./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD --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 d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 22:55:55,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 22:55:55,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 22:55:55,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 22:55:55,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 22:55:55,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 22:55:55,824 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 22:55:55,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 22:55:55,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 22:55:55,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 22:55:55,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 22:55:55,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 22:55:55,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 22:55:55,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 22:55:55,853 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 22:55:55,856 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 22:55:55,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 22:55:55,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 22:55:55,867 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 22:55:55,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 22:55:55,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 22:55:55,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 22:55:55,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 22:55:55,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 22:55:55,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 22:55:55,900 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 22:55:55,901 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 22:55:55,903 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 22:55:55,904 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 22:55:55,906 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 22:55:55,906 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 22:55:55,908 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 22:55:55,910 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 22:55:55,912 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 22:55:55,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 22:55:55,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 22:55:55,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 22:55:55,916 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 22:55:55,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 22:55:55,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 22:55:55,918 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 22:55:55,919 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 22:55:55,977 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 22:55:55,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 22:55:55,979 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 22:55:55,979 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 22:55:55,981 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 22:55:55,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 22:55:55,982 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 22:55:55,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 22:55:55,983 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 22:55:55,983 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 22:55:55,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 22:55:55,985 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 22:55:55,985 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 22:55:55,985 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 22:55:55,986 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 22:55:55,986 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 22:55:55,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 22:55:55,986 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 22:55:55,987 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 22:55:55,987 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 22:55:55,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 22:55:55,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 22:55:55,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 22:55:55,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:55:55,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 22:55:55,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 22:55:55,989 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 22:55:55,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 22:55:55,990 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 22:55:55,992 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_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 [2021-10-28 22:55:56,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 22:55:56,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 22:55:56,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 22:55:56,362 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 22:55:56,363 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 22:55:56,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2021-10-28 22:55:56,459 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/data/9255e908b/29acd434fcc049678cca18a5fe4fb679/FLAG3ae7573a5 [2021-10-28 22:55:57,188 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 22:55:57,188 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2021-10-28 22:55:57,215 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/data/9255e908b/29acd434fcc049678cca18a5fe4fb679/FLAG3ae7573a5 [2021-10-28 22:55:57,426 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/data/9255e908b/29acd434fcc049678cca18a5fe4fb679 [2021-10-28 22:55:57,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 22:55:57,435 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 22:55:57,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 22:55:57,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 22:55:57,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 22:55:57,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:55:57" (1/1) ... [2021-10-28 22:55:57,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e9d9095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:57, skipping insertion in model container [2021-10-28 22:55:57,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:55:57" (1/1) ... [2021-10-28 22:55:57,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 22:55:57,532 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 22:55:58,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:55:58,019 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 22:55:58,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:55:58,099 INFO L208 MainTranslator]: Completed translation [2021-10-28 22:55:58,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:58 WrapperNode [2021-10-28 22:55:58,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 22:55:58,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 22:55:58,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 22:55:58,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 22:55:58,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:58" (1/1) ... [2021-10-28 22:55:58,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:58" (1/1) ... [2021-10-28 22:55:58,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:58" (1/1) ... [2021-10-28 22:55:58,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:58" (1/1) ... [2021-10-28 22:55:58,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:58" (1/1) ... [2021-10-28 22:55:58,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:58" (1/1) ... [2021-10-28 22:55:58,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:58" (1/1) ... [2021-10-28 22:55:58,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 22:55:58,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 22:55:58,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 22:55:58,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 22:55:58,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:58" (1/1) ... [2021-10-28 22:55:58,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:55:58,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:58,235 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 22:55:58,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 22:55:58,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 22:55:58,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 22:55:58,293 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 22:55:58,293 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 22:55:58,293 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 22:55:58,294 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 22:55:58,294 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 22:55:58,295 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrpbrk [2021-10-28 22:55:58,295 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 22:55:58,295 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 22:55:58,296 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 22:55:58,296 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 22:55:58,297 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 22:55:58,297 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 22:55:58,297 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 22:55:58,297 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 22:55:58,297 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 22:55:58,297 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 22:55:58,298 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 22:55:58,298 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 22:55:58,298 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 22:55:58,298 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 22:55:58,298 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 22:55:58,298 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 22:55:58,299 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 22:55:58,299 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 22:55:58,299 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 22:55:58,299 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 22:55:58,299 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 22:55:58,299 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 22:55:58,300 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 22:55:58,300 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 22:55:58,300 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 22:55:58,300 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 22:55:58,301 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 22:55:58,301 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 22:55:58,301 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 22:55:58,301 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 22:55:58,301 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 22:55:58,301 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 22:55:58,302 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 22:55:58,302 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 22:55:58,302 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 22:55:58,302 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 22:55:58,302 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 22:55:58,302 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 22:55:58,303 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 22:55:58,303 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 22:55:58,303 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 22:55:58,304 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 22:55:58,304 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 22:55:58,304 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 22:55:58,304 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 22:55:58,305 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 22:55:58,306 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 22:55:58,306 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 22:55:58,306 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 22:55:58,306 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 22:55:58,306 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 22:55:58,307 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 22:55:58,307 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 22:55:58,307 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 22:55:58,307 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 22:55:58,307 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 22:55:58,308 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 22:55:58,308 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 22:55:58,308 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 22:55:58,308 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 22:55:58,310 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 22:55:58,310 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 22:55:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 22:55:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 22:55:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 22:55:58,312 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 22:55:58,312 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 22:55:58,312 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 22:55:58,312 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 22:55:58,312 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 22:55:58,313 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 22:55:58,313 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 22:55:58,313 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 22:55:58,314 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 22:55:58,314 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 22:55:58,314 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 22:55:58,315 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 22:55:58,315 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 22:55:58,315 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 22:55:58,315 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 22:55:58,315 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 22:55:58,316 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 22:55:58,316 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 22:55:58,316 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 22:55:58,316 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 22:55:58,316 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 22:55:58,316 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 22:55:58,317 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 22:55:58,317 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 22:55:58,317 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 22:55:58,317 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 22:55:58,317 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 22:55:58,318 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 22:55:58,318 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 22:55:58,318 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 22:55:58,318 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 22:55:58,318 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 22:55:58,318 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 22:55:58,320 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 22:55:58,320 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 22:55:58,320 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 22:55:58,320 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 22:55:58,320 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 22:55:58,321 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 22:55:58,321 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 22:55:58,321 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 22:55:58,322 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 22:55:58,322 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 22:55:58,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 22:55:58,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-28 22:55:58,323 INFO L130 BoogieDeclarations]: Found specification of procedure cstrpbrk [2021-10-28 22:55:58,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 22:55:58,323 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 22:55:58,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 22:55:58,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 22:55:58,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 22:55:58,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 22:55:58,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 22:55:58,951 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 22:55:58,952 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-28 22:55:58,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:55:58 BoogieIcfgContainer [2021-10-28 22:55:58,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 22:55:58,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 22:55:58,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 22:55:58,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 22:55:58,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:55:57" (1/3) ... [2021-10-28 22:55:58,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bede7a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:55:58, skipping insertion in model container [2021-10-28 22:55:58,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:58" (2/3) ... [2021-10-28 22:55:58,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bede7a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:55:58, skipping insertion in model container [2021-10-28 22:55:58,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:55:58" (3/3) ... [2021-10-28 22:55:58,986 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrpbrk-alloca-2.i [2021-10-28 22:55:58,992 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 22:55:58,992 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-10-28 22:55:59,061 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 22:55:59,068 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 22:55:59,069 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-10-28 22:55:59,089 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 32 states have (on average 1.75) internal successors, (56), 45 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 22:55:59,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 22:55:59,097 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:59,098 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:59,098 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:55:59,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:59,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1422603009, now seen corresponding path program 1 times [2021-10-28 22:55:59,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:59,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503699235] [2021-10-28 22:55:59,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:59,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:59,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:59,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:59,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:59,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503699235] [2021-10-28 22:55:59,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503699235] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:59,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:59,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 22:55:59,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629198997] [2021-10-28 22:55:59,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:55:59,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:59,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:55:59,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:55:59,397 INFO L87 Difference]: Start difference. First operand has 52 states, 32 states have (on average 1.75) internal successors, (56), 45 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:59,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:59,541 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-10-28 22:55:59,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 22:55:59,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-28 22:55:59,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:59,553 INFO L225 Difference]: With dead ends: 50 [2021-10-28 22:55:59,553 INFO L226 Difference]: Without dead ends: 47 [2021-10-28 22:55:59,555 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:55:59,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-28 22:55:59,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-10-28 22:55:59,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 41 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:55:59,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-10-28 22:55:59,594 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 11 [2021-10-28 22:55:59,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:59,595 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-10-28 22:55:59,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:59,595 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-10-28 22:55:59,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 22:55:59,596 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:59,596 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:59,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 22:55:59,597 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:55:59,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:59,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1422603008, now seen corresponding path program 1 times [2021-10-28 22:55:59,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:59,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845803713] [2021-10-28 22:55:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:59,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:59,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:59,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:59,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845803713] [2021-10-28 22:55:59,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845803713] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:59,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:59,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 22:55:59,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740678915] [2021-10-28 22:55:59,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:55:59,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:59,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:55:59,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:55:59,850 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:00,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:00,037 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-10-28 22:56:00,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:56:00,038 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-28 22:56:00,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:00,041 INFO L225 Difference]: With dead ends: 51 [2021-10-28 22:56:00,042 INFO L226 Difference]: Without dead ends: 51 [2021-10-28 22:56:00,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:56:00,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-28 22:56:00,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-10-28 22:56:00,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 43 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:56:00,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-10-28 22:56:00,064 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 11 [2021-10-28 22:56:00,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:00,065 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-10-28 22:56:00,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:00,065 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-10-28 22:56:00,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 22:56:00,066 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:00,067 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:00,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 22:56:00,068 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:00,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:00,070 INFO L85 PathProgramCache]: Analyzing trace with hash 973924227, now seen corresponding path program 1 times [2021-10-28 22:56:00,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:00,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489450176] [2021-10-28 22:56:00,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:00,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:00,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:56:00,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:00,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489450176] [2021-10-28 22:56:00,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489450176] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:00,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638909316] [2021-10-28 22:56:00,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:00,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:00,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:00,269 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:00,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 22:56:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:00,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 22:56:00,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:56:00,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638909316] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:56:00,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:56:00,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-10-28 22:56:00,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036851577] [2021-10-28 22:56:00,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:56:00,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:00,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:56:00,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:56:00,665 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:00,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:00,701 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2021-10-28 22:56:00,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:56:00,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-28 22:56:00,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:00,705 INFO L225 Difference]: With dead ends: 72 [2021-10-28 22:56:00,705 INFO L226 Difference]: Without dead ends: 72 [2021-10-28 22:56:00,706 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:56:00,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-28 22:56:00,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2021-10-28 22:56:00,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.45) internal successors, (58), 50 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:56:00,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-10-28 22:56:00,717 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 15 [2021-10-28 22:56:00,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:00,718 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-10-28 22:56:00,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:00,718 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-10-28 22:56:00,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 22:56:00,719 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:00,719 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:00,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:00,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:00,940 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:00,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:00,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1653982597, now seen corresponding path program 1 times [2021-10-28 22:56:00,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:00,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127389505] [2021-10-28 22:56:00,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:00,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:01,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:01,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:56:01,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:01,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127389505] [2021-10-28 22:56:01,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127389505] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:01,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142716190] [2021-10-28 22:56:01,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:01,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:01,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:01,064 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:01,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 22:56:01,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:01,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 22:56:01,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:01,342 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 22:56:01,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 22:56:01,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-10-28 22:56:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:56:01,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142716190] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:01,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:01,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-28 22:56:01,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537664243] [2021-10-28 22:56:01,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:56:01,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:01,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:56:01,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:56:01,511 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-10-28 22:56:01,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:01,696 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-10-28 22:56:01,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:56:01,697 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 [2021-10-28 22:56:01,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:01,699 INFO L225 Difference]: With dead ends: 57 [2021-10-28 22:56:01,699 INFO L226 Difference]: Without dead ends: 57 [2021-10-28 22:56:01,700 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:56:01,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-28 22:56:01,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-10-28 22:56:01,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.435897435897436) internal successors, (56), 48 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:56:01,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-10-28 22:56:01,720 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 15 [2021-10-28 22:56:01,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:01,721 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-10-28 22:56:01,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-10-28 22:56:01,721 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-10-28 22:56:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 22:56:01,722 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:01,722 