./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0232-3.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_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/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_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0232-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/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_21e33352-889c-4f37-bca6-2fb46fad3435/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 79c869b9530d3ec4745fdd0d6c1ca37b23d5c5fc .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 01:25:12,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 01:25:12,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 01:25:12,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 01:25:12,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 01:25:12,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 01:25:12,897 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 01:25:12,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 01:25:12,905 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 01:25:12,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 01:25:12,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 01:25:12,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 01:25:12,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 01:25:12,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 01:25:12,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 01:25:12,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 01:25:12,932 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 01:25:12,934 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 01:25:12,937 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 01:25:12,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 01:25:12,948 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 01:25:12,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 01:25:12,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 01:25:12,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 01:25:12,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 01:25:12,962 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 01:25:12,962 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 01:25:12,965 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 01:25:12,966 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 01:25:12,967 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 01:25:12,968 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 01:25:12,969 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 01:25:12,971 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 01:25:12,973 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 01:25:12,975 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 01:25:12,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 01:25:12,976 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 01:25:12,977 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 01:25:12,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 01:25:12,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 01:25:12,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 01:25:12,980 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-13 01:25:13,037 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 01:25:13,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 01:25:13,038 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 01:25:13,039 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 01:25:13,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 01:25:13,041 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 01:25:13,041 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 01:25:13,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 01:25:13,042 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 01:25:13,042 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 01:25:13,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 01:25:13,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 01:25:13,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 01:25:13,045 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 01:25:13,045 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 01:25:13,045 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 01:25:13,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 01:25:13,046 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 01:25:13,046 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 01:25:13,047 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 01:25:13,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 01:25:13,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 01:25:13,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 01:25:13,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:25:13,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 01:25:13,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 01:25:13,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 01:25:13,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 01:25:13,059 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 01:25:13,061 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_21e33352-889c-4f37-bca6-2fb46fad3435/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79c869b9530d3ec4745fdd0d6c1ca37b23d5c5fc [2021-10-13 01:25:13,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 01:25:13,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 01:25:13,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 01:25:13,496 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 01:25:13,497 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 01:25:13,498 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/memsafety/test-0232-3.i [2021-10-13 01:25:13,570 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/data/25b15ef3d/6a9caa81d67f4534a022108af7aa85ad/FLAGf591d6871 [2021-10-13 01:25:14,236 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 01:25:14,237 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/sv-benchmarks/c/memsafety/test-0232-3.i [2021-10-13 01:25:14,259 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/data/25b15ef3d/6a9caa81d67f4534a022108af7aa85ad/FLAGf591d6871 [2021-10-13 01:25:14,467 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/data/25b15ef3d/6a9caa81d67f4534a022108af7aa85ad [2021-10-13 01:25:14,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 01:25:14,474 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 01:25:14,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 01:25:14,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 01:25:14,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 01:25:14,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:25:14" (1/1) ... [2021-10-13 01:25:14,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14cfd392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:25:14, skipping insertion in model container [2021-10-13 01:25:14,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:25:14" (1/1) ... [2021-10-13 01:25:14,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 01:25:14,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 01:25:14,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:25:14,985 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 01:25:15,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:25:15,109 INFO L208 MainTranslator]: Completed translation [2021-10-13 01:25:15,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:25:15 WrapperNode [2021-10-13 01:25:15,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 01:25:15,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 01:25:15,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 01:25:15,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 01:25:15,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:25:15" (1/1) ... [2021-10-13 01:25:15,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:25:15" (1/1) ... [2021-10-13 01:25:15,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:25:15" (1/1) ... [2021-10-13 01:25:15,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:25:15" (1/1) ... [2021-10-13 01:25:15,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:25:15" (1/1) ... [2021-10-13 01:25:15,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:25:15" (1/1) ... [2021-10-13 01:25:15,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:25:15" (1/1) ... [2021-10-13 01:25:15,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 01:25:15,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 01:25:15,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 01:25:15,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 01:25:15,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:25:15" (1/1) ... [2021-10-13 01:25:15,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:25:15,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:25:15,250 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 01:25:15,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 01:25:15,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-13 01:25:15,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 01:25:15,310 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-13 01:25:15,310 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-13 01:25:15,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-13 01:25:15,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-13 01:25:15,312 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-13 01:25:15,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-13 01:25:15,313 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-10-13 01:25:15,313 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-13 01:25:15,313 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-13 01:25:15,314 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-13 01:25:15,315 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-13 01:25:15,315 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-13 01:25:15,315 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-13 01:25:15,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 01:25:15,315 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-13 01:25:15,316 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-13 01:25:15,316 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-13 01:25:15,316 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-13 01:25:15,316 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-13 01:25:15,316 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-13 01:25:15,317 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-13 01:25:15,317 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-13 01:25:15,317 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-13 01:25:15,317 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-13 01:25:15,317 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-13 01:25:15,318 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-13 01:25:15,318 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-13 01:25:15,318 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-13 01:25:15,318 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-13 01:25:15,318 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-13 01:25:15,319 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-13 01:25:15,319 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-13 01:25:15,319 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-13 01:25:15,319 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-13 01:25:15,320 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-13 01:25:15,320 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-13 01:25:15,320 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-13 01:25:15,320 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-13 01:25:15,320 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-13 01:25:15,321 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-13 01:25:15,321 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-13 01:25:15,321 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-13 01:25:15,321 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-13 01:25:15,321 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-13 01:25:15,322 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-13 01:25:15,322 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-13 01:25:15,322 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-13 01:25:15,323 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-13 01:25:15,323 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-13 01:25:15,324 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-13 01:25:15,324 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-13 01:25:15,325 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-13 01:25:15,325 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-13 01:25:15,325 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-13 01:25:15,326 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-13 01:25:15,326 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-13 01:25:15,326 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-13 01:25:15,326 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-13 01:25:15,327 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-13 01:25:15,327 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-13 01:25:15,327 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-13 01:25:15,327 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-13 01:25:15,327 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-13 01:25:15,328 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-13 01:25:15,328 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-13 01:25:15,328 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-13 01:25:15,330 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-13 01:25:15,330 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-13 01:25:15,331 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-13 01:25:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-13 