./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/lockfree-3.3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39b25c4e2cc4769f7c060343bf6a1efac7abb2b9 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39b25c4e2cc4769f7c060343bf6a1efac7abb2b9 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 01:14:56,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 01:14:56,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 01:14:56,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 01:14:56,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 01:14:56,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 01:14:56,808 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 01:14:56,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 01:14:56,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 01:14:56,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 01:14:56,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 01:14:56,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 01:14:56,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 01:14:56,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 01:14:56,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 01:14:56,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 01:14:56,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 01:14:56,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 01:14:56,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 01:14:56,848 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 01:14:56,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 01:14:56,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 01:14:56,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 01:14:56,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 01:14:56,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 01:14:56,863 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 01:14:56,863 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 01:14:56,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 01:14:56,866 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 01:14:56,867 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 01:14:56,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 01:14:56,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 01:14:56,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 01:14:56,872 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 01:14:56,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 01:14:56,874 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 01:14:56,875 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 01:14:56,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 01:14:56,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 01:14:56,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 01:14:56,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 01:14:56,881 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-13 01:14:56,913 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 01:14:56,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 01:14:56,914 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 01:14:56,915 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 01:14:56,916 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 01:14:56,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 01:14:56,917 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 01:14:56,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 01:14:56,919 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 01:14:56,919 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 01:14:56,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 01:14:56,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 01:14:56,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 01:14:56,921 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 01:14:56,922 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 01:14:56,922 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 01:14:56,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 01:14:56,923 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 01:14:56,924 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 01:14:56,924 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 01:14:56,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 01:14:56,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 01:14:56,926 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 01:14:56,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:14:56,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 01:14:56,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 01:14:56,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 01:14:56,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 01:14:56,929 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 01:14:56,929 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_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39b25c4e2cc4769f7c060343bf6a1efac7abb2b9 [2021-10-13 01:14:57,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 01:14:57,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 01:14:57,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 01:14:57,320 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 01:14:57,322 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 01:14:57,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/memsafety/lockfree-3.3.i [2021-10-13 01:14:57,428 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/data/645af2f9b/f538e7c343054a5790fdda34a75f1ce4/FLAG94ef359fe [2021-10-13 01:14:58,086 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 01:14:58,087 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/sv-benchmarks/c/memsafety/lockfree-3.3.i [2021-10-13 01:14:58,115 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/data/645af2f9b/f538e7c343054a5790fdda34a75f1ce4/FLAG94ef359fe [2021-10-13 01:14:58,341 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/data/645af2f9b/f538e7c343054a5790fdda34a75f1ce4 [2021-10-13 01:14:58,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 01:14:58,348 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 01:14:58,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 01:14:58,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 01:14:58,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 01:14:58,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:14:58" (1/1) ... [2021-10-13 01:14:58,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@592acb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:14:58, skipping insertion in model container [2021-10-13 01:14:58,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:14:58" (1/1) ... [2021-10-13 01:14:58,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 01:14:58,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 01:14:58,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:14:58,964 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 01:14:59,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:14:59,091 INFO L208 MainTranslator]: Completed translation [2021-10-13 01:14:59,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:14:59 WrapperNode [2021-10-13 01:14:59,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 01:14:59,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 01:14:59,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 01:14:59,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 01:14:59,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:14:59" (1/1) ... [2021-10-13 01:14:59,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:14:59" (1/1) ... [2021-10-13 01:14:59,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:14:59" (1/1) ... [2021-10-13 01:14:59,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:14:59" (1/1) ... [2021-10-13 01:14:59,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:14:59" (1/1) ... [2021-10-13 01:14:59,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:14:59" (1/1) ... [2021-10-13 01:14:59,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:14:59" (1/1) ... [2021-10-13 01:14:59,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 01:14:59,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 01:14:59,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 01:14:59,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 01:14:59,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:14:59" (1/1) ... [2021-10-13 01:14:59,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:14:59,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:14:59,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 01:14:59,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 01:14:59,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-13 01:14:59,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 01:14:59,335 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-13 01:14:59,335 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-13 01:14:59,336 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-13 01:14:59,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-13 01:14:59,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-13 01:14:59,338 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-13 01:14:59,338 INFO L138 BoogieDeclarations]: Found implementation of procedure push [2021-10-13 01:14:59,338 INFO L138 BoogieDeclarations]: Found implementation of procedure pop [2021-10-13 01:14:59,338 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-13 01:14:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-13 01:14:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-13 01:14:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-13 01:14:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-13 01:14:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-13 01:14:59,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 01:14:59,341 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-13 01:14:59,341 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-13 01:14:59,341 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-13 01:14:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-13 01:14:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-13 01:14:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-13 01:14:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-13 01:14:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-13 01:14:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-13 01:14:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-13 01:14:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-13 01:14:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-13 01:14:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-13 01:14:59,344 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-13 01:14:59,344 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-13 01:14:59,344 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-13 01:14:59,344 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-13 01:14:59,344 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-13 01:14:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-13 01:14:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-13 01:14:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-13 01:14:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-13 01:14:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-13 01:14:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-13 01:14:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-13 01:14:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-13 01:14:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-13 01:14:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-13 01:14:59,347 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-13 01:14:59,347 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-13 01:14:59,347 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-13 01:14:59,348 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-13 01:14:59,348 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-13 01:14:59,348 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-13 01:14:59,349 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-13 01:14:59,350 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-13 01:14:59,350 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-13 01:14:59,350 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-13 01:14:59,350 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-13 01:14:59,351 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-13 01:14:59,351 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-13 01:14:59,351 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-13 01:14:59,351 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-13 01:14:59,352 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-13 01:14:59,352 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-13 01:14:59,352 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-13 01:14:59,352 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-13 01:14:59,353 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-13 01:14:59,353 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-13 01:14:59,353 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-13 01:14:59,353 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-13 01:14:59,355 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-13 01:14:59,355 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-13 01:14:59,356 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-13 01:14:59,357 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-13 01:14:59,357 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-13 01:14:59,357 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-13 01:14:59,357 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-13 01:14:59,357 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-13 01:14:59,358 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-13 01:14:59,358 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-13 01:14:59,358 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-13 01:14:59,358 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-13 01:14:59,358 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-13 01:14:59,359 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-13 01:14:59,359 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-13 01:14:59,359 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-13 01:14:59,359 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-13 01:14:59,359 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-13 01:14:59,360 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-13 01:14:59,361 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-13 01:14:59,361 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-13 01:14:59,361 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-13 01:14:59,361 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-13 01:14:59,362 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-13 01:14:59,362 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-13 01:14:59,362 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-13 01:14:59,362 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-13 01:14:59,362 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-13 01:14:59,363 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-13 01:14:59,363 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-13 01:14:59,363 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-13 01:14:59,363 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-13 01:14:59,363 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-13 01:14:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-13 01:14:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-13 01:14:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-13 01:14:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-13 01:14:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-13 01:14:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-13 01:14:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-13 01:14:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-13 01:14:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-13 01:14:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-13 01:14:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-13 01:14:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-13 01:14:59,367 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-13 01:14:59,367 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-13 01:14:59,368 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-13 01:14:59,368 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-13 01:14:59,368 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-13 01:14:59,368 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-13 01:14:59,368 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-13 01:14:59,369 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-13 01:14:59,369 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-13 01:14:59,369 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-13 01:14:59,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-13 01:14:59,369 INFO L130 BoogieDeclarations]: Found specification of procedure push [2021-10-13 01:14:59,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 01:14:59,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 01:14:59,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 01:14:59,371 INFO L130 BoogieDeclarations]: Found specification of procedure pop [2021-10-13 01:14:59,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 01:14:59,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 01:14:59,375 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-13 01:14:59,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 01:14:59,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-13 01:14:59,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 01:14:59,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 01:15:00,124 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 01:15:00,125 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-13 01:15:00,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:15:00 BoogieIcfgContainer [2021-10-13 01:15:00,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 01:15:00,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 01:15:00,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 01:15:00,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 01:15:00,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:14:58" (1/3) ... [2021-10-13 01:15:00,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3528c99e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:15:00, skipping insertion in model container [2021-10-13 01:15:00,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:14:59" (2/3) ... [2021-10-13 01:15:00,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3528c99e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:15:00, skipping insertion in model container [2021-10-13 01:15:00,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:15:00" (3/3) ... [2021-10-13 01:15:00,151 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.3.i [2021-10-13 01:15:00,157 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 01:15:00,158 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-13 01:15:00,249 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 01:15:00,256 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 01:15:00,257 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-13 01:15:00,282 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 67 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:15:00,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 01:15:00,291 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:00,292 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:00,293 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:15:00,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:00,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1846299228, now seen corresponding path program 1 times [2021-10-13 01:15:00,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:15:00,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755865193] [2021-10-13 01:15:00,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:00,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:15:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:00,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:15:00,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:15:00,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:15:00,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755865193] [2021-10-13 01:15:00,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755865193] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:15:00,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:15:00,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 01:15:00,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919405404] [2021-10-13 01:15:00,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 01:15:00,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:15:00,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 01:15:00,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 01:15:00,813 INFO L87 Difference]: Start difference. First operand has 74 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 67 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:15:01,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:01,198 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2021-10-13 01:15:01,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 01:15:01,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 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 8 [2021-10-13 01:15:01,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:01,217 INFO L225 Difference]: With dead ends: 92 [2021-10-13 01:15:01,217 INFO L226 Difference]: Without dead ends: 89 [2021-10-13 01:15:01,221 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 01:15:01,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-13 01:15:01,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2021-10-13 01:15:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 65 states have internal predecessors, (81), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:15:01,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-10-13 01:15:01,291 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 8 [2021-10-13 01:15:01,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:01,292 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-10-13 01:15:01,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:15:01,292 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-10-13 01:15:01,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 01:15:01,294 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:01,294 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:01,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 01:15:01,295 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:15:01,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:01,297 INFO L82 PathProgramCache]: Analyzing trace with hash 451849005, now seen corresponding path program 1 times [2021-10-13 01:15:01,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:15:01,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545432466] [2021-10-13 01:15:01,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:01,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:15:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:01,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:15:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:15:01,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:15:01,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545432466] [2021-10-13 01:15:01,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545432466] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:15:01,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:15:01,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 01:15:01,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912065505] [2021-10-13 01:15:01,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:15:01,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:15:01,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:15:01,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:15:01,584 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:15:01,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:01,978 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2021-10-13 01:15:01,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 01:15:01,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 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 10 [2021-10-13 01:15:01,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:01,985 INFO L225 Difference]: With dead ends: 91 [2021-10-13 01:15:01,985 INFO L226 Difference]: Without dead ends: 91 [2021-10-13 01:15:01,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 158.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:15:01,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-13 01:15:02,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2021-10-13 01:15:02,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 66 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:15:02,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-10-13 01:15:02,013 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 10 [2021-10-13 01:15:02,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:02,014 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-10-13 01:15:02,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:15:02,014 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-10-13 01:15:02,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 01:15:02,016 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:02,016 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:02,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 01:15:02,017 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:15:02,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:02,017 INFO L82 PathProgramCache]: Analyzing trace with hash 451908587, now seen corresponding path program 1 times [2021-10-13 01:15:02,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:15:02,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338631020] [2021-10-13 01:15:02,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:02,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:15:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:02,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:15:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:15:02,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:15:02,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338631020] [2021-10-13 01:15:02,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338631020] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:15:02,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:15:02,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 01:15:02,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883365832] [2021-10-13 01:15:02,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:15:02,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:15:02,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:15:02,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:15:02,293 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:15:02,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:02,657 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2021-10-13 01:15:02,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 01:15:02,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-13 01:15:02,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:02,664 INFO L225 Difference]: With dead ends: 135 [2021-10-13 01:15:02,665 INFO L226 Difference]: Without dead ends: 135 [2021-10-13 01:15:02,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:15:02,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-13 01:15:02,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 108. [2021-10-13 01:15:02,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 77 states have (on average 1.8311688311688312) internal successors, (141), 99 states have internal predecessors, (141), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-13 01:15:02,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2021-10-13 01:15:02,686 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 10 [2021-10-13 01:15:02,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:02,687 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2021-10-13 01:15:02,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:15:02,687 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2021-10-13 01:15:02,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 01:15:02,688 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:02,688 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:02,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 01:15:02,689 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:15:02,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:02,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1124262917, now seen corresponding path program 1 times [2021-10-13 01:15:02,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:15:02,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398137707] [2021-10-13 01:15:02,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:02,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:15:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:02,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:15:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:15:02,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:15:02,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398137707] [2021-10-13 01:15:02,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398137707] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:15:02,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:15:02,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 01:15:02,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339947476] [2021-10-13 01:15:02,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:15:02,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:15:02,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:15:02,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:15:02,809 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:15:03,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:03,062 INFO L93 Difference]: Finished difference Result 149 states and 214 transitions. [2021-10-13 01:15:03,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 01:15:03,063 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 [2021-10-13 01:15:03,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:03,066 INFO L225 Difference]: With dead ends: 149 [2021-10-13 01:15:03,066 INFO L226 Difference]: Without dead ends: 144 [2021-10-13 01:15:03,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:15:03,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-13 01:15:03,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 126. [2021-10-13 01:15:03,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 89 states have (on average 1.7752808988764044) internal successors, (158), 115 states have internal predecessors, (158), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-13 01:15:03,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 183 transitions. [2021-10-13 01:15:03,084 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 183 transitions. Word has length 11 [2021-10-13 01:15:03,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:03,084 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 183 transitions. [2021-10-13 01:15:03,085 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) [2021-10-13 01:15:03,085 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 183 transitions. [2021-10-13 01:15:03,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 01:15:03,086 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:03,086 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:03,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 01:15:03,086 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:15:03,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:03,087 INFO L82 PathProgramCache]: Analyzing trace with hash 649350680, now seen corresponding path program 1 times [2021-10-13 01:15:03,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:15:03,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576740769] [2021-10-13 01:15:03,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:03,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:15:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:03,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:15:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:15:03,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:15:03,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576740769] [2021-10-13 01:15:03,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576740769] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:15:03,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:15:03,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 01:15:03,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972401697] [2021-10-13 01:15:03,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 01:15:03,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:15:03,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 01:15:03,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:15:03,261 INFO L87 Difference]: Start difference. First operand 126 states and 183 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-10-13 01:15:03,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:03,717 INFO L93 Difference]: Finished difference Result 197 states and 286 transitions. [2021-10-13 01:15:03,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 01:15:03,718 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) Word has length 13 [2021-10-13 01:15:03,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:03,726 INFO L225 Difference]: With dead ends: 197 [2021-10-13 01:15:03,726 INFO L226 Difference]: Without dead ends: 197 [2021-10-13 01:15:03,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 257.