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:01,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:01,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:01,923 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:01,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:01,924 INFO L85 PathProgramCache]: Analyzing trace with hash -361738470, now seen corresponding path program 1 times [2021-10-28 22:56:01,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:01,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314788148] [2021-10-28 22:56:01,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:01,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:01,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:02,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:02,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314788148] [2021-10-28 22:56:02,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314788148] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:56:02,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:56:02,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 22:56:02,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051630616] [2021-10-28 22:56:02,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:56:02,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:02,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:56:02,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:56:02,009 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:02,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:02,144 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2021-10-28 22:56:02,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:56:02,145 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-28 22:56:02,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:02,149 INFO L225 Difference]: With dead ends: 60 [2021-10-28 22:56:02,150 INFO L226 Difference]: Without dead ends: 60 [2021-10-28 22:56:02,150 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:56:02,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-28 22:56:02,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2021-10-28 22:56:02,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.425) internal successors, (57), 49 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:56:02,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-10-28 22:56:02,170 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 17 [2021-10-28 22:56:02,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:02,171 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-10-28 22:56:02,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:02,172 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-10-28 22:56:02,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 22:56:02,179 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:02,179 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:02,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 22:56:02,181 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:02,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:02,182 INFO L85 PathProgramCache]: Analyzing trace with hash -361738418, now seen corresponding path program 1 times [2021-10-28 22:56:02,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:02,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760581283] [2021-10-28 22:56:02,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:02,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:02,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:02,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:02,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760581283] [2021-10-28 22:56:02,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760581283] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:56:02,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:56:02,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 22:56:02,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345585932] [2021-10-28 22:56:02,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:56:02,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:02,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:56:02,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:56:02,284 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:02,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:02,373 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2021-10-28 22:56:02,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 22:56:02,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-28 22:56:02,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:02,375 INFO L225 Difference]: With dead ends: 53 [2021-10-28 22:56:02,375 INFO L226 Difference]: Without dead ends: 53 [2021-10-28 22:56:02,375 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:56:02,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-28 22:56:02,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-10-28 22:56:02,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.375) internal successors, (55), 47 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:56:02,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-10-28 22:56:02,386 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 17 [2021-10-28 22:56:02,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:02,386 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-10-28 22:56:02,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:02,387 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-10-28 22:56:02,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 22:56:02,388 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:02,389 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:02,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 22:56:02,389 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:02,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:02,390 INFO L85 PathProgramCache]: Analyzing trace with hash -361738417, now seen corresponding path program 1 times [2021-10-28 22:56:02,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:02,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680863331] [2021-10-28 22:56:02,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:02,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:02,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:02,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:02,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:02,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680863331] [2021-10-28 22:56:02,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680863331] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:56:02,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:56:02,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 22:56:02,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145777644] [2021-10-28 22:56:02,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:56:02,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:02,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:56:02,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:56:02,551 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:02,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:02,680 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-10-28 22:56:02,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:56:02,681 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-28 22:56:02,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:02,682 INFO L225 Difference]: With dead ends: 55 [2021-10-28 22:56:02,682 INFO L226 Difference]: Without dead ends: 55 [2021-10-28 22:56:02,682 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:56:02,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-28 22:56:02,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-10-28 22:56:02,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 47 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:56:02,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-10-28 22:56:02,687 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 17 [2021-10-28 22:56:02,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:02,688 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-10-28 22:56:02,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:02,688 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-10-28 22:56:02,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 22:56:02,689 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:02,689 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:02,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 22:56:02,690 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:02,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:02,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1877401955, now seen corresponding path program 1 times [2021-10-28 22:56:02,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:02,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400297272] [2021-10-28 22:56:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:02,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:02,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:02,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:02,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:02,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400297272] [2021-10-28 22:56:02,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400297272] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:02,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775644277] [2021-10-28 22:56:02,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:02,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:02,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:02,832 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:02,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 22:56:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:02,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 22:56:02,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:03,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775644277] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:03,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:03,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-10-28 22:56:03,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528214731] [2021-10-28 22:56:03,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 22:56:03,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:03,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 22:56:03,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:56:03,285 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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) [2021-10-28 22:56:03,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:03,485 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2021-10-28 22:56:03,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:56:03,486 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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 21 [2021-10-28 22:56:03,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:03,487 INFO L225 Difference]: With dead ends: 67 [2021-10-28 22:56:03,487 INFO L226 Difference]: Without dead ends: 67 [2021-10-28 22:56:03,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:56:03,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-28 22:56:03,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-10-28 22:56:03,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 55 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:56:03,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-10-28 22:56:03,493 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 21 [2021-10-28 22:56:03,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:03,493 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-10-28 22:56:03,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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) [2021-10-28 22:56:03,493 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-10-28 22:56:03,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 22:56:03,494 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:03,494 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:03,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:03,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:03,724 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:03,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:03,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1877401902, now seen corresponding path program 1 times [2021-10-28 22:56:03,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:03,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761086225] [2021-10-28 22:56:03,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:03,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:03,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:03,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:03,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761086225] [2021-10-28 22:56:03,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761086225] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:03,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861816592] [2021-10-28 22:56:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:03,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:03,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:03,812 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:03,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 22:56:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:03,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 22:56:04,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:04,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861816592] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:56:04,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:56:04,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-10-28 22:56:04,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524061061] [2021-10-28 22:56:04,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:56:04,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:04,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:56:04,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:56:04,139 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:04,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:04,169 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2021-10-28 22:56:04,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:56:04,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-28 22:56:04,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:04,174 INFO L225 Difference]: With dead ends: 93 [2021-10-28 22:56:04,174 INFO L226 Difference]: Without dead ends: 93 [2021-10-28 22:56:04,174 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:56:04,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-28 22:56:04,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2021-10-28 22:56:04,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 79 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:56:04,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2021-10-28 22:56:04,181 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 21 [2021-10-28 22:56:04,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:04,182 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2021-10-28 22:56:04,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:04,182 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2021-10-28 22:56:04,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 22:56:04,184 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:04,184 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:04,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:04,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:04,408 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:04,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:04,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1406448144, now seen corresponding path program 1 times [2021-10-28 22:56:04,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:04,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819578590] [2021-10-28 22:56:04,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:04,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:04,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:04,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:04,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:04,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819578590] [2021-10-28 22:56:04,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819578590] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:04,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824898523] [2021-10-28 22:56:04,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:04,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:04,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:04,524 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:04,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 22:56:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:04,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 22:56:04,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:04,751 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 22:56:04,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 22:56:04,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:04,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824898523] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:04,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:04,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-10-28 22:56:04,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558565022] [2021-10-28 22:56:04,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:56:04,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:04,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:56:04,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:56:04,910 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2021-10-28 22:56:05,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:05,061 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2021-10-28 22:56:05,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 22:56:05,062 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 21 [2021-10-28 22:56:05,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:05,063 INFO L225 Difference]: With dead ends: 88 [2021-10-28 22:56:05,063 INFO L226 Difference]: Without dead ends: 88 [2021-10-28 22:56:05,064 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:56:05,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-28 22:56:05,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2021-10-28 22:56:05,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 76 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:56:05,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2021-10-28 22:56:05,070 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 21 [2021-10-28 22:56:05,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:05,070 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2021-10-28 22:56:05,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2021-10-28 22:56:05,071 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2021-10-28 22:56:05,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 22:56:05,072 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:05,072 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:05,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:05,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:05,288 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:05,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:05,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1137701663, now seen corresponding path program 1 times [2021-10-28 22:56:05,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:05,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638674647] [2021-10-28 22:56:05,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:05,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:05,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:05,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:05,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:05,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:05,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638674647] [2021-10-28 22:56:05,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638674647] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:56:05,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:56:05,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 22:56:05,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474446781] [2021-10-28 22:56:05,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:56:05,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:05,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:56:05,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:56:05,428 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:05,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:05,581 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2021-10-28 22:56:05,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:56:05,581 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-28 22:56:05,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:05,582 INFO L225 Difference]: With dead ends: 81 [2021-10-28 22:56:05,583 INFO L226 Difference]: Without dead ends: 81 [2021-10-28 22:56:05,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:56:05,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-28 22:56:05,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 68. [2021-10-28 22:56:05,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 62 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:56:05,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-10-28 22:56:05,588 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 21 [2021-10-28 22:56:05,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:05,589 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-10-28 22:56:05,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:05,589 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-10-28 22:56:05,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 22:56:05,591 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:05,591 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:05,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 22:56:05,591 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:05,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:05,592 INFO L85 PathProgramCache]: Analyzing trace with hash -684951934, now seen corresponding path program 1 times [2021-10-28 22:56:05,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:05,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823398437] [2021-10-28 22:56:05,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:05,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:05,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:05,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:05,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:05,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823398437] [2021-10-28 22:56:05,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823398437] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:05,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75560754] [2021-10-28 22:56:05,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:05,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:05,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:05,757 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:05,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 22:56:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:05,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 22:56:05,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:06,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75560754] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:06,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:06,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-10-28 22:56:06,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710751405] [2021-10-28 22:56:06,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 22:56:06,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:06,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 22:56:06,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-10-28 22:56:06,216 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 11 states have internal predecessors, (40), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:06,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:06,528 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-10-28 22:56:06,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 22:56:06,529 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 11 states have internal predecessors, (40), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-10-28 22:56:06,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:06,530 INFO L225 Difference]: With dead ends: 79 [2021-10-28 22:56:06,530 INFO L226 Difference]: Without dead ends: 79 [2021-10-28 22:56:06,530 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-10-28 22:56:06,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-28 22:56:06,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2021-10-28 22:56:06,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 64 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:56:06,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2021-10-28 22:56:06,535 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 26 [2021-10-28 22:56:06,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:06,535 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2021-10-28 22:56:06,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 11 states have internal predecessors, (40), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:06,536 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2021-10-28 22:56:06,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 22:56:06,537 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:06,537 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:06,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:06,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:06,740 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrpbrkErr0REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:06,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:06,741 INFO L85 PathProgramCache]: Analyzing trace with hash -684951935, now seen corresponding path program 1 times [2021-10-28 22:56:06,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:06,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046461781] [2021-10-28 22:56:06,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:06,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:06,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:06,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:06,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046461781] [2021-10-28 22:56:06,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046461781] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:56:06,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:56:06,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 22:56:06,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272881534] [2021-10-28 22:56:06,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:56:06,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:06,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:56:06,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:56:06,822 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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) [2021-10-28 22:56:06,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:06,965 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-10-28 22:56:06,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 22:56:06,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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 26 [2021-10-28 22:56:06,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:06,967 INFO L225 Difference]: With dead ends: 69 [2021-10-28 22:56:06,967 INFO L226 Difference]: Without dead ends: 69 [2021-10-28 22:56:06,967 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:56:06,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-28 22:56:06,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-28 22:56:06,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 60 states have (on average 1.2) internal successors, (72), 63 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:56:06,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2021-10-28 22:56:06,972 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 26 [2021-10-28 22:56:06,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:06,972 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2021-10-28 22:56:06,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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) [2021-10-28 22:56:06,973 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2021-10-28 22:56:06,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-28 22:56:06,974 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:06,974 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:06,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 22:56:06,975 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrpbrkErr2REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:06,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:06,976 INFO L85 PathProgramCache]: Analyzing trace with hash -418036057, now seen corresponding path program 1 times [2021-10-28 22:56:06,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:06,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914993937] [2021-10-28 22:56:06,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:06,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:07,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:07,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:07,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:07,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914993937] [2021-10-28 22:56:07,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914993937] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:56:07,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:56:07,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 22:56:07,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977685856] [2021-10-28 22:56:07,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:56:07,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:07,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:56:07,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:56:07,061 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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) [2021-10-28 22:56:07,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:07,271 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2021-10-28 22:56:07,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 22:56:07,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 30 [2021-10-28 22:56:07,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:07,274 INFO L225 Difference]: With dead ends: 73 [2021-10-28 22:56:07,274 INFO L226 Difference]: Without dead ends: 73 [2021-10-28 22:56:07,275 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:56:07,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-28 