01:25:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-13 01:25:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-13 01:25:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-13 01:25:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-13 01:25:15,333 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-13 01:25:15,333 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-13 01:25:15,333 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-13 01:25:15,333 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-13 01:25:15,333 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-13 01:25:15,335 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-13 01:25:15,335 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-13 01:25:15,335 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-13 01:25:15,335 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-13 01:25:15,335 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-13 01:25:15,336 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-13 01:25:15,336 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-13 01:25:15,336 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-13 01:25:15,336 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-13 01:25:15,337 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-13 01:25:15,337 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-13 01:25:15,337 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-13 01:25:15,337 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-13 01:25:15,337 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-13 01:25:15,338 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-13 01:25:15,338 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-13 01:25:15,338 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-13 01:25:15,338 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-13 01:25:15,338 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-13 01:25:15,339 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-13 01:25:15,339 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-13 01:25:15,339 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-13 01:25:15,339 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-13 01:25:15,339 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-13 01:25:15,340 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-13 01:25:15,340 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-13 01:25:15,340 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-13 01:25:15,341 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-13 01:25:15,341 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-13 01:25:15,341 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-13 01:25:15,341 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-13 01:25:15,342 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-13 01:25:15,343 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-13 01:25:15,343 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-13 01:25:15,343 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-13 01:25:15,343 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-13 01:25:15,343 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-13 01:25:15,344 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-13 01:25:15,344 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-13 01:25:15,344 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-13 01:25:15,344 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-13 01:25:15,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-13 01:25:15,345 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-10-13 01:25:15,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 01:25:15,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 01:25:15,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 01:25:15,346 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-13 01:25:15,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-13 01:25:15,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 01:25:15,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-13 01:25:15,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 01:25:15,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 01:25:15,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 01:25:15,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 01:25:16,262 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 01:25:16,264 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-13 01:25:16,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:25:16 BoogieIcfgContainer [2021-10-13 01:25:16,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 01:25:16,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 01:25:16,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 01:25:16,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 01:25:16,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:25:14" (1/3) ... [2021-10-13 01:25:16,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c7bee01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:25:16, skipping insertion in model container [2021-10-13 01:25:16,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:25:15" (2/3) ... [2021-10-13 01:25:16,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c7bee01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:25:16, skipping insertion in model container [2021-10-13 01:25:16,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:25:16" (3/3) ... [2021-10-13 01:25:16,286 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0232-3.i [2021-10-13 01:25:16,321 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 01:25:16,322 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2021-10-13 01:25:16,390 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 01:25:16,401 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 01:25:16,401 INFO L340 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2021-10-13 01:25:16,429 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 53 states have (on average 2.150943396226415) internal successors, (114), 107 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:25:16,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 01:25:16,437 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:16,438 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:16,438 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:16,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:16,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1500158253, now seen corresponding path program 1 times [2021-10-13 01:25:16,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:16,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416242720] [2021-10-13 01:25:16,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:16,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:16,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:16,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:16,770 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 01:25:16,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:16,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416242720] [2021-10-13 01:25:16,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416242720] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:25:16,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:25:16,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 01:25:16,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87021738] [2021-10-13 01:25:16,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 01:25:16,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:16,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 01:25:16,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 01:25:16,807 INFO L87 Difference]: Start difference. First operand has 114 states, 53 states have (on average 2.150943396226415) internal successors, (114), 107 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 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 01:25:17,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:17,162 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2021-10-13 01:25:17,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 01:25:17,164 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 01:25:17,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:17,178 INFO L225 Difference]: With dead ends: 114 [2021-10-13 01:25:17,179 INFO L226 Difference]: Without dead ends: 111 [2021-10-13 01:25:17,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 01:25:17,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-13 01:25:17,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-10-13 01:25:17,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 51 states have (on average 2.156862745098039) internal successors, (110), 105 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:25:17,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2021-10-13 01:25:17,231 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 8 [2021-10-13 01:25:17,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:17,232 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2021-10-13 01:25:17,232 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 01:25:17,232 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2021-10-13 01:25:17,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 01:25:17,233 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:17,233 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:17,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 01:25:17,233 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting appendErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:17,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:17,234 INFO L82 PathProgramCache]: Analyzing trace with hash -739601476, now seen corresponding path program 1 times [2021-10-13 01:25:17,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:17,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307354839] [2021-10-13 01:25:17,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:17,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:17,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:17,363 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 01:25:17,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:17,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307354839] [2021-10-13 01:25:17,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307354839] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:25:17,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:25:17,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 01:25:17,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723666584] [2021-10-13 01:25:17,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 01:25:17,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:17,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 01:25:17,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:25:17,368 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:25:17,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:17,843 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2021-10-13 01:25:17,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 01:25:17,844 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-10-13 01:25:17,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:17,845 INFO L225 Difference]: With dead ends: 105 [2021-10-13 01:25:17,845 INFO L226 Difference]: Without dead ends: 105 [2021-10-13 01:25:17,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:25:17,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-13 01:25:17,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-10-13 01:25:17,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 52 states have (on average 2.0) internal successors, (104), 98 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:25:17,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2021-10-13 01:25:17,862 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 9 [2021-10-13 01:25:17,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:17,868 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2021-10-13 01:25:17,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:25:17,869 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2021-10-13 01:25:17,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 01:25:17,869 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:17,869 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:17,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 01:25:17,870 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:17,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:17,871 INFO L82 PathProgramCache]: Analyzing trace with hash -739601475, now seen corresponding path program 1 times [2021-10-13 01:25:17,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:17,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378803389] [2021-10-13 01:25:17,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:17,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:17,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:18,010 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 01:25:18,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:18,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378803389] [2021-10-13 01:25:18,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378803389] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:25:18,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:25:18,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 01:25:18,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069438397] [2021-10-13 01:25:18,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 01:25:18,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:18,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 01:25:18,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:25:18,014 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:25:18,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:18,457 INFO L93 