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:15:03,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-10-13 01:15:03,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 166. [2021-10-13 01:15:03,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 125 states have (on average 1.752) internal successors, (219), 151 states have internal predecessors, (219), 12 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (20), 7 states have call predecessors, (20), 11 states have call successors, (20) [2021-10-13 01:15:03,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 251 transitions. [2021-10-13 01:15:03,769 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 251 transitions. Word has length 13 [2021-10-13 01:15:03,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:03,770 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 251 transitions. [2021-10-13 01:15:03,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-10-13 01:15:03,770 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 251 transitions. [2021-10-13 01:15:03,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 01:15:03,771 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:03,771 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:03,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 01:15:03,772 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:15:03,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:03,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1870609254, now seen corresponding path program 1 times [2021-10-13 01:15:03,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:15:03,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623067989] [2021-10-13 01:15:03,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:03,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:15:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:03,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:15:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:15:03,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:15:03,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623067989] [2021-10-13 01:15:03,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623067989] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:15:03,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:15:03,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 01:15:03,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315644340] [2021-10-13 01:15:03,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:15:03,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:15:03,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:15:03,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:15:03,885 INFO L87 Difference]: Start difference. First operand 166 states and 251 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-10-13 01:15:04,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:04,354 INFO L93 Difference]: Finished difference Result 260 states and 393 transitions. [2021-10-13 01:15:04,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 01:15:04,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 13 [2021-10-13 01:15:04,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:04,359 INFO L225 Difference]: With dead ends: 260 [2021-10-13 01:15:04,359 INFO L226 Difference]: Without dead ends: 260 [2021-10-13 01:15:04,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:15:04,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-10-13 01:15:04,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 233. [2021-10-13 01:15:04,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 186 states have (on average 1.7258064516129032) internal successors, (321), 212 states have internal predecessors, (321), 16 states have call successors, (16), 12 states have call predecessors, (16), 13 states have return successors, (29), 9 states have call predecessors, (29), 15 states have call successors, (29) [2021-10-13 01:15:04,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 366 transitions. [2021-10-13 01:15:04,378 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 366 transitions. Word has length 13 [2021-10-13 01:15:04,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:04,379 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 366 transitions. [2021-10-13 01:15:04,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-10-13 01:15:04,379 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 366 transitions. [2021-10-13 01:15:04,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 01:15:04,380 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:04,380 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:04,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 01:15:04,381 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting pushErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:15:04,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:04,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1870609253, now seen corresponding path program 1 times [2021-10-13 01:15:04,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:15:04,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407814979] [2021-10-13 01:15:04,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:04,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:15:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:04,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:15:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:15:04,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:15:04,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407814979] [2021-10-13 01:15:04,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407814979] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:15:04,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:15:04,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 01:15:04,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576080926] [2021-10-13 01:15:04,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:15:04,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:15:04,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:15:04,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:15:04,517 INFO L87 Difference]: Start difference. First operand 233 states and 366 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-10-13 01:15:04,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:04,948 INFO L93 Difference]: Finished difference Result 311 states and 476 transitions. [2021-10-13 01:15:04,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 01:15:04,950 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 13 [2021-10-13 01:15:04,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:04,954 INFO L225 Difference]: With dead ends: 311 [2021-10-13 01:15:04,954 INFO L226 Difference]: Without dead ends: 311 [2021-10-13 01:15:04,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:15:04,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-10-13 01:15:04,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 287. [2021-10-13 01:15:04,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 238 states have (on average 1.7016806722689075) internal successors, (405), 262 states have internal predecessors, (405), 16 states have call successors, (16), 16 states have call predecessors, (16), 17 states have return successors, (29), 9 states have call predecessors, (29), 15 states have call successors, (29) [2021-10-13 01:15:04,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 450 transitions. [2021-10-13 01:15:04,972 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 450 transitions. Word has length 13 [2021-10-13 01:15:04,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:04,973 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 450 transitions. [2021-10-13 01:15:04,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-10-13 01:15:04,973 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 450 transitions. [2021-10-13 01:15:04,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 01:15:04,974 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:04,974 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:04,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 01:15:04,975 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting pushErr4REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:15:04,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:04,976 INFO L82 PathProgramCache]: Analyzing trace with hash 2140662271, now seen corresponding path program 1 times [2021-10-13 01:15:04,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:15:04,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858780773] [2021-10-13 01:15:04,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:04,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:15:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:05,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:15:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:15:05,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:15:05,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858780773] [2021-10-13 01:15:05,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858780773] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:15:05,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:15:05,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 01:15:05,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541978784] [2021-10-13 01:15:05,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 01:15:05,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:15:05,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 01:15:05,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:15:05,087 INFO L87 Difference]: Start difference. First operand 287 states and 450 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 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) [2021-10-13 01:15:05,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:05,402 INFO L93 Difference]: Finished difference Result 275 states and 400 transitions. [2021-10-13 01:15:05,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 01:15:05,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 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 14 [2021-10-13 01:15:05,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:05,406 INFO L225 Difference]: With dead ends: 275 [2021-10-13 01:15:05,406 INFO L226 Difference]: Without dead ends: 275 [2021-10-13 01:15:05,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 01:15:05,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-10-13 01:15:05,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 238. [2021-10-13 01:15:05,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 197 states have (on average 1.649746192893401) internal successors, (325), 215 states have internal predecessors, (325), 14 states have call successors, (14), 14 states have call predecessors, (14), 15 states have return successors, (23), 9 states have call predecessors, (23), 13 states have call successors, (23) [2021-10-13 01:15:05,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 362 transitions. [2021-10-13 01:15:05,421 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 362 transitions. Word has length 14 [2021-10-13 01:15:05,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:05,422 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 362 transitions. [2021-10-13 01:15:05,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 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) [2021-10-13 01:15:05,422 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 362 transitions. [2021-10-13 01:15:05,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 01:15:05,423 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:05,423 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:05,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 01:15:05,424 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:15:05,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:05,424 INFO L82 PathProgramCache]: Analyzing trace with hash 406451957, now seen corresponding path program 1 times [2021-10-13 01:15:05,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:15:05,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041100913] [2021-10-13 01:15:05,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:05,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:15:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:05,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:15:05,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:05,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:15:05,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:15:05,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041100913] [2021-10-13 01:15:05,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041100913] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:15:05,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:15:05,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 01:15:05,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073559335] [2021-10-13 01:15:05,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 01:15:05,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:15:05,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 01:15:05,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:15:05,567 INFO L87 Difference]: Start difference. First operand 238 states and 362 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:15:05,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:05,868 INFO L93 Difference]: Finished difference Result 439 states and 619 transitions. [2021-10-13 01:15:05,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 01:15:05,869 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 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 [2021-10-13 01:15:05,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:05,873 INFO L225 Difference]: With dead ends: 439 [2021-10-13 01:15:05,873 INFO L226 Difference]: Without dead ends: 439 [2021-10-13 01:15:05,874 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:15:05,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-10-13 01:15:05,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 409. [2021-10-13 01:15:05,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 334 states have (on average 1.5089820359281436) internal successors, (504), 366 states have internal predecessors, (504), 26 states have call successors, (26), 26 states have call predecessors, (26), 37 states have return successors, (55), 17 states have call predecessors, (55), 25 states have call successors, (55) [2021-10-13 01:15:05,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 585 transitions. [2021-10-13 01:15:05,898 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 585 transitions. Word has length 15 [2021-10-13 01:15:05,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:05,899 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 585 transitions. [2021-10-13 01:15:05,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:15:05,899 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 585 transitions. [2021-10-13 01:15:05,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 01:15:05,901 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:05,901 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:05,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-13 01:15:05,901 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:15:05,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:05,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1475656894, now seen corresponding path program 1 times [2021-10-13 01:15:05,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:15:05,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244855848] [2021-10-13 01:15:05,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:05,903 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:15:05,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:06,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:15:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:06,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:15:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:15:06,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:15:06,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244855848] [2021-10-13 01:15:06,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244855848] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:06,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520838650] [2021-10-13 01:15:06,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:06,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:15:06,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:15:06,152 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:15:06,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 01:15:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:06,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 01:15:06,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:15:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:15:06,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520838650] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:06,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:15:06,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-13 01:15:06,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150553473] [2021-10-13 01:15:06,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 01:15:06,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:15:06,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 01:15:06,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:15:06,630 INFO L87 Difference]: Start difference. First operand 409 states and 585 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-13 01:15:07,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:07,742 INFO L93 Difference]: Finished difference Result 491 states and 695 transitions. [2021-10-13 01:15:07,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 01:15:07,742 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 22 [2021-10-13 01:15:07,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:07,750 INFO L225 Difference]: With dead ends: 491 [2021-10-13 01:15:07,750 INFO L226 Difference]: Without dead ends: 491 [2021-10-13 01:15:07,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 514.7ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-10-13 01:15:07,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-10-13 01:15:07,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 425. [2021-10-13 01:15:07,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 340 states have (on average 1.4764705882352942) internal successors, (502), 382 states have internal predecessors, (502), 26 states have call successors, (26), 26 states have call predecessors, (26), 47 states have return successors, (65), 17 states have call predecessors, (65), 25 states have call successors, (65) [2021-10-13 01:15:07,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 593 transitions. [2021-10-13 01:15:07,789 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 593 transitions. Word has length 22 [2021-10-13 01:15:07,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:07,790 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 593 transitions. [2021-10-13 01:15:07,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-13 01:15:07,790 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 593 transitions. [2021-10-13 01:15:07,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 01:15:07,793 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:07,793 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:07,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 01:15:08,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-13 01:15:08,002 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:15:08,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:08,003 INFO L82 PathProgramCache]: Analyzing trace with hash -2086418946, now seen corresponding path program 1 times [2021-10-13 01:15:08,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:15:08,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185864862] [2021-10-13 01:15:08,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:08,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:15:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:08,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:15:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:08,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:15:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:15:08,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:15:08,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185864862] [2021-10-13 01:15:08,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185864862] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:08,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776172821] [2021-10-13 01:15:08,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:08,222 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:15:08,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:15:08,223 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:15:08,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 01:15:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:08,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 01:15:08,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:15:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:15:08,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776172821] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:08,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:15:08,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-10-13 01:15:08,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22186257] [2021-10-13 01:15:08,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 01:15:08,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:15:08,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 01:15:08,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-13 01:15:08,609 INFO L87 Difference]: Start difference. First operand 425 states and 593 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-13 01:15:09,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:09,754 INFO L93 Difference]: Finished difference Result 739 states and 1008 transitions. [2021-10-13 01:15:09,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 01:15:09,754 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2021-10-13 01:15:09,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:09,761 INFO L225 Difference]: With dead ends: 739 [2021-10-13 01:15:09,761 INFO L226 Difference]: Without dead ends: 739 [2021-10-13 01:15:09,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 621.5ms TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2021-10-13 01:15:09,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-10-13 01:15:09,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 642. [2021-10-13 01:15:09,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 507 states have (on average 1.4260355029585798) internal successors, (723), 579 states have internal predecessors, (723), 38 states have call successors, (38), 38 states have call predecessors, (38), 85 states have return successors, (113), 25 states have call predecessors, (113), 37 states have call successors, (113) [2021-10-13 01:15:09,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 874 transitions. [2021-10-13 01:15:09,799 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 874 transitions. Word has length 24 [2021-10-13 01:15:09,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:09,800 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 874 transitions. [2021-10-13 01:15:09,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-13 01:15:09,801 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 874 transitions. [2021-10-13 01:15:09,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 01:15:09,803 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:09,803 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:09,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 01:15:10,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:15:10,025 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:15:10,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:10,025 INFO L82 PathProgramCache]: Analyzing trace with hash -495871717, now seen corresponding path program 1 times [2021-10-13 01:15:10,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:15:10,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99633481] [2021-10-13 01:15:10,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:10,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:15:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:10,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:15:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:10,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:15:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:10,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-13 01:15:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:15:10,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:15:10,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99633481] [2021-10-13 01:15:10,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99633481] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:10,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8323825] [2021-10-13 01:15:10,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:10,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:15:10,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:15:10,301 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:15:10,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 01:15:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:10,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 01:15:10,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:15:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:15:10,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8323825] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:10,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:15:10,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-10-13 01:15:10,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018355623] [2021-10-13 01:15:10,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 01:15:10,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:15:10,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 01:15:10,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-10-13 01:15:10,846 INFO L87 Difference]: Start difference. First operand 642 states and 874 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-13 01:15:12,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:12,802 INFO L93 Difference]: Finished difference Result 2361 states and 3365 transitions. [2021-10-13 01:15:12,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 01:15:12,803 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 35 [2021-10-13 01:15:12,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:12,824 INFO L225 Difference]: With dead ends: 2361 [2021-10-13 01:15:12,824 INFO L226 Difference]: Without dead ends: 2361 [2021-10-13 01:15:12,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1225.2ms TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2021-10-13 01:15:12,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-10-13 01:15:12,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2015. [2021-10-13 01:15:12,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 1621 states have (on average 1.4090067859346083) internal successors, (2284), 1816 states have internal predecessors, (2284), 123 states have call successors, (123), 123 states have call predecessors, (123), 259 states have return successors, (388), 76 states have call predecessors, (388), 122 states have call successors, (388) [2021-10-13 01:15:12,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 2795 transitions. [2021-10-13 01:15:12,956 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 2795 transitions. Word has length 35 [2021-10-13 01:15:12,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:12,957 INFO L470 AbstractCegarLoop]: Abstraction has 2015 states and 2795 transitions. [2021-10-13 01:15:12,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-13 01:15:12,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 2795 transitions. [2021-10-13 01:15:12,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 01:15:12,964 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:12,964 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:13,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 01:15:13,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:15:13,189 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:15:13,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:13,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1356372979, now seen corresponding path program 1 times [2021-10-13 01:15:13,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:15:13,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82367063] [2021-10-13 01:15:13,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:13,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:15:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:13,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:15:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:13,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:15:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:13,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:15:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:15:13,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:15:13,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82367063] [2021-10-13 01:15:13,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82367063] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:13,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420989735] [2021-10-13 01:15:13,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:13,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:15:13,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:15:13,477 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:15:13,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 01:15:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:13,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 01:15:13,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:15:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:15:14,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420989735] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:14,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:15:14,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-10-13 01:15:14,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419534175] [2021-10-13 01:15:14,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 01:15:14,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:15:14,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 01:15:14,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-13 01:15:14,016 INFO L87 Difference]: Start difference. First operand 2015 states and 2795 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:15:15,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:15,142 INFO L93 Difference]: Finished difference Result 2783 states and 4061 transitions. [2021-10-13 01:15:15,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 01:15:15,143 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2021-10-13 01:15:15,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:15,169 INFO L225 Difference]: With dead ends: 2783 [2021-10-13 01:15:15,170 INFO L226 Difference]: Without dead ends: 2783 [2021-10-13 01:15:15,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 552.3ms TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2021-10-13 01:15:15,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-10-13 01:15:15,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2472. [2021-10-13 01:15:15,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 1977 states have (on average 1.4011127971674253) internal successors, (2770), 2227 states have internal predecessors, (2770), 169 states have call successors, (169), 146 states have call predecessors, (169), 314 states have return successors, (533), 99 states have call predecessors, (533), 168 states have call successors, (533) [2021-10-13 01:15:15,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 3472 transitions. [2021-10-13 01:15:15,325 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 3472 transitions. Word has length 36 [2021-10-13 01:15:15,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:15,326 INFO L470 AbstractCegarLoop]: Abstraction has 2472 states and 3472 transitions. [2021-10-13 01:15:15,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:15:15,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 3472 transitions. [2021-10-13 01:15:15,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-13 01:15:15,331 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:15,331 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:15,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 01:15:15,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:15:15,557 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:15:15,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:15,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1744987825, now seen corresponding path program 1 times [2021-10-13 01:15:15,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:15:15,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592176452] [2021-10-13 01:15:15,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:15,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:15:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:15,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:15:15,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:15,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:15:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:15,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-13 01:15:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:15,898 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:15:15,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:15:15,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592176452] [2021-10-13 01:15:15,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592176452] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:15,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418066994] [2021-10-13 01:15:15,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:15,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:15:15,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:15:15,905 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:15:15,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 01:15:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:16,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 01:15:16,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:15:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:15:16,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418066994] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:16,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:15:16,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-10-13 01:15:16,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304592701] [2021-10-13 01:15:16,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 01:15:16,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:15:16,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 01:15:16,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-10-13 01:15:16,389 INFO L87 Difference]: Start difference. First operand 2472 states and 3472 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 10 states have internal predecessors, (39), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-13 01:15:17,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:17,616 INFO L93 Difference]: Finished difference Result 2236 states and 3085 transitions. [2021-10-13 01:15:17,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 01:15:17,617 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 10 states have internal predecessors, (39), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-10-13 01:15:17,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:17,635 INFO L225 Difference]: With dead ends: 2236 [2021-10-13 01:15:17,635 INFO L226 Difference]: Without dead ends: 2120 [2021-10-13 01:15:17,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 803.4ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-10-13 