22:56:07,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2021-10-28 22:56:07,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 62 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:56:07,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-10-28 22:56:07,279 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 30 [2021-10-28 22:56:07,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:07,279 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-10-28 22:56:07,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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) [2021-10-28 22:56:07,280 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-10-28 22:56:07,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-28 22:56:07,281 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:07,282 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:07,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 22:56:07,282 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:07,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:07,283 INFO L85 PathProgramCache]: Analyzing trace with hash -418036056, now seen corresponding path program 1 times [2021-10-28 22:56:07,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:07,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654905819] [2021-10-28 22:56:07,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:07,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:07,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:07,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:07,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:07,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 22:56:07,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:07,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654905819] [2021-10-28 22:56:07,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654905819] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:56:07,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:56:07,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 22:56:07,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37246241] [2021-10-28 22:56:07,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 22:56:07,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:07,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 22:56:07,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:56:07,419 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 10 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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) [2021-10-28 22:56:07,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:07,677 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-10-28 22:56:07,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:56:07,678 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 30 [2021-10-28 22:56:07,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:07,679 INFO L225 Difference]: With dead ends: 72 [2021-10-28 22:56:07,679 INFO L226 Difference]: Without dead ends: 72 [2021-10-28 22:56:07,679 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-10-28 22:56:07,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-28 22:56:07,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-10-28 22:56:07,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 64 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:56:07,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2021-10-28 22:56:07,683 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 30 [2021-10-28 22:56:07,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:07,683 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2021-10-28 22:56:07,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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) [2021-10-28 22:56:07,684 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2021-10-28 22:56:07,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-28 22:56:07,685 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:07,685 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:07,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-28 22:56:07,685 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:07,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:07,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1655830610, now seen corresponding path program 1 times [2021-10-28 22:56:07,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:07,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7080935] [2021-10-28 22:56:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:07,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:07,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:07,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-28 22:56:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 22:56:07,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:07,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7080935] [2021-10-28 22:56:07,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7080935] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:56:07,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:56:07,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 22:56:07,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097102109] [2021-10-28 22:56:07,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:56:07,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:07,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:56:07,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:56:07,770 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:56:07,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:07,827 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-10-28 22:56:07,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 22:56:07,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-10-28 22:56:07,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:07,829 INFO L225 Difference]: With dead ends: 69 [2021-10-28 22:56:07,829 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 22:56:07,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:56:07,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 22:56:07,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-28 22:56:07,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 59 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:07,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2021-10-28 22:56:07,833 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 33 [2021-10-28 22:56:07,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:07,833 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2021-10-28 22:56:07,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:56:07,834 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2021-10-28 22:56:07,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 22:56:07,835 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:07,835 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:07,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-28 22:56:07,836 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:07,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:07,836 INFO L85 PathProgramCache]: Analyzing trace with hash 942908492, now seen corresponding path program 1 times [2021-10-28 22:56:07,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:07,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784908055] [2021-10-28 22:56:07,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:07,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:08,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 22:56:08,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:08,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784908055] [2021-10-28 22:56:08,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784908055] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:56:08,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:56:08,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 22:56:08,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971586099] [2021-10-28 22:56:08,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 22:56:08,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:08,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 22:56:08,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:56:08,027 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 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) [2021-10-28 22:56:08,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:08,293 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-10-28 22:56:08,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 22:56:08,294 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 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 34 [2021-10-28 22:56:08,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:08,295 INFO L225 Difference]: With dead ends: 84 [2021-10-28 22:56:08,295 INFO L226 Difference]: Without dead ends: 51 [2021-10-28 22:56:08,295 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-10-28 22:56:08,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-28 22:56:08,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-10-28 22:56:08,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 46 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:08,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2021-10-28 22:56:08,298 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 34 [2021-10-28 22:56:08,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:08,299 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2021-10-28 22:56:08,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 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) [2021-10-28 22:56:08,299 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2021-10-28 22:56:08,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 22:56:08,300 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:08,300 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:08,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-28 22:56:08,300 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:08,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:08,301 INFO L85 PathProgramCache]: Analyzing trace with hash 433435402, now seen corresponding path program 1 times [2021-10-28 22:56:08,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:08,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530322768] [2021-10-28 22:56:08,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:08,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:08,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:08,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:08,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:08,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:08,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530322768] [2021-10-28 22:56:08,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530322768] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:08,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720416458] [2021-10-28 22:56:08,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:08,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:08,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:08,616 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:08,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 22:56:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:08,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 22:56:08,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:08,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 22:56:09,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 22:56:09,296 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-28 22:56:09,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-28 22:56:09,830 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-28 22:56:09,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 32 [2021-10-28 22:56:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:09,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720416458] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:09,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:09,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-10-28 22:56:09,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305069847] [2021-10-28 22:56:09,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 22:56:09,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:09,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 22:56:09,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-10-28 22:56:09,863 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 21 states, 20 states have (on average 2.4) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:10,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:10,864 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2021-10-28 22:56:10,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 22:56:10,865 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-10-28 22:56:10,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:10,866 INFO L225 Difference]: With dead ends: 85 [2021-10-28 22:56:10,866 INFO L226 Difference]: Without dead ends: 65 [2021-10-28 22:56:10,867 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2021-10-28 22:56:10,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-28 22:56:10,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2021-10-28 22:56:10,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 54 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:10,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2021-10-28 22:56:10,870 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 34 [2021-10-28 22:56:10,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:10,870 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2021-10-28 22:56:10,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:10,871 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2021-10-28 22:56:10,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 22:56:10,871 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:10,871 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:10,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:11,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 22:56:11,072 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:11,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:11,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1542789593, now seen corresponding path program 2 times [2021-10-28 22:56:11,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:11,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707470148] [2021-10-28 22:56:11,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:11,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:11,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:11,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:11,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707470148] [2021-10-28 22:56:11,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707470148] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:11,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029634888] [2021-10-28 22:56:11,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:56:11,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:11,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:11,266 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:11,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 22:56:11,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:56:11,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:56:11,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 22:56:11,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:11,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:11,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029634888] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:11,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:11,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-28 22:56:11,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442436680] [2021-10-28 22:56:11,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 22:56:11,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:11,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 22:56:11,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-10-28 22:56:11,861 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 15 states have internal predecessors, (56), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:12,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:12,338 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2021-10-28 22:56:12,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 22:56:12,339 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 15 states have internal predecessors, (56), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-10-28 22:56:12,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:12,339 INFO L225 Difference]: With dead ends: 75 [2021-10-28 22:56:12,340 INFO L226 Difference]: Without dead ends: 75 [2021-10-28 22:56:12,340 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-10-28 22:56:12,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-28 22:56:12,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2021-10-28 22:56:12,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.140625) internal successors, (73), 65 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:12,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2021-10-28 22:56:12,344 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 38 [2021-10-28 22:56:12,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:12,345 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2021-10-28 22:56:12,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 15 states have internal predecessors, (56), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:12,345 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2021-10-28 22:56:12,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 22:56:12,346 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:12,346 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:12,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:12,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:12,572 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:12,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:12,573 INFO L85 PathProgramCache]: Analyzing trace with hash -581752220, now seen corresponding path program 1 times [2021-10-28 22:56:12,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:12,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965398045] [2021-10-28 22:56:12,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:12,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:12,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 22:56:12,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:12,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965398045] [2021-10-28 22:56:12,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965398045] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:56:12,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:56:12,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-28 22:56:12,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921283413] [2021-10-28 22:56:12,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 22:56:12,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:12,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 22:56:12,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:56:12,825 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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) [2021-10-28 22:56:13,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:13,220 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2021-10-28 22:56:13,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 22:56:13,221 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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 39 [2021-10-28 22:56:13,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:13,221 INFO L225 Difference]: With dead ends: 94 [2021-10-28 22:56:13,222 INFO L226 Difference]: Without dead ends: 94 [2021-10-28 22:56:13,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-10-28 22:56:13,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-28 22:56:13,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2021-10-28 22:56:13,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 86 states have internal predecessors, (95), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:13,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2021-10-28 22:56:13,226 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 39 [2021-10-28 22:56:13,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:13,226 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2021-10-28 22:56:13,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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) [2021-10-28 22:56:13,226 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2021-10-28 22:56:13,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 22:56:13,227 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:13,227 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:13,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-28 22:56:13,228 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:13,228 INFO L85 PathProgramCache]: Analyzing trace with hash -306992606, now seen corresponding path program 1 times [2021-10-28 22:56:13,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:13,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221357018] [2021-10-28 22:56:13,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:13,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:13,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:13,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 22:56:13,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:13,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221357018] [2021-10-28 22:56:13,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221357018] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:13,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268599236] [2021-10-28 22:56:13,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:13,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:13,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:13,484 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:13,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 22:56:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:13,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 22:56:13,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:13,967 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 [2021-10-28 22:56:14,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 22:56:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 22:56:14,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268599236] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:14,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:14,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 19 [2021-10-28 22:56:14,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189464640] [2021-10-28 22:56:14,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 22:56:14,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:14,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 22:56:14,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-10-28 22:56:14,100 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:14,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:14,778 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2021-10-28 22:56:14,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 22:56:14,778 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-10-28 22:56:14,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:14,781 INFO L225 Difference]: With dead ends: 123 [2021-10-28 22:56:14,781 INFO L226 Difference]: Without dead ends: 123 [2021-10-28 22:56:14,782 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 22:56:14,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-28 22:56:14,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 96. [2021-10-28 22:56:14,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 89 states have (on average 1.1235955056179776) internal successors, (100), 90 states have internal predecessors, (100), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:14,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2021-10-28 22:56:14,787 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 39 [2021-10-28 22:56:14,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:14,787 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2021-10-28 22:56:14,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:14,788 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2021-10-28 22:56:14,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-28 22:56:14,789 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:14,789 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:14,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:15,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-28 22:56:15,004 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:15,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:15,005 INFO L85 PathProgramCache]: Analyzing trace with hash 149054821, now seen corresponding path program 2 times [2021-10-28 22:56:15,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:15,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989010499] [2021-10-28 22:56:15,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:15,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:15,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 22:56:15,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:15,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989010499] [2021-10-28 22:56:15,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989010499] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:15,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664856053] [2021-10-28 22:56:15,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:56:15,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:15,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:15,298 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:15,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 22:56:15,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:56:15,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:56:15,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 22:56:15,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:15,964 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 22:56:15,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664856053] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:15,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:15,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-10-28 22:56:15,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976740697] [2021-10-28 22:56:15,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 22:56:15,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:15,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 22:56:15,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-10-28 22:56:15,967 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 22 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:16,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:16,647 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2021-10-28 22:56:16,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 22:56:16,647 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-10-28 22:56:16,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:16,649 INFO L225 Difference]: With dead ends: 118 [2021-10-28 22:56:16,649 INFO L226 Difference]: Without dead ends: 118 [2021-10-28 22:56:16,650 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-10-28 22:56:16,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-28 22:56:16,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2021-10-28 22:56:16,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 99 states have (on average 1.1313131313131313) internal successors, (112), 100 states have internal predecessors, (112), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:16,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2021-10-28 22:56:16,656 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 43 [2021-10-28 22:56:16,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:16,657 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2021-10-28 22:56:16,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:16,657 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2021-10-28 22:56:16,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 22:56:16,658 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:16,658 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:16,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:16,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-28 22:56:16,877 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:16,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:16,877 INFO L85 PathProgramCache]: Analyzing trace with hash -2091999503, now seen corresponding path program 3 times [2021-10-28 22:56:16,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:16,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245182456] [2021-10-28 22:56:16,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:16,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:17,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:17,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:17,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245182456] [2021-10-28 22:56:17,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245182456] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:17,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761048050] [2021-10-28 22:56:17,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 22:56:17,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:17,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:17,479 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:17,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 22:56:17,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 22:56:17,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:56:17,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 22:56:17,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:17,833 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 22:56:17,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 22:56:18,588 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 27 treesize of output 23 [2021-10-28 22:56:18,716 INFO L354 Elim1Store]: treesize reduction 42, result has 19.2 percent of original size [2021-10-28 22:56:18,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2021-10-28 22:56:21,041 INFO L354 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2021-10-28 22:56:21,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 45 [2021-10-28 22:56:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:21,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761048050] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:21,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:21,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-10-28 22:56:21,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377762505] [2021-10-28 22:56:21,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-28 22:56:21,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:21,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-28 22:56:21,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2021-10-28 22:56:21,072 