Difference]: Finished difference Result 133 states and 140 transitions. [2021-10-13 01:25:18,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 01:25:18,460 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-10-13 01:25:18,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:18,463 INFO L225 Difference]: With dead ends: 133 [2021-10-13 01:25:18,463 INFO L226 Difference]: Without dead ends: 133 [2021-10-13 01:25:18,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:25:18,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-13 01:25:18,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-10-13 01:25:18,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 63 states have (on average 1.8571428571428572) internal successors, (117), 105 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:25:18,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2021-10-13 01:25:18,480 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 9 [2021-10-13 01:25:18,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:18,480 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2021-10-13 01:25:18,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:25:18,481 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2021-10-13 01:25:18,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 01:25:18,483 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:18,483 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:18,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 01:25:18,484 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:18,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:18,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1452809171, now seen corresponding path program 1 times [2021-10-13 01:25:18,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:18,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109285883] [2021-10-13 01:25:18,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:18,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:18,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:18,590 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 01:25:18,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:18,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109285883] [2021-10-13 01:25:18,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109285883] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:25:18,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:25:18,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 01:25:18,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974602417] [2021-10-13 01:25:18,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:25:18,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:18,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:25:18,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:25:18,593 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:25:18,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:18,772 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2021-10-13 01:25:18,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 01:25:18,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-13 01:25:18,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:18,774 INFO L225 Difference]: With dead ends: 107 [2021-10-13 01:25:18,774 INFO L226 Difference]: Without dead ends: 107 [2021-10-13 01:25:18,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:25:18,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-13 01:25:18,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-10-13 01:25:18,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 63 states have (on average 1.7777777777777777) internal successors, (112), 101 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:25:18,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2021-10-13 01:25:18,784 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 10 [2021-10-13 01:25:18,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:18,785 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2021-10-13 01:25:18,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:25:18,785 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2021-10-13 01:25:18,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 01:25:18,786 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:18,786 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:18,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 01:25:18,786 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:18,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:18,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1452809170, now seen corresponding path program 1 times [2021-10-13 01:25:18,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:18,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680746395] [2021-10-13 01:25:18,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:18,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:18,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:18,857 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 01:25:18,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:18,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680746395] [2021-10-13 01:25:18,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680746395] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:25:18,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:25:18,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 01:25:18,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207846637] [2021-10-13 01:25:18,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:25:18,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:18,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:25:18,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:25:18,861 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:25:19,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:19,032 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2021-10-13 01:25:19,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 01:25:19,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-13 01:25:19,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:19,034 INFO L225 Difference]: With dead ends: 103 [2021-10-13 01:25:19,034 INFO L226 Difference]: Without dead ends: 103 [2021-10-13 01:25:19,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:25:19,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-13 01:25:19,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-10-13 01:25:19,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.6984126984126984) internal successors, (107), 97 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:25:19,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2021-10-13 01:25:19,043 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 10 [2021-10-13 01:25:19,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:19,044 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2021-10-13 01:25:19,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:25:19,044 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2021-10-13 01:25:19,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 01:25:19,045 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:19,045 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:19,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 01:25:19,045 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:19,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:19,046 INFO L82 PathProgramCache]: Analyzing trace with hash -2099912409, now seen corresponding path program 1 times [2021-10-13 01:25:19,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:19,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12845288] [2021-10-13 01:25:19,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:19,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:19,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:19,263 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 01:25:19,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:19,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12845288] [2021-10-13 01:25:19,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12845288] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:25:19,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:25:19,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-13 01:25:19,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872560737] [2021-10-13 01:25:19,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 01:25:19,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:19,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 01:25:19,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:25:19,267 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:25:19,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:19,678 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2021-10-13 01:25:19,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 01:25:19,683 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-13 01:25:19,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:19,684 INFO L225 Difference]: With dead ends: 114 [2021-10-13 01:25:19,684 INFO L226 Difference]: Without dead ends: 114 [2021-10-13 01:25:19,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 230.9ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-10-13 01:25:19,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-13 01:25:19,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2021-10-13 01:25:19,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 69 states have (on average 1.6376811594202898) internal successors, (113), 103 states have internal predecessors, (113), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:25:19,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2021-10-13 01:25:19,695 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 15 [2021-10-13 01:25:19,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:19,696 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2021-10-13 01:25:19,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:25:19,696 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2021-10-13 01:25:19,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 01:25:19,697 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:19,697 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:19,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 01:25:19,697 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:19,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:19,698 INFO L82 PathProgramCache]: Analyzing trace with hash -672497070, now seen corresponding path program 1 times [2021-10-13 01:25:19,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:19,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114238987] [2021-10-13 01:25:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:19,699 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:19,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:19,877 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 01:25:19,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:19,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114238987] [2021-10-13 01:25:19,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114238987] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:25:19,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:25:19,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 01:25:19,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622160877] [2021-10-13 01:25:19,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 01:25:19,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:19,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 01:25:19,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:25:19,881 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:25:20,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:20,144 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2021-10-13 01:25:20,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 01:25:20,145 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-13 01:25:20,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:20,146 INFO L225 Difference]: With dead ends: 109 [2021-10-13 01:25:20,146 INFO L226 Difference]: Without dead ends: 109 [2021-10-13 01:25:20,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:25:20,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-13 01:25:20,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2021-10-13 01:25:20,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 66 states have (on average 1.6515151515151516) internal successors, (109), 99 states have internal predecessors, (109), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:25:20,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2021-10-13 01:25:20,155 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 16 [2021-10-13 01:25:20,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:20,156 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2021-10-13 01:25:20,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:25:20,156 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2021-10-13 01:25:20,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 01:25:20,157 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:20,158 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:20,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 01:25:20,158 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:20,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:20,159 INFO L82 PathProgramCache]: Analyzing trace with hash 685617470, now seen corresponding path program 1 times [2021-10-13 01:25:20,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:20,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951052476] [2021-10-13 01:25:20,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:20,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:20,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:20,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:25:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:20,350 