:35,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:02:35,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-10-13 00:02:35,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999979371] [2021-10-13 00:02:35,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-10-13 00:02:35,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:02:35,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-10-13 00:02:35,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2709, Unknown=0, NotChecked=0, Total=2862 [2021-10-13 00:02:35,689 INFO L87 Difference]: Start difference. First operand 120 states and 129 transitions. Second operand has 54 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 49 states have internal predecessors, (86), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 00:02:47,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:02:47,366 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2021-10-13 00:02:47,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-13 00:02:47,368 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 49 states have internal predecessors, (86), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 51 [2021-10-13 00:02:47,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:02:47,370 INFO L225 Difference]: With dead ends: 156 [2021-10-13 00:02:47,370 INFO L226 Difference]: Without dead ends: 146 [2021-10-13 00:02:47,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1566 ImplicationChecksByTransitivity, 12465.2ms TimeCoverageRelationStatistics Valid=414, Invalid=6558, Unknown=0, NotChecked=0, Total=6972 [2021-10-13 00:02:47,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-13 00:02:47,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2021-10-13 00:02:47,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 126 states have (on average 1.0793650793650793) internal successors, (136), 128 states have internal predecessors, (136), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-10-13 00:02:47,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 152 transitions. [2021-10-13 00:02:47,378 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 152 transitions. Word has length 51 [2021-10-13 00:02:47,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:02:47,378 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 152 transitions. [2021-10-13 00:02:47,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 49 states have internal predecessors, (86), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 00:02:47,378 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 152 transitions. [2021-10-13 00:02:47,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-13 00:02:47,379 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:02:47,379 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:02:47,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-10-13 00:02:47,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:02:47,605 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-13 00:02:47,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:02:47,605 INFO L82 PathProgramCache]: Analyzing trace with hash -2021950276, now seen corresponding path program 1 times [2021-10-13 00:02:47,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:02:47,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064914957] [2021-10-13 00:02:47,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:02:47,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:02:47,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:02:47,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:02:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:02:47,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:02:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:02:48,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-13 00:02:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:02:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:02:49,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:02:49,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064914957] [2021-10-13 00:02:49,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064914957] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:02:49,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122101681] [2021-10-13 00:02:49,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:02:49,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:02:49,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:02:49,333 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:02:49,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-13 00:02:50,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:02:50,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-13 00:02:50,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:02:50,492 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-10-13 00:02:50,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 26 [2021-10-13 00:02:50,713 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-13 00:02:50,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-10-13 00:02:50,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:02:50,912 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 00:02:50,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 38 [2021-10-13 00:02:51,170 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-13 00:02:51,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 48 [2021-10-13 00:02:51,296 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-13 00:02:51,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 72 [2021-10-13 00:02:51,769 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-13 00:02:51,769 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 94 treesize of output 80 [2021-10-13 00:02:51,778 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-13 00:02:51,778 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 71 treesize of output 59 [2021-10-13 00:02:57,252 INFO L354 Elim1Store]: treesize reduction 348, result has 32.9 percent of original size [2021-10-13 00:02:57,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 174 treesize of output 262 [2021-10-13 00:02:57,288 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-13 00:02:57,288 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 7 case distinctions, treesize of input 232 treesize of output 229 [2021-10-13 00:03:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:03:00,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122101681] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:03:00,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:03:00,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 51 [2021-10-13 00:03:00,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844353499] [2021-10-13 00:03:00,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-13 00:03:00,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:03:00,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-13 00:03:00,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2518, Unknown=0, NotChecked=0, Total=2652 [2021-10-13 00:03:00,156 INFO L87 Difference]: Start difference. First operand 140 states and 152 transitions. Second operand has 52 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 47 states have internal predecessors, (84), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 00:03:25,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:03:25,038 INFO L93 Difference]: Finished difference Result 172 states and 185 transitions. [2021-10-13 00:03:25,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-13 00:03:25,038 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 47 states have internal predecessors, (84), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 51 [2021-10-13 00:03:25,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:03:25,040 INFO L225 Difference]: With dead ends: 172 [2021-10-13 00:03:25,040 INFO L226 Difference]: Without dead ends: 156 [2021-10-13 00:03:25,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 27689.4ms TimeCoverageRelationStatistics Valid=562, Invalid=9140, Unknown=0, NotChecked=0, Total=9702 [2021-10-13 00:03:25,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-13 00:03:25,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 141. [2021-10-13 00:03:25,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 127 states have (on average 1.078740157480315) internal successors, (137), 129 