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 30 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:22,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:22,741 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2021-10-28 22:56:22,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 22:56:22,742 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-10-28 22:56:22,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:22,743 INFO L225 Difference]: With dead ends: 138 [2021-10-28 22:56:22,743 INFO L226 Difference]: Without dead ends: 116 [2021-10-28 22:56:22,745 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=248, Invalid=1822, Unknown=0, NotChecked=0, Total=2070 [2021-10-28 22:56:22,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-28 22:56:22,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2021-10-28 22:56:22,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 104 states have internal predecessors, (116), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:22,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2021-10-28 22:56:22,750 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 46 [2021-10-28 22:56:22,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:22,751 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2021-10-28 22:56:22,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:22,751 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2021-10-28 22:56:22,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 22:56:22,752 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:22,752 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:22,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:22,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 22:56:22,968 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:22,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:22,969 INFO L85 PathProgramCache]: Analyzing trace with hash 357600627, now seen corresponding path program 1 times [2021-10-28 22:56:22,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:22,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025513946] [2021-10-28 22:56:22,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:22,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:22,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:23,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:56:23,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:23,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025513946] [2021-10-28 22:56:23,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025513946] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:23,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736267733] [2021-10-28 22:56:23,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:23,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:23,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:23,710 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:23,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 22:56:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:24,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-28 22:56:24,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:24,141 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 22:56:24,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 22:56:24,759 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 [2021-10-28 22:56:24,866 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-10-28 22:56:24,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-10-28 22:56:26,183 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-10-28 22:56:26,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 40 [2021-10-28 22:56:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:56:26,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736267733] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:26,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:26,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 38 [2021-10-28 22:56:26,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207009904] [2021-10-28 22:56:26,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-28 22:56:26,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:26,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-28 22:56:26,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 22:56:26,215 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:28,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:28,812 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2021-10-28 22:56:28,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 22:56:28,813 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-10-28 22:56:28,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:28,814 INFO L225 Difference]: With dead ends: 152 [2021-10-28 22:56:28,814 INFO L226 Difference]: Without dead ends: 136 [2021-10-28 22:56:28,816 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=353, Invalid=3187, Unknown=0, NotChecked=0, Total=3540 [2021-10-28 22:56:28,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-28 22:56:28,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 120. [2021-10-28 22:56:28,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 113 states have (on average 1.1238938053097345) internal successors, (127), 114 states have internal predecessors, (127), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:28,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2021-10-28 22:56:28,822 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 46 [2021-10-28 22:56:28,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:28,822 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2021-10-28 22:56:28,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:28,823 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2021-10-28 22:56:28,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-28 22:56:28,823 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:28,824 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:28,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:29,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 22:56:29,032 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:29,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:29,033 INFO L85 PathProgramCache]: Analyzing trace with hash 947634242, now seen corresponding path program 3 times [2021-10-28 22:56:29,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:29,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878951404] [2021-10-28 22:56:29,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:29,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:29,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 22:56:29,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:29,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878951404] [2021-10-28 22:56:29,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878951404] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:29,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953049421] [2021-10-28 22:56:29,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 22:56:29,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:29,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:29,456 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:29,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 22:56:30,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 22:56:30,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:56:30,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-28 22:56:30,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:30,267 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 [2021-10-28 22:56:30,679 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-10-28 22:56:30,680 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 24 treesize of output 16 [2021-10-28 22:56:30,695 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 22:56:30,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953049421] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:30,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:30,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 29 [2021-10-28 22:56:30,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954687574] [2021-10-28 22:56:30,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 22:56:30,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:30,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 22:56:30,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-10-28 22:56:30,699 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 29 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:32,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:32,044 INFO L93 Difference]: Finished difference Result 167 states and 182 transitions. [2021-10-28 22:56:32,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 22:56:32,045 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-10-28 22:56:32,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:32,046 INFO L225 Difference]: With dead ends: 167 [2021-10-28 22:56:32,046 INFO L226 Difference]: Without dead ends: 167 [2021-10-28 22:56:32,047 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=274, Invalid=1888, Unknown=0, NotChecked=0, Total=2162 [2021-10-28 22:56:32,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-10-28 22:56:32,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 156. [2021-10-28 22:56:32,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 148 states have (on average 1.1216216216216217) internal successors, (166), 149 states have internal predecessors, (166), 5 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:32,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 172 transitions. [2021-10-28 22:56:32,053 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 172 transitions. Word has length 48 [2021-10-28 22:56:32,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:32,053 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 172 transitions. [2021-10-28 22:56:32,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:32,054 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 172 transitions. [2021-10-28 22:56:32,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-28 22:56:32,054 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:32,054 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:32,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:32,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:32,268 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:32,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:32,268 INFO L85 PathProgramCache]: Analyzing trace with hash -2061037938, now seen corresponding path program 4 times [2021-10-28 22:56:32,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:32,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372151761] [2021-10-28 22:56:32,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:32,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:32,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:32,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:32,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372151761] [2021-10-28 22:56:32,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372151761] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:32,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571476555] [2021-10-28 22:56:32,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 22:56:32,469 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:32,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:32,472 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:32,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 22:56:32,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 22:56:32,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:56:32,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-28 22:56:32,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:33,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571476555] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:33,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:33,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-10-28 22:56:33,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242647376] [2021-10-28 22:56:33,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 22:56:33,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:33,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 22:56:33,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-10-28 22:56:33,291 INFO L87 Difference]: Start difference. First operand 156 states and 172 transitions. Second operand has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:33,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:33,815 INFO L93 Difference]: Finished difference Result 283 states and 311 transitions. [2021-10-28 22:56:33,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 22:56:33,816 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-10-28 22:56:33,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:33,817 INFO L225 Difference]: With dead ends: 283 [2021-10-28 22:56:33,817 INFO L226 Difference]: Without dead ends: 283 [2021-10-28 22:56:33,818 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-10-28 22:56:33,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-10-28 22:56:33,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 209. [2021-10-28 22:56:33,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 199 states have (on average 1.120603015075377) internal successors, (223), 200 states have internal predecessors, (223), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:33,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 231 transitions. [2021-10-28 22:56:33,826 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 231 transitions. Word has length 50 [2021-10-28 22:56:33,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:33,827 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 231 transitions. [2021-10-28 22:56:33,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:33,827 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 231 transitions. [2021-10-28 22:56:33,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-28 22:56:33,828 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:33,828 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:33,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-28 22:56:34,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:34,044 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:34,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:34,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1444425936, now seen corresponding path program 2 times [2021-10-28 22:56:34,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:34,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837730958] [2021-10-28 22:56:34,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:34,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:34,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:34,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 22:56:34,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:34,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837730958] [2021-10-28 22:56:34,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837730958] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:34,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830609606] [2021-10-28 22:56:34,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:56:34,419 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:34,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:34,420 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:34,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 22:56:34,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:56:34,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:56:34,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 22:56:34,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:34,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 22:56:35,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 22:56:35,313 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-28 22:56:35,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-28 22:56:36,242 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-28 22:56:36,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 34 [2021-10-28 22:56:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 22:56:36,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830609606] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:36,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:36,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2021-10-28 22:56:36,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237124923] [2021-10-28 22:56:36,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 22:56:36,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:36,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 22:56:36,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-10-28 22:56:36,267 INFO L87 Difference]: Start difference. First operand 209 states and 231 transitions. Second operand has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 25 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:37,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:37,592 INFO L93 Difference]: Finished difference Result 253 states and 276 transitions. [2021-10-28 22:56:37,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 22:56:37,593 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 25 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-10-28 22:56:37,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:37,594 INFO L225 Difference]: With dead ends: 253 [2021-10-28 22:56:37,594 INFO L226 Difference]: Without dead ends: 228 [2021-10-28 22:56:37,595 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 22:56:37,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-10-28 22:56:37,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 221. [2021-10-28 22:56:37,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 212 states have (on average 1.1132075471698113) internal successors, (236), 213 states have internal predecessors, (236), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:37,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 243 transitions. [2021-10-28 22:56:37,604 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 243 transitions. Word has length 50 [2021-10-28 22:56:37,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:37,604 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 243 transitions. [2021-10-28 22:56:37,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 25 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:37,605 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 243 transitions. [2021-10-28 22:56:37,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-28 22:56:37,605 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:37,606 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:37,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-28 22:56:37,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 22:56:37,820 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:37,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:37,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1709703263, now seen corresponding path program 4 times [2021-10-28 22:56:37,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:37,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782880539] [2021-10-28 22:56:37,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:37,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:38,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 22:56:38,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:38,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782880539] [2021-10-28 22:56:38,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782880539] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:38,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647309714] [2021-10-28 22:56:38,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 22:56:38,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:38,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:38,116 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:38,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 22:56:38,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 22:56:38,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:56:38,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-28 22:56:38,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 22:56:38,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647309714] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:38,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:38,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-10-28 22:56:38,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553802061] [2021-10-28 22:56:38,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-28 22:56:38,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:38,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-28 22:56:38,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-10-28 22:56:38,956 INFO L87 Difference]: Start difference. First operand 221 states and 243 transitions. Second operand has 24 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:39,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:39,620 INFO L93 Difference]: Finished difference Result 272 states and 299 transitions. [2021-10-28 22:56:39,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 22:56:39,620 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-10-28 22:56:39,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:39,623 INFO L225 Difference]: With dead ends: 272 [2021-10-28 22:56:39,623 INFO L226 Difference]: Without dead ends: 272 [2021-10-28 22:56:39,624 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-10-28 22:56:39,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-10-28 22:56:39,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 241. [2021-10-28 22:56:39,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 232 states have (on average 1.1163793103448276) internal successors, (259), 233 states have internal predecessors, (259), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:39,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 266 transitions. [2021-10-28 22:56:39,634 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 266 transitions. Word has length 52 [2021-10-28 22:56:39,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:39,634 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 266 transitions. [2021-10-28 22:56:39,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:39,635 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 266 transitions. [2021-10-28 22:56:39,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-28 22:56:39,636 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:39,636 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:39,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:39,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 22:56:39,856 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:39,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:39,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1417547384, now seen corresponding path program 5 times [2021-10-28 22:56:39,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:39,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199598841] [2021-10-28 22:56:39,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:39,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:39,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:40,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:56:40,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:40,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199598841] [2021-10-28 22:56:40,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199598841] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:40,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51063100] [2021-10-28 22:56:40,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 22:56:40,796 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:40,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:40,798 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:40,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 22:56:41,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-28 22:56:41,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:56:41,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 58 conjunts are in the unsatisfiable core [2021-10-28 22:56:41,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:41,344 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 22:56:41,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 22:56:41,761 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 [2021-10-28 22:56:42,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 22:56:42,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-10-28 22:56:42,368 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 22:56:42,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51063100] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:42,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:42,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17] total 41 [2021-10-28 22:56:42,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114779826] [2021-10-28 22:56:42,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-28 22:56:42,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:42,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-28 22:56:42,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1541, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 22:56:42,371 INFO L87 Difference]: Start difference. First operand 241 states and 266 transitions. Second operand has 41 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 38 states have internal predecessors, (98), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:46,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:46,282 INFO L93 Difference]: Finished difference Result 338 states and 368 transitions. [2021-10-28 22:56:46,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-28 22:56:46,282 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 38 states have internal predecessors, (98), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-10-28 22:56:46,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:46,285 INFO L225 Difference]: With dead ends: 338 [2021-10-28 22:56:46,285 INFO L226 Difference]: Without dead ends: 316 [2021-10-28 22:56:46,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=554, Invalid=6088, Unknown=0, NotChecked=0, Total=6642 [2021-10-28 22:56:46,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-10-28 22:56:46,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 265. [2021-10-28 22:56:46,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 256 states have (on average 1.1171875) internal successors, (286), 257 states have internal predecessors, (286), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:46,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 293 transitions. [2021-10-28 22:56:46,299 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 293 transitions. Word has length 57 [2021-10-28 22:56:46,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:46,299 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 293 transitions. [2021-10-28 22:56:46,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 38 states have internal predecessors, (98), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:46,300 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 293 transitions. [2021-10-28 22:56:46,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 22:56:46,301 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:46,301 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:46,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:46,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 22:56:46,524 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:46,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:46,524 INFO L85 PathProgramCache]: Analyzing trace with hash -515149736, now seen corresponding path program 5 times [2021-10-28 22:56:46,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:46,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342392539] [2021-10-28 22:56:46,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:46,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:46,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:46,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:46,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342392539] [2021-10-28 22:56:46,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342392539] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:46,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930925053] [2021-10-28 22:56:46,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 22:56:46,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:46,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:46,904 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:46,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 22:56:47,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-28 22:56:47,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:56:47,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 90 conjunts are in the unsatisfiable core [2021-10-28 22:56:47,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:47,928 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 22:56:47,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 22:56:48,746 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 30 treesize of output 26 [2021-10-28 22:56:48,855 INFO L354 Elim1Store]: treesize reduction 42, result has 19.2 percent of original size [2021-10-28 22:56:48,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2021-10-28 22:56:49,637 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 22:56:49,638 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 55 treesize of output 43 [2021-10-28 22:56:50,193 INFO L354 Elim1Store]: treesize reduction 35, result has 18.6 percent of original size [2021-10-28 22:56:50,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 27 [2021-10-28 22:56:50,219 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:56:50,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930925053] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:50,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:50,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26] total 40 [2021-10-28 22:56:50,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361270838] [2021-10-28 22:56:50,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-28 22:56:50,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:50,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-28 22:56:50,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1450, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 22:56:50,223 INFO L87 Difference]: Start difference. First operand 265 states and 293 transitions. Second operand has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 37 states have internal predecessors, (97), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:52,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:52,991 INFO L93 Difference]: Finished difference Result 446 states and 485 transitions. [2021-10-28 22:56:52,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-10-28 22:56:52,991 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 37 states have internal predecessors, (97), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-10-28 22:56:52,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:52,997 