01:15:17,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-10-13 01:15:17,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1825. [2021-10-13 01:15:17,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1825 states, 1447 states have (on average 1.38217000691085) internal successors, (2000), 1634 states have internal predecessors, (2000), 142 states have call successors, (142), 119 states have call predecessors, (142), 224 states have return successors, (364), 72 states have call predecessors, (364), 141 states have call successors, (364) [2021-10-13 01:15:17,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 2506 transitions. [2021-10-13 01:15:17,746 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 2506 transitions. Word has length 38 [2021-10-13 01:15:17,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:17,749 INFO L470 AbstractCegarLoop]: Abstraction has 1825 states and 2506 transitions. [2021-10-13 01:15:17,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 10 states have internal predecessors, (39), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-13 01:15:17,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 2506 transitions. [2021-10-13 01:15:17,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-13 01:15:17,752 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:17,752 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:17,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 01:15:17,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-13 01:15:17,978 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:15:17,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:17,979 INFO L82 PathProgramCache]: Analyzing trace with hash 421703127, now seen corresponding path program 1 times [2021-10-13 01:15:17,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:15:17,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587705970] [2021-10-13 01:15:17,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:17,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:15:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:18,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:15:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:18,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:15:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:18,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:15:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:18,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-13 01:15:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 01:15:18,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:15:18,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587705970] [2021-10-13 01:15:18,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587705970] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:18,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716412817] [2021-10-13 01:15:18,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:18,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:15:18,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:15:18,294 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:15:18,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 01:15:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:18,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 01:15:18,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:15:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 01:15:18,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716412817] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:18,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:15:18,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-10-13 01:15:18,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687030268] [2021-10-13 01:15:18,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 01:15:18,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:15:18,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 01:15:18,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-10-13 01:15:18,835 INFO L87 Difference]: Start difference. First operand 1825 states and 2506 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-13 01:15:20,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:20,333 INFO L93 Difference]: Finished difference Result 3248 states and 4600 transitions. [2021-10-13 01:15:20,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 01:15:20,334 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2021-10-13 01:15:20,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:20,361 INFO L225 Difference]: With dead ends: 3248 [2021-10-13 01:15:20,362 INFO L226 Difference]: Without dead ends: 3248 [2021-10-13 01:15:20,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 790.4ms TimeCoverageRelationStatistics Valid=283, Invalid=977, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 01:15:20,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3248 states. [2021-10-13 01:15:20,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3248 to 2632. [2021-10-13 01:15:20,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2632 states, 2104 states have (on average 1.3935361216730038) internal successors, (2932), 2372 states have internal predecessors, (2932), 188 states have call successors, (188), 165 states have call predecessors, (188), 328 states have return successors, (488), 95 states have call predecessors, (488), 187 states have call successors, (488) [2021-10-13 01:15:20,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 3608 transitions. [2021-10-13 01:15:20,498 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 3608 transitions. Word has length 47 [2021-10-13 01:15:20,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:20,499 INFO L470 AbstractCegarLoop]: Abstraction has 2632 states and 3608 transitions. [2021-10-13 01:15:20,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-13 01:15:20,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 3608 transitions. [2021-10-13 01:15:20,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-13 01:15:20,502 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:20,502 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:20,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 01:15:20,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-13 01:15:20,725 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:15:20,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:20,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1681124145, now seen corresponding path program 1 times [2021-10-13 01:15:20,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:15:20,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698321908] [2021-10-13 01:15:20,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:20,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:15:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:20,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:15:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:20,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:15:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:20,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:15:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:20,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-13 01:15:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:20,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-13 01:15:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-13 01:15:21,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:15:21,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698321908] [2021-10-13 01:15:21,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698321908] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:21,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738963662] [2021-10-13 01:15:21,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:21,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:15:21,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:15:21,022 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:15:21,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 01:15:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:21,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 01:15:21,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:15:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 44 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 01:15:21,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738963662] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:21,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:15:21,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-10-13 01:15:21,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849439286] [2021-10-13 01:15:21,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 01:15:21,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:15:21,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 01:15:21,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-13 01:15:21,585 INFO L87 Difference]: Start difference. First operand 2632 states and 3608 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-13 01:15:22,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:22,421 INFO L93 Difference]: Finished difference Result 3687 states and 5274 transitions. [2021-10-13 01:15:22,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 01:15:22,423 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2021-10-13 01:15:22,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:22,455 INFO L225 Difference]: With dead ends: 3687 [2021-10-13 01:15:22,455 INFO L226 Difference]: Without dead ends: 3687 [2021-10-13 01:15:22,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 406.1ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-10-13 01:15:22,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3687 states. [2021-10-13 01:15:22,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3687 to 2678. [2021-10-13 01:15:22,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2127 states have (on average 1.3892806770098731) internal successors, (2955), 2418 states have internal predecessors, (2955), 188 states have call successors, (188), 165 states have call predecessors, (188), 351 states have return successors, (534), 95 states have call predecessors, (534), 187 states have call successors, (534) [2021-10-13 01:15:22,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 3677 transitions. [2021-10-13 01:15:22,597 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 3677 transitions. Word has length 58 [2021-10-13 01:15:22,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:22,598 INFO L470 AbstractCegarLoop]: Abstraction has 2678 states and 3677 transitions. [2021-10-13 01:15:22,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-13 01:15:22,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 3677 transitions. [2021-10-13 01:15:22,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-13 01:15:22,600 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:22,600 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 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] [2021-10-13 01:15:22,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 01:15:22,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-13 01:15:22,815 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:15:22,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:22,816 INFO L82 PathProgramCache]: Analyzing trace with hash 57126017, now seen corresponding path program 1 times [2021-10-13 01:15:22,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:15:22,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450268667] [2021-10-13 01:15:22,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:22,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:15:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:23,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:15:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:23,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:15:23,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:23,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:15:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:23,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-10-13 01:15:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:23,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-10-13 01:15:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-13 01:15:23,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:15:23,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450268667] [2021-10-13 01:15:23,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450268667] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:23,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517300945] [2021-10-13 01:15:23,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:23,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:15:23,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:15:23,197 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:15:23,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 01:15:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:23,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 01:15:23,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:15:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-13 01:15:23,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517300945] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:23,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:15:23,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2021-10-13 01:15:23,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893750392] [2021-10-13 01:15:23,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 01:15:23,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:15:23,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 01:15:23,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-10-13 01:15:23,965 INFO L87 Difference]: Start difference. First operand 2678 states and 3677 transitions. Second operand has 20 states, 20 states have (on average 4.0) internal successors, (80), 16 states have internal predecessors, (80), 7 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-10-13 01:15:33,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:33,855 INFO L93 Difference]: Finished difference Result 10210 states and 14276 transitions. [2021-10-13 01:15:33,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-10-13 01:15:33,856 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 16 states have internal predecessors, (80), 7 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 60 [2021-10-13 01:15:33,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:33,955 INFO L225 Difference]: With dead ends: 10210 [2021-10-13 01:15:33,955 INFO L226 Difference]: Without dead ends: 10035 [2021-10-13 01:15:33,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10272 ImplicationChecksByTransitivity, 6436.3ms TimeCoverageRelationStatistics Valid=3114, Invalid=23618, Unknown=0, NotChecked=0, Total=26732 [2021-10-13 01:15:33,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10035 states. [2021-10-13 01:15:34,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10035 to 8947. [2021-10-13 01:15:34,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8947 states, 7143 states have (on average 1.360212795744085) internal successors, (9716), 8037 states have internal predecessors, (9716), 670 states have call successors, (670), 573 states have call predecessors, (670), 1123 states have return successors, (2034), 337 states have call predecessors, (2034), 669 states have call successors, (2034) [2021-10-13 01:15:34,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8947 states to 8947 states and 12420 transitions. [2021-10-13 01:15:34,508 INFO L78 Accepts]: Start accepts. Automaton has 8947 states and 12420 transitions. Word has length 60 [2021-10-13 01:15:34,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:34,509 INFO L470 AbstractCegarLoop]: Abstraction has 8947 states and 12420 transitions. [2021-10-13 01:15:34,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 16 states have internal predecessors, (80), 7 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-10-13 01:15:34,510 INFO L276 IsEmpty]: Start isEmpty. Operand 8947 states and 12420 transitions. [2021-10-13 01:15:34,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-13 01:15:34,513 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:34,514 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:34,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 01:15:34,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-13 01:15:34,729 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:15:34,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:34,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1356938417, now seen corresponding path program 1 times [2021-10-13 01:15:34,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:15:34,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662640355] [2021-10-13 01:15:34,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:34,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:15:34,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:34,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:15:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:34,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:15:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:34,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:15:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:34,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-13 01:15:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:34,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-13 01:15:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 41 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-13 01:15:35,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:15:35,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662640355] [2021-10-13 01:15:35,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662640355] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:35,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177418320] [2021-10-13 01:15:35,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:35,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:15:35,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:15:35,048 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:15:35,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 01:15:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:35,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 01:15:35,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:15:35,835 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 01:15:35,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177418320] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:35,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:15:35,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-10-13 01:15:35,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292290030] [2021-10-13 01:15:35,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 01:15:35,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:15:35,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 01:15:35,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-10-13 01:15:35,839 INFO L87 Difference]: Start difference. First operand 8947 states and 12420 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-10-13 01:15:37,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:37,839 INFO L93 Difference]: Finished difference Result 18386 states and 26465 transitions. [2021-10-13 01:15:37,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-13 01:15:37,840 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 60 [2021-10-13 01:15:37,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:37,945 INFO L225 Difference]: With dead ends: 18386 [2021-10-13 01:15:37,945 INFO L226 Difference]: Without dead ends: 18386 [2021-10-13 01:15:37,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1220.8ms TimeCoverageRelationStatistics Valid=547, Invalid=1903, Unknown=0, NotChecked=0, Total=2450 [2021-10-13 01:15:37,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18386 states. [2021-10-13 01:15:38,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18386 to 14298. [2021-10-13 01:15:38,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14298 states, 11614 states have (on average 1.3810056827966248) internal successors, (16039), 12898 states have internal predecessors, (16039), 1002 states have call successors, (1002), 897 states have call predecessors, (1002), 1671 states have return successors, (3048), 503 states have call predecessors, (3048), 1001 states have call successors, (3048) [2021-10-13 01:15:38,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14298 states to 14298 states and 20089 transitions. [2021-10-13 01:15:38,610 INFO L78 Accepts]: Start accepts. Automaton has 14298 states and 20089 transitions. Word has length 60 [2021-10-13 01:15:38,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:38,611 INFO L470 AbstractCegarLoop]: Abstraction has 14298 states and 20089 transitions. [2021-10-13 01:15:38,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-10-13 01:15:38,612 INFO L276 IsEmpty]: Start isEmpty. Operand 14298 states and 20089 transitions. [2021-10-13 01:15:38,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-13 01:15:38,616 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:38,616 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 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, 1] [2021-10-13 01:15:38,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 01:15:38,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-13 01:15:38,845 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:15:38,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:38,845 INFO L82 PathProgramCache]: Analyzing trace with hash 7649356, now seen corresponding path program 1 times [2021-10-13 01:15:38,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:15:38,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236426844] [2021-10-13 01:15:38,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:38,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:15:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:39,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:15:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:39,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:15:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:39,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:15:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:39,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-13 01:15:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:39,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-13 01:15:39,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:39,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-10-13 01:15:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:39,243 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-13 01:15:39,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:15:39,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236426844] [2021-10-13 01:15:39,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236426844] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:39,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772682898] [2021-10-13 01:15:39,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:39,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:15:39,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:15:39,246 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:15:39,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 01:15:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:39,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 01:15:39,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:15:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-13 01:15:40,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772682898] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:40,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:15:40,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-10-13 01:15:40,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002265796] [2021-10-13 01:15:40,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 01:15:40,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:15:40,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 01:15:40,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-10-13 01:15:40,013 INFO L87 Difference]: Start difference. First operand 14298 states and 20089 transitions. Second operand has 16 states, 16 states have (on average 4.4375) internal successors, (71), 12 states have internal predecessors, (71), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-13 01:15:42,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:42,328 INFO L93 Difference]: Finished difference Result 18457 states and 26048 transitions. [2021-10-13 01:15:42,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 01:15:42,330 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 12 states have internal predecessors, (71), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 71 [2021-10-13 01:15:42,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:42,407 INFO L225 Difference]: With dead ends: 18457 [2021-10-13 01:15:42,407 INFO L226 Difference]: Without dead ends: 18282 [2021-10-13 01:15:42,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1497.8ms TimeCoverageRelationStatistics Valid=390, Invalid=1416, Unknown=0, NotChecked=0, Total=1806 [2021-10-13 01:15:42,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18282 states. [2021-10-13 01:15:42,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18282 to 17261. [2021-10-13 01:15:42,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17261 states, 13838 states have (on average 1.3599508599508598) internal successors, (18819), 15533 states have internal predecessors, (18819), 1334 states have call successors, (1334), 1059 states have call predecessors, (1334), 2078 states have return successors, (4228), 669 states have call predecessors, (4228), 1333 states have call successors, (4228) [2021-10-13 01:15:43,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17261 states to 17261 states and 24381 transitions. [2021-10-13 01:15:43,035 INFO L78 Accepts]: Start accepts. Automaton has 17261 states and 24381 transitions. Word has length 71 [2021-10-13 01:15:43,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:43,036 INFO L470 AbstractCegarLoop]: Abstraction has 17261 states and 24381 transitions. [2021-10-13 01:15:43,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 12 states have internal predecessors, (71), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-13 01:15:43,036 INFO L276 IsEmpty]: Start isEmpty. Operand 17261 states and 24381 transitions. [2021-10-13 01:15:43,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-13 01:15:43,041 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:43,042 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 4, 4, 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, 1] [2021-10-13 01:15:43,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 01:15:43,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:15:43,257 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:15:43,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:43,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1516849340, now seen corresponding path program 1 times [2021-10-13 01:15:43,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:15:43,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162572401] [2021-10-13 01:15:43,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:43,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:15:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:43,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:15:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:43,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:15:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:43,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:15:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:43,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-13 01:15:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:43,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-13 01:15:43,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:43,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-10-13 01:15:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:43,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-10-13 01:15:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 82 proven. 5 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-10-13 01:15:43,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:15:43,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162572401] [2021-10-13 01:15:43,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162572401] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:43,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906502480] [2021-10-13 01:15:43,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:43,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:15:43,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:15:43,541 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:15:43,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 01:15:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:44,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 01:15:44,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:15:44,396 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 80 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-13 01:15:44,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906502480] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:44,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:15:44,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2021-10-13 01:15:44,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075531321] [2021-10-13 01:15:44,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 01:15:44,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:15:44,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 01:15:44,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-13 01:15:44,400 INFO L87 Difference]: Start difference. First operand 17261 states and 24381 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 9 states have internal predecessors, (59), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-13 01:15:45,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:45,652 INFO L93 Difference]: Finished difference Result 22712 states and 32588 transitions. [2021-10-13 01:15:45,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 01:15:45,653 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 9 states have internal predecessors, (59), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 82 [2021-10-13 01:15:45,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:45,758 INFO L225 Difference]: With dead ends: 22712 [2021-10-13 01:15:45,758 INFO L226 Difference]: Without dead ends: 22712 [2021-10-13 01:15:45,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 692.4ms TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-10-13 01:15:45,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22712 states. [2021-10-13 01:15:46,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22712 to 17261. [2021-10-13 01:15:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17261 states, 13838 states have (on average 1.3599508599508598) internal successors, (18819), 15533 states have internal predecessors, (18819), 1334 states have call successors, (1334), 1059 states have call predecessors, (1334), 2078 states have return successors, (4228), 669 states have call predecessors, (4228), 1333 states have call successors, (4228) [2021-10-13 01:15:46,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17261 states to 17261 states and 24381 transitions. [2021-10-13 01:15:46,435 INFO L78 Accepts]: Start accepts. Automaton has 17261 states and 24381 transitions. Word has length 82 [2021-10-13 01:15:46,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:46,436 INFO L470 AbstractCegarLoop]: Abstraction has 17261 states and 24381 transitions. [2021-10-13 01:15:46,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 9 states have internal predecessors, (59), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-13 01:15:46,436 INFO L276 IsEmpty]: Start isEmpty. Operand 17261 states and 24381 transitions. [2021-10-13 01:15:46,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-13 01:15:46,448 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:46,449 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:46,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 01:15:46,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:15:46,673 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:15:46,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:46,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1173694170, now seen corresponding path program 1 times [2021-10-13 01:15:46,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:15:46,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973875869] [2021-10-13 01:15:46,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:46,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:15:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:46,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:15:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:46,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:15:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:46,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:15:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:46,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-13 01:15:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:46,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-13 01:15:46,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:47,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-10-13 01:15:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:47,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-10-13 01:15:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:47,037 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 72 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-13 01:15:47,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:15:47,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973875869] [2021-10-13 01:15:47,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973875869] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:47,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355345670] [2021-10-13 01:15:47,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:47,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:15:47,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:15:47,041 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:15:47,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 01:15:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:47,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 01:15:47,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:15:47,876 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 48 proven. 