states have internal predecessors, (137), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-10-13 00:03:25,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 153 transitions. [2021-10-13 00:03:25,046 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 153 transitions. Word has length 51 [2021-10-13 00:03:25,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:03:25,047 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 153 transitions. [2021-10-13 00:03:25,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 47 states have internal predecessors, (84), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 00:03:25,047 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 153 transitions. [2021-10-13 00:03:25,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-13 00:03:25,048 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:03:25,048 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:03:25,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-10-13 00:03:25,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:03:25,256 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-13 00:03:25,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:03:25,256 INFO L82 PathProgramCache]: Analyzing trace with hash 539653616, now seen corresponding path program 1 times [2021-10-13 00:03:25,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:03:25,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804435434] [2021-10-13 00:03:25,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:03:25,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:03:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:03:25,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:03:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:03:25,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:03:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:03:26,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-13 00:03:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:03:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:03:26,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:03:26,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804435434] [2021-10-13 00:03:26,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804435434] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:03:26,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638701293] [2021-10-13 00:03:26,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:03:26,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:03:26,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:03:26,832 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:03:26,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 00:03:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:03:27,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-13 00:03:27,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:03:27,974 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-10-13 00:03:27,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 26 [2021-10-13 00:03:28,205 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-13 00:03:28,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-10-13 00:03:28,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:03:28,440 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 00:03:28,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 38 [2021-10-13 00:03:28,705 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-13 00:03:28,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 48 [2021-10-13 00:03:28,833 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-13 00:03:28,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 72 [2021-10-13 00:03:29,327 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-13 00:03:29,327 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 94 treesize of output 80 [2021-10-13 00:03:29,340 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-13 00:03:29,340 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 71 treesize of output 59 [2021-10-13 00:03:33,214 INFO L354 Elim1Store]: treesize reduction 350, result has 32.6 percent of original size [2021-10-13 00:03:33,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 174 treesize of output 260 [2021-10-13 00:03:33,259 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-13 00:03:33,259 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 7 case distinctions, treesize of input 230 treesize of output 227 [2021-10-13 00:04:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:04:12,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638701293] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:04:12,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:04:12,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 51 [2021-10-13 00:04:12,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719620866] [2021-10-13 00:04:12,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-13 00:04:12,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:04:12,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-13 00:04:12,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2518, Unknown=0, NotChecked=0, Total=2652 [2021-10-13 00:04:12,952 INFO L87 Difference]: Start difference. First operand 141 states and 153 transitions. Second operand has 52 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 47 states have internal predecessors, (84), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 00:04:30,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:04:30,298 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2021-10-13 00:04:30,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-13 00:04:30,299 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 47 states have internal predecessors, (84), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 51 [2021-10-13 00:04:30,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:04:30,301 INFO L225 Difference]: With dead ends: 169 [2021-10-13 00:04:30,301 INFO L226 Difference]: Without dead ends: 157 [2021-10-13 00:04:30,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 19505.0ms TimeCoverageRelationStatistics Valid=564, Invalid=9138, Unknown=0, NotChecked=0, Total=9702 [2021-10-13 00:04:30,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-10-13 00:04:30,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 145. [2021-10-13 00:04:30,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 131 states have (on average 1.0763358778625953) internal successors, (141), 133 states have internal predecessors, (141), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-10-13 00:04:30,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions. [2021-10-13 00:04:30,309 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 51 [2021-10-13 00:04:30,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:04:30,309 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions. [2021-10-13 00:04:30,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 47 states have internal predecessors, (84), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 00:04:30,310 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions. [2021-10-13 00:04:30,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-13 00:04:30,310 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:04:30,311 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:04:30,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-13 00:04:30,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-13 00:04:30,529 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-13 00:04:30,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:04:30,529 INFO L82 PathProgramCache]: Analyzing trace with hash -665478622, now seen corresponding path program 1 times [2021-10-13 00:04:30,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:04:30,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575614830] [2021-10-13 00:04:30,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:04:30,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:04:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:04:30,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:04:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:04:30,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:04:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:04:31,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-13 