INFO L225 Difference]: With dead ends: 446 [2021-10-28 22:56:52,997 INFO L226 Difference]: Without dead ends: 354 [2021-10-28 22:56:53,000 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=459, Invalid=5393, Unknown=0, NotChecked=0, Total=5852 [2021-10-28 22:56:53,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-10-28 22:56:53,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 317. [2021-10-28 22:56:53,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 307 states have (on average 1.1205211726384365) internal successors, (344), 308 states have internal predecessors, (344), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:53,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 352 transitions. [2021-10-28 22:56:53,009 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 352 transitions. Word has length 58 [2021-10-28 22:56:53,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:53,010 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 352 transitions. [2021-10-28 22:56:53,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 37 states have internal predecessors, (97), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:53,010 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 352 transitions. [2021-10-28 22:56:53,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-28 22:56:53,011 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:53,011 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:53,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:53,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:53,228 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:53,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:53,228 INFO L85 PathProgramCache]: Analyzing trace with hash -179282827, now seen corresponding path program 6 times [2021-10-28 22:56:53,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:53,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868097522] [2021-10-28 22:56:53,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:53,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:53,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:53,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:53,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868097522] [2021-10-28 22:56:53,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868097522] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:53,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143468844] [2021-10-28 22:56:53,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 22:56:53,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:53,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:53,476 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:53,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 22:56:54,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-28 22:56:54,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:56:54,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-28 22:56:54,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:54,593 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 22:56:54,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 22:56:54,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 22:56:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:55,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143468844] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:55,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:55,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-10-28 22:56:55,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856242859] [2021-10-28 22:56:55,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 22:56:55,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:55,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 22:56:55,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-10-28 22:56:55,048 INFO L87 Difference]: Start difference. First operand 317 states and 352 transitions. Second operand has 20 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 18 states have internal predecessors, (90), 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) [2021-10-28 22:56:55,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:55,685 INFO L93 Difference]: Finished difference Result 376 states and 413 transitions. [2021-10-28 22:56:55,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 22:56:55,686 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 18 states have internal predecessors, (90), 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 62 [2021-10-28 22:56:55,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:55,688 INFO L225 Difference]: With dead ends: 376 [2021-10-28 22:56:55,688 INFO L226 Difference]: Without dead ends: 376 [2021-10-28 22:56:55,689 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-10-28 22:56:55,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-10-28 22:56:55,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 364. [2021-10-28 22:56:55,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 354 states have (on average 1.1214689265536724) internal successors, (397), 355 states have internal predecessors, (397), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:55,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 405 transitions. [2021-10-28 22:56:55,703 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 405 transitions. Word has length 62 [2021-10-28 22:56:55,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:55,704 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 405 transitions. [2021-10-28 22:56:55,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 18 states have internal predecessors, (90), 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) [2021-10-28 22:56:55,704 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 405 transitions. [2021-10-28 22:56:55,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-10-28 22:56:55,705 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:55,706 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:55,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:55,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:55,920 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:56:55,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:55,920 INFO L85 PathProgramCache]: Analyzing trace with hash -867919012, now seen corresponding path program 6 times [2021-10-28 22:56:55,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:55,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669702761] [2021-10-28 22:56:55,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:55,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:56,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 22:56:56,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:56,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669702761] [2021-10-28 22:56:56,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669702761] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:56,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327279018] [2021-10-28 22:56:56,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 22:56:56,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:56,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:56,348 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:56,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 22:56:57,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-28 22:56:57,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:56:57,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-28 22:56:57,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:57,403 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 22:56:57,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 22:56:57,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-10-28 22:56:57,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 22:56:58,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 22:56:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 22:56:58,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327279018] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:58,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:58,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 33 [2021-10-28 22:56:58,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123286239] [2021-10-28 22:56:58,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-28 22:56:58,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:58,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-28 22:56:58,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 22:56:58,115 INFO L87 Difference]: Start difference. First operand 364 states and 405 transitions. Second operand has 33 states, 32 states have (on average 3.125) internal successors, (100), 31 states have internal predecessors, (100), 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) [2021-10-28 22:57:00,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:57:00,028 INFO L93 Difference]: Finished difference Result 623 states and 683 transitions. [2021-10-28 22:57:00,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-28 22:57:00,030 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.125) internal successors, (100), 31 states have internal predecessors, (100), 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 66 [2021-10-28 22:57:00,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:57:00,033 INFO L225 Difference]: With dead ends: 623 [2021-10-28 22:57:00,033 INFO L226 Difference]: Without dead ends: 550 [2021-10-28 22:57:00,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=400, Invalid=3890, Unknown=0, NotChecked=0, Total=4290 [2021-10-28 22:57:00,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-10-28 22:57:00,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 482. [2021-10-28 22:57:00,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 471 states have (on average 1.1252653927813163) internal successors, (530), 472 states have internal predecessors, (530), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:57:00,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 539 transitions. [2021-10-28 22:57:00,051 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 539 transitions. Word has length 66 [2021-10-28 22:57:00,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:57:00,052 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 539 transitions. [2021-10-28 22:57:00,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.125) internal successors, (100), 31 states have internal predecessors, (100), 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) [2021-10-28 22:57:00,052 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 539 transitions. [2021-10-28 22:57:00,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-10-28 22:57:00,054 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:57:00,054 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:57:00,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 22:57:00,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:57:00,272 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:57:00,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:57:00,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1015556452, now seen corresponding path program 7 times [2021-10-28 22:57:00,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:57:00,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436101578] [2021-10-28 22:57:00,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:57:00,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:57:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:57:00,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:57:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:57:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 22:57:00,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:57:00,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436101578] [2021-10-28 22:57:00,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436101578] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:57:00,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579474652] [2021-10-28 22:57:00,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 22:57:00,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:57:00,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:57:00,552 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:57:00,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 22:57:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:57:01,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-28 22:57:01,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:57:01,781 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 22:57:01,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 22:57:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 22:57:02,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579474652] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:57:02,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:57:02,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-10-28 22:57:02,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549455378] [2021-10-28 22:57:02,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 22:57:02,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:57:02,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 22:57:02,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-10-28 22:57:02,232 INFO L87 Difference]: Start difference. First operand 482 states and 539 transitions. Second operand has 32 states, 31 states have (on average 3.193548387096774) internal successors, (99), 29 states have internal predecessors, (99), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:57:02,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:57:02,963 INFO L93 Difference]: Finished difference Result 671 states and 738 transitions. [2021-10-28 22:57:02,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 22:57:02,964 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.193548387096774) internal successors, (99), 29 states have internal predecessors, (99), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-10-28 22:57:02,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:57:02,967 INFO L225 Difference]: With dead ends: 671 [2021-10-28 22:57:02,967 INFO L226 Difference]: Without dead ends: 605 [2021-10-28 22:57:02,968 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=304, Invalid=1676, Unknown=0, NotChecked=0, Total=1980 [2021-10-28 22:57:02,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-10-28 22:57:02,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 560. [2021-10-28 22:57:02,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 548 states have (on average 1.1222627737226278) internal successors, (615), 549 states have internal predecessors, (615), 9 states have call successors, (9), 9 states have call predecessors, (9), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:57:02,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 625 transitions. [2021-10-28 22:57:02,986 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 625 transitions. Word has length 66 [2021-10-28 22:57:02,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:57:02,986 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 625 transitions. [2021-10-28 22:57:02,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.193548387096774) internal successors, (99), 29 states have internal predecessors, (99), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:57:02,987 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 625 transitions. [2021-10-28 22:57:02,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-28 22:57:02,988 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:57:02,989 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:57:03,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 22:57:03,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:57:03,212 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:57:03,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:57:03,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2006443839, now seen corresponding path program 7 times [2021-10-28 22:57:03,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:57:03,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844571439] [2021-10-28 22:57:03,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:57:03,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:57:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:57:03,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:57:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:57:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:57:03,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:57:03,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844571439] [2021-10-28 22:57:03,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844571439] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:57:03,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828868686] [2021-10-28 22:57:03,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 22:57:03,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:57:03,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:57:03,732 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:57:03,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 22:57:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:57:05,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 70 conjunts are in the unsatisfiable core [2021-10-28 22:57:05,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:57:05,714 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 [2021-10-28 22:57:05,809 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-10-28 22:57:05,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-10-28 22:57:06,886 INFO L354 Elim1Store]: treesize reduction 35, result has 18.6 percent of original size [2021-10-28 22:57:06,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 27 [2021-10-28 22:57:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:57:06,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828868686] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:57:06,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:57:06,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 39 [2021-10-28 22:57:06,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037530199] [2021-10-28 22:57:06,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-28 22:57:06,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:57:06,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-28 22:57:06,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1382, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 22:57:06,909 INFO L87 Difference]: Start difference. First operand 560 states and 625 transitions. Second operand has 39 states, 38 states have (on average 3.1842105263157894) internal successors, (121), 36 states have internal predecessors, (121), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:57:09,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:57:09,454 INFO L93 Difference]: Finished difference Result 944 states and 1040 transitions. [2021-10-28 22:57:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-10-28 22:57:09,456 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.1842105263157894) internal successors, (121), 36 states have internal predecessors, (121), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-10-28 22:57:09,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:57:09,460 INFO L225 Difference]: With dead ends: 944 [2021-10-28 22:57:09,460 INFO L226 Difference]: Without dead ends: 684 [2021-10-28 22:57:09,462 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=411, Invalid=5441, Unknown=0, NotChecked=0, Total=5852 [2021-10-28 22:57:09,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-10-28 22:57:09,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 620. [2021-10-28 22:57:09,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 607 states have (on average 1.1219110378912684) internal successors, (681), 608 states have internal predecessors, (681), 10 states have call successors, (10), 10 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:57:09,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 692 transitions. [2021-10-28 22:57:09,489 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 692 transitions. Word has length 70 [2021-10-28 22:57:09,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:57:09,489 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 692 transitions. [2021-10-28 22:57:09,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.1842105263157894) internal successors, (121), 36 states have internal predecessors, (121), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:57:09,490 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 692 transitions. [2021-10-28 22:57:09,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-28 22:57:09,491 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:57:09,491 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:57:09,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 22:57:09,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:57:09,716 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:57:09,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:57:09,716 INFO L85 PathProgramCache]: Analyzing trace with hash -613552583, now seen corresponding path program 8 times [2021-10-28 22:57:09,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:57:09,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377197146] [2021-10-28 22:57:09,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:57:09,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:57:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:57:10,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:57:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:57:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 22:57:10,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:57:10,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377197146] [2021-10-28 22:57:10,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377197146] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:57:10,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129189822] [2021-10-28 22:57:10,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:57:10,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:57:10,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:57:10,075 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:57:10,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 22:57:10,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:57:10,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:57:10,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-28 22:57:10,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:57:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 22:57:11,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129189822] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:57:11,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:57:11,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 30 [2021-10-28 22:57:11,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901624987] [2021-10-28 22:57:11,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-28 22:57:11,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:57:11,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-28 22:57:11,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-10-28 22:57:11,431 INFO L87 Difference]: Start difference. First operand 620 states and 692 transitions. Second operand has 31 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 28 states have internal predecessors, (100), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:57:12,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:57:12,410 INFO L93 Difference]: Finished difference Result 762 states and 845 transitions. [2021-10-28 22:57:12,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 22:57:12,413 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 28 states have internal predecessors, (100), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-10-28 22:57:12,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:57:12,417 INFO L225 Difference]: With dead ends: 762 [2021-10-28 22:57:12,418 INFO L226 Difference]: Without dead ends: 762 [2021-10-28 22:57:12,419 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=1433, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 22:57:12,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-10-28 22:57:12,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 655. [2021-10-28 22:57:12,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 642 states have (on average 1.1246105919003115) internal successors, (722), 643 states have internal predecessors, (722), 10 states have call successors, (10), 10 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:57:12,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 733 transitions. [2021-10-28 22:57:12,439 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 733 transitions. Word has length 70 [2021-10-28 22:57:12,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:57:12,440 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 733 transitions. [2021-10-28 22:57:12,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 28 states have internal predecessors, (100), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:57:12,440 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 733 transitions. [2021-10-28 22:57:12,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-10-28 22:57:12,442 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:57:12,442 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:57:12,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 22:57:12,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:57:12,659 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:57:12,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:57:12,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1953664988, now seen corresponding path program 8 times [2021-10-28 22:57:12,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:57:12,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994664551] [2021-10-28 22:57:12,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:57:12,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:57:12,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:57:12,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:57:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:57:12,988 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:57:12,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:57:12,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994664551] [2021-10-28 22:57:12,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994664551] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:57:12,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580771403] [2021-10-28 22:57:12,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:57:12,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:57:12,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:57:12,992 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:57:12,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 22:57:13,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:57:13,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:57:13,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-28 22:57:13,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:57:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:57:14,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580771403] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:57:14,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:57:14,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2021-10-28 22:57:14,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624676849] [2021-10-28 22:57:14,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 22:57:14,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:57:14,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 22:57:14,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-10-28 22:57:14,513 INFO L87 Difference]: Start difference. First operand 655 states and 733 transitions. Second operand has 27 states, 26 states have (on average 4.0) internal successors, (104), 24 states have internal predecessors, (104), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:57:15,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:57:15,493 INFO L93 Difference]: Finished difference Result 765 states and 850 transitions. [2021-10-28 22:57:15,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 22:57:15,494 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.0) internal successors, (104), 24 states have internal predecessors, (104), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-10-28 22:57:15,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:57:15,498 INFO L225 Difference]: With dead ends: 765 [2021-10-28 22:57:15,498 INFO L226 Difference]: Without dead ends: 765 [2021-10-28 22:57:15,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 22:57:15,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-10-28 22:57:15,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 748. [2021-10-28 22:57:15,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 735 states have (on average 1.125170068027211) internal successors, (827), 736 states have internal predecessors, (827), 10 states have call successors, (10), 10 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:57:15,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 838 transitions. [2021-10-28 22:57:15,524 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 838 transitions. Word has length 74 [2021-10-28 22:57:15,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:57:15,525 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 838 transitions. [2021-10-28 22:57:15,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.0) internal successors, (104), 24 states have internal predecessors, (104), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:57:15,525 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 838 transitions. [2021-10-28 22:57:15,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-28 22:57:15,531 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:57:15,531 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:57:15,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-28 22:57:15,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-28 22:57:15,739 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:57:15,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:57:15,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1045914642, now seen corresponding path program 9 times [2021-10-28 22:57:15,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:57:15,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118118086] [2021-10-28 22:57:15,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:57:15,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:57:15,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:57:16,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:57:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:57:16,159 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 22:57:16,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:57:16,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118118086] [2021-10-28 22:57:16,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118118086] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:57:16,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73225711] [2021-10-28 