43 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-13 01:15:47,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355345670] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:47,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:15:47,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-10-13 01:15:47,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105190230] [2021-10-13 01:15:47,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 01:15:47,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:15:47,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 01:15:47,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-10-13 01:15:47,880 INFO L87 Difference]: Start difference. First operand 17261 states and 24381 transitions. Second operand has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 15 states have internal predecessors, (88), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-10-13 01:15:51,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:51,167 INFO L93 Difference]: Finished difference Result 27778 states and 39484 transitions. [2021-10-13 01:15:51,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-10-13 01:15:51,167 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 15 states have internal predecessors, (88), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 84 [2021-10-13 01:15:51,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:51,287 INFO L225 Difference]: With dead ends: 27778 [2021-10-13 01:15:51,287 INFO L226 Difference]: Without dead ends: 26524 [2021-10-13 01:15:51,289 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 2386.3ms TimeCoverageRelationStatistics Valid=778, Invalid=3254, Unknown=0, NotChecked=0, Total=4032 [2021-10-13 01:15:51,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26524 states. [2021-10-13 01:15:51,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26524 to 17896. [2021-10-13 01:15:51,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17896 states, 14358 states have (on average 1.3469146120629614) internal successors, (19339), 16087 states have internal predecessors, (19339), 1334 states have call successors, (1334), 1140 states have call predecessors, (1334), 2193 states have return successors, (4311), 669 states have call predecessors, (4311), 1333 states have call successors, (4311) [2021-10-13 01:15:52,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17896 states to 17896 states and 24984 transitions. [2021-10-13 01:15:52,053 INFO L78 Accepts]: Start accepts. Automaton has 17896 states and 24984 transitions. Word has length 84 [2021-10-13 01:15:52,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:52,054 INFO L470 AbstractCegarLoop]: Abstraction has 17896 states and 24984 transitions. [2021-10-13 01:15:52,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 15 states have internal predecessors, (88), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-10-13 01:15:52,054 INFO L276 IsEmpty]: Start isEmpty. Operand 17896 states and 24984 transitions. [2021-10-13 01:15:52,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-13 01:15:52,059 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:52,060 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:52,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 01:15:52,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:15:52,273 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:15:52,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:52,273 INFO L82 PathProgramCache]: Analyzing trace with hash 57278106, now seen corresponding path program 1 times [2021-10-13 01:15:52,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:15:52,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838082906] [2021-10-13 01:15:52,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:52,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:15:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:52,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:15:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:52,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:15:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:52,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:15:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:52,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-13 01:15:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:52,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-13 01:15:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:52,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-10-13 01:15:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:52,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-13 01:15:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 70 proven. 29 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-10-13 01:15:52,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:15:52,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838082906] [2021-10-13 01:15:52,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838082906] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:52,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824129933] [2021-10-13 01:15:52,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:52,525 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:15:52,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:15:52,529 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:15:52,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 01:15:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:52,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 01:15:52,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:15:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 122 proven. 11 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-13 01:15:53,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824129933] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:53,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:15:53,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-10-13 01:15:53,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861884521] [2021-10-13 01:15:53,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 01:15:53,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:15:53,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 01:15:53,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-10-13 01:15:53,367 INFO L87 Difference]: Start difference. First operand 17896 states and 24984 transitions. Second operand has 18 states, 18 states have (on average 4.5) internal successors, (81), 15 states have internal predecessors, (81), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-10-13 01:15:55,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:55,024 INFO L93 Difference]: Finished difference Result 14807 states and 19651 transitions. [2021-10-13 01:15:55,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-13 01:15:55,025 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 15 states have internal predecessors, (81), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 84 [2021-10-13 01:15:55,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:55,070 INFO L225 Difference]: With dead ends: 14807 [2021-10-13 01:15:55,071 INFO L226 Difference]: Without dead ends: 13835 [2021-10-13 01:15:55,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1000.3ms TimeCoverageRelationStatistics Valid=589, Invalid=2063, Unknown=0, NotChecked=0, Total=2652 [2021-10-13 01:15:55,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13835 states. [2021-10-13 01:15:55,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13835 to 13300. [2021-10-13 01:15:55,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13300 states, 10710 states have (on average 1.3072829131652661) internal successors, (14001), 11900 states have internal predecessors, (14001), 1002 states have call successors, (1002), 897 states have call predecessors, (1002), 1577 states have return successors, (2716), 503 states have call predecessors, (2716), 1001 states have call successors, (2716) [2021-10-13 01:15:55,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13300 states to 13300 states and 17719 transitions. [2021-10-13 01:15:55,529 INFO L78 Accepts]: Start accepts. Automaton has 13300 states and 17719 transitions. Word has length 84 [2021-10-13 01:15:55,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:55,530 INFO L470 AbstractCegarLoop]: Abstraction has 13300 states and 17719 transitions. [2021-10-13 01:15:55,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 15 states have internal predecessors, (81), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-10-13 01:15:55,530 INFO L276 IsEmpty]: Start isEmpty. Operand 13300 states and 17719 transitions. [2021-10-13 01:15:55,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-13 01:15:55,533 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:55,534 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:55,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 01:15:55,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-13 01:15:55,753 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:15:55,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:55,754 INFO L82 PathProgramCache]: Analyzing trace with hash -478636956, now seen corresponding path program 1 times [2021-10-13 01:15:55,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:15:55,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914085886] [2021-10-13 01:15:55,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:55,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:15:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:55,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:15:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:55,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:15:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:55,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:15:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:55,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-13 01:15:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:55,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-13 01:15:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:56,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-10-13 01:15:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:56,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-10-13 01:15:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 38 proven. 67 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-13 01:15:56,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:15:56,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914085886] [2021-10-13 01:15:56,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914085886] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:56,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099403560] [2021-10-13 01:15:56,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:56,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:15:56,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:15:56,050 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:15:56,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 01:15:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:56,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 01:15:56,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:15:56,869 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 49 proven. 65 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-10-13 01:15:56,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099403560] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:56,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:15:56,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2021-10-13 01:15:56,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554111459] [2021-10-13 01:15:56,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 01:15:56,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:15:56,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 01:15:56,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:15:56,873 INFO L87 Difference]: Start difference. First operand 13300 states and 17719 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-13 01:15:57,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:57,797 INFO L93 Difference]: Finished difference Result 13075 states and 17272 transitions. [2021-10-13 01:15:57,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 01:15:57,798 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 85 [2021-10-13 01:15:57,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:57,848 INFO L225 Difference]: With dead ends: 13075 [2021-10-13 01:15:57,848 INFO L226 Difference]: Without dead ends: 13075 [2021-10-13 01:15:57,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 451.9ms TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-10-13 01:15:57,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13075 states. [2021-10-13 01:15:58,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13075 to 12880. [2021-10-13 01:15:58,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12880 states, 10360 states have (on average 1.2998069498069498) internal successors, (13466), 11514 states have internal predecessors, (13466), 978 states have call successors, (978), 875 states have call predecessors, (978), 1531 states have return successors, (2628), 491 states have call predecessors, (2628), 977 states have call successors, (2628) [2021-10-13 01:15:58,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12880 states to 12880 states and 17072 transitions. [2021-10-13 01:15:58,265 INFO L78 Accepts]: Start accepts. Automaton has 12880 states and 17072 transitions. Word has length 85 [2021-10-13 01:15:58,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:58,266 INFO L470 AbstractCegarLoop]: Abstraction has 12880 states and 17072 transitions. [2021-10-13 01:15:58,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-13 01:15:58,266 INFO L276 IsEmpty]: Start isEmpty. Operand 12880 states and 17072 transitions. [2021-10-13 01:15:58,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-13 01:15:58,269 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:58,270 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:58,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-13 01:15:58,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-13 01:15:58,497 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:15:58,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:58,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1378069754, now seen corresponding path program 1 times [2021-10-13 01:15:58,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:15:58,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890716153] [2021-10-13 01:15:58,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:58,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:15:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:58,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:15:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:58,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:15:58,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:58,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:15:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:58,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-13 01:15:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:58,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-13 01:15:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:58,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-10-13 01:15:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:58,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-10-13 01:15:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 84 proven. 20 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-13 01:15:58,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:15:58,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890716153] [2021-10-13 01:15:58,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890716153] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:15:58,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594538011] [2021-10-13 01:15:58,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:58,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:15:58,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:15:58,850 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:15:58,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 01:15:59,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:59,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 01:15:59,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:16:00,094 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 128 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-13 01:16:00,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594538011] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:16:00,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:16:00,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-10-13 01:16:00,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289291884] [2021-10-13 01:16:00,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 01:16:00,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:16:00,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 01:16:00,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-10-13 01:16:00,099 INFO L87 Difference]: Start difference. First operand 12880 states and 17072 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 12 states have internal predecessors, (78), 4 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-13 01:16:01,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:16:01,933 INFO L93 Difference]: Finished difference Result 20786 states and 27151 transitions. [2021-10-13 01:16:01,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 01:16:01,934 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 12 states have internal predecessors, (78), 4 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2021-10-13 01:16:01,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:16:02,009 INFO L225 Difference]: With dead ends: 20786 [2021-10-13 01:16:02,009 INFO L226 Difference]: Without dead ends: 19891 [2021-10-13 01:16:02,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1010.9ms TimeCoverageRelationStatistics Valid=242, Invalid=1090, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 01:16:02,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19891 states. [2021-10-13 01:16:02,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19891 to 18204. [2021-10-13 01:16:02,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18204 states, 14593 states have (on average 1.2843829233193997) internal successors, (18743), 16269 states have internal predecessors, (18743), 1404 states have call successors, (1404), 1214 states have call predecessors, (1404), 2196 states have return successors, (3836), 721 states have call predecessors, (3836), 1403 states have call successors, (3836) [2021-10-13 01:16:02,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18204 states to 18204 states and 23983 transitions. [2021-10-13 01:16:02,618 INFO L78 Accepts]: Start accepts. Automaton has 18204 states and 23983 transitions. Word has length 86 [2021-10-13 01:16:02,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:16:02,618 INFO L470 AbstractCegarLoop]: Abstraction has 18204 states and 23983 transitions. [2021-10-13 01:16:02,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 12 states have internal predecessors, (78), 4 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-13 01:16:02,619 INFO L276 IsEmpty]: Start isEmpty. Operand 18204 states and 23983 transitions. [2021-10-13 01:16:02,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-13 01:16:02,623 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:16:02,623 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:16:02,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-13 01:16:02,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-13 01:16:02,845 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:16:02,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:16:02,845 INFO L82 PathProgramCache]: Analyzing trace with hash -616739140, now seen corresponding path program 1 times [2021-10-13 01:16:02,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:16:02,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850182816] [2021-10-13 01:16:02,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:16:02,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:16:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:02,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:16:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:03,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:16:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:03,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:16:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:03,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-13 01:16:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:03,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-10-13 01:16:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:03,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-10-13 01:16:03,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:03,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-10-13 01:16:03,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 70 proven. 42 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-10-13 01:16:03,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:16:03,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850182816] [2021-10-13 01:16:03,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850182816] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:16:03,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918656567] [2021-10-13 01:16:03,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:16:03,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:16:03,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:16:03,169 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:16:03,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 01:16:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:03,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-13 01:16:03,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:16:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 108 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-13 01:16:04,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918656567] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:16:04,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:16:04,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-10-13 01:16:04,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865505127] [2021-10-13 01:16:04,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 01:16:04,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:16:04,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 01:16:04,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-10-13 01:16:04,393 INFO L87 Difference]: Start difference. First operand 18204 states and 23983 transitions. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 15 states have internal predecessors, (93), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-10-13 01:16:07,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:16:07,245 INFO L93 Difference]: Finished difference Result 13417 states and 17122 transitions. [2021-10-13 01:16:07,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-13 01:16:07,246 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 15 states have internal predecessors, (93), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 92 [2021-10-13 01:16:07,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:16:07,274 INFO L225 Difference]: With dead ends: 13417 [2021-10-13 01:16:07,275 INFO L226 Difference]: Without dead ends: 12804 [2021-10-13 01:16:07,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1692.4ms TimeCoverageRelationStatistics Valid=390, Invalid=2262, Unknown=0, NotChecked=0, Total=2652 [2021-10-13 01:16:07,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12804 states. [2021-10-13 01:16:07,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12804 to 12620. [2021-10-13 01:16:07,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12620 states, 10074 states have (on average 1.2790351399642645) internal successors, (12885), 11210 states have internal predecessors, (12885), 988 states have call successors, (988), 899 states have call predecessors, (988), 1547 states have return successors, (2458), 511 states have call predecessors, (2458), 987 states have call successors, (2458) [2021-10-13 01:16:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12620 states to 12620 states and 16331 transitions. [2021-10-13 01:16:07,585 INFO L78 Accepts]: Start accepts. Automaton has 12620 states and 16331 transitions. Word has length 92 [2021-10-13 01:16:07,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:16:07,586 INFO L470 AbstractCegarLoop]: Abstraction has 12620 states and 16331 transitions. [2021-10-13 01:16:07,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 15 states have internal predecessors, (93), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-10-13 01:16:07,586 INFO L276 IsEmpty]: Start isEmpty. Operand 12620 states and 16331 transitions. [2021-10-13 01:16:07,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-13 01:16:07,590 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:16:07,590 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 5, 5, 5, 5, 4, 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, 1, 1] [2021-10-13 01:16:07,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-13 01:16:07,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:16:07,813 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:16:07,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:16:07,813 INFO L82 PathProgramCache]: Analyzing trace with hash 259058990, now seen corresponding path program 1 times [2021-10-13 01:16:07,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:16:07,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099104185] [2021-10-13 01:16:07,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:16:07,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:16:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:08,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:16:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:08,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:16:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:08,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:16:08,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:08,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-13 01:16:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:08,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-13 01:16:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:08,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-10-13 01:16:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:08,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-10-13 01:16:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:08,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-10-13 01:16:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 36 proven. 80 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-13 01:16:08,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:16:08,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099104185] [2021-10-13 01:16:08,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099104185] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:16:08,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088750] [2021-10-13 01:16:08,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:16:08,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:16:08,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:16:08,269 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:16:08,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-13 01:16:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:09,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-13 01:16:09,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:16:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 108 proven. 33 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-10-13 01:16:10,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088750] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:16:10,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:16:10,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-10-13 01:16:10,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159694350] [2021-10-13 01:16:10,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 01:16:10,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:16:10,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 01:16:10,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-10-13 01:16:10,183 INFO L87 Difference]: Start difference. First operand 12620 states and 16331 transitions. Second operand has 22 states, 21 states have (on average 4.619047619047619) internal successors, (97), 19 states have internal predecessors, (97), 7 states have call successors, (14), 10 states have call predecessors, (14), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-10-13 01:16:17,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:16:17,455 INFO L93 Difference]: Finished difference Result 21726 states and 27863 transitions. [2021-10-13 01:16:17,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-10-13 01:16:17,456 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.619047619047619) internal successors, (97), 19 states have internal predecessors, (97), 7 states have call successors, (14), 10 states have call predecessors, (14), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 95 [2021-10-13 01:16:17,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:16:17,527 INFO L225 Difference]: With dead ends: 21726 [2021-10-13 01:16:17,528 INFO L226 Difference]: Without dead ends: 21592 [2021-10-13 01:16:17,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 4678.4ms TimeCoverageRelationStatistics Valid=1246, Invalid=5726, Unknown=0, NotChecked=0, Total=6972 [2021-10-13 01:16:17,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21592 states. [2021-10-13 01:16:18,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21592 to 20891. [2021-10-13 01:16:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20891 states, 16726 states have (on average 1.2621068994380007) internal successors, (21110), 18565 states have internal predecessors, (21110), 1608 states have call successors, (1608), 1485 states have call predecessors, (1608), 2546 states have return successors, (4151), 841 states have call predecessors, (4151), 1607 states have call successors, (4151) [2021-10-13 01:16:18,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20891 states to 20891 states and 26869 transitions. [2021-10-13 01:16:18,098 INFO L78 Accepts]: Start accepts. Automaton has 20891 states and 26869 transitions. Word has length 95 [2021-10-13 01:16:18,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:16:18,099 INFO L470 AbstractCegarLoop]: Abstraction has 20891 states and 26869 transitions. [2021-10-13 01:16:18,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.619047619047619) internal successors, (97), 19 states have internal predecessors, (97), 7 states have call successors, (14), 10 states have call predecessors, (14), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-10-13 01:16:18,099 INFO L276 IsEmpty]: Start isEmpty. Operand 20891 states and 26869 transitions. [2021-10-13 01:16:18,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-13 01:16:18,107 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:16:18,107 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 8, 6, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:16:18,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-13 01:16:18,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:16:18,326 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:16:18,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:16:18,326 INFO L82 PathProgramCache]: Analyzing trace with hash 756702157, now seen corresponding path program 1 times [2021-10-13 01:16:18,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:16:18,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806221074] [2021-10-13 01:16:18,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:16:18,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:16:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:18,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:16:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:18,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:16:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:18,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:16:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:18,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-13 01:16:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:18,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-13 01:16:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:18,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-10-13 01:16:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:18,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-10-13 01:16:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:18,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-10-13 01:16:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:18,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-10-13 01:16:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:18,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-10-13 01:16:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 97 proven. 4 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-10-13 01:16:18,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:16:18,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806221074] [2021-10-13 01:16:18,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806221074] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:16:18,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14658627] [2021-10-13 01:16:18,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:16:18,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:16:18,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:16:18,690 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:16:18,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 01:16:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:19,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 01:16:19,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:16:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 91 proven. 