00:04:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:04:32,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:04:32,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:04:32,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575614830] [2021-10-13 00:04:32,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575614830] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:04:32,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056128045] [2021-10-13 00:04:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:04:32,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:04:32,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:04:32,221 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:04:32,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-13 00:04:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:04:33,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-13 00:04:33,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:04:33,565 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-10-13 00:04:33,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 26 [2021-10-13 00:04:33,775 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-13 00:04:33,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-10-13 00:04:33,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:04:33,987 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 00:04:33,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 38 [2021-10-13 00:04:34,247 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-13 00:04:34,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 48 [2021-10-13 00:04:34,386 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-13 00:04:34,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 72 [2021-10-13 00:04:34,893 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-13 00:04:34,894 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 94 treesize of output 82 [2021-10-13 00:04:34,898 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-13 00:04:34,898 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 76 treesize of output 62 [2021-10-13 00:04:40,271 INFO L354 Elim1Store]: treesize reduction 348, result has 32.9 percent of original size [2021-10-13 00:04:40,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 174 treesize of output 262 [2021-10-13 00:04:40,303 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-13 00:04:40,304 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 7 case distinctions, treesize of input 232 treesize of output 229 [2021-10-13 00:04:45,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:04:45,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056128045] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:04:45,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:04:45,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 50 [2021-10-13 00:04:45,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274175146] [2021-10-13 00:04:45,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-13 00:04:45,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:04:45,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-13 00:04:45,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2419, Unknown=0, NotChecked=0, Total=2550 [2021-10-13 00:04:45,385 INFO L87 Difference]: Start difference. First operand 145 states and 157 transitions. Second operand has 51 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 46 states have internal predecessors, (85), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 00:04:59,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:04:59,789 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2021-10-13 00:04:59,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-13 00:04:59,789 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 46 states have internal predecessors, (85), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 51 [2021-10-13 00:04:59,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:04:59,791 INFO L225 Difference]: With dead ends: 164 [2021-10-13 00:04:59,791 INFO L226 Difference]: Without dead ends: 134 [2021-10-13 00:04:59,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2094 ImplicationChecksByTransitivity, 17519.2ms TimeCoverageRelationStatistics Valid=562, Invalid=8944, Unknown=0, NotChecked=0, Total=9506 [2021-10-13 00:04:59,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-13 00:04:59,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 125. [2021-10-13 00:04:59,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 114 states have (on average 1.0701754385964912) internal successors, (122), 115 states have internal predecessors, (122), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-13 00:04:59,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 133 transitions. [2021-10-13 00:04:59,797 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 133 transitions. Word has length 51 [2021-10-13 00:04:59,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:04:59,797 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 133 transitions. [2021-10-13 00:04:59,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 46 states have internal predecessors, (85), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 00:04:59,798 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 133 transitions. [2021-10-13 00:04:59,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-13 00:04:59,798 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:04:59,798 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:04:59,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:00,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-13 00:05:00,012 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-13 00:05:00,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:00,012 INFO L82 PathProgramCache]: Analyzing trace with hash 61109274, now seen corresponding path program 2 times [2021-10-13 00:05:00,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:00,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345452075] [2021-10-13 00:05:00,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:00,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:00,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:05:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:00,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:05:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:00,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-10-13 00:05:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:05:00,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:05:00,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345452075] [2021-10-13 00:05:00,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345452075] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:00,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035806243] [2021-10-13 00:05:00,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:05:00,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:05:00,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:00,133 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:05:00,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-13 00:05:01,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:05:01,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:05:01,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 00:05:01,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:05:01,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035806243] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:01,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:05:01,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-10-13 00:05:01,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227315755] [2021-10-13 00:05:01,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 00:05:01,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:05:01,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 00:05:01,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:05:01,803 INFO L87 Difference]: Start difference. First operand 125 states and 133 transitions. Second operand has 11 states, 10 states have (on average 7.8) internal successors, (78), 8 states have internal predecessors, (78), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-13 00:05:01,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:05:01,879 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-10-13 00:05:01,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 