22:57:16,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 22:57:16,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:57:16,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:57:16,161 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:57:16,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 22:57:17,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-28 22:57:17,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:57:17,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-28 22:57:17,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:57:17,157 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 22:57:17,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 22:57:17,364 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 23 treesize of output 19 [2021-10-28 22:57:17,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 22:57:17,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-10-28 22:57:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-10-28 22:57:18,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73225711] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:57:18,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:57:18,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 11] total 34 [2021-10-28 22:57:18,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953957184] [2021-10-28 22:57:18,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-28 22:57:18,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:57:18,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-28 22:57:18,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1040, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 22:57:18,086 INFO L87 Difference]: Start difference. First operand 748 states and 838 transitions. Second operand has 34 states, 32 states have (on average 3.09375) internal successors, (99), 31 states have internal predecessors, (99), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:57:23,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:57:23,180 INFO L93 Difference]: Finished difference Result 1142 states and 1256 transitions. [2021-10-28 22:57:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-10-28 22:57:23,180 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 3.09375) internal successors, (99), 31 states have internal predecessors, (99), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-10-28 22:57:23,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:57:23,184 INFO L225 Difference]: With dead ends: 1142 [2021-10-28 22:57:23,185 INFO L226 Difference]: Without dead ends: 803 [2021-10-28 22:57:23,186 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2491 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1025, Invalid=8677, Unknown=0, NotChecked=0, Total=9702 [2021-10-28 22:57:23,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-10-28 22:57:23,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 616. [2021-10-28 22:57:23,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 606 states have (on average 1.1155115511551155) internal successors, (676), 606 states have internal predecessors, (676), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:57:23,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 685 transitions. [2021-10-28 22:57:23,205 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 685 transitions. Word has length 75 [2021-10-28 22:57:23,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:57:23,206 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 685 transitions. [2021-10-28 22:57:23,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 3.09375) internal successors, (99), 31 states have internal predecessors, (99), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:57:23,206 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 685 transitions. [2021-10-28 22:57:23,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-28 22:57:23,208 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:57:23,208 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:57:23,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-28 22:57:23,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-28 22:57:23,428 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:57:23,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:57:23,428 INFO L85 PathProgramCache]: Analyzing trace with hash -27278426, now seen corresponding path program 9 times [2021-10-28 22:57:23,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:57:23,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733486411] [2021-10-28 22:57:23,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:57:23,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:57:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:57:23,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:57:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:57:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 26 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:57:23,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:57:23,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733486411] [2021-10-28 22:57:23,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733486411] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:57:23,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241438748] [2021-10-28 22:57:23,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 22:57:23,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:57:23,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:57:23,941 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:57:23,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-28 22:57:24,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-28 22:57:24,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:57:24,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 70 conjunts are in the unsatisfiable core [2021-10-28 22:57:24,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:57:25,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 22:57:25,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 22:57:25,480 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-28 22:57:25,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-28 22:57:26,905 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-28 22:57:26,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-10-28 22:57:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 26 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:57:26,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241438748] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:57:26,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:57:26,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 39 [2021-10-28 22:57:26,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793456316] [2021-10-28 22:57:26,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-28 22:57:26,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:57:26,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-28 22:57:26,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1389, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 22:57:26,927 INFO L87 Difference]: Start difference. First operand 616 states and 685 transitions. Second operand has 39 states, 38 states have (on average 3.789473684210526) internal successors, (144), 36 states have internal predecessors, (144), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:01,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:58:01,012 INFO L93 Difference]: Finished difference Result 1106 states and 1221 transitions. [2021-10-28 22:58:01,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 22:58:01,012 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.789473684210526) internal successors, (144), 36 states have internal predecessors, (144), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-10-28 22:58:01,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:58:01,015 INFO L225 Difference]: With dead ends: 1106 [2021-10-28 22:58:01,015 INFO L226 Difference]: Without dead ends: 630 [2021-10-28 22:58:01,015 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 33.2s TimeCoverageRelationStatistics Valid=248, Invalid=3174, Unknown=0, NotChecked=0, Total=3422 [2021-10-28 22:58:01,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-10-28 22:58:01,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 624. [2021-10-28 22:58:01,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 614 states have (on average 1.1140065146579805) internal successors, (684), 614 states have internal predecessors, (684), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:01,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 693 transitions. [2021-10-28 22:58:01,033 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 693 transitions. Word has length 82 [2021-10-28 22:58:01,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:58:01,034 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 693 transitions. [2021-10-28 22:58:01,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.789473684210526) internal successors, (144), 36 states have internal predecessors, (144), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:01,034 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 693 transitions. [2021-10-28 22:58:01,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-28 22:58:01,036 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:58:01,037 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:58:01,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-28 22:58:01,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-28 22:58:01,264 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:58:01,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:58:01,264 INFO L85 PathProgramCache]: Analyzing trace with hash -958830397, now seen corresponding path program 10 times [2021-10-28 22:58:01,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:58:01,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144389937] [2021-10-28 22:58:01,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:58:01,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:58:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:01,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:58:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:01,559 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 32 proven. 124 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:58:01,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:58:01,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144389937] [2021-10-28 22:58:01,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144389937] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:58:01,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946924278] [2021-10-28 22:58:01,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 22:58:01,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:58:01,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:58:01,577 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:58:01,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-28 22:58:02,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 22:58:02,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:58:02,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-28 22:58:02,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:58:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 50 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:58:03,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946924278] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:58:03,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:58:03,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 28 [2021-10-28 22:58:03,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646485365] [2021-10-28 22:58:03,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 22:58:03,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:58:03,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 22:58:03,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-10-28 22:58:03,464 INFO L87 Difference]: Start difference. First operand 624 states and 693 transitions. Second operand has 29 states, 28 states have (on average 4.285714285714286) internal successors, (120), 26 states have internal predecessors, (120), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:04,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:58:04,460 INFO L93 Difference]: Finished difference Result 737 states and 817 transitions. [2021-10-28 22:58:04,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 22:58:04,460 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.285714285714286) internal successors, (120), 26 states have internal predecessors, (120), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2021-10-28 22:58:04,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:58:04,464 INFO L225 Difference]: With dead ends: 737 [2021-10-28 22:58:04,464 INFO L226 Difference]: Without dead ends: 737 [2021-10-28 22:58:04,464 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 22:58:04,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-10-28 22:58:04,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 723. [2021-10-28 22:58:04,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 713 states have (on average 1.1136044880785414) internal successors, (794), 713 states have internal predecessors, (794), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:04,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 803 transitions. [2021-10-28 22:58:04,483 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 803 transitions. Word has length 86 [2021-10-28 22:58:04,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:58:04,484 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 803 transitions. [2021-10-28 22:58:04,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.285714285714286) internal successors, (120), 26 states have internal predecessors, (120), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:04,485 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 803 transitions. [2021-10-28 22:58:04,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-28 22:58:04,487 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:58:04,487 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:58:04,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-28 22:58:04,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-28 22:58:04,708 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:58:04,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:58:04,708 INFO L85 PathProgramCache]: Analyzing trace with hash 305055117, now seen corresponding path program 11 times [2021-10-28 22:58:04,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:58:04,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642620921] [2021-10-28 22:58:04,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:58:04,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:58:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:05,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:58:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 32 proven. 166 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:58:05,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:58:05,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642620921] [2021-10-28 22:58:05,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642620921] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:58:05,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719293376] [2021-10-28 22:58:05,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 22:58:05,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:58:05,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:58:05,295 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:58:05,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-28 22:58:06,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-28 22:58:06,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:58:06,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 96 conjunts are in the unsatisfiable core [2021-10-28 22:58:06,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:58:06,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 22:58:07,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 22:58:07,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-10-28 22:58:10,142 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-28 22:58:10,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 34 [2021-10-28 22:58:10,165 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 32 proven. 166 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:58:10,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719293376] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:58:10,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:58:10,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-10-28 22:58:10,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461900176] [2021-10-28 22:58:10,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-28 22:58:10,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:58:10,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-28 22:58:10,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1870, Unknown=0, NotChecked=0, Total=1980 [2021-10-28 22:58:10,167 INFO L87 Difference]: Start difference. First operand 723 states and 803 transitions. Second operand has 45 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 42 states have internal predecessors, (168), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:13,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:58:13,496 INFO L93 Difference]: Finished difference Result 1312 states and 1449 transitions. [2021-10-28 22:58:13,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-28 22:58:13,496 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 42 states have internal predecessors, (168), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-10-28 22:58:13,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:58:13,499 INFO L225 Difference]: With dead ends: 1312 [2021-10-28 22:58:13,499 INFO L226 Difference]: Without dead ends: 737 [2021-10-28 22:58:13,500 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=289, Invalid=4267, Unknown=0, NotChecked=0, Total=4556 [2021-10-28 22:58:13,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-10-28 22:58:13,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 731. [2021-10-28 22:58:13,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 721 states have (on average 1.1123439667128987) internal successors, (802), 721 states have internal predecessors, (802), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:13,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 811 transitions. [2021-10-28 22:58:13,517 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 811 transitions. Word has length 94 [2021-10-28 22:58:13,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:58:13,517 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 811 transitions. [2021-10-28 22:58:13,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 42 states have internal predecessors, (168), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:13,517 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 811 transitions. [2021-10-28 22:58:13,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-28 22:58:13,519 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:58:13,520 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:58:13,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-28 22:58:13,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:58:13,740 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:58:13,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:58:13,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1697687338, now seen corresponding path program 12 times [2021-10-28 22:58:13,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:58:13,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900349033] [2021-10-28 22:58:13,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:58:13,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:58:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:14,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:58:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:14,180 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 50 proven. 173 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:58:14,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:58:14,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900349033] [2021-10-28 22:58:14,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900349033] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:58:14,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787661615] [2021-10-28 22:58:14,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 22:58:14,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:58:14,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:58:14,231 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:58:14,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-28 22:58:15,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-10-28 22:58:15,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:58:15,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-28 22:58:15,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:58:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 72 proven. 151 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:58:16,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787661615] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:58:16,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:58:16,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 38 [2021-10-28 22:58:16,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746678334] [2021-10-28 22:58:16,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-28 22:58:16,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:58:16,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-28 22:58:16,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 22:58:16,508 INFO L87 Difference]: Start difference. First operand 731 states and 811 transitions. Second operand has 39 states, 38 states have (on average 4.842105263157895) internal successors, (184), 36 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:17,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:58:17,760 INFO L93 Difference]: Finished difference Result 844 states and 935 transitions. [2021-10-28 22:58:17,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 22:58:17,761 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 4.842105263157895) internal successors, (184), 36 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2021-10-28 22:58:17,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:58:17,764 INFO L225 Difference]: With dead ends: 844 [2021-10-28 22:58:17,764 INFO L226 Difference]: Without dead ends: 844 [2021-10-28 22:58:17,765 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=378, Invalid=2592, Unknown=0, NotChecked=0, Total=2970 [2021-10-28 22:58:17,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-10-28 22:58:17,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 830. [2021-10-28 22:58:17,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 820 states have (on average 1.1121951219512196) internal successors, (912), 820 states have internal predecessors, (912), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:17,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 921 transitions. [2021-10-28 22:58:17,783 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 921 transitions. Word has length 98 [2021-10-28 22:58:17,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:58:17,783 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 921 transitions. [2021-10-28 22:58:17,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 4.842105263157895) internal successors, (184), 36 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:17,784 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 921 transitions. [2021-10-28 22:58:17,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-28 22:58:17,786 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:58:17,786 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:58:17,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-28 22:58:18,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:58:18,000 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:58:18,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:58:18,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1544508172, now seen corresponding path program 13 times [2021-10-28 22:58:18,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:58:18,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718753893] [2021-10-28 22:58:18,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:58:18,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:58:18,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:18,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:58:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 38 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:58:18,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:58:18,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718753893] [2021-10-28 22:58:18,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718753893] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:58:18,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496198363] [2021-10-28 22:58:18,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 22:58:18,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:58:18,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:58:18,676 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:58:18,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-28 22:58:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:20,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 91 conjunts are in the unsatisfiable core [2021-10-28 22:58:20,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:58:20,107 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 22:58:20,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 22:58:20,709 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:58:20,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-10-28 22:58:21,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 22:58:21,098 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-28 22:58:21,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-10-28 22:58:24,303 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-10-28 22:58:24,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 32 [2021-10-28 22:58:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 38 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:58:24,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496198363] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:58:24,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:58:24,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 50 [2021-10-28 22:58:24,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97774736] [2021-10-28 22:58:24,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-10-28 22:58:24,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:58:24,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-10-28 22:58:24,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2319, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 22:58:24,326 INFO L87 Difference]: Start difference. First operand 830 states and 921 transitions. Second operand has 50 states, 49 states have (on average 3.938775510204082) internal successors, (193), 47 states have internal predecessors, (193), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:38,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:58:38,669 INFO L93 Difference]: Finished difference Result 1524 states and 1683 transitions. [2021-10-28 22:58:38,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-28 22:58:38,670 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.938775510204082) internal successors, (193), 47 states have internal predecessors, (193), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2021-10-28 22:58:38,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:58:38,674 INFO L225 Difference]: With dead ends: 1524 [2021-10-28 22:58:38,674 INFO L226 Difference]: Without dead ends: 847 [2021-10-28 22:58:38,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=422, Invalid=7586, Unknown=2, NotChecked=0, Total=8010 [2021-10-28 22:58:38,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-10-28 22:58:38,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 838. [2021-10-28 22:58:38,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 828 states have (on average 1.1111111111111112) internal successors, (920), 828 states have internal predecessors, (920), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:38,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 929 transitions. [2021-10-28 22:58:38,691 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 929 transitions. Word has length 106 [2021-10-28 22:58:38,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:58:38,691 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 929 transitions. [2021-10-28 22:58:38,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.938775510204082) internal successors, (193), 47 states have internal predecessors, (193), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:38,692 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 929 transitions. [2021-10-28 22:58:38,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-10-28 22:58:38,695 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:58:38,695 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:58:38,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-28 22:58:38,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:58:38,920 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:58:38,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:58:38,920 INFO L85 PathProgramCache]: Analyzing trace with hash -326890735, now seen corresponding path program 14 times [2021-10-28 22:58:38,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:58:38,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085644084] [2021-10-28 22:58:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:58:38,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:58:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:39,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:58:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 72 proven. 