62 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-10-13 01:16:20,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14658627] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:16:20,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:16:20,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-10-13 01:16:20,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078478803] [2021-10-13 01:16:20,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 01:16:20,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:16:20,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 01:16:20,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-10-13 01:16:20,133 INFO L87 Difference]: Start difference. First operand 20891 states and 26869 transitions. Second operand has 18 states, 18 states have (on average 5.888888888888889) internal successors, (106), 14 states have internal predecessors, (106), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-10-13 01:16:23,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:16:23,059 INFO L93 Difference]: Finished difference Result 26244 states and 33478 transitions. [2021-10-13 01:16:23,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-13 01:16:23,060 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.888888888888889) internal successors, (106), 14 states have internal predecessors, (106), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 118 [2021-10-13 01:16:23,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:16:23,141 INFO L225 Difference]: With dead ends: 26244 [2021-10-13 01:16:23,141 INFO L226 Difference]: Without dead ends: 26082 [2021-10-13 01:16:23,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 2004.2ms TimeCoverageRelationStatistics Valid=490, Invalid=2480, Unknown=0, NotChecked=0, Total=2970 [2021-10-13 01:16:23,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26082 states. [2021-10-13 01:16:23,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26082 to 25019. [2021-10-13 01:16:23,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25019 states, 19786 states have (on average 1.2359749317699384) internal successors, (24455), 22050 states have internal predecessors, (24455), 2142 states have call successors, (2142), 1850 states have call predecessors, (2142), 3080 states have return successors, (5385), 1119 states have call predecessors, (5385), 2141 states have call successors, (5385) [2021-10-13 01:16:23,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25019 states to 25019 states and 31982 transitions. [2021-10-13 01:16:23,744 INFO L78 Accepts]: Start accepts. Automaton has 25019 states and 31982 transitions. Word has length 118 [2021-10-13 01:16:23,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:16:23,745 INFO L470 AbstractCegarLoop]: Abstraction has 25019 states and 31982 transitions. [2021-10-13 01:16:23,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.888888888888889) internal successors, (106), 14 states have internal predecessors, (106), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-10-13 01:16:23,745 INFO L276 IsEmpty]: Start isEmpty. Operand 25019 states and 31982 transitions. [2021-10-13 01:16:23,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-10-13 01:16:23,757 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:16:23,757 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 9, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:16:23,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-13 01:16:23,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-13 01:16:23,973 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:16:23,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:16:23,973 INFO L82 PathProgramCache]: Analyzing trace with hash -607088145, now seen corresponding path program 1 times [2021-10-13 01:16:23,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:16:23,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695011465] [2021-10-13 01:16:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:16:23,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:16:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:16:24,070 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 01:16:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:16:24,200 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 01:16:24,200 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 01:16:24,202 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-10-13 01:16:24,204 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr0REQUIRES_VIOLATION [2021-10-13 01:16:24,204 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr1REQUIRES_VIOLATION [2021-10-13 01:16:24,205 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr2REQUIRES_VIOLATION [2021-10-13 01:16:24,205 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr3REQUIRES_VIOLATION [2021-10-13 01:16:24,205 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr4REQUIRES_VIOLATION [2021-10-13 01:16:24,205 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr5REQUIRES_VIOLATION [2021-10-13 01:16:24,206 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr6REQUIRES_VIOLATION [2021-10-13 01:16:24,206 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr7REQUIRES_VIOLATION [2021-10-13 01:16:24,206 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr0REQUIRES_VIOLATION [2021-10-13 01:16:24,206 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr1REQUIRES_VIOLATION [2021-10-13 01:16:24,206 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr2REQUIRES_VIOLATION [2021-10-13 01:16:24,207 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr3REQUIRES_VIOLATION [2021-10-13 01:16:24,207 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr4REQUIRES_VIOLATION [2021-10-13 01:16:24,207 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr5REQUIRES_VIOLATION [2021-10-13 01:16:24,207 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-13 01:16:24,208 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-13 01:16:24,208 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:16:24,208 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:16:24,208 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:16:24,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-13 01:16:24,216 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 01:16:24,272 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-13 01:16:24,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 01:16:24 BoogieIcfgContainer [2021-10-13 01:16:24,370 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 01:16:24,371 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 01:16:24,371 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 01:16:24,372 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 01:16:24,372 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:15:00" (3/4) ... [2021-10-13 01:16:24,377 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 01:16:24,377 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 01:16:24,379 INFO L168 Benchmark]: Toolchain (without parser) took 86030.11 ms. Allocated memory was 90.2 MB in the beginning and 1.6 GB in the end (delta: 1.5 GB). Free memory was 53.7 MB in the beginning and 399.6 MB in the end (delta: -345.8 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.1 GB. [2021-10-13 01:16:24,380 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 90.2 MB. Free memory is still 71.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:16:24,381 INFO L168 Benchmark]: CACSL2BoogieTranslator took 729.22 ms. Allocated memory is still 90.2 MB. Free memory was 53.5 MB in the beginning and 60.8 MB in the end (delta: -7.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 01:16:24,381 INFO L168 Benchmark]: Boogie Preprocessor took 127.48 ms. Allocated memory is still 90.2 MB. Free memory was 60.8 MB in the beginning and 57.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 01:16:24,382 INFO L168 Benchmark]: RCFGBuilder took 905.62 ms. Allocated memory is still 90.2 MB. Free memory was 57.8 MB in the beginning and 64.0 MB in the end (delta: -6.2 MB). Peak memory consumption was 24.7 MB. Max. memory is 16.1 GB. [2021-10-13 01:16:24,382 INFO L168 Benchmark]: TraceAbstraction took 84240.50 ms. Allocated memory was 90.2 MB in the beginning and 1.6 GB in the end (delta: 1.5 GB). Free memory was 63.3 MB in the beginning and 400.6 MB in the end (delta: -337.3 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.1 GB. [2021-10-13 01:16:24,383 INFO L168 Benchmark]: Witness Printer took 6.58 ms. Allocated memory is still 1.6 GB. Free memory was 400.6 MB in the beginning and 399.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 01:16:24,387 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 90.2 MB. Free memory is still 71.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 729.22 ms. Allocated memory is still 90.2 MB. Free memory was 53.5 MB in the beginning and 60.8 MB in the end (delta: -7.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 127.48 ms. Allocated memory is still 90.2 MB. Free memory was 60.8 MB in the beginning and 57.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 905.62 ms. Allocated memory is still 90.2 MB. Free memory was 57.8 MB in the beginning and 64.0 MB in the end (delta: -6.2 MB). Peak memory consumption was 24.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 84240.50 ms. Allocated memory was 90.2 MB in the beginning and 1.6 GB in the end (delta: 1.5 GB). Free memory was 63.3 MB in the beginning and 400.6 MB in the end (delta: -337.3 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.1 GB. * Witness Printer took 6.58 ms. Allocated memory is still 1.6 GB. Free memory was 400.6 MB in the beginning and 399.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [\old(garbage)=54, \old(garbage)=49, \old(pc1)=67, \old(pc4)=50, \old(res4)=60, \old(S)=55, \old(S)=57, \old(t1)=70, \old(t1)=62, \old(t4)=58, \old(t4)=53, \old(x1)=61, \old(x1)=74, \old(x4)=51, \old(x4)=68, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, __VERIFIER_nondet_int()=1, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L542] x1->data = 4 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=3, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L545] t1 = S VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=3, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc1++=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L548] x1->next = t1 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L551] COND TRUE S == t1 [L552] S = x1 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=1, res4=0, S={-1:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L569] t4 = S VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=-1, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=2, pc4++=1, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L598] RET pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=2, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=2, res4=0, S={-1:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=2, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=-1, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=2, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L571] case 2: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=2, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=-1, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=3, pc4++=2, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L572] COND FALSE !(t4 == ((void *)0)) VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=2, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=-1, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=3, pc4++=2, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L598] RET pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=3, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=3, res4=0, S={-1:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=3, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=-1, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=3, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L571] case 2: [L575] case 3: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=3, \old(res4)=0, \old(S)=0, \old(S)=-1, \old(t1)=0, \old(t1)=0, \old(t4)=-1, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=4, pc4++=3, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L576] EXPR t4->next VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=3, \old(res4)=0, \old(S)=0, \old(S)=-1, \old(t1)=0, \old(t1)=0, \old(t4)=-1, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=4, pc4++=3, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, t4->next={0:0}, x1={-1:0}, x4={0:0}] [L576] x4 = t4->next [L598] RET pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=4, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=4, res4=0, S={-1:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=4, \old(res4)=0, \old(S)=0, \old(S)=-1, \old(t1)=0, \old(t1)=0, \old(t4)=-1, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=4, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L571] case 2: [L575] case 3: [L578] case 4: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=4, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=-1, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=5, pc4++=4, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L579] COND TRUE S == t4 [L580] S = x4 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=4, \old(res4)=0, \old(S)=0, \old(S)=-1, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=-1, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=5, pc4++=4, res4=0, S={0:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L598] RET pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=5, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=6, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: [L556] case 6: [L557] pc1 = 1 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=6, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc1++=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, __VERIFIER_nondet_int()=0, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=0, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] COND FALSE !(S || 1 != pc1 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, \result=0, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 92 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 83968.0ms, OverallIterations: 28, TraceHistogramMax: 11, EmptinessCheckTime: 109.4ms, AutomataDifference: 49639.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2610 SDtfs, 9650 SDslu, 6262 SDs, 0 SdLazy, 21611 SolverSat, 3963 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18221.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2366 GetRequests, 1507 SyntacticMatches, 6 SemanticMatches, 853 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18139 ImplicationChecksByTransitivity, 29207.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25019occurred in iteration=27, InterpolantAutomatonStates: 737, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 7198.9ms AutomataMinimizationTime, 27 MinimizatonAttempts, 27612 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 635.9ms SsaConstructionTime, 1995.1ms SatisfiabilityAnalysisTime, 13811.1ms InterpolantComputationTime, 2592 NumberOfCodeBlocks, 2592 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 2416 ConstructedInterpolants, 10 QuantifiedInterpolants, 11863 SizeOfPredicates, 78 NumberOfNonLiveVariables, 10163 ConjunctsInSsa, 373 ConjunctsInUnsatCore, 45 InterpolantComputations, 9 PerfectInterpolantSequences, 2905/3662 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-13 01:16:24,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 01:16:27,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 01:16:27,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 01:16:27,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 01:16:27,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 01:16:27,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 01:16:27,399 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 01:16:27,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 01:16:27,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 01:16:27,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 01:16:27,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 01:16:27,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 01:16:27,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 01:16:27,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 01:16:27,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 01:16:27,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 01:16:27,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 01:16:27,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 01:16:27,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 01:16:27,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 01:16:27,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 01:16:27,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 01:16:27,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 01:16:27,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 01:16:27,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 01:16:27,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 01:16:27,481 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 01:16:27,483 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 01:16:27,484 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 01:16:27,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 01:16:27,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 01:16:27,488 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 01:16:27,491 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 01:16:27,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 01:16:27,495 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 01:16:27,495 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 01:16:27,496 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 01:16:27,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 01:16:27,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 01:16:27,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 01:16:27,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 01:16:27,507 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-13 01:16:27,545 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 01:16:27,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 01:16:27,546 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 01:16:27,547 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 01:16:27,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 01:16:27,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 01:16:27,549 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 01:16:27,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 01:16:27,550 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 01:16:27,550 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 01:16:27,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 01:16:27,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 01:16:27,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 01:16:27,551 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 01:16:27,551 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 01:16:27,552 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 01:16:27,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 01:16:27,552 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 01:16:27,552 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 01:16:27,553 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 01:16:27,553 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 01:16:27,553 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 01:16:27,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 01:16:27,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 01:16:27,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 01:16:27,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:16:27,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 01:16:27,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 01:16:27,555 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 01:16:27,555 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 01:16:27,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 01:16:27,556 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 01:16:27,556 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39b25c4e2cc4769f7c060343bf6a1efac7abb2b9 [2021-10-13 01:16:28,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 01:16:28,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 01:16:28,057 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 01:16:28,059 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 01:16:28,060 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 01:16:28,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/memsafety/lockfree-3.3.i [2021-10-13 01:16:28,156 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/data/1ba6f5a99/c30bcc7879e4456a894b2605917764dd/FLAGf829212c0 [2021-10-13 01:16:28,876 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 01:16:28,881 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/sv-benchmarks/c/memsafety/lockfree-3.3.i [2021-10-13 01:16:28,907 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/data/1ba6f5a99/c30bcc7879e4456a894b2605917764dd/FLAGf829212c0 [2021-10-13 01:16:29,117 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/data/1ba6f5a99/c30bcc7879e4456a894b2605917764dd [2021-10-13 01:16:29,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 01:16:29,122 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 01:16:29,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 01:16:29,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 01:16:29,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 01:16:29,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:16:29" (1/1) ... [2021-10-13 01:16:29,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1112b1af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:16:29, skipping insertion in model container [2021-10-13 01:16:29,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:16:29" (1/1) ... [2021-10-13 01:16:29,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 01:16:29,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 01:16:29,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:16:29,665 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 01:16:29,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:16:29,779 INFO L208 MainTranslator]: Completed translation [2021-10-13 01:16:29,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:16:29 WrapperNode [2021-10-13 01:16:29,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 01:16:29,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 01:16:29,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 01:16:29,783 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 01:16:29,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:16:29" (1/1) ... [2021-10-13 01:16:29,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:16:29" (1/1) ... [2021-10-13 01:16:29,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:16:29" (1/1) ... [2021-10-13 01:16:29,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:16:29" (1/1) ... [2021-10-13 01:16:29,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:16:29" (1/1) ... [2021-10-13 01:16:29,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:16:29" (1/1) ... [2021-10-13 01:16:29,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:16:29" (1/1) ... [2021-10-13 01:16:29,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 01:16:29,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 01:16:29,894 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 01:16:29,894 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 01:16:29,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:16:29" (1/1) ... [2021-10-13 01:16:29,905 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:16:29,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:16:29,935 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 01:16:29,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 01:16:30,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-13 01:16:30,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 01:16:30,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-13 01:16:30,006 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-13 01:16:30,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-13 01:16:30,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-13 01:16:30,008 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-13 01:16:30,008 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-13 01:16:30,009 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-13 01:16:30,009 INFO L138 BoogieDeclarations]: Found implementation of procedure push [2021-10-13 01:16:30,009 INFO L138 BoogieDeclarations]: Found implementation of procedure pop [2021-10-13 01:16:30,010 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-13 01:16:30,010 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-13 01:16:30,010 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-13 01:16:30,010 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-13 01:16:30,011 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-13 01:16:30,011 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-13 01:16:30,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 01:16:30,011 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-13 01:16:30,011 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-13 01:16:30,012 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-13 01:16:30,012 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-13 01:16:30,012 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-13 01:16:30,012 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-13 01:16:30,012 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-13 01:16:30,013 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-13 01:16:30,014 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-13 01:16:30,014 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-13 01:16:30,014 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-13 01:16:30,014 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-13 01:16:30,015 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-13 01:16:30,015 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-13 01:16:30,015 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-13 01:16:30,015 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-13 01:16:30,015 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-13 01:16:30,016 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-13 01:16:30,016 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-13 01:16:30,016 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-13 01:16:30,016 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-13 01:16:30,016 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-13 01:16:30,017 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-13 01:16:30,017 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-13 01:16:30,017 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-13 01:16:30,017 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-13 01:16:30,017 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-13 01:16:30,018 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-13 01:16:30,019 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-13 01:16:30,019 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-13 01:16:30,020 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-13 01:16:30,020 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-13 01:16:30,020 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-13 01:16:30,021 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-13 01:16:30,021 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-13 01:16:30,021 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-13 01:16:30,022 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-13 01:16:30,022 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-13 01:16:30,022 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-13 01:16:30,022 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-13 01:16:30,022 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-13 01:16:30,023 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-13 01:16:30,023 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-13 01:16:30,023 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-13 01:16:30,023 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-13 01:16:30,024 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-13 01:16:30,024 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-13 01:16:30,026 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-13 01:16:30,026 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-13 01:16:30,028 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-13 01:16:30,029 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-13 01:16:30,029 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-13 01:16:30,029 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-13 01:16:30,030 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-13 01:16:30,030 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-13 01:16:30,030 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-13 01:16:30,030 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-13 01:16:30,031 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-13 01:16:30,032 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-13 01:16:30,032 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-13 01:16:30,032 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-13 01:16:30,032 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-13 01:16:30,032 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-13 01:16:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-13 01:16:30,040 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-13 01:16:30,040 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-13 01:16:30,040 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-13 01:16:30,040 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-13 01:16:30,041 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-13 01:16:30,041 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-13 01:16:30,041 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-13 01:16:30,041 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-13 01:16:30,041 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-13 01:16:30,042 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-13 01:16:30,042 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-13 01:16:30,042 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-13 01:16:30,042 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-13 01:16:30,042 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-13 01:16:30,043 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-13 01:16:30,043 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-13 01:16:30,043 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-13 01:16:30,043 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-13 01:16:30,044 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-13 01:16:30,045 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-13 01:16:30,045 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-13 01:16:30,046 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-13 01:16:30,046 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-13 01:16:30,046 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-13 01:16:30,046 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-13 01:16:30,047 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-13 01:16:30,047 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-13 01:16:30,048 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-13 01:16:30,049 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-13 01:16:30,049 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-13 01:16:30,049 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-13 01:16:30,049 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-13 01:16:30,049 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-13 01:16:30,050 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-13 01:16:30,050 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-13 01:16:30,050 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-13 01:16:30,050 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-13 01:16:30,050 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-13 01:16:30,051 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-13 01:16:30,051 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-13 01:16:30,052 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-13 01:16:30,052 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-13 01:16:30,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-13 01:16:30,053 INFO L130 BoogieDeclarations]: Found specification of procedure push [2021-10-13 01:16:30,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 01:16:30,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 01:16:30,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 01:16:30,058 INFO L130 BoogieDeclarations]: Found specification of procedure pop [2021-10-13 01:16:30,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 01:16:30,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 01:16:30,060 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-13 01:16:30,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 01:16:30,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-13 01:16:30,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 01:16:30,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 01:16:30,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-13 01:16:30,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-13 01:16:30,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-13 01:16:31,061 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 01:16:31,062 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-13 01:16:31,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:16:31 BoogieIcfgContainer [2021-10-13 01:16:31,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 01:16:31,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 01:16:31,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 01:16:31,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 01:16:31,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:16:29" (1/3) ... [2021-10-13 01:16:31,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77963157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:16:31, skipping insertion in model container [2021-10-13 01:16:31,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:16:29" (2/3) ... [2021-10-13 01:16:31,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77963157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:16:31, skipping insertion in model container [2021-10-13 01:16:31,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:16:31" (3/3) ... [2021-10-13 01:16:31,074 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.3.i [2021-10-13 01:16:31,081 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 01:16:31,081 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-13 01:16:31,138 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 01:16:31,151 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 01:16:31,152 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-13 01:16:31,172 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 65 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:16:31,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 01:16:31,182 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:16:31,186 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:16:31,186 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:16:31,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:16:31,197 INFO L82 PathProgramCache]: Analyzing trace with hash 913050877, now seen corresponding path program 1 times [2021-10-13 01:16:31,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:16:31,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322292356] [2021-10-13 01:16:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:16:31,221 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:16:31,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:16:31,223 