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 01:25:20,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:20,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951052476] [2021-10-13 01:25:20,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951052476] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:25:20,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:25:20,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-13 01:25:20,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251532016] [2021-10-13 01:25:20,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 01:25:20,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:20,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 01:25:20,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:25:20,354 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:25:20,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:20,762 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2021-10-13 01:25:20,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 01:25:20,763 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-10-13 01:25:20,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:20,765 INFO L225 Difference]: With dead ends: 123 [2021-10-13 01:25:20,765 INFO L226 Difference]: Without dead ends: 123 [2021-10-13 01:25:20,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-10-13 01:25:20,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-13 01:25:20,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 105. [2021-10-13 01:25:20,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 66 states have (on average 1.6363636363636365) internal successors, (108), 98 states have internal predecessors, (108), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:25:20,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2021-10-13 01:25:20,772 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 24 [2021-10-13 01:25:20,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:20,773 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2021-10-13 01:25:20,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:25:20,774 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2021-10-13 01:25:20,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 01:25:20,775 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:20,775 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:20,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 01:25:20,776 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:20,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:20,776 INFO L82 PathProgramCache]: Analyzing trace with hash 685617471, now seen corresponding path program 1 times [2021-10-13 01:25:20,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:20,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732079790] [2021-10-13 01:25:20,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:20,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:20,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:20,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:25:20,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:21,006 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 01:25:21,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:21,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732079790] [2021-10-13 01:25:21,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732079790] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:25:21,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:25:21,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-13 01:25:21,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294793040] [2021-10-13 01:25:21,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 01:25:21,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:21,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 01:25:21,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:25:21,010 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:25:21,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:21,474 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2021-10-13 01:25:21,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 01:25:21,475 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-10-13 01:25:21,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:21,477 INFO L225 Difference]: With dead ends: 128 [2021-10-13 01:25:21,477 INFO L226 Difference]: Without dead ends: 128 [2021-10-13 01:25:21,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 176.5ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-10-13 01:25:21,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-13 01:25:21,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 104. [2021-10-13 01:25:21,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 66 states have (on average 1.621212121212121) internal successors, (107), 97 states have internal predecessors, (107), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:25:21,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2021-10-13 01:25:21,484 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 24 [2021-10-13 01:25:21,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:21,485 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2021-10-13 01:25:21,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:25:21,485 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2021-10-13 01:25:21,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 01:25:21,486 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:21,487 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:21,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-13 01:25:21,487 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:21,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:21,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1780011878, now seen corresponding path program 1 times [2021-10-13 01:25:21,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:21,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201477011] [2021-10-13 01:25:21,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:21,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:21,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:21,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:21,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:25:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:21,608 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 01:25:21,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:21,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201477011] [2021-10-13 01:25:21,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201477011] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:25:21,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:25:21,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 01:25:21,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106127491] [2021-10-13 01:25:21,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 01:25:21,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:21,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 01:25:21,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 01:25:21,612 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:25:21,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:21,881 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2021-10-13 01:25:21,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 01:25:21,882 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-10-13 01:25:21,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:21,883 INFO L225 Difference]: With dead ends: 99 [2021-10-13 01:25:21,883 INFO L226 Difference]: Without dead ends: 99 [2021-10-13 01:25:21,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:25:21,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-13 01:25:21,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-10-13 01:25:21,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 60 states have (on average 1.6166666666666667) internal successors, (97), 91 states have internal predecessors, (97), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:25:21,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2021-10-13 01:25:21,889 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 26 [2021-10-13 01:25:21,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:21,889 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2021-10-13 01:25:21,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:25:21,890 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2021-10-13 01:25:21,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 01:25:21,891 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:21,891 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:21,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-13 01:25:21,891 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr40ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:21,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:21,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1780011234, now seen corresponding path program 1 times [2021-10-13 01:25:21,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:21,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938962320] [2021-10-13 01:25:21,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:21,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:21,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:21,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:25:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:22,015 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 01:25:22,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:22,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938962320] [2021-10-13 01:25:22,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938962320] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:25:22,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:25:22,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-13 01:25:22,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228741903] [2021-10-13 01:25:22,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 01:25:22,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:22,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 01:25:22,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:25:22,018 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:25:22,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:22,354 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-10-13 01:25:22,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 01:25:22,355 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-10-13 01:25:22,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:22,356 INFO L225 Difference]: With dead ends: 96 [2021-10-13 01:25:22,357 INFO L226 Difference]: Without dead ends: 96 [2021-10-13 01:25:22,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-13 01:25:22,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-13 01:25:22,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-10-13 01:25:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 58 states have (on average 1.6206896551724137) internal successors, (94), 89 states have internal predecessors, (94), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:25:22,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2021-10-13 01:25:22,361 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 26 [2021-10-13 01:25:22,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:22,362 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2021-10-13 01:25:22,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:25:22,362 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2021-10-13 01:25:22,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 01:25:22,369 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:22,369 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:22,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-13 01:25:22,370 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:22,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:22,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1634399054, now seen corresponding path program 1 times [2021-10-13 01:25:22,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:22,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823646858] [2021-10-13 01:25:22,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:22,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:22,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:22,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:25:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:22,606 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 01:25:22,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:22,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823646858] [2021-10-13 01:25:22,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823646858] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:25:22,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:25:22,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-13 01:25:22,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814237463] [2021-10-13 01:25:22,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 01:25:22,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:22,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 01:25:22,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:25:22,609 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:25:22,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:22,997 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2021-10-13 01:25:22,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 01:25:22,998 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-10-13 01:25:22,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:22,999 INFO L225 Difference]: With dead ends: 95 [2021-10-13 01:25:22,999 INFO L226 Difference]: Without dead ends: 95 [2021-10-13 01:25:23,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-10-13 