230 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:58:39,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:58:39,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085644084] [2021-10-28 22:58:39,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085644084] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:58:39,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377694324] [2021-10-28 22:58:39,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:58:39,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:58:39,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:58:39,407 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:58:39,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-28 22:58:41,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:58:41,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:58:41,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 79 conjunts are in the unsatisfiable core [2021-10-28 22:58:41,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:58:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 91 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:58:41,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377694324] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:58:41,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:58:41,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 35 [2021-10-28 22:58:41,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069498970] [2021-10-28 22:58:41,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-28 22:58:41,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:58:41,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-28 22:58:41,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 22:58:41,924 INFO L87 Difference]: Start difference. First operand 838 states and 929 transitions. Second operand has 36 states, 35 states have (on average 4.3428571428571425) internal successors, (152), 33 states have internal predecessors, (152), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:43,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:58:43,154 INFO L93 Difference]: Finished difference Result 951 states and 1053 transitions. [2021-10-28 22:58:43,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 22:58:43,155 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.3428571428571425) internal successors, (152), 33 states have internal predecessors, (152), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2021-10-28 22:58:43,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:58:43,158 INFO L225 Difference]: With dead ends: 951 [2021-10-28 22:58:43,159 INFO L226 Difference]: Without dead ends: 951 [2021-10-28 22:58:43,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=276, Invalid=2076, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 22:58:43,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-10-28 22:58:43,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 937. [2021-10-28 22:58:43,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 927 states have (on average 1.1111111111111112) internal successors, (1030), 927 states have internal predecessors, (1030), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:43,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1039 transitions. [2021-10-28 22:58:43,179 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1039 transitions. Word has length 110 [2021-10-28 22:58:43,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:58:43,179 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 1039 transitions. [2021-10-28 22:58:43,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.3428571428571425) internal successors, (152), 33 states have internal predecessors, (152), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:43,180 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1039 transitions. [2021-10-28 22:58:43,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-28 22:58:43,182 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:58:43,183 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:58:43,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-28 22:58:43,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-10-28 22:58:43,408 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:58:43,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:58:43,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1760639451, now seen corresponding path program 15 times [2021-10-28 22:58:43,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:58:43,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329964241] [2021-10-28 22:58:43,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:58:43,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:58:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:44,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:58:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 44 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:58:44,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:58:44,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329964241] [2021-10-28 22:58:44,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329964241] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:58:44,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255327440] [2021-10-28 22:58:44,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 22:58:44,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:58:44,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:58:44,128 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:58:44,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-28 22:58:45,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-28 22:58:45,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:58:45,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 110 conjunts are in the unsatisfiable core [2021-10-28 22:58:45,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:58:46,024 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 22:58:46,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 22:58:46,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 22:58:47,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-28 22:58:47,615 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-10-28 22:58:47,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-28 22:58:49,877 INFO L354 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-10-28 22:58:49,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 33 [2021-10-28 22:58:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 44 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:58:49,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255327440] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:58:49,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:58:49,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 52 [2021-10-28 22:58:49,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779979066] [2021-10-28 22:58:49,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-28 22:58:49,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:58:49,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-28 22:58:49,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2518, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 22:58:49,899 INFO L87 Difference]: Start difference. First operand 937 states and 1039 transitions. Second operand has 52 states, 51 states have (on average 4.254901960784314) internal successors, (217), 49 states have internal predecessors, (217), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:54,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:58:54,310 INFO L93 Difference]: Finished difference Result 1791 states and 1971 transitions. [2021-10-28 22:58:54,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-10-28 22:58:54,311 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 4.254901960784314) internal successors, (217), 49 states have internal predecessors, (217), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2021-10-28 22:58:54,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:58:54,320 INFO L225 Difference]: With dead ends: 1791 [2021-10-28 22:58:54,320 INFO L226 Difference]: Without dead ends: 954 [2021-10-28 22:58:54,322 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2852 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=543, Invalid=10799, Unknown=0, NotChecked=0, Total=11342 [2021-10-28 22:58:54,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-10-28 22:58:54,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 945. [2021-10-28 22:58:54,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 935 states have (on average 1.1101604278074866) internal successors, (1038), 935 states have internal predecessors, (1038), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:54,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1047 transitions. [2021-10-28 22:58:54,347 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1047 transitions. Word has length 118 [2021-10-28 22:58:54,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:58:54,348 INFO L470 AbstractCegarLoop]: Abstraction has 945 states and 1047 transitions. [2021-10-28 22:58:54,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 4.254901960784314) internal successors, (217), 49 states have internal predecessors, (217), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:54,348 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1047 transitions. [2021-10-28 22:58:54,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-28 22:58:54,350 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:58:54,351 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:58:54,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-28 22:58:54,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-10-28 22:58:54,576 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:58:54,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:58:54,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1908452232, now seen corresponding path program 16 times [2021-10-28 22:58:54,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:58:54,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770269952] [2021-10-28 22:58:54,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:58:54,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:58:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:55,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:58:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 98 proven. 295 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:58:55,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:58:55,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770269952] [2021-10-28 22:58:55,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770269952] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:58:55,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925368297] [2021-10-28 22:58:55,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 22:58:55,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:58:55,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:58:55,140 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:58:55,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-28 22:58:57,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 22:58:57,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:58:57,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 87 conjunts are in the unsatisfiable core [2021-10-28 22:58:57,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:58:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 128 proven. 265 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:58:57,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925368297] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:58:57,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:58:57,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 37 [2021-10-28 22:58:57,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193138664] [2021-10-28 22:58:57,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-28 22:58:57,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:58:57,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-28 22:58:57,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 22:58:57,816 INFO L87 Difference]: Start difference. First operand 945 states and 1047 transitions. Second operand has 38 states, 37 states have (on average 4.54054054054054) internal successors, (168), 35 states have internal predecessors, (168), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:58,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:58:58,978 INFO L93 Difference]: Finished difference Result 1058 states and 1171 transitions. [2021-10-28 22:58:58,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-28 22:58:58,979 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 4.54054054054054) internal successors, (168), 35 states have internal predecessors, (168), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2021-10-28 22:58:58,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:58:58,983 INFO L225 Difference]: With dead ends: 1058 [2021-10-28 22:58:58,983 INFO L226 Difference]: Without dead ends: 1058 [2021-10-28 22:58:58,983 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=293, Invalid=2257, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 22:58:58,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-10-28 22:58:59,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1044. [2021-10-28 22:58:59,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1034 states have (on average 1.1102514506769825) internal successors, (1148), 1034 states have internal predecessors, (1148), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:59,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 1157 transitions. [2021-10-28 22:58:59,005 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 1157 transitions. Word has length 122 [2021-10-28 22:58:59,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:58:59,005 INFO L470 AbstractCegarLoop]: Abstraction has 1044 states and 1157 transitions. [2021-10-28 22:58:59,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 4.54054054054054) internal successors, (168), 35 states have internal predecessors, (168), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:58:59,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 1157 transitions. [2021-10-28 22:58:59,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-10-28 22:58:59,009 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:58:59,009 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:58:59,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-28 22:58:59,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-10-28 22:58:59,236 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:58:59,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:58:59,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1255943234, now seen corresponding path program 17 times [2021-10-28 22:58:59,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:58:59,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663368148] [2021-10-28 22:58:59,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:58:59,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:58:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:59,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:58:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 50 proven. 409 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:58:59,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:58:59,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663368148] [2021-10-28 22:58:59,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663368148] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:58:59,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410161330] [2021-10-28 22:58:59,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 22:58:59,986 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:58:59,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:58:59,987 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:58:59,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-28 22:59:01,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-10-28 22:59:01,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:59:01,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 143 conjunts are in the unsatisfiable core [2021-10-28 22:59:01,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:59:02,567 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 [2021-10-28 22:59:02,644 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-28 22:59:02,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-10-28 22:59:05,494 INFO L354 Elim1Store]: treesize reduction 35, result has 18.6 percent of original size [2021-10-28 22:59:05,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 27 [2021-10-28 22:59:05,511 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 50 proven. 409 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:59:05,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410161330] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:59:05,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:59:05,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 37] total 63 [2021-10-28 22:59:05,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677391565] [2021-10-28 22:59:05,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-10-28 22:59:05,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:59:05,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-10-28 22:59:05,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3755, Unknown=0, NotChecked=0, Total=3906 [2021-10-28 22:59:05,513 INFO L87 Difference]: Start difference. First operand 1044 states and 1157 transitions. Second operand has 63 states, 62 states have (on average 3.870967741935484) internal successors, (240), 60 states have internal predecessors, (240), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:59:11,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:59:11,479 INFO L93 Difference]: Finished difference Result 2504 states and 2769 transitions. [2021-10-28 22:59:11,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-10-28 22:59:11,480 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 3.870967741935484) internal successors, (240), 60 states have internal predecessors, (240), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2021-10-28 22:59:11,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:59:11,484 INFO L225 Difference]: With dead ends: 2504 [2021-10-28 22:59:11,484 INFO L226 Difference]: Without dead ends: 1058 [2021-10-28 22:59:11,485 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2831 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=572, Invalid=12768, Unknown=0, NotChecked=0, Total=13340 [2021-10-28 22:59:11,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-10-28 22:59:11,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1052. [2021-10-28 22:59:11,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1042 states have (on average 1.109404990403071) internal successors, (1156), 1042 states have internal predecessors, (1156), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:59:11,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1165 transitions. [2021-10-28 22:59:11,498 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1165 transitions. Word has length 130 [2021-10-28 22:59:11,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:59:11,499 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 1165 transitions. [2021-10-28 22:59:11,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 3.870967741935484) internal successors, (240), 60 states have internal predecessors, (240), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:59:11,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1165 transitions. [2021-10-28 22:59:11,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-10-28 22:59:11,502 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:59:11,502 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:59:11,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-28 22:59:11,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-28 22:59:11,721 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:59:11,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:59:11,721 INFO L85 PathProgramCache]: Analyzing trace with hash -2144451745, now seen corresponding path program 18 times [2021-10-28 22:59:11,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:59:11,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348235889] [2021-10-28 22:59:11,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:59:11,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:59:11,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:59:12,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:59:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:59:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 128 proven. 368 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:59:12,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:59:12,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348235889] [2021-10-28 22:59:12,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348235889] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:59:12,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104111362] [2021-10-28 22:59:12,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 22:59:12,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:59:12,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:59:12,175 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:59:12,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-28 22:59:14,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-10-28 22:59:14,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:59:14,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 78 conjunts are in the unsatisfiable core [2021-10-28 22:59:14,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:59:15,180 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 162 proven. 334 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:59:15,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104111362] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:59:15,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:59:15,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 50 [2021-10-28 22:59:15,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882845895] [2021-10-28 22:59:15,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-28 22:59:15,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:59:15,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-28 22:59:15,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=2212, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 22:59:15,182 INFO L87 Difference]: Start difference. First operand 1052 states and 1165 transitions. Second operand has 51 states, 50 states have (on average 5.12) internal successors, (256), 48 states have internal predecessors, (256), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:59:16,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:59:16,803 INFO L93 Difference]: Finished difference Result 1165 states and 1289 transitions. [2021-10-28 22:59:16,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-28 22:59:16,803 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 5.12) internal successors, (256), 48 states have internal predecessors, (256), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2021-10-28 22:59:16,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:59:16,807 INFO L225 Difference]: With dead ends: 1165 [2021-10-28 22:59:16,807 INFO L226 Difference]: Without dead ends: 1165 [2021-10-28 22:59:16,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=633, Invalid=4623, Unknown=0, NotChecked=0, Total=5256 [2021-10-28 22:59:16,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-10-28 22:59:16,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1151. [2021-10-28 22:59:16,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1141 states have (on average 1.1095530236634532) internal successors, (1266), 1141 states have internal predecessors, (1266), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:59:16,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1275 transitions. [2021-10-28 22:59:16,828 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1275 transitions. Word has length 134 [2021-10-28 22:59:16,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:59:16,828 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 1275 transitions. [2021-10-28 22:59:16,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 5.12) internal successors, (256), 48 states have internal predecessors, (256), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:59:16,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1275 transitions. [2021-10-28 22:59:16,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-10-28 22:59:16,831 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:59:16,831 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:59:16,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-28 22:59:17,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-28 22:59:17,056 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 22:59:17,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:59:17,056 INFO L85 PathProgramCache]: Analyzing trace with hash -675462103, now seen corresponding path program 19 times [2021-10-28 22:59:17,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:59:17,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618956974] [2021-10-28 22:59:17,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:59:17,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:59:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:59:17,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:59:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:59:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 56 proven. 514 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:59:17,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:59:17,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618956974] [2021-10-28 22:59:17,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618956974] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:59:17,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244463037] [2021-10-28 22:59:17,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 22:59:17,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:59:17,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:59:17,939 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:59:17,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-28 22:59:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:59:20,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 120 conjunts are in the unsatisfiable core [2021-10-28 22:59:20,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:59:20,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 22:59:20,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 22:59:20,761 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-28 22:59:20,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-28 22:59:23,349 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-28 22:59:23,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-10-28 22:59:23,366 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 56 proven. 514 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:59:23,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244463037] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:59:23,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:59:23,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 59 [2021-10-28 22:59:23,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305928536] [2021-10-28 22:59:23,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-10-28 22:59:23,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:59:23,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-10-28 22:59:23,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=3279, Unknown=0, NotChecked=0, Total=3422 [2021-10-28 22:59:23,368 INFO L87 Difference]: Start difference. First operand 1151 states and 1275 transitions. Second operand has 59 states, 58 states have (on average 4.551724137931035) internal successors, (264), 56 states have internal predecessors, (264), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:00:20,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:00:20,034 INFO L93 Difference]: Finished difference Result 2136 states and 2361 transitions. [2021-10-28 23:00:20,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-28 23:00:20,035 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 4.551724137931035) internal successors, (264), 56 states have internal predecessors, (264), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2021-10-28 23:00:20,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:00:20,039 INFO L225 Difference]: With dead ends: 2136 [2021-10-28 23:00:20,039 INFO L226 Difference]: Without dead ends: 1165 [2021-10-28 23:00:20,040 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 54.1s TimeCoverageRelationStatistics Valid=363, Invalid=7469, Unknown=0, NotChecked=0, Total=7832 [2021-10-28 23:00:20,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-10-28 23:00:20,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1159. [2021-10-28 23:00:20,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1149 states have (on average 1.1087902523933855) internal successors, (1274), 1149 states have internal predecessors, (1274), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:00:20,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1283 transitions. [2021-10-28 23:00:20,056 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1283 transitions. Word has length 142 [2021-10-28 23:00:20,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:00:20,056 INFO L470 AbstractCegarLoop]: Abstraction has 1159 states and 1283 transitions. [2021-10-28 23:00:20,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 4.551724137931035) internal successors, (264), 56 states have internal predecessors, (264), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:00:20,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1283 transitions. [2021-10-28 23:00:20,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-10-28 23:00:20,060 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:00:20,060 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:00:20,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-28 23:00:20,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:00:20,283 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 23:00:20,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:00:20,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1820104646, now seen corresponding path program 20 times [2021-10-28 23:00:20,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:00:20,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15391121] [2021-10-28 23:00:20,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:00:20,284 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:00:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:00:20,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:00:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:00:20,856 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 162 proven. 449 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:00:20,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:00:20,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15391121] [2021-10-28 23:00:20,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15391121] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:00:20,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613192122] [2021-10-28 23:00:20,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:00:20,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:00:20,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:00:20,858 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:00:20,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-28 23:00:23,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:00:23,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:00:23,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 106 conjunts are in the unsatisfiable core [2021-10-28 23:00:23,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:00:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 190 proven. 