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:16:31,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 01:16:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:31,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 01:16:31,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:16:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:31,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:16:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:31,560 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:16:31,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322292356] [2021-10-13 01:16:31,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322292356] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:16:31,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:16:31,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 01:16:31,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820568772] [2021-10-13 01:16:31,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 01:16:31,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:16:31,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 01:16:31,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 01:16:31,589 INFO L87 Difference]: Start difference. First operand has 72 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 65 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-13 01:16:31,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:16:31,612 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2021-10-13 01:16:31,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 01:16:31,613 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 8 [2021-10-13 01:16:31,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:16:31,627 INFO L225 Difference]: With dead ends: 72 [2021-10-13 01:16:31,627 INFO L226 Difference]: Without dead ends: 69 [2021-10-13 01:16:31,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 01:16:31,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-13 01:16:31,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-13 01:16:31,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 63 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:16:31,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2021-10-13 01:16:31,679 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 8 [2021-10-13 01:16:31,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:16:31,679 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2021-10-13 01:16:31,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-13 01:16:31,680 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2021-10-13 01:16:31,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 01:16:31,681 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:16:31,681 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:16:31,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 01:16:31,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:16:31,885 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:16:31,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:16:31,886 INFO L82 PathProgramCache]: Analyzing trace with hash 913039345, now seen corresponding path program 1 times [2021-10-13 01:16:31,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:16:31,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285623794] [2021-10-13 01:16:31,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:16:31,888 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:16:31,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:16:31,890 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:16:31,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 01:16:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:32,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 01:16:32,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:16:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:32,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:16:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:32,512 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:16:32,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285623794] [2021-10-13 01:16:32,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285623794] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:16:32,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:16:32,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 01:16:32,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907369549] [2021-10-13 01:16:32,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 01:16:32,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:16:32,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 01:16:32,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 01:16:32,519 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:16:32,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:16:32,617 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2021-10-13 01:16:32,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 01:16:32,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-10-13 01:16:32,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:16:32,623 INFO L225 Difference]: With dead ends: 120 [2021-10-13 01:16:32,623 INFO L226 Difference]: Without dead ends: 120 [2021-10-13 01:16:32,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 01:16:32,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-13 01:16:32,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2021-10-13 01:16:32,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 71 states have (on average 1.8732394366197183) internal successors, (133), 93 states have internal predecessors, (133), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-13 01:16:32,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 145 transitions. [2021-10-13 01:16:32,648 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 145 transitions. Word has length 8 [2021-10-13 01:16:32,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:16:32,648 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 145 transitions. [2021-10-13 01:16:32,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:16:32,649 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 145 transitions. [2021-10-13 01:16:32,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 01:16:32,650 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:16:32,650 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:16:32,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 01:16:32,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:16:32,869 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:16:32,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:16:32,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1760552785, now seen corresponding path program 1 times [2021-10-13 01:16:32,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:16:32,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108567832] [2021-10-13 01:16:32,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:16:32,872 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:16:32,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:16:32,874 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:16:32,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 01:16:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:33,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 01:16:33,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:16:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:33,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:16:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:33,229 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:16:33,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108567832] [2021-10-13 01:16:33,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108567832] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:16:33,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:16:33,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 01:16:33,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216477708] [2021-10-13 01:16:33,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 01:16:33,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:16:33,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 01:16:33,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 01:16:33,240 INFO L87 Difference]: Start difference. First operand 102 states and 145 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:16:33,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:16:33,428 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2021-10-13 01:16:33,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 01:16:33,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-10-13 01:16:33,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:16:33,432 INFO L225 Difference]: With dead ends: 128 [2021-10-13 01:16:33,432 INFO L226 Difference]: Without dead ends: 125 [2021-10-13 01:16:33,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 01:16:33,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-13 01:16:33,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2021-10-13 01:16:33,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 78 states have (on average 1.8333333333333333) internal successors, (143), 104 states have internal predecessors, (143), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-13 01:16:33,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 168 transitions. [2021-10-13 01:16:33,473 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 168 transitions. Word has length 9 [2021-10-13 01:16:33,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:16:33,474 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 168 transitions. [2021-10-13 01:16:33,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:16:33,474 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 168 transitions. [2021-10-13 01:16:33,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 01:16:33,475 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:16:33,475 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:16:33,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 01:16:33,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:16:33,695 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:16:33,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:16:33,696 INFO L82 PathProgramCache]: Analyzing trace with hash 370381771, now seen corresponding path program 1 times [2021-10-13 01:16:33,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:16:33,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865647595] [2021-10-13 01:16:33,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:16:33,697 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:16:33,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:16:33,699 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:16:33,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 01:16:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:33,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 01:16:33,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:16:33,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 01:16:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:34,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:16:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:34,063 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:16:34,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865647595] [2021-10-13 01:16:34,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1865647595] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:16:34,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:16:34,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 01:16:34,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549228113] [2021-10-13 01:16:34,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 01:16:34,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:16:34,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 01:16:34,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 01:16:34,067 INFO L87 Difference]: Start difference. First operand 115 states and 168 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:16:34,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:16:34,270 INFO L93 Difference]: Finished difference Result 198 states and 290 transitions. [2021-10-13 01:16:34,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 01:16:34,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 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 11 [2021-10-13 01:16:34,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:16:34,277 INFO L225 Difference]: With dead ends: 198 [2021-10-13 01:16:34,277 INFO L226 Difference]: Without dead ends: 198 [2021-10-13 01:16:34,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 01:16:34,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-10-13 01:16:34,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 177. [2021-10-13 01:16:34,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 134 states have (on average 1.7761194029850746) internal successors, (238), 160 states have internal predecessors, (238), 14 states have call successors, (14), 10 states have call predecessors, (14), 11 states have return successors, (24), 7 states have call predecessors, (24), 13 states have call successors, (24) [2021-10-13 01:16:34,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 276 transitions. [2021-10-13 01:16:34,322 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 276 transitions. Word has length 11 [2021-10-13 01:16:34,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:16:34,322 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 276 transitions. [2021-10-13 01:16:34,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:16:34,323 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 276 transitions. [2021-10-13 01:16:34,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 01:16:34,323 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:16:34,324 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:16:34,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 01:16:34,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:16:34,545 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting pushErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:16:34,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:16:34,546 INFO L82 PathProgramCache]: Analyzing trace with hash 370381772, now seen corresponding path program 1 times [2021-10-13 01:16:34,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:16:34,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698309956] [2021-10-13 01:16:34,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:16:34,547 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:16:34,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:16:34,549 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:16:34,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 01:16:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:34,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 01:16:34,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:16:34,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 01:16:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:34,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:16:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:34,916 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:16:34,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698309956] [2021-10-13 01:16:34,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698309956] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:16:34,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:16:34,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 01:16:34,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846629504] [2021-10-13 01:16:34,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:16:34,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:16:34,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:16:34,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:16:34,919 INFO L87 Difference]: Start difference. First operand 177 states and 276 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:16:35,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:16:35,313 INFO L93 Difference]: Finished difference Result 333 states and 499 transitions. [2021-10-13 01:16:35,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 01:16:35,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 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 11 [2021-10-13 01:16:35,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:16:35,320 INFO L225 Difference]: With dead ends: 333 [2021-10-13 01:16:35,320 INFO L226 Difference]: Without dead ends: 333 [2021-10-13 01:16:35,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:16:35,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-10-13 01:16:35,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 295. [2021-10-13 01:16:35,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 242 states have (on average 1.7314049586776858) internal successors, (419), 268 states have internal predecessors, (419), 18 states have call successors, (18), 18 states have call predecessors, (18), 19 states have return successors, (35), 9 states have call predecessors, (35), 17 states have call successors, (35) [2021-10-13 01:16:35,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 472 transitions. [2021-10-13 01:16:35,383 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 472 transitions. Word has length 11 [2021-10-13 01:16:35,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:16:35,383 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 472 transitions. [2021-10-13 01:16:35,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:16:35,384 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 472 transitions. [2021-10-13 01:16:35,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 01:16:35,385 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:16:35,385 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:16:35,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 01:16:35,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:16:35,600 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting pushErr4REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:16:35,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:16:35,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1403059964, now seen corresponding path program 1 times [2021-10-13 01:16:35,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:16:35,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [192664373] [2021-10-13 01:16:35,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:16:35,601 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:16:35,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:16:35,603 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:16:35,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 01:16:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:35,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 01:16:35,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:16:35,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:35,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:16:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:35,980 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:16:35,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [192664373] [2021-10-13 01:16:35,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [192664373] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:16:35,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:16:35,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 01:16:35,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312745555] [2021-10-13 01:16:35,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:16:35,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:16:35,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:16:35,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:16:35,984 INFO L87 Difference]: Start difference. First operand 295 states and 472 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 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) [2021-10-13 01:16:36,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:16:36,036 INFO L93 Difference]: Finished difference Result 197 states and 283 transitions. [2021-10-13 01:16:36,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 01:16:36,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 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 12 [2021-10-13 01:16:36,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:16:36,040 INFO L225 Difference]: With dead ends: 197 [2021-10-13 01:16:36,040 INFO L226 Difference]: Without dead ends: 197 [2021-10-13 01:16:36,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:16:36,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-10-13 01:16:36,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 181. [2021-10-13 01:16:36,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 144 states have (on average 1.6736111111111112) internal successors, (241), 162 states have internal predecessors, (241), 12 states have call successors, (12), 12 states have call predecessors, (12), 13 states have return successors, (18), 7 states have call predecessors, (18), 11 states have call successors, (18) [2021-10-13 01:16:36,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 271 transitions. [2021-10-13 01:16:36,056 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 271 transitions. Word has length 12 [2021-10-13 01:16:36,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:16:36,056 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 271 transitions. [2021-10-13 01:16:36,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 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) [2021-10-13 01:16:36,057 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 271 transitions. [2021-10-13 01:16:36,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 01:16:36,058 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:16:36,058 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:16:36,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 01:16:36,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:16:36,277 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:16:36,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:16:36,277 INFO L82 PathProgramCache]: Analyzing trace with hash -2074754906, now seen corresponding path program 1 times [2021-10-13 01:16:36,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:16:36,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516616283] [2021-10-13 01:16:36,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:16:36,279 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:16:36,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:16:36,280 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:16:36,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 01:16:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:36,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 01:16:36,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:16:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:36,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:16:36,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:36,656 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:16:36,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516616283] [2021-10-13 01:16:36,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516616283] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:16:36,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:16:36,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 01:16:36,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109131202] [2021-10-13 01:16:36,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:16:36,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:16:36,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:16:36,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:16:36,659 INFO L87 Difference]: Start difference. First operand 181 states and 271 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 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) [2021-10-13 01:16:36,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:16:36,701 INFO L93 Difference]: Finished difference Result 297 states and 420 transitions. [2021-10-13 01:16:36,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 01:16:36,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 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 13 [2021-10-13 01:16:36,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:16:36,708 INFO L225 Difference]: With dead ends: 297 [2021-10-13 01:16:36,708 INFO L226 Difference]: Without dead ends: 297 [2021-10-13 01:16:36,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:16:36,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-10-13 01:16:36,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 281. [2021-10-13 01:16:36,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 216 states have (on average 1.5648148148148149) internal successors, (338), 246 states have internal predecessors, (338), 22 states have call successors, (22), 22 states have call predecessors, (22), 31 states have return successors, (44), 13 states have call predecessors, (44), 21 states have call successors, (44) [2021-10-13 01:16:36,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 404 transitions. [2021-10-13 01:16:36,723 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 404 transitions. Word has length 13 [2021-10-13 01:16:36,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:16:36,723 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 404 transitions. [2021-10-13 01:16:36,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 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) [2021-10-13 01:16:36,724 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 404 transitions. [2021-10-13 01:16:36,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 01:16:36,725 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:16:36,725 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:16:36,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 01:16:36,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:16:36,944 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:16:36,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:16:36,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1772709125, now seen corresponding path program 1 times [2021-10-13 01:16:36,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:16:36,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837168987] [2021-10-13 01:16:36,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:16:36,946 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:16:36,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:16:36,947 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:16:36,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 01:16:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:37,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 01:16:37,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:16:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:37,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:16:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:37,572 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:16:37,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837168987] [2021-10-13 01:16:37,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837168987] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 01:16:37,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:16:37,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-13 01:16:37,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820789617] [2021-10-13 01:16:37,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 01:16:37,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:16:37,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 01:16:37,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-13 01:16:37,575 INFO L87 Difference]: Start difference. First operand 281 states and 404 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-13 01:16:38,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:16:38,492 INFO L93 Difference]: Finished difference Result 690 states and 1010 transitions. [2021-10-13 01:16:38,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 01:16:38,493 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2021-10-13 01:16:38,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:16:38,499 INFO L225 Difference]: With dead ends: 690 [2021-10-13 01:16:38,500 INFO L226 Difference]: Without dead ends: 690 [2021-10-13 01:16:38,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 208.6ms TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-10-13 01:16:38,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-10-13 01:16:38,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 587. [2021-10-13 01:16:38,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 472 states have (on average 1.5423728813559323) internal successors, (728), 520 states have internal predecessors, (728), 42 states have call successors, (42), 42 states have call predecessors, (42), 61 states have return successors, (95), 25 states have call predecessors, (95), 41 states have call successors, (95) [2021-10-13 01:16:38,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 865 transitions. [2021-10-13 01:16:38,554 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 865 transitions. Word has length 18 [2021-10-13 01:16:38,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:16:38,555 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 865 transitions. [2021-10-13 01:16:38,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-13 01:16:38,555 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 865 transitions. [2021-10-13 01:16:38,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 01:16:38,557 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:16:38,557 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:16:38,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 01:16:38,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:16:38,772 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:16:38,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:16:38,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1092083902, now seen corresponding path program 1 times [2021-10-13 01:16:38,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:16:38,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038254675] [2021-10-13 01:16:38,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:16:38,774 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:16:38,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:16:38,775 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:16:38,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 01:16:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:39,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 01:16:39,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:16:39,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:39,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:16:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:39,413 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:16:39,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038254675] [2021-10-13 01:16:39,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038254675] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 01:16:39,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:16:39,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-10-13 01:16:39,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690533883] [2021-10-13 01:16:39,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 01:16:39,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:16:39,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 01:16:39,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 01:16:39,416 INFO L87 Difference]: Start difference. First operand 587 states and 865 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 01:16:40,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:16:40,223 INFO L93 Difference]: Finished difference Result 945 states and 1354 transitions. [2021-10-13 01:16:40,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 01:16:40,225 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2021-10-13 01:16:40,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:16:40,233 INFO L225 Difference]: With dead ends: 945 [2021-10-13 01:16:40,233 INFO L226 Difference]: Without dead ends: 945 [2021-10-13 01:16:40,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 261.8ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-10-13 01:16:40,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-10-13 01:16:40,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 837. [2021-10-13 01:16:40,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 666 states have (on average 1.509009009009009) internal successors, (1005), 738 states have internal predecessors, (1005), 62 states have call successors, (62), 62 states have call predecessors, (62), 97 states have return successors, (127), 37 states have call predecessors, (127), 61 states have call successors, (127) [2021-10-13 01:16:40,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1194 transitions. [2021-10-13 01:16:40,281 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1194 transitions. Word has length 20 [2021-10-13 01:16:40,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:16:40,281 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 1194 transitions. [2021-10-13 01:16:40,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 01:16:40,282 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1194 transitions. [2021-10-13 01:16:40,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 01:16:40,284 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:16:40,284 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:16:40,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 01:16:40,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:16:40,499 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:16:40,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:16:40,500 INFO L82 PathProgramCache]: Analyzing trace with hash -389155418, now seen corresponding path program 2 times [2021-10-13 01:16:40,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:16:40,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51574040] [2021-10-13 01:16:40,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 01:16:40,501 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:16:40,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:16:40,502 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:16:40,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 01:16:40,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 01:16:40,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:16:40,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 01:16:40,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:16:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 01:16:40,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:16:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 01:16:41,151 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:16:41,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51574040] [2021-10-13 