01:25:23,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-13 01:25:23,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-10-13 01:25:23,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 58 states have (on average 1.603448275862069) internal successors, (93), 88 states have internal predecessors, (93), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:25:23,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 100 transitions. [2021-10-13 01:25:23,005 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 100 transitions. Word has length 27 [2021-10-13 01:25:23,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:23,006 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 100 transitions. [2021-10-13 01:25:23,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:25:23,006 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 100 transitions. [2021-10-13 01:25:23,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 01:25:23,008 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:23,008 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:23,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-13 01:25:23,008 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:23,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:23,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1634399055, now seen corresponding path program 1 times [2021-10-13 01:25:23,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:23,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232118448] [2021-10-13 01:25:23,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:23,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:23,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:23,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:25:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:23,108 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 01:25:23,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:23,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232118448] [2021-10-13 01:25:23,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232118448] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:25:23,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:25:23,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 01:25:23,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972829068] [2021-10-13 01:25:23,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 01:25:23,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:23,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 01:25:23,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 01:25:23,111 INFO L87 Difference]: Start difference. First operand 95 states and 100 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:25:23,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:23,391 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-10-13 01:25:23,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 01:25:23,392 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-10-13 01:25:23,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:23,393 INFO L225 Difference]: With dead ends: 94 [2021-10-13 01:25:23,393 INFO L226 Difference]: Without dead ends: 94 [2021-10-13 01:25:23,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 01:25:23,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-13 01:25:23,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-10-13 01:25:23,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.5862068965517242) internal successors, (92), 87 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:25:23,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2021-10-13 01:25:23,398 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 27 [2021-10-13 01:25:23,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:23,398 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2021-10-13 01:25:23,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:25:23,399 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2021-10-13 01:25:23,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 01:25:23,400 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:23,400 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:23,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-13 01:25:23,400 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr10ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:23,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:23,401 INFO L82 PathProgramCache]: Analyzing trace with hash 873236865, now seen corresponding path program 1 times [2021-10-13 01:25:23,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:23,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826862855] [2021-10-13 01:25:23,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:23,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:23,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:23,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:25:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:23,749 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 01:25:23,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:23,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826862855] [2021-10-13 01:25:23,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826862855] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:25:23,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:25:23,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-13 01:25:23,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574114484] [2021-10-13 01:25:23,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 01:25:23,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:23,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 01:25:23,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-10-13 01:25:23,754 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:25:24,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:24,928 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2021-10-13 01:25:24,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 01:25:24,929 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-10-13 01:25:24,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:24,931 INFO L225 Difference]: With dead ends: 142 [2021-10-13 01:25:24,931 INFO L226 Difference]: Without dead ends: 142 [2021-10-13 01:25:24,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 687.0ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-10-13 01:25:24,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-13 01:25:24,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 109. [2021-10-13 01:25:24,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 72 states have (on average 1.4861111111111112) internal successors, (107), 101 states have internal predecessors, (107), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-13 01:25:24,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2021-10-13 01:25:24,939 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 28 [2021-10-13 01:25:24,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:24,940 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2021-10-13 01:25:24,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:25:24,940 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2021-10-13 01:25:24,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 01:25:24,943 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:24,943 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] [2021-10-13 01:25:24,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-13 01:25:24,944 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:24,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:24,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1313641447, now seen corresponding path program 1 times [2021-10-13 01:25:24,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:24,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212615140] [2021-10-13 01:25:24,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:24,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:25,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:25,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:25,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:25:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:25:25,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:25,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212615140] [2021-10-13 01:25:25,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212615140] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:25:25,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467929845] [2021-10-13 01:25:25,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:25,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:25:25,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:25:25,167 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:25:25,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 01:25:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:25,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 01:25:25,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:25:25,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 01:25:25,690 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-10-13 01:25:25,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-10-13 01:25:25,884 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 01:25:25,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-10-13 01:25:26,123 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 01:25:26,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2021-10-13 01:25:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:25:26,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467929845] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:25:26,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:25:26,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-10-13 01:25:26,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875885899] [2021-10-13 01:25:26,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 01:25:26,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:26,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 01:25:26,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-10-13 01:25:26,183 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 01:25:27,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:27,248 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-10-13 01:25:27,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 01:25:27,248 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-10-13 01:25:27,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:27,250 INFO L225 Difference]: With dead ends: 113 [2021-10-13 01:25:27,250 INFO L226 Difference]: Without dead ends: 113 [2021-10-13 01:25:27,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 760.7ms TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-10-13 01:25:27,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-13 01:25:27,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2021-10-13 01:25:27,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 72 states have (on average 1.4722222222222223) internal successors, (106), 100 states have internal predecessors, (106), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:25:27,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2021-10-13 01:25:27,256 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 29 [2021-10-13 01:25:27,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:27,256 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2021-10-13 01:25:27,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 01:25:27,256 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2021-10-13 01:25:27,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 01:25:27,257 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:27,257 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] [2021-10-13 01:25:27,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 01:25:27,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-13 01:25:27,475 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting appendErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:27,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:27,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1313641446, now seen corresponding path program 1 times [2021-10-13 01:25:27,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:27,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348492876] [2021-10-13 01:25:27,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:27,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:27,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:27,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:27,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:25:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:25:27,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:27,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348492876] [2021-10-13 01:25:27,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348492876] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:25:27,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716452473] [2021-10-13 01:25:27,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:27,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:25:27,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:25:27,794 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:25:27,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 01:25:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:28,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-13 01:25:28,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:25:28,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-13 01:25:28,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 01:25:28,512 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-10-13 01:25:28,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-10-13 01:25:28,544 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 