00:05:01,879 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.8) internal successors, (78), 8 states have internal predecessors, (78), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 56 [2021-10-13 00:05:01,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:05:01,879 INFO L225 Difference]: With dead ends: 48 [2021-10-13 00:05:01,879 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 00:05:01,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-13 00:05:01,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 00:05:01,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 00:05:01,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:05:01,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 00:05:01,880 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2021-10-13 00:05:01,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:05:01,880 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:05:01,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.8) internal successors, (78), 8 states have internal predecessors, (78), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-13 00:05:01,881 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 00:05:01,881 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 00:05:01,883 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION [2021-10-13 00:05:01,884 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION [2021-10-13 00:05:01,884 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION [2021-10-13 00:05:01,884 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr3REQUIRES_VIOLATION [2021-10-13 00:05:01,884 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,884 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr5ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,884 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,885 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr7ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,885 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,885 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,885 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,885 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr11ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,885 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr12ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,885 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr13ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,885 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr14ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,885 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr15ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,886 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr16ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,886 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr17ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,886 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr18ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,886 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr19ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,886 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr20ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,886 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr21ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,886 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr22ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,886 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr23ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,887 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr24ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,887 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr25ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,887 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr26ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,887 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr27ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,887 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr28ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,888 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr29ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,888 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr30ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,888 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr31ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,888 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr32ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,888 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr33ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,888 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr34ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,888 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr35ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,889 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr36ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,889 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr37ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,889 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr38ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,889 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr39ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,889 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr40ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,889 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr41ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,889 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr42ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,889 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr43ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,889 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr44ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,889 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr45ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,890 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr46ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,890 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr47ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,890 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr48ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:05:01,890 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr0REQUIRES_VIOLATION [2021-10-13 00:05:01,890 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr1REQUIRES_VIOLATION [2021-10-13 00:05:01,890 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr2REQUIRES_VIOLATION [2021-10-13 00:05:01,890 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr3REQUIRES_VIOLATION [2021-10-13 00:05:01,890 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr4REQUIRES_VIOLATION [2021-10-13 00:05:01,890 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr5REQUIRES_VIOLATION [2021-10-13 00:05:01,890 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr6REQUIRES_VIOLATION [2021-10-13 00:05:01,890 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr7REQUIRES_VIOLATION [2021-10-13 00:05:01,890 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr8REQUIRES_VIOLATION [2021-10-13 00:05:01,890 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr9REQUIRES_VIOLATION [2021-10-13 00:05:01,890 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr10REQUIRES_VIOLATION [2021-10-13 00:05:01,891 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr11REQUIRES_VIOLATION [2021-10-13 00:05:01,891 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ENSURES_VIOLATIONMEMORY_LEAK [2021-10-13 00:05:01,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:02,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-13 00:05:02,096 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:05:02,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:05:02 BoogieIcfgContainer [2021-10-13 00:05:02,099 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:05:02,099 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:05:02,099 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:05:02,099 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:05:02,100 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:25" (3/4) ... [2021-10-13 