421 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:00:24,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613192122] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:00:24,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:00:24,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 44 [2021-10-28 23:00:24,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957130704] [2021-10-28 23:00:24,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-28 23:00:24,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:00:24,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-28 23:00:24,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1723, Unknown=0, NotChecked=0, Total=1980 [2021-10-28 23:00:24,273 INFO L87 Difference]: Start difference. First operand 1159 states and 1283 transitions. Second operand has 45 states, 44 states have (on average 4.545454545454546) internal successors, (200), 42 states have internal predecessors, (200), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:00:25,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:00:25,945 INFO L93 Difference]: Finished difference Result 1272 states and 1407 transitions. [2021-10-28 23:00:25,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 23:00:25,945 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 4.545454545454546) internal successors, (200), 42 states have internal predecessors, (200), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2021-10-28 23:00:25,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:00:25,952 INFO L225 Difference]: With dead ends: 1272 [2021-10-28 23:00:25,952 INFO L226 Difference]: Without dead ends: 1272 [2021-10-28 23:00:25,953 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=408, Invalid=3252, Unknown=0, NotChecked=0, Total=3660 [2021-10-28 23:00:25,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-10-28 23:00:25,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1258. [2021-10-28 23:00:25,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1248 states have (on average 1.108974358974359) internal successors, (1384), 1248 states have internal predecessors, (1384), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:00:25,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1393 transitions. [2021-10-28 23:00:25,977 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1393 transitions. Word has length 146 [2021-10-28 23:00:25,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:00:25,978 INFO L470 AbstractCegarLoop]: Abstraction has 1258 states and 1393 transitions. [2021-10-28 23:00:25,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 4.545454545454546) internal successors, (200), 42 states have internal predecessors, (200), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:00:25,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1393 transitions. [2021-10-28 23:00:25,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-10-28 23:00:25,981 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:00:25,981 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:00:26,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-28 23:00:26,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:00:26,196 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 23:00:26,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:00:26,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1308606064, now seen corresponding path program 21 times [2021-10-28 23:00:26,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:00:26,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675811670] [2021-10-28 23:00:26,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:00:26,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:00:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:00:27,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:00:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:00:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 62 proven. 631 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:00:27,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:00:27,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675811670] [2021-10-28 23:00:27,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675811670] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:00:27,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328586042] [2021-10-28 23:00:27,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:00:27,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:00:27,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:00:27,213 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:00:27,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-28 23:00:29,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-10-28 23:00:29,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:00:29,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 163 conjunts are in the unsatisfiable core [2021-10-28 23:00:29,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:00:30,026 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 23:00:30,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 23:00:32,282 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 30 treesize of output 26 [2021-10-28 23:00:32,436 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-10-28 23:00:32,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-10-28 23:00:38,175 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:00:38,175 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 54 treesize of output 50 [2021-10-28 23:00:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 62 proven. 631 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:00:38,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328586042] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:00:38,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:00:38,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-10-28 23:00:38,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672405423] [2021-10-28 23:00:38,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-10-28 23:00:38,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:00:38,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-10-28 23:00:38,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=4124, Unknown=0, NotChecked=0, Total=4290 [2021-10-28 23:00:38,459 INFO L87 Difference]: Start difference. First operand 1258 states and 1393 transitions. Second operand has 66 states, 65 states have (on average 4.476923076923077) internal successors, (291), 63 states have internal predecessors, (291), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:00:47,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:00:47,217 INFO L93 Difference]: Finished difference Result 2433 states and 2679 transitions. [2021-10-28 23:00:47,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-10-28 23:00:47,217 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 4.476923076923077) internal successors, (291), 63 states have internal predecessors, (291), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2021-10-28 23:00:47,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:00:47,223 INFO L225 Difference]: With dead ends: 2433 [2021-10-28 23:00:47,223 INFO L226 Difference]: Without dead ends: 1275 [2021-10-28 23:00:47,224 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4709 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=677, Invalid=17683, Unknown=0, NotChecked=0, Total=18360 [2021-10-28 23:00:47,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-10-28 23:00:47,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1266. [2021-10-28 23:00:47,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1256 states have (on average 1.10828025477707) internal successors, (1392), 1256 states have internal predecessors, (1392), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:00:47,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1401 transitions. [2021-10-28 23:00:47,247 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1401 transitions. Word has length 154 [2021-10-28 23:00:47,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:00:47,247 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 1401 transitions. [2021-10-28 23:00:47,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 4.476923076923077) internal successors, (291), 63 states have internal predecessors, (291), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:00:47,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1401 transitions. [2021-10-28 23:00:47,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-10-28 23:00:47,250 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:00:47,250 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:00:47,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-28 23:00:47,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-28 23:00:47,476 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 23:00:47,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:00:47,476 INFO L85 PathProgramCache]: Analyzing trace with hash -508161619, now seen corresponding path program 22 times [2021-10-28 23:00:47,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:00:47,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981955969] [2021-10-28 23:00:47,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:00:47,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:00:47,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:00:48,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:00:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:00:48,361 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 200 proven. 538 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:00:48,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:00:48,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981955969] [2021-10-28 23:00:48,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981955969] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:00:48,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966711482] [2021-10-28 23:00:48,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:00:48,362 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:00:48,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:00:48,364 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:00:48,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-28 23:00:51,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:00:51,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:00:51,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 114 conjunts are in the unsatisfiable core [2021-10-28 23:00:51,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:00:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 242 proven. 496 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:00:52,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966711482] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:00:52,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:00:52,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 46 [2021-10-28 23:00:52,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839424124] [2021-10-28 23:00:52,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-10-28 23:00:52,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:00:52,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-10-28 23:00:52,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1868, Unknown=0, NotChecked=0, Total=2162 [2021-10-28 23:00:52,471 INFO L87 Difference]: Start difference. First operand 1266 states and 1401 transitions. Second operand has 47 states, 46 states have (on average 4.695652173913044) internal successors, (216), 44 states have internal predecessors, (216), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:00:54,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:00:54,634 INFO L93 Difference]: Finished difference Result 1379 states and 1525 transitions. [2021-10-28 23:00:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-28 23:00:54,635 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 4.695652173913044) internal successors, (216), 44 states have internal predecessors, (216), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2021-10-28 23:00:54,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:00:54,641 INFO L225 Difference]: With dead ends: 1379 [2021-10-28 23:00:54,641 INFO L226 Difference]: Without dead ends: 1379 [2021-10-28 23:00:54,642 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=428, Invalid=3478, Unknown=0, NotChecked=0, Total=3906 [2021-10-28 23:00:54,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2021-10-28 23:00:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1365. [2021-10-28 23:00:54,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1355 states have (on average 1.1084870848708488) internal successors, (1502), 1355 states have internal predecessors, (1502), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:00:54,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 1511 transitions. [2021-10-28 23:00:54,666 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 1511 transitions. Word has length 158 [2021-10-28 23:00:54,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:00:54,667 INFO L470 AbstractCegarLoop]: Abstraction has 1365 states and 1511 transitions. [2021-10-28 23:00:54,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 4.695652173913044) internal successors, (216), 44 states have internal predecessors, (216), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:00:54,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 1511 transitions. [2021-10-28 23:00:54,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-10-28 23:00:54,670 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:00:54,671 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:00:54,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-28 23:00:54,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:00:54,896 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 23:00:54,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:00:54,897 INFO L85 PathProgramCache]: Analyzing trace with hash 7398519, now seen corresponding path program 23 times [2021-10-28 23:00:54,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:00:54,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972947393] [2021-10-28 23:00:54,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:00:54,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:00:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:00:56,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:00:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:00:56,159 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 68 proven. 760 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:00:56,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:00:56,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972947393] [2021-10-28 23:00:56,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972947393] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:00:56,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496784257] [2021-10-28 23:00:56,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:00:56,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:00:56,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:00:56,161 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:00:56,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-28 23:00:59,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-10-28 23:00:59,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:00:59,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 139 conjunts are in the unsatisfiable core [2021-10-28 23:00:59,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:00:59,340 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 23:00:59,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 23:01:01,196 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 [2021-10-28 23:01:01,284 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-10-28 23:01:01,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-10-28 23:01:04,790 INFO L354 Elim1Store]: treesize reduction 47, result has 17.5 percent of original size [2021-10-28 23:01:04,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-10-28 23:01:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 242 proven. 586 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:01:05,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496784257] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:01:05,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:01:05,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 71 [2021-10-28 23:01:05,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932895462] [2021-10-28 23:01:05,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-10-28 23:01:05,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:01:05,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-10-28 23:01:05,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=4731, Unknown=0, NotChecked=0, Total=4970 [2021-10-28 23:01:05,331 INFO L87 Difference]: Start difference. First operand 1365 states and 1511 transitions. Second operand has 71 states, 70 states have (on average 4.585714285714285) internal successors, (321), 68 states have internal predecessors, (321), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:01:20,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:01:20,755 INFO L93 Difference]: Finished difference Result 2757 states and 3025 transitions. [2021-10-28 23:01:20,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-10-28 23:01:20,755 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 4.585714285714285) internal successors, (321), 68 states have internal predecessors, (321), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2021-10-28 23:01:20,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:01:20,762 INFO L225 Difference]: With dead ends: 2757 [2021-10-28 23:01:20,762 INFO L226 Difference]: Without dead ends: 1492 [2021-10-28 23:01:20,763 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6587 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=1216, Invalid=27176, Unknown=0, NotChecked=0, Total=28392 [2021-10-28 23:01:20,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-10-28 23:01:20,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1385. [2021-10-28 23:01:20,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1374 states have (on average 1.1069868995633187) internal successors, (1521), 1374 states have internal predecessors, (1521), 9 states have call successors, (9), 9 states have call predecessors, (9), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:01:20,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 1531 transitions. [2021-10-28 23:01:20,781 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 1531 transitions. Word has length 166 [2021-10-28 23:01:20,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:01:20,782 INFO L470 AbstractCegarLoop]: Abstraction has 1385 states and 1531 transitions. [2021-10-28 23:01:20,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 4.585714285714285) internal successors, (321), 68 states have internal predecessors, (321), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:01:20,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 1531 transitions. [2021-10-28 23:01:20,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-10-28 23:01:20,786 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:01:20,786 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:01:20,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-28 23:01:21,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-10-28 23:01:21,012 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 23:01:21,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:01:21,013 INFO L85 PathProgramCache]: Analyzing trace with hash -528625514, now seen corresponding path program 3 times [2021-10-28 23:01:21,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:01:21,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847094975] [2021-10-28 23:01:21,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:01:21,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:01:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:21,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:01:21,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:01:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 242 proven. 635 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:01:21,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:01:21,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847094975] [2021-10-28 23:01:21,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847094975] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:01:21,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999291841] [2021-10-28 23:01:21,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:01:21,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:01:21,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:01:21,950 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:01:21,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-28 23:01:26,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-10-28 23:01:26,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:01:26,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 78 conjunts are in the unsatisfiable core [2021-10-28 23:01:26,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:01:26,170 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 23:01:26,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 23:01:26,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 23:01:27,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 23:01:27,206 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-10-28 23:01:27,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-10-28 23:01:29,765 INFO L354 Elim1Store]: treesize reduction 45, result has 21.1 percent of original size [2021-10-28 23:01:29,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 32 [2021-10-28 23:01:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 11 proven. 90 refuted. 0 times theorem prover too weak. 777 trivial. 0 not checked. [2021-10-28 23:01:30,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999291841] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:01:30,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:01:30,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 11] total 42 [2021-10-28 23:01:30,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353251887] [2021-10-28 23:01:30,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-28 23:01:30,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:01:30,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-28 23:01:30,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1613, Unknown=0, NotChecked=0, Total=1806 [2021-10-28 23:01:30,048 INFO L87 Difference]: Start difference. First operand 1385 states and 1531 transitions. Second operand has 43 states, 41 states have (on average 4.878048780487805) internal successors, (200), 40 states have internal predecessors, (200), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:01:38,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:01:38,323 INFO L93 Difference]: Finished difference Result 1486 states and 1627 transitions. [2021-10-28 23:01:38,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-28 23:01:38,324 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 4.878048780487805) internal successors, (200), 40 states have internal predecessors, (200), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2021-10-28 23:01:38,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:01:38,324 INFO L225 Difference]: With dead ends: 1486 [2021-10-28 23:01:38,324 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 23:01:38,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=816, Invalid=6840, Unknown=0, NotChecked=0, Total=7656 [2021-10-28 23:01:38,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 23:01:38,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 23:01:38,325 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) [2021-10-28 23:01:38,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 23:01:38,325 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 170 [2021-10-28 23:01:38,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:01:38,326 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 23:01:38,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 4.878048780487805) internal successors, (200), 40 states have internal predecessors, (200), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:01:38,326 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 23:01:38,326 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 23:01:38,328 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr0REQUIRES_VIOLATION [2021-10-28 23:01:38,329 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr1REQUIRES_VIOLATION [2021-10-28 23:01:38,329 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr2REQUIRES_VIOLATION [2021-10-28 23:01:38,329 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr3REQUIRES_VIOLATION [2021-10-28 23:01:38,329 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-28 23:01:38,329 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-28 23:01:38,329 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-28 23:01:38,329 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-28 23:01:38,329 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION [2021-10-28 23:01:38,329 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION [2021-10-28 23:01:38,330 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION [2021-10-28 23:01:38,330 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION [2021-10-28 23:01:38,330 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 23:01:38,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-28 23:01:38,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-10-28 23:01:38,534 INFO L731 BasicCegarLoop]: Path program histogram: [23, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:01:38,537 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:01:38,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:01:38 BoogieIcfgContainer [2021-10-28 23:01:38,541 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:01:38,541 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:01:38,542 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:01:38,542 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:01:38,543 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:55:58" (3/4) ... [2021-10-28 23:01:38,560 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 23:01:38,573 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 23:01:38,573 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrpbrk [2021-10-28 23:01:38,573 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-28 23:01:38,573 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-28 23:01:38,573 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-10-28 23:01:38,573 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-10-28 23:01:38,574 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 23:01:38,574 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-10-28 23:01:38,578 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-10-28 23:01:38,579 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-28 23:01:38,579 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-28 23:01:38,579 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 23:01:38,621 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:01:38,622 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:01:38,623 INFO L168 Benchmark]: Toolchain (without parser) took 341187.99 ms. Allocated memory was 88.1 MB in the beginning and 799.0 MB in the end (delta: 710.9 MB). Free memory was 54.4 MB in the beginning and 138.7 MB in the end (delta: -84.3 MB). Peak memory consumption was 628.7 MB. Max. memory is 16.1 GB. [2021-10-28 23:01:38,623 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 88.1 MB. Free memory is still 42.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:01:38,624 INFO L168 Benchmark]: CACSL2BoogieTranslator took 660.13 ms. Allocated memory is still 88.1 MB. Free memory was 54.2 MB in the beginning and 58.3 MB in the end (delta: -4.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:01:38,624 INFO L168 Benchmark]: Boogie Preprocessor took 68.34 ms. Allocated memory is still 88.1 MB. Free memory was 58.3 MB in the beginning and 55.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:01:38,624 INFO L168 Benchmark]: RCFGBuilder took 784.03 ms. Allocated memory is still 88.1 MB. Free memory was 55.8 MB in the beginning and 36.3 MB in the end (delta: 19.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-28 23:01:38,625 INFO L168 Benchmark]: TraceAbstraction took 339562.72 ms. Allocated memory was 121.6 MB in the beginning and 799.0 MB in the end (delta: 677.4 MB). Free memory was 97.5 MB in the beginning and 141.5 MB in the end (delta: -44.0 MB). Peak memory consumption was 632.3 MB. Max. memory is 16.1 GB. [2021-10-28 23:01:38,625 INFO L168 Benchmark]: Witness Printer took 80.41 ms. Allocated memory is still 799.0 MB. Free memory was 141.5 MB in the beginning and 138.7 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:01:38,627 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 88.1 MB. Free memory is still 42.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 660.13 ms. Allocated memory is still 88.1 MB. Free memory was 54.2 MB in the beginning and 58.3 MB in the end (delta: -4.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 68.34 ms. Allocated memory is still 88.1 MB. Free memory was 58.3 MB in the beginning and 55.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 784.03 ms. Allocated memory is still 88.1 MB. Free memory was 55.8 MB in the beginning and 36.3 MB in the end (delta: 19.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 339562.72 ms. Allocated memory was 121.6 MB in the beginning and 799.0 MB in the end (delta: 677.4 MB). Free memory was 97.5 MB in the beginning and 141.5 MB in the end (delta: -44.0 MB). Peak memory consumption was 632.3 MB. Max. memory is 16.1 GB. * Witness Printer took 80.41 ms. Allocated memory is still 799.0 MB. Free memory was 141.5 MB in the beginning and 138.7 MB in the end (delta: 2.8 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 546]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 546]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: 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 9 procedures, 67 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 339.4s, OverallIterations: 53, TraceHistogramMax: 13, PathProgramHistogramMax: 23, EmptinessCheckTime: 0.1s, AutomataDifference: 195.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2646 SDtfs, 9224 SDslu, 14035 SDs, 0 SdLazy, 86205 SolverSat, 1473 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 49.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5053 GetRequests, 2704 SyntacticMatches, 26 SemanticMatches, 2323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40494 ImplicationChecksByTransitivity, 167.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1385occurred in iteration=52, InterpolantAutomatonStates: 1346, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 53 MinimizatonAttempts, 1118 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 4.2s SatisfiabilityAnalysisTime, 85.1s InterpolantComputationTime, 6644 NumberOfCodeBlocks, 6596 NumberOfCodeBlocksAsserted, 204 NumberOfCheckSat, 6550 ConstructedInterpolants, 755 QuantifiedInterpolants, 84091 SizeOfPredicates, 733 NumberOfNonLiveVariables, 13656 ConjunctsInSsa, 2526 ConjunctsInUnsatCore, 94 InterpolantComputations, 14 PerfectInterpolantSequences, 4320/16412 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 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 23:01:38,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f1af4a-4dae-4774-9dbb-39ba98647aef/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...