01:16:41,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51574040] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 01:16:41,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:16:41,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-10-13 01:16:41,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766604141] [2021-10-13 01:16:41,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 01:16:41,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:16:41,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 01:16:41,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:16:41,155 INFO L87 Difference]: Start difference. First operand 837 states and 1194 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-13 01:16:41,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:16:41,435 INFO L93 Difference]: Finished difference Result 1191 states and 1639 transitions. [2021-10-13 01:16:41,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 01:16:41,438 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2021-10-13 01:16:41,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:16:41,447 INFO L225 Difference]: With dead ends: 1191 [2021-10-13 01:16:41,447 INFO L226 Difference]: Without dead ends: 1191 [2021-10-13 01:16:41,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 178.0ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-10-13 01:16:41,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-10-13 01:16:41,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1147. [2021-10-13 01:16:41,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 908 states have (on average 1.4515418502202644) internal successors, (1318), 1016 states have internal predecessors, (1318), 82 states have call successors, (82), 82 states have call predecessors, (82), 145 states have return successors, (195), 49 states have call predecessors, (195), 81 states have call successors, (195) [2021-10-13 01:16:41,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1595 transitions. [2021-10-13 01:16:41,504 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1595 transitions. Word has length 27 [2021-10-13 01:16:41,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:16:41,505 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 1595 transitions. [2021-10-13 01:16:41,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-13 01:16:41,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1595 transitions. [2021-10-13 01:16:41,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 01:16:41,513 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:16:41,513 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:16:41,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 01:16:41,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:16:41,730 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:16:41,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:16:41,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1024254868, now seen corresponding path program 1 times [2021-10-13 01:16:41,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:16:41,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441857161] [2021-10-13 01:16:41,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:16:41,731 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:16:41,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:16:41,732 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:16:41,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 01:16:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:42,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 01:16:42,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:16:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:42,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:16:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:42,982 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:16:42,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441857161] [2021-10-13 01:16:42,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441857161] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 01:16:42,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:16:42,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-10-13 01:16:42,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120988612] [2021-10-13 01:16:42,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 01:16:42,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:16:42,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 01:16:42,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-13 01:16:42,985 INFO L87 Difference]: Start difference. First operand 1147 states and 1595 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-13 01:16:43,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:16:43,997 INFO L93 Difference]: Finished difference Result 1680 states and 2292 transitions. [2021-10-13 01:16:43,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 01:16:43,998 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 29 [2021-10-13 01:16:43,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:16:44,013 INFO L225 Difference]: With dead ends: 1680 [2021-10-13 01:16:44,014 INFO L226 Difference]: Without dead ends: 1680 [2021-10-13 01:16:44,015 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 412.9ms TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-10-13 01:16:44,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2021-10-13 01:16:44,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1467. [2021-10-13 01:16:44,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1157 states have (on average 1.418323249783924) internal successors, (1641), 1297 states have internal predecessors, (1641), 107 states have call successors, (107), 107 states have call predecessors, (107), 191 states have return successors, (265), 63 states have call predecessors, (265), 106 states have call successors, (265) [2021-10-13 01:16:44,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 2013 transitions. [2021-10-13 01:16:44,089 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 2013 transitions. Word has length 29 [2021-10-13 01:16:44,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:16:44,090 INFO L470 AbstractCegarLoop]: Abstraction has 1467 states and 2013 transitions. [2021-10-13 01:16:44,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-13 01:16:44,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 2013 transitions. [2021-10-13 01:16:44,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 01:16:44,092 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:16:44,093 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:16:44,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 01:16:44,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:16:44,309 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:16:44,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:16:44,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1836404925, now seen corresponding path program 1 times [2021-10-13 01:16:44,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:16:44,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063754845] [2021-10-13 01:16:44,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:16:44,310 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:16:44,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:16:44,311 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:16:44,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 01:16:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:44,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 01:16:44,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:16:44,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:16:44,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:16:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:45,226 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:16:45,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063754845] [2021-10-13 01:16:45,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063754845] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 01:16:45,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:16:45,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2021-10-13 01:16:45,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513666892] [2021-10-13 01:16:45,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 01:16:45,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:16:45,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 01:16:45,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-13 01:16:45,228 INFO L87 Difference]: Start difference. First operand 1467 states and 2013 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-13 01:16:46,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:16:46,576 INFO L93 Difference]: Finished difference Result 1681 states and 2147 transitions. [2021-10-13 01:16:46,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 01:16:46,577 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2021-10-13 01:16:46,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:16:46,587 INFO L225 Difference]: With dead ends: 1681 [2021-10-13 01:16:46,587 INFO L226 Difference]: Without dead ends: 1497 [2021-10-13 01:16:46,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 596.4ms TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2021-10-13 01:16:46,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-10-13 01:16:46,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1379. [2021-10-13 01:16:46,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1071 states have (on average 1.38468720821662) internal successors, (1483), 1209 states have internal predecessors, (1483), 107 states have call successors, (107), 107 states have call predecessors, (107), 189 states have return successors, (237), 63 states have call predecessors, (237), 106 states have call successors, (237) [2021-10-13 01:16:46,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 1827 transitions. [2021-10-13 01:16:46,653 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 1827 transitions. Word has length 30 [2021-10-13 01:16:46,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:16:46,653 INFO L470 AbstractCegarLoop]: Abstraction has 1379 states and 1827 transitions. [2021-10-13 01:16:46,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-13 01:16:46,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 1827 transitions. [2021-10-13 01:16:46,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-13 01:16:46,658 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:16:46,658 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:16:46,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 01:16:46,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:16:46,878 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:16:46,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:16:46,879 INFO L82 PathProgramCache]: Analyzing trace with hash -746793865, now seen corresponding path program 2 times [2021-10-13 01:16:46,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:16:46,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189091911] [2021-10-13 01:16:46,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 01:16:46,879 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:16:46,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:16:46,880 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:16:46,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 01:16:47,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 01:16:47,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:16:47,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 01:16:47,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:16:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 01:16:47,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:16:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:16:47,894 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:16:47,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189091911] [2021-10-13 01:16:47,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189091911] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 01:16:47,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:16:47,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-10-13 01:16:47,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870154834] [2021-10-13 01:16:47,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 01:16:47,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:16:47,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 01:16:47,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-10-13 01:16:47,897 INFO L87 Difference]: Start difference. First operand 1379 states and 1827 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-13 01:16:49,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:16:49,466 INFO L93 Difference]: Finished difference Result 2266 states and 3058 transitions. [2021-10-13 01:16:49,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 01:16:49,467 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2021-10-13 01:16:49,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:16:49,483 INFO L225 Difference]: With dead ends: 2266 [2021-10-13 01:16:49,483 INFO L226 Difference]: Without dead ends: 2170 [2021-10-13 01:16:49,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 565.7ms TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-10-13 01:16:49,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-10-13 01:16:49,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1993. [2021-10-13 01:16:49,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1543 states have (on average 1.4121840570317563) internal successors, (2179), 1753 states have internal predecessors, (2179), 165 states have call successors, (165), 153 states have call predecessors, (165), 273 states have return successors, (421), 87 states have call predecessors, (421), 164 states have call successors, (421) [2021-10-13 01:16:49,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 2765 transitions. [2021-10-13 01:16:49,618 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 2765 transitions. Word has length 39 [2021-10-13 01:16:49,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:16:49,619 INFO L470 AbstractCegarLoop]: Abstraction has 1993 states and 2765 transitions. [2021-10-13 01:16:49,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-13 01:16:49,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 2765 transitions. [2021-10-13 01:16:49,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-13 01:16:49,623 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:16:49,623 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:16:49,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 01:16:49,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:16:49,840 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:16:49,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:16:49,841 INFO L82 PathProgramCache]: Analyzing trace with hash -268124004, now seen corresponding path program 1 times [2021-10-13 01:16:49,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:16:49,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943175564] [2021-10-13 01:16:49,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:16:49,842 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:16:49,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:16:49,844 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:16:49,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 01:16:50,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:50,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 01:16:50,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:16:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 01:16:50,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:16:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:51,152 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:16:51,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943175564] [2021-10-13 01:16:51,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943175564] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 01:16:51,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:16:51,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2021-10-13 01:16:51,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350683709] [2021-10-13 01:16:51,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 01:16:51,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:16:51,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 01:16:51,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-10-13 01:16:51,156 INFO L87 Difference]: Start difference. First operand 1993 states and 2765 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-13 01:16:52,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:16:52,903 INFO L93 Difference]: Finished difference Result 2261 states and 2971 transitions. [2021-10-13 01:16:52,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 01:16:52,904 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 39 [2021-10-13 01:16:52,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:16:52,920 INFO L225 Difference]: With dead ends: 2261 [2021-10-13 01:16:52,921 INFO L226 Difference]: Without dead ends: 2089 [2021-10-13 01:16:52,922 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 801.8ms TimeCoverageRelationStatistics Valid=308, Invalid=1098, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 01:16:52,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-10-13 01:16:52,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1917. [2021-10-13 01:16:53,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1469 states have (on average 1.3921034717494893) internal successors, (2045), 1677 states have internal predecessors, (2045), 165 states have call successors, (165), 153 states have call predecessors, (165), 271 states have return successors, (393), 87 states have call predecessors, (393), 164 states have call successors, (393) [2021-10-13 01:16:53,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2603 transitions. [2021-10-13 01:16:53,012 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2603 transitions. Word has length 39 [2021-10-13 01:16:53,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:16:53,013 INFO L470 AbstractCegarLoop]: Abstraction has 1917 states and 2603 transitions. [2021-10-13 01:16:53,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-13 01:16:53,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2603 transitions. [2021-10-13 01:16:53,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-13 01:16:53,014 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:16:53,015 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:16:53,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 01:16:53,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:16:53,231 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:16:53,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:16:53,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1040706548, now seen corresponding path program 1 times [2021-10-13 01:16:53,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:16:53,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426556786] [2021-10-13 01:16:53,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:16:53,232 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:16:53,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:16:53,233 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:16:53,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 01:16:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:53,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 01:16:53,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:16:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 01:16:54,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:16:56,303 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:56,304 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:16:56,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426556786] [2021-10-13 01:16:56,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1426556786] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 01:16:56,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:16:56,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 26 [2021-10-13 01:16:56,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177881316] [2021-10-13 01:16:56,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 01:16:56,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:16:56,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 01:16:56,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-10-13 01:16:56,307 INFO L87 Difference]: Start difference. First operand 1917 states and 2603 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-13 01:17:01,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:17:01,571 INFO L93 Difference]: Finished difference Result 3752 states and 4910 transitions. [2021-10-13 01:17:01,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-13 01:17:01,571 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 45 [2021-10-13 01:17:01,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:17:01,592 INFO L225 Difference]: With dead ends: 3752 [2021-10-13 01:17:01,592 INFO L226 Difference]: Without dead ends: 3716 [2021-10-13 01:17:01,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 3199.5ms TimeCoverageRelationStatistics Valid=977, Invalid=4279, Unknown=0, NotChecked=0, Total=5256 [2021-10-13 01:17:01,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3716 states. [2021-10-13 01:17:01,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3716 to 3017. [2021-10-13 01:17:01,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 2325 states have (on average 1.3372043010752688) internal successors, (3109), 2625 states have internal predecessors, (3109), 257 states have call successors, (257), 257 states have call predecessors, (257), 423 states have return successors, (665), 135 states have call predecessors, (665), 256 states have call successors, (665) [2021-10-13 01:17:01,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 4031 transitions. [2021-10-13 01:17:01,710 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 4031 transitions. Word has length 45 [2021-10-13 01:17:01,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:17:01,711 INFO L470 AbstractCegarLoop]: Abstraction has 3017 states and 4031 transitions. [2021-10-13 01:17:01,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-13 01:17:01,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 4031 transitions. [2021-10-13 01:17:01,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-13 01:17:01,712 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:17:01,713 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:17:01,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 01:17:01,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:17:01,928 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:17:01,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:17:01,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1515964261, now seen corresponding path program 1 times [2021-10-13 01:17:01,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:17:01,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119996785] [2021-10-13 01:17:01,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:17:01,929 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:17:01,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:17:01,930 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:17:01,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 01:17:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:17:02,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 01:17:02,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:17:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 01:17:02,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:17:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:17:03,268 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:17:03,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119996785] [2021-10-13 01:17:03,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119996785] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 01:17:03,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:17:03,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 19 [2021-10-13 01:17:03,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506443023] [2021-10-13 01:17:03,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 01:17:03,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:17:03,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 01:17:03,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-10-13 01:17:03,270 INFO L87 Difference]: Start difference. First operand 3017 states and 4031 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 13 states have internal predecessors, (51), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-13 01:17:05,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:17:05,094 INFO L93 Difference]: Finished difference Result 4090 states and 5262 transitions. [2021-10-13 01:17:05,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 01:17:05,095 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 13 states have internal predecessors, (51), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2021-10-13 01:17:05,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:17:05,120 INFO L225 Difference]: With dead ends: 4090 [2021-10-13 01:17:05,120 INFO L226 Difference]: Without dead ends: 3950 [2021-10-13 01:17:05,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 818.2ms TimeCoverageRelationStatistics Valid=398, Invalid=1494, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 01:17:05,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3950 states. [2021-10-13 01:17:05,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3950 to 3716. [2021-10-13 01:17:05,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 2853 states have (on average 1.3168594461969856) internal successors, (3757), 3219 states have internal predecessors, (3757), 326 states have call successors, (326), 326 states have call predecessors, (326), 525 states have return successors, (779), 171 states have call predecessors, (779), 325 states have call successors, (779) [2021-10-13 01:17:05,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 4862 transitions. [2021-10-13 01:17:05,271 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 4862 transitions. Word has length 48 [2021-10-13 01:17:05,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:17:05,272 INFO L470 AbstractCegarLoop]: Abstraction has 3716 states and 4862 transitions. [2021-10-13 01:17:05,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 13 states have internal predecessors, (51), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-13 01:17:05,272 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 4862 transitions. [2021-10-13 01:17:05,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-13 01:17:05,273 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:17:05,273 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:17:05,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 01:17:05,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:17:05,489 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:17:05,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:17:05,490 INFO L82 PathProgramCache]: Analyzing trace with hash 574627678, now seen corresponding path program 1 times [2021-10-13 01:17:05,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:17:05,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82766264] [2021-10-13 01:17:05,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:17:05,491 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:17:05,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:17:05,493 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:17:05,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 01:17:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:17:05,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 01:17:05,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:17:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-13 01:17:06,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:17:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:17:07,112 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:17:07,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82766264] [2021-10-13 01:17:07,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82766264] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 01:17:07,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:17:07,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 22 [2021-10-13 01:17:07,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558471150] [2021-10-13 01:17:07,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 01:17:07,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:17:07,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 01:17:07,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-10-13 01:17:07,116 INFO L87 Difference]: Start difference. First operand 3716 states and 4862 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 15 states have internal predecessors, (64), 6 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-10-13 01:17:09,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:17:09,813 INFO L93 Difference]: Finished difference Result 4249 states and 5467 transitions. [2021-10-13 01:17:09,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 01:17:09,814 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 15 states have internal predecessors, (64), 6 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 59 [2021-10-13 01:17:09,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:17:09,841 INFO L225 Difference]: With dead ends: 4249 [2021-10-13 01:17:09,841 INFO L226 Difference]: Without dead ends: 4177 [2021-10-13 01:17:09,843 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1187.5ms TimeCoverageRelationStatistics Valid=493, Invalid=1957, Unknown=0, NotChecked=0, Total=2450 [2021-10-13 01:17:09,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4177 states. [2021-10-13 01:17:09,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4177 to 4017. [2021-10-13 01:17:09,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4017 states, 3083 states have (on average 1.3139798897178074) internal successors, (4051), 3485 states have internal predecessors, (4051), 349 states have call successors, (349), 349 states have call predecessors, (349), 573 states have return successors, (833), 183 states have call predecessors, (833), 348 states have call successors, (833) [2021-10-13 01:17:09,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4017 states to 4017 states and 5233 transitions. [2021-10-13 01:17:09,989 INFO L78 Accepts]: Start accepts. Automaton has 4017 states and 5233 transitions. Word has length 59 [2021-10-13 01:17:09,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:17:09,989 INFO L470 AbstractCegarLoop]: Abstraction has 4017 states and 5233 transitions. [2021-10-13 01:17:09,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 15 states have internal predecessors, (64), 6 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-10-13 01:17:09,990 INFO L276 IsEmpty]: Start isEmpty. Operand 4017 states and 5233 transitions. [2021-10-13 01:17:09,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-13 01:17:09,991 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:17:09,992 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:17:10,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 01:17:10,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:17:10,208 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:17:10,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:17:10,209 INFO L82 PathProgramCache]: Analyzing trace with hash 517554629, now seen corresponding path program 2 times [2021-10-13 01:17:10,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:17:10,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361982745] [2021-10-13 01:17:10,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 01:17:10,210 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:17:10,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:17:10,211 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:17:10,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 01:17:10,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 01:17:10,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:17:10,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 01:17:10,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:17:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-13 01:17:11,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:17:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 20 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:17:14,149 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:17:14,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361982745] [2021-10-13 01:17:14,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361982745] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 01:17:14,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:17:14,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 32 [2021-10-13 01:17:14,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580313204] [2021-10-13 01:17:14,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 01:17:14,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:17:14,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 01:17:14,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-10-13 01:17:14,151 INFO L87 Difference]: Start difference. First operand 4017 states and 5233 transitions. Second operand has 32 states, 32 states have (on average 2.90625) internal successors, (93), 26 states have internal predecessors, (93), 12 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2021-10-13 01:17:21,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:17:21,454 INFO L93 Difference]: Finished difference Result 7214 states and 9448 transitions. [2021-10-13 01:17:21,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-10-13 01:17:21,457 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 26 states have internal predecessors, (93), 12 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) Word has length 70 [2021-10-13 01:17:21,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:17:21,504 INFO L225 Difference]: With dead ends: 7214 [2021-10-13 01:17:21,505 INFO L226 Difference]: Without dead ends: 7154 [2021-10-13 01:17:21,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 4609.4ms TimeCoverageRelationStatistics Valid=1482, Invalid=6890, Unknown=0, NotChecked=0, Total=8372 [2021-10-13 01:17:21,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7154 states. [2021-10-13 01:17:21,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7154 to 5071. [2021-10-13 01:17:21,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5071 states, 3907 states have (on average 1.3137957512157665) internal successors, (5133), 4429 states have internal predecessors, (5133), 421 states have call successors, (421), 421 states have call predecessors, (421), 731 states have return successors, (1057), 221 states have call predecessors, (1057), 420 states have call successors, (1057) [2021-10-13 01:17:21,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5071 