01:25:28,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-13 01:25:28,707 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 01:25:28,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-13 01:25:28,725 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 01:25:28,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 42 [2021-10-13 01:25:28,961 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 01:25:28,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 46 [2021-10-13 01:25:28,972 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 01:25:28,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-10-13 01:25:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:25:29,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716452473] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:25:29,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:25:29,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-10-13 01:25:29,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127531334] [2021-10-13 01:25:29,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 01:25:29,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:29,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 01:25:29,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-10-13 01:25:29,035 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand has 21 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 01:25:30,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:30,764 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2021-10-13 01:25:30,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 01:25:30,765 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-10-13 01:25:30,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:30,766 INFO L225 Difference]: With dead ends: 109 [2021-10-13 01:25:30,766 INFO L226 Difference]: Without dead ends: 109 [2021-10-13 01:25:30,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1295.6ms TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 01:25:30,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-13 01:25:30,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2021-10-13 01:25:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.4583333333333333) internal successors, (105), 99 states have internal predecessors, (105), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:25:30,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2021-10-13 01:25:30,772 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 29 [2021-10-13 01:25:30,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:30,772 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2021-10-13 01:25:30,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 01:25:30,773 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2021-10-13 01:25:30,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 01:25:30,773 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:30,773 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:30,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 01:25:30,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-13 01:25:30,995 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr11ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:30,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:30,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1300539121, now seen corresponding path program 1 times [2021-10-13 01:25:30,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:30,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406255095] [2021-10-13 01:25:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:30,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:31,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:31,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:25:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:31,401 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 01:25:31,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:31,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406255095] [2021-10-13 01:25:31,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406255095] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:25:31,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:25:31,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-13 01:25:31,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716576678] [2021-10-13 01:25:31,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 01:25:31,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:31,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 01:25:31,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-10-13 01:25:31,404 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:25:32,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:32,571 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2021-10-13 01:25:32,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 01:25:32,573 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-10-13 01:25:32,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:32,574 INFO L225 Difference]: With dead ends: 142 [2021-10-13 01:25:32,575 INFO L226 Difference]: Without dead ends: 142 [2021-10-13 01:25:32,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 671.3ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-10-13 01:25:32,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-13 01:25:32,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2021-10-13 01:25:32,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 73 states have (on average 1.452054794520548) internal successors, (106), 100 states have internal predecessors, (106), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:25:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2021-10-13 01:25:32,585 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 29 [2021-10-13 01:25:32,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:32,586 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2021-10-13 01:25:32,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:25:32,587 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2021-10-13 01:25:32,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 01:25:32,588 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:32,588 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:32,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-13 01:25:32,589 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr12ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:32,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:32,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1662007171, now seen corresponding path program 1 times [2021-10-13 01:25:32,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:32,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519089230] [2021-10-13 01:25:32,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:32,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:32,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:32,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:25:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:32,980 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 01:25:32,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:32,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519089230] [2021-10-13 01:25:32,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519089230] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:25:32,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:25:32,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-13 01:25:32,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428567796] [2021-10-13 01:25:32,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 01:25:32,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:32,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 01:25:32,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-10-13 01:25:32,983 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:25:33,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:33,749 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2021-10-13 01:25:33,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 01:25:33,750 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-10-13 01:25:33,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:33,752 INFO L225 Difference]: With dead ends: 119 [2021-10-13 01:25:33,752 INFO L226 Difference]: Without dead ends: 119 [2021-10-13 01:25:33,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 419.3ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-10-13 01:25:33,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-13 01:25:33,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2021-10-13 01:25:33,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 74 states have (on average 1.445945945945946) internal successors, (107), 101 states have internal predecessors, (107), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:25:33,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2021-10-13 01:25:33,757 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 30 [2021-10-13 01:25:33,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:33,757 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2021-10-13 01:25:33,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:25:33,757 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2021-10-13 01:25:33,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 01:25:33,758 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:33,758 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:33,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-13 01:25:33,758 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:33,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:33,762 INFO L82 PathProgramCache]: Analyzing trace with hash -17385164, now seen corresponding path program 1 times [2021-10-13 01:25:33,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:33,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814972341] [2021-10-13 01:25:33,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:33,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:33,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:33,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:25:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:33,955 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 01:25:33,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:33,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814972341] [2021-10-13 01:25:33,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814972341] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:25:33,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:25:33,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-13 01:25:33,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689379754] [2021-10-13 01:25:33,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 01:25:33,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:33,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 01:25:33,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:25:33,959 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:25:34,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:34,364 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2021-10-13 01:25:34,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 01:25:34,365 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-10-13 01:25:34,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:34,366 INFO L225 Difference]: With dead ends: 109 [2021-10-13 01:25:34,366 INFO L226 Difference]: Without dead ends: 109 [2021-10-13 01:25:34,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 176.4ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-10-13 01:25:34,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-13 01:25:34,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2021-10-13 01:25:34,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 74 states have (on average 1.4324324324324325) internal successors, (106), 100 states have internal predecessors, (106), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:25:34,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2021-10-13 01:25:34,372 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 31 [2021-10-13 01:25:34,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:34,372 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2021-10-13 01:25:34,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:25:34,372 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2021-10-13 01:25:34,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 01:25:34,373 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:34,373 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:34,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-13 01:25:34,373 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:34,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:34,374 INFO L82 PathProgramCache]: Analyzing trace with hash -17385163, now seen corresponding path program 1 times [2021-10-13 01:25:34,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:34,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350113499] [2021-10-13 01:25:34,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:34,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:34,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:34,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:34,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:25:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:34,491 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 01:25:34,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:34,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350113499] [2021-10-13 01:25:34,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350113499] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:25:34,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:25:34,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 01:25:34,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337112844] [2021-10-13 