00:05:02,113 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 00:05:02,119 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-13 00:05:02,119 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-10-13 00:05:02,119 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-13 00:05:02,119 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure _destroy_in_nondeterministic_order [2021-10-13 00:05:02,119 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-13 00:05:02,120 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-13 00:05:02,120 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_circular_create [2021-10-13 00:05:02,133 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-13 00:05:02,133 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 00:05:02,133 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 00:05:02,134 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 00:05:02,207 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:05:02,207 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:05:02,208 INFO L168 Benchmark]: Toolchain (without parser) took 337517.04 ms. Allocated memory was 88.1 MB in the beginning and 394.3 MB in the end (delta: 306.2 MB). Free memory was 53.1 MB in the beginning and 59.5 MB in the end (delta: -6.4 MB). Peak memory consumption was 299.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:02,209 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 88.1 MB. Free memory was 58.4 MB in the beginning and 58.4 MB in the end (delta: 29.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:05:02,209 INFO L168 Benchmark]: CACSL2BoogieTranslator took 450.40 ms. Allocated memory is still 88.1 MB. Free memory was 52.9 MB in the beginning and 57.1 MB in the end (delta: -4.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:02,211 INFO L168 Benchmark]: Boogie Preprocessor took 59.82 ms. Allocated memory is still 88.1 MB. Free memory was 57.1 MB in the beginning and 54.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:02,212 INFO L168 Benchmark]: RCFGBuilder took 737.44 ms. Allocated memory was 88.1 MB in the beginning and 127.9 MB in the end (delta: 39.8 MB). Free memory was 54.3 MB in the beginning and 97.9 MB in the end (delta: -43.6 MB). Peak memory consumption was 24.9 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:02,212 INFO L168 Benchmark]: TraceAbstraction took 336156.29 ms. Allocated memory was 127.9 MB in the beginning and 394.3 MB in the end (delta: 266.3 MB). Free memory was 96.7 MB in the beginning and 63.7 MB in the end (delta: 33.0 MB). Peak memory consumption was 298.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:02,213 INFO L168 Benchmark]: Witness Printer took 107.95 ms. Allocated memory is still 394.3 MB. Free memory was 63.7 MB in the beginning and 59.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:02,215 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 88.1 MB. Free memory was 58.4 MB in the beginning and 58.4 MB in the end (delta: 29.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 450.40 ms. Allocated memory is still 88.1 MB. Free memory was 52.9 MB in the beginning and 57.1 MB in the end (delta: -4.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 59.82 ms. Allocated memory is still 88.1 MB. Free memory was 57.1 MB in the beginning and 54.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 737.44 ms. Allocated memory was 88.1 MB in the beginning and 127.9 MB in the end (delta: 39.8 MB). Free memory was 54.3 MB in the beginning and 97.9 MB in the end (delta: -43.6 MB). Peak memory consumption was 24.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 336156.29 ms. Allocated memory was 127.9 MB in the beginning and 394.3 MB in the end (delta: 266.3 MB). Free memory was 96.7 MB in the beginning and 63.7 MB in the end (delta: 33.0 MB). Peak memory consumption was 298.1 MB. Max. memory is 16.1 GB. * Witness Printer took 107.95 ms. Allocated memory is still 394.3 MB. Free memory was 63.7 MB in the beginning and 59.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 586]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 586]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 587]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 587]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 589]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 589]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 589]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 591]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 591]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 591]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 592]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 592]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 592]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 598]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 598]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 598]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 601]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 601]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 601]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 604]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 604]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 604]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 607]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 607]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 607]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 610]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 610]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 610]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 612]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 612]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 612]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 613]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 613]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 613]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 568]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 568]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 569]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 569]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 576]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 576]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 577]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 577]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 581]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 581]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 582]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 582]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 617]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 159 locations, 62 error locations. Started 1 CEGAR loops. OverallTime: 336098.1ms, OverallIterations: 34, TraceHistogramMax: 3, EmptinessCheckTime: 35.7ms, AutomataDifference: 190016.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2671 SDtfs, 5843 SDslu, 18643 SDs, 0 SdLazy, 39545 SolverSat, 1521 SolverUnsat, 78 SolverUnknown, 0 SolverNotchecked, 67132.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2007 GetRequests, 669 SyntacticMatches, 25 SemanticMatches, 1313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17730 ImplicationChecksByTransitivity, 161750.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=152occurred in iteration=0, InterpolantAutomatonStates: 718, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 271.4ms AutomataMinimizationTime, 34 MinimizatonAttempts, 132 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 228.0ms SsaConstructionTime, 1058.7ms SatisfiabilityAnalysisTime, 128897.0ms InterpolantComputationTime, 2081 NumberOfCodeBlocks, 2081 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 2027 ConstructedInterpolants, 353 QuantifiedInterpolants, 49585 SizeOfPredicates, 258 NumberOfNonLiveVariables, 4008 ConjunctsInSsa, 826 ConjunctsInUnsatCore, 54 InterpolantComputations, 14 PerfectInterpolantSequences, 57/327 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 62 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-13 00:05:02,456 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-13 00:05:02,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7399151f-1b84-48dc-a700-806f771a5e2e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...