states to 5071 states and 6611 transitions. [2021-10-13 01:17:21,705 INFO L78 Accepts]: Start accepts. Automaton has 5071 states and 6611 transitions. Word has length 70 [2021-10-13 01:17:21,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:17:21,707 INFO L470 AbstractCegarLoop]: Abstraction has 5071 states and 6611 transitions. [2021-10-13 01:17:21,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 26 states have internal predecessors, (93), 12 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2021-10-13 01:17:21,708 INFO L276 IsEmpty]: Start isEmpty. Operand 5071 states and 6611 transitions. [2021-10-13 01:17:21,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-13 01:17:21,709 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:17:21,710 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:17:21,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 01:17:21,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:17:21,925 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:17:21,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:17:21,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1608789574, now seen corresponding path program 1 times [2021-10-13 01:17:21,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:17:21,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963043297] [2021-10-13 01:17:21,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:17:21,926 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:17:21,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:17:21,927 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:17:21,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 01:17:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:17:22,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 01:17:22,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:17:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-13 01:17:22,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:17:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-13 01:17:23,214 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:17:23,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963043297] [2021-10-13 01:17:23,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963043297] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 01:17:23,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:17:23,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-10-13 01:17:23,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598898604] [2021-10-13 01:17:23,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 01:17:23,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:17:23,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 01:17:23,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-13 01:17:23,216 INFO L87 Difference]: Start difference. First operand 5071 states and 6611 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 3 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-10-13 01:17:23,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:17:23,829 INFO L93 Difference]: Finished difference Result 9835 states and 12944 transitions. [2021-10-13 01:17:23,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 01:17:23,831 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 3 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 71 [2021-10-13 01:17:23,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:17:23,877 INFO L225 Difference]: With dead ends: 9835 [2021-10-13 01:17:23,877 INFO L226 Difference]: Without dead ends: 9835 [2021-10-13 01:17:23,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-10-13 01:17:23,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9835 states. [2021-10-13 01:17:24,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9835 to 9811. [2021-10-13 01:17:24,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9811 states, 7495 states have (on average 1.313809206137425) internal successors, (9847), 8623 states have internal predecessors, (9847), 778 states have call successors, (778), 778 states have call predecessors, (778), 1526 states have return successors, (2299), 410 states have call predecessors, (2299), 777 states have call successors, (2299) [2021-10-13 01:17:24,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9811 states to 9811 states and 12924 transitions. [2021-10-13 01:17:24,180 INFO L78 Accepts]: Start accepts. Automaton has 9811 states and 12924 transitions. Word has length 71 [2021-10-13 01:17:24,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:17:24,180 INFO L470 AbstractCegarLoop]: Abstraction has 9811 states and 12924 transitions. [2021-10-13 01:17:24,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 3 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-10-13 01:17:24,181 INFO L276 IsEmpty]: Start isEmpty. Operand 9811 states and 12924 transitions. [2021-10-13 01:17:24,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-13 01:17:24,183 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:17:24,183 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 4, 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, 1] [2021-10-13 01:17:24,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-13 01:17:24,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:17:24,401 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:17:24,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:17:24,402 INFO L82 PathProgramCache]: Analyzing trace with hash -511357765, now seen corresponding path program 1 times [2021-10-13 01:17:24,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:17:24,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251034219] [2021-10-13 01:17:24,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:17:24,403 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:17:24,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:17:24,404 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:17:24,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 01:17:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:17:25,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 01:17:25,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:17:25,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 01:17:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 32 proven. 47 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-13 01:17:25,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:17:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 29 proven. 50 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-13 01:17:26,655 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:17:26,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251034219] [2021-10-13 01:17:26,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251034219] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 01:17:26,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:17:26,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-10-13 01:17:26,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123696870] [2021-10-13 01:17:26,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 01:17:26,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:17:26,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 01:17:26,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-10-13 01:17:26,658 INFO L87 Difference]: Start difference. First operand 9811 states and 12924 transitions. Second operand has 15 states, 14 states have (on average 4.571428571428571) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (10), 8 states have call predecessors, (10), 10 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-10-13 01:17:28,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:17:28,959 INFO L93 Difference]: Finished difference Result 16626 states and 22220 transitions. [2021-10-13 01:17:28,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 01:17:28,960 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.571428571428571) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (10), 8 states have call predecessors, (10), 10 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 79 [2021-10-13 01:17:28,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:17:29,027 INFO L225 Difference]: With dead ends: 16626 [2021-10-13 01:17:29,027 INFO L226 Difference]: Without dead ends: 16626 [2021-10-13 01:17:29,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 144 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 940.9ms TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 01:17:29,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16626 states. [2021-10-13 01:17:29,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16626 to 14338. [2021-10-13 01:17:29,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14338 states, 11019 states have (on average 1.329793992195299) internal successors, (14653), 12646 states have internal predecessors, (14653), 1114 states have call successors, (1114), 1114 states have call predecessors, (1114), 2194 states have return successors, (3523), 578 states have call predecessors, (3523), 1113 states have call successors, (3523) [2021-10-13 01:17:29,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14338 states to 14338 states and 19290 transitions. [2021-10-13 01:17:29,522 INFO L78 Accepts]: Start accepts. Automaton has 14338 states and 19290 transitions. Word has length 79 [2021-10-13 01:17:29,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:17:29,522 INFO L470 AbstractCegarLoop]: Abstraction has 14338 states and 19290 transitions. [2021-10-13 01:17:29,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.571428571428571) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (10), 8 states have call predecessors, (10), 10 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-10-13 01:17:29,523 INFO L276 IsEmpty]: Start isEmpty. Operand 14338 states and 19290 transitions. [2021-10-13 01:17:29,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-13 01:17:29,531 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:17:29,532 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 4, 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, 1] [2021-10-13 01:17:29,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-13 01:17:29,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:17:29,748 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:17:29,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:17:29,749 INFO L82 PathProgramCache]: Analyzing trace with hash -511357764, now seen corresponding path program 1 times [2021-10-13 01:17:29,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:17:29,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162374372] [2021-10-13 01:17:29,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:17:29,750 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:17:29,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:17:29,751 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:17:29,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-13 01:17:30,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:17:30,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-13 01:17:30,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:17:30,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 01:17:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 32 proven. 47 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-13 01:17:31,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:17:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 29 proven. 50 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-13 01:17:34,905 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:17:34,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162374372] [2021-10-13 01:17:34,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162374372] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 01:17:34,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:17:34,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-13 01:17:34,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023937123] [2021-10-13 01:17:34,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 01:17:34,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:17:34,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 01:17:34,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-10-13 01:17:34,912 INFO L87 Difference]: Start difference. First operand 14338 states and 19290 transitions. Second operand has 18 states, 17 states have (on average 4.647058823529412) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-13 01:17:41,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:17:41,383 INFO L93 Difference]: Finished difference Result 22975 states and 31271 transitions. [2021-10-13 01:17:41,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 01:17:41,386 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.647058823529412) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 79 [2021-10-13 01:17:41,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:17:41,467 INFO L225 Difference]: With dead ends: 22975 [2021-10-13 01:17:41,468 INFO L226 Difference]: Without dead ends: 22975 [2021-10-13 01:17:41,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 3704.0ms TimeCoverageRelationStatistics Valid=481, Invalid=1411, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 01:17:41,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22975 states. [2021-10-13 01:17:42,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22975 to 19568. [2021-10-13 01:17:42,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19568 states, 15241 states have (on average 1.3503707105832952) internal successors, (20581), 17376 states have internal predecessors, (20581), 1446 states have call successors, (1446), 1446 states have call predecessors, (1446), 2870 states have return successors, (4913), 746 states have call predecessors, (4913), 1445 states have call successors, (4913) [2021-10-13 01:17:42,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19568 states to 19568 states and 26940 transitions. [2021-10-13 01:17:42,137 INFO L78 Accepts]: Start accepts. Automaton has 19568 states and 26940 transitions. Word has length 79 [2021-10-13 01:17:42,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:17:42,138 INFO L470 AbstractCegarLoop]: Abstraction has 19568 states and 26940 transitions. [2021-10-13 01:17:42,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.647058823529412) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-13 01:17:42,139 INFO L276 IsEmpty]: Start isEmpty. Operand 19568 states and 26940 transitions. [2021-10-13 01:17:42,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-13 01:17:42,143 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:17:42,144 INFO L512 BasicCegarLoop]: trace histogram [9, 6, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 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] [2021-10-13 01:17:42,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-13 01:17:42,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:17:42,357 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:17:42,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:17:42,357 INFO L82 PathProgramCache]: Analyzing trace with hash 175036294, now seen corresponding path program 1 times [2021-10-13 01:17:42,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:17:42,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474568976] [2021-10-13 01:17:42,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:17:42,358 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:17:42,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:17:42,360 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:17:42,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-13 01:17:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:17:43,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 01:17:43,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:17:43,801 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 59 proven. 36 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-10-13 01:17:43,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:17:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 29 proven. 42 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-10-13 01:17:44,399 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:17:44,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474568976] [2021-10-13 01:17:44,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474568976] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 01:17:44,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:17:44,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2021-10-13 01:17:44,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312569279] [2021-10-13 01:17:44,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 01:17:44,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:17:44,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 01:17:44,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-10-13 01:17:44,401 INFO L87 Difference]: Start difference. First operand 19568 states and 26940 transitions. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 12 states have internal predecessors, (81), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-10-13 01:17:45,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:17:45,835 INFO L93 Difference]: Finished difference Result 26145 states and 35199 transitions. [2021-10-13 01:17:45,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 01:17:45,838 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 12 states have internal predecessors, (81), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 98 [2021-10-13 01:17:45,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:17:46,001 INFO L225 Difference]: With dead ends: 26145 [2021-10-13 01:17:46,001 INFO L226 Difference]: Without dead ends: 24927 [2021-10-13 01:17:46,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 740.9ms TimeCoverageRelationStatistics Valid=317, Invalid=1165, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 01:17:46,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24927 states. [2021-10-13 01:17:46,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24927 to 23061. [2021-10-13 01:17:46,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23061 states, 17872 states have (on average 1.3545210384959714) internal successors, (24208), 20491 states have internal predecessors, (24208), 1698 states have call successors, (1698), 1698 states have call predecessors, (1698), 3480 states have return successors, (5737), 872 states have call predecessors, (5737), 1697 states have call successors, (5737) [2021-10-13 01:17:46,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23061 states to 23061 states and 31643 transitions. [2021-10-13 01:17:46,855 INFO L78 Accepts]: Start accepts. Automaton has 23061 states and 31643 transitions. Word has length 98 [2021-10-13 01:17:46,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:17:46,856 INFO L470 AbstractCegarLoop]: Abstraction has 23061 states and 31643 transitions. [2021-10-13 01:17:46,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 12 states have internal predecessors, (81), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-10-13 01:17:46,856 INFO L276 IsEmpty]: Start isEmpty. Operand 23061 states and 31643 transitions. [2021-10-13 01:17:46,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-10-13 01:17:46,863 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:17:46,864 INFO L512 BasicCegarLoop]: trace histogram [10, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:17:46,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-13 01:17:47,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:17:47,079 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:17:47,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:17:47,080 INFO L82 PathProgramCache]: Analyzing trace with hash -159277390, now seen corresponding path program 2 times [2021-10-13 01:17:47,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:17:47,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923486851] [2021-10-13 01:17:47,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 01:17:47,081 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:17:47,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:17:47,083 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:17:47,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-13 01:17:48,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 01:17:48,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:17:48,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 01:17:48,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:17:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 92 proven. 37 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-13 01:17:48,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:17:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 48 proven. 57 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-10-13 01:17:49,808 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:17:49,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923486851] [2021-10-13 01:17:49,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923486851] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 01:17:49,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:17:49,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-10-13 01:17:49,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174307329] [2021-10-13 01:17:49,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 01:17:49,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:17:49,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 01:17:49,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-10-13 01:17:49,810 INFO L87 Difference]: Start difference. First operand 23061 states and 31643 transitions. Second operand has 20 states, 20 states have (on average 5.15) internal successors, (103), 16 states have internal predecessors, (103), 8 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) [2021-10-13 01:17:52,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:17:52,639 INFO L93 Difference]: Finished difference Result 65936 states and 93992 transitions. [2021-10-13 01:17:52,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-13 01:17:52,640 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 16 states have internal predecessors, (103), 8 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) Word has length 107 [2021-10-13 01:17:52,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:17:53,017 INFO L225 Difference]: With dead ends: 65936 [2021-10-13 01:17:53,018 INFO L226 Difference]: Without dead ends: 64256 [2021-10-13 01:17:53,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1640.8ms TimeCoverageRelationStatistics Valid=605, Invalid=2475, Unknown=0, NotChecked=0, Total=3080 [2021-10-13 01:17:53,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64256 states. [2021-10-13 01:17:54,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64256 to 61721. [2021-10-13 01:17:55,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61721 states, 48744 states have (on average 1.338667323157722) internal successors, (65252), 54131 states have internal predecessors, (65252), 5038 states have call successors, (5038), 5038 states have call predecessors, (5038), 7928 states have return successors, (18397), 2552 states have call predecessors, (18397), 5037 states have call successors, (18397) [2021-10-13 01:17:55,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61721 states to 61721 states and 88687 transitions. [2021-10-13 01:17:55,287 INFO L78 Accepts]: Start accepts. Automaton has 61721 states and 88687 transitions. Word has length 107 [2021-10-13 01:17:55,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:17:55,287 INFO L470 AbstractCegarLoop]: Abstraction has 61721 states and 88687 transitions. [2021-10-13 01:17:55,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 16 states have internal predecessors, (103), 8 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) [2021-10-13 01:17:55,288 INFO L276 IsEmpty]: Start isEmpty. Operand 61721 states and 88687 transitions. [2021-10-13 01:17:55,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-10-13 01:17:55,293 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:17:55,294 INFO L512 BasicCegarLoop]: trace histogram [10, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:17:55,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-13 01:17:55,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:17:55,509 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 01:17:55,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:17:55,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1851960145, now seen corresponding path program 1 times [2021-10-13 01:17:55,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:17:55,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1016183323] [2021-10-13 01:17:55,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:17:55,510 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:17:55,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:17:55,512 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:17:55,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-13 01:17:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:17:56,827 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 01:17:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:17:57,322 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-13 01:17:57,323 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 01:17:57,324 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-10-13 01:17:57,326 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr0REQUIRES_VIOLATION [2021-10-13 01:17:57,327 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr1REQUIRES_VIOLATION [2021-10-13 01:17:57,327 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr2REQUIRES_VIOLATION [2021-10-13 01:17:57,327 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr3REQUIRES_VIOLATION [2021-10-13 01:17:57,327 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr4REQUIRES_VIOLATION [2021-10-13 01:17:57,327 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr5REQUIRES_VIOLATION [2021-10-13 01:17:57,328 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr6REQUIRES_VIOLATION [2021-10-13 01:17:57,328 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr7REQUIRES_VIOLATION [2021-10-13 01:17:57,328 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr0REQUIRES_VIOLATION [2021-10-13 01:17:57,328 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr1REQUIRES_VIOLATION [2021-10-13 01:17:57,329 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr2REQUIRES_VIOLATION [2021-10-13 01:17:57,329 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr3REQUIRES_VIOLATION [2021-10-13 01:17:57,329 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr4REQUIRES_VIOLATION [2021-10-13 01:17:57,329 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr5REQUIRES_VIOLATION [2021-10-13 01:17:57,330 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-13 01:17:57,330 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-13 01:17:57,330 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:17:57,330 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:17:57,331 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:17:57,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-13 01:17:57,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:17:57,558 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 01:17:57,666 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-13 01:17:57,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 01:17:57 BoogieIcfgContainer [2021-10-13 01:17:57,768 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 01:17:57,770 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 01:17:57,770 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 01:17:57,771 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 01:17:57,771 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:16:31" (3/4) ... [2021-10-13 01:17:57,776 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 01:17:57,776 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 01:17:57,778 INFO L168 Benchmark]: Toolchain (without parser) took 88654.31 ms. Allocated memory was 88.1 MB in the beginning and 1.4 GB in the end (delta: 1.3 GB). Free memory was 51.8 MB in the beginning and 785.6 MB in the end (delta: -733.8 MB). Peak memory consumption was 591.4 MB. Max. memory is 16.1 GB. [2021-10-13 01:17:57,778 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 88.1 MB. Free memory is still 69.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:17:57,779 INFO L168 Benchmark]: CACSL2BoogieTranslator took 655.99 ms. Allocated memory is still 88.1 MB. Free memory was 51.6 MB in the beginning and 64.6 MB in the end (delta: -12.9 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2021-10-13 01:17:57,780 INFO L168 Benchmark]: Boogie Preprocessor took 110.61 ms. Allocated memory is still 88.1 MB. Free memory was 64.6 MB in the beginning and 61.3 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 01:17:57,780 INFO L168 Benchmark]: RCFGBuilder took 1171.32 ms. Allocated memory is still 88.1 MB. Free memory was 61.1 MB in the beginning and 66.2 MB in the end (delta: -5.1 MB). Peak memory consumption was 28.5 MB. Max. memory is 16.1 GB. [2021-10-13 01:17:57,781 INFO L168 Benchmark]: TraceAbstraction took 86701.59 ms. Allocated memory was 88.1 MB in the beginning and 1.4 GB in the end (delta: 1.3 GB). Free memory was 65.9 MB in the beginning and 785.6 MB in the end (delta: -719.7 MB). Peak memory consumption was 604.0 MB. Max. memory is 16.1 GB. [2021-10-13 01:17:57,781 INFO L168 Benchmark]: Witness Printer took 5.92 ms. Allocated memory is still 1.4 GB. Free memory is still 785.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:17:57,783 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 69.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 655.99 ms. Allocated memory is still 88.1 MB. Free memory was 51.6 MB in the beginning and 64.6 MB in the end (delta: -12.9 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 110.61 ms. Allocated memory is still 88.1 MB. Free memory was 64.6 MB in the beginning and 61.3 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1171.32 ms. Allocated memory is still 88.1 MB. Free memory was 61.1 MB in the beginning and 66.2 MB in the end (delta: -5.1 MB). Peak memory consumption was 28.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 86701.59 ms. Allocated memory was 88.1 MB in the beginning and 1.4 GB in the end (delta: 1.3 GB). Free memory was 65.9 MB in the beginning and 785.6 MB in the end (delta: -719.7 MB). Peak memory consumption was 604.0 MB. Max. memory is 16.1 GB. * Witness Printer took 5.92 ms. Allocated memory is still 1.4 GB. Free memory is still 785.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=18, \old(pc4)=28, \old(res4)=22, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L542] x1->data = 4 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=3, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L545] t1 = S VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=3, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=4, pc1++=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L548] x1->next = t1 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L551] COND TRUE S == t1 [L552] S = x1 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L569] t4 = S VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=2, pc4++=1, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L598] RET pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=2, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=2, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=2, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L571] case 2: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=2, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=3, pc4++=2, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L572] COND FALSE !(t4 == ((void *)0)) VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=2, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=3, pc4++=2, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L598] RET pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=3, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=3, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=3, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L571] case 2: [L575] case 3: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=3, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=4, pc4++=3, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L576] EXPR t4->next VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=3, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=4, pc4++=3, res4=0, S={1:0}, t1={0:0}, t4={1:0}, t4->next={0:0}, x1={1:0}, x4={0:0}] [L576] x4 = t4->next [L598] RET pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=4, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=4, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=4, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L571] case 2: [L575] case 3: [L578] case 4: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=4, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=5, pc4++=4, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L579] COND TRUE S == t4 [L580] S = x4 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=4, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=5, pc4++=4, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L598] RET pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=6, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: [L556] case 6: [L557] pc1 = 1 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=6, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc1++=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L594] COND FALSE !(S || 1 != pc1 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, \result=0, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 96 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 86421.2ms, OverallIterations: 24, TraceHistogramMax: 10, EmptinessCheckTime: 74.2ms, AutomataDifference: 40500.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3107 SDtfs, 16252 SDslu, 5564 SDs, 0 SdLazy, 14139 SolverSat, 3928 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19682.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2263 GetRequests, 1651 SyntacticMatches, 10 SemanticMatches, 602 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6128 ImplicationChecksByTransitivity, 20078.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=61721occurred in iteration=23, InterpolantAutomatonStates: 468, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 5935.8ms AutomataMinimizationTime, 23 MinimizatonAttempts, 14350 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 579.6ms SsaConstructionTime, 2990.0ms SatisfiabilityAnalysisTime, 22459.0ms InterpolantComputationTime, 1039 NumberOfCodeBlocks, 1039 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1814 ConstructedInterpolants, 20 QuantifiedInterpolants, 11966 SizeOfPredicates, 83 NumberOfNonLiveVariables, 6593 ConjunctsInSsa, 325 ConjunctsInUnsatCore, 46 InterpolantComputations, 14 PerfectInterpolantSequences, 1431/2450 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-13 01:17:57,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf3a80f-62b3-40b3-aa79-ec8632ab98b9/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...