01:25:34,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 01:25:34,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:34,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 01:25:34,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:25:34,496 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:25:34,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:34,683 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2021-10-13 01:25:34,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 01:25:34,683 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-10-13 01:25:34,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:34,684 INFO L225 Difference]: With dead ends: 101 [2021-10-13 01:25:34,685 INFO L226 Difference]: Without dead ends: 101 [2021-10-13 01:25:34,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-13 01:25:34,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-13 01:25:34,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-10-13 01:25:34,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 74 states have (on average 1.3243243243243243) internal successors, (98), 93 states have internal predecessors, (98), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:25:34,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2021-10-13 01:25:34,692 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 31 [2021-10-13 01:25:34,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:34,692 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2021-10-13 01:25:34,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:25:34,692 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2021-10-13 01:25:34,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 01:25:34,693 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:34,693 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:34,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-13 01:25:34,694 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr15ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:34,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:34,694 INFO L82 PathProgramCache]: Analyzing trace with hash -538940057, now seen corresponding path program 1 times [2021-10-13 01:25:34,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:34,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880491116] [2021-10-13 01:25:34,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:34,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:34,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:34,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:25:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:34,838 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 01:25:34,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:34,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880491116] [2021-10-13 01:25:34,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880491116] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:25:34,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:25:34,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 01:25:34,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750624925] [2021-10-13 01:25:34,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 01:25:34,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:34,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 01:25:34,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:25:34,841 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:25:35,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:35,107 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2021-10-13 01:25:35,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 01:25:35,107 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-10-13 01:25:35,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:35,108 INFO L225 Difference]: With dead ends: 100 [2021-10-13 01:25:35,108 INFO L226 Difference]: Without dead ends: 100 [2021-10-13 01:25:35,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-13 01:25:35,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-13 01:25:35,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-10-13 01:25:35,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 92 states have internal predecessors, (97), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:25:35,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2021-10-13 01:25:35,113 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 32 [2021-10-13 01:25:35,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:35,113 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2021-10-13 01:25:35,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:25:35,114 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2021-10-13 01:25:35,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 01:25:35,114 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:35,114 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:35,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-13 01:25:35,115 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr16ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:35,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:35,115 INFO L82 PathProgramCache]: Analyzing trace with hash 472727508, now seen corresponding path program 1 times [2021-10-13 01:25:35,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:35,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454886987] [2021-10-13 01:25:35,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:35,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:35,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:35,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:25:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:35,254 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 01:25:35,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:35,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454886987] [2021-10-13 01:25:35,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454886987] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:25:35,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:25:35,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 01:25:35,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729734415] [2021-10-13 01:25:35,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 01:25:35,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:35,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 01:25:35,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:25:35,257 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:25:35,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:35,586 INFO L93 Difference]: Finished difference Result 99 states and 103 transitions. [2021-10-13 01:25:35,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 01:25:35,591 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2021-10-13 01:25:35,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:35,592 INFO L225 Difference]: With dead ends: 99 [2021-10-13 01:25:35,592 INFO L226 Difference]: Without dead ends: 99 [2021-10-13 01:25:35,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-13 01:25:35,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-13 01:25:35,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-10-13 01:25:35,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 74 states have (on average 1.2972972972972974) internal successors, (96), 91 states have internal predecessors, (96), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:25:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2021-10-13 01:25:35,595 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 33 [2021-10-13 01:25:35,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:35,596 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2021-10-13 01:25:35,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:25:35,596 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2021-10-13 01:25:35,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 01:25:35,596 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:35,596 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:35,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-13 01:25:35,597 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr17ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:35,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:35,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1769650953, now seen corresponding path program 1 times [2021-10-13 01:25:35,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:35,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178062627] [2021-10-13 01:25:35,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:35,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:35,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:35,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:25:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:36,030 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 01:25:36,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:36,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178062627] [2021-10-13 01:25:36,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178062627] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:25:36,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:25:36,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-13 01:25:36,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527499792] [2021-10-13 01:25:36,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 01:25:36,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:36,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 01:25:36,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-10-13 01:25:36,033 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:25:36,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:36,690 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2021-10-13 01:25:36,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 01:25:36,691 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2021-10-13 01:25:36,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:36,693 INFO L225 Difference]: With dead ends: 124 [2021-10-13 01:25:36,693 INFO L226 Difference]: Without dead ends: 124 [2021-10-13 01:25:36,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 393.3ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-10-13 01:25:36,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-13 01:25:36,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2021-10-13 01:25:36,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.2765957446808511) internal successors, (120), 111 states have internal predecessors, (120), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-13 01:25:36,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2021-10-13 01:25:36,704 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 34 [2021-10-13 01:25:36,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:36,704 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2021-10-13 01:25:36,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:25:36,705 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2021-10-13 01:25:36,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 01:25:36,705 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:36,706 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:36,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-13 01:25:36,706 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:36,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:36,707 INFO L82 PathProgramCache]: Analyzing trace with hash -975395209, now seen corresponding path program 1 times [2021-10-13 01:25:36,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:36,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351644762] [2021-10-13 01:25:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:36,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:36,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:36,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:25:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:36,862 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 01:25:36,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:36,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351644762] [2021-10-13 01:25:36,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351644762] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:25:36,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:25:36,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-13 01:25:36,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588916532] [2021-10-13 01:25:36,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 01:25:36,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:36,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 01:25:36,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:25:36,865 INFO L87 Difference]: Start difference. First operand 120 states and 128 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:25:37,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:37,224 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2021-10-13 01:25:37,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 01:25:37,224 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2021-10-13 01:25:37,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:37,226 INFO L225 Difference]: With dead ends: 126 [2021-10-13 01:25:37,226 INFO L226 Difference]: Without dead ends: 126 [2021-10-13 01:25:37,226 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-10-13 01:25:37,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-13 01:25:37,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-10-13 01:25:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 99 states have (on average 1.2626262626262625) internal successors, (125), 116 states have internal predecessors, (125), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-13 01:25:37,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 133 transitions. [2021-10-13 01:25:37,233 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 133 transitions. Word has length 35 [2021-10-13 01:25:37,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:37,234 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 133 transitions. [2021-10-13 01:25:37,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:25:37,234 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 133 transitions. [2021-10-13 01:25:37,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-13 01:25:37,235 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:37,235 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:37,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-13 01:25:37,236 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:37,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:37,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1581588223, now seen corresponding path program 1 times [2021-10-13 01:25:37,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:37,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784306803] [2021-10-13 01:25:37,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:37,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:37,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:37,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:25:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:37,809 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 01:25:37,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:37,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784306803] [2021-10-13 01:25:37,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784306803] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:25:37,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:25:37,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-13 01:25:37,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115595263] [2021-10-13 01:25:37,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 01:25:37,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:37,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 01:25:37,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-10-13 01:25:37,813 INFO L87 Difference]: Start difference. First operand 125 states and 133 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:25:38,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:38,708 INFO L93 Difference]: Finished difference Result 137 states and 144 transitions. [2021-10-13 01:25:38,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 01:25:38,709 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2021-10-13 01:25:38,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:38,710 INFO L225 Difference]: With dead ends: 137 [2021-10-13 01:25:38,710 INFO L226 Difference]: Without dead ends: 137 [2021-10-13 01:25:38,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 679.6ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-10-13 01:25:38,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-10-13 01:25:38,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 128. [2021-10-13 01:25:38,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 102 states have (on average 1.2647058823529411) internal successors, (129), 119 states have internal predecessors, (129), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-13 01:25:38,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2021-10-13 01:25:38,723 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 39 [2021-10-13 01:25:38,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:38,723 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2021-10-13 01:25:38,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:25:38,725 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2021-10-13 01:25:38,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-13 01:25:38,725 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:38,726 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:38,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-13 01:25:38,726 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr40ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:38,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:38,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1581588867, now seen corresponding path program 1 times [2021-10-13 01:25:38,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:38,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967217138] [2021-10-13 01:25:38,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:38,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:39,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:39,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:25:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:39,620 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 01:25:39,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:39,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967217138] [2021-10-13 01:25:39,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967217138] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:25:39,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:25:39,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-10-13 01:25:39,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758461622] [2021-10-13 01:25:39,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 01:25:39,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:39,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 01:25:39,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-10-13 01:25:39,622 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:25:40,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:40,614 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2021-10-13 01:25:40,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 01:25:40,614 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2021-10-13 01:25:40,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:40,615 INFO L225 Difference]: With dead ends: 133 [2021-10-13 01:25:40,616 INFO L226 Difference]: Without dead ends: 114 [2021-10-13 01:25:40,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 708.9ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-10-13 01:25:40,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-13 01:25:40,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-10-13 01:25:40,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 104 states have internal predecessors, (113), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-13 01:25:40,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2021-10-13 01:25:40,621 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 39 [2021-10-13 01:25:40,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:40,622 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2021-10-13 01:25:40,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:25:40,622 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2021-10-13 01:25:40,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-13 01:25:40,623 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:40,623 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:40,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-13 01:25:40,623 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr10ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:40,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:40,624 INFO L82 PathProgramCache]: Analyzing trace with hash -425207857, now seen corresponding path program 1 times [2021-10-13 01:25:40,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:40,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506574953] [2021-10-13 01:25:40,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:40,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:40,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:40,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:25:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:40,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:25:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:25:40,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:40,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506574953] [2021-10-13 01:25:40,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506574953] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:25:40,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800694251] [2021-10-13 01:25:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:40,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:25:40,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:25:40,839 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:25:40,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 01:25:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:41,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-13 01:25:41,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:25:41,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 01:25:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:25:41,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800694251] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:25:41,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:25:41,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-10-13 01:25:41,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034364785] [2021-10-13 01:25:41,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 01:25:41,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:41,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 01:25:41,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-10-13 01:25:41,363 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:25:42,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:42,032 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2021-10-13 01:25:42,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 01:25:42,033 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 42 [2021-10-13 01:25:42,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:42,034 INFO L225 Difference]: With dead ends: 89 [2021-10-13 01:25:42,034 INFO L226 Difference]: Without dead ends: 89 [2021-10-13 01:25:42,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 527.3ms TimeCoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 01:25:42,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-13 01:25:42,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-10-13 01:25:42,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 64 states have (on average 1.3125) internal successors, (84), 81 states have internal predecessors, (84), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:25:42,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2021-10-13 01:25:42,038 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 42 [2021-10-13 01:25:42,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:42,038 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2021-10-13 01:25:42,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:25:42,038 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2021-10-13 01:25:42,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-13 01:25:42,039 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:42,040 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:42,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 01:25:42,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-13 01:25:42,241 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr10ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:42,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:42,241 INFO L82 PathProgramCache]: Analyzing trace with hash -44963474, now seen corresponding path program 1 times [2021-10-13 01:25:42,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:42,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949137880] [2021-10-13 01:25:42,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:42,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:42,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:42,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:25:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:42,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:25:42,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:43,086 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:25:43,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:43,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949137880] [2021-10-13 01:25:43,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949137880] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:25:43,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285510631] [2021-10-13 01:25:43,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:43,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:25:43,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:25:43,091 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:25:43,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 01:25:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:43,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 78 conjunts are in the unsatisfiable core [2021-10-13 01:25:43,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:25:43,353 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 01:25:43,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 01:25:43,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-10-13 01:25:43,716 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 01:25:43,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2021-10-13 01:25:43,812 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 01:25:43,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-13 01:25:44,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 106 [2021-10-13 01:25:44,743 INFO L354 Elim1Store]: treesize reduction 489, result has 8.9 percent of original size [2021-10-13 01:25:44,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 246 treesize of output 170 [2021-10-13 01:25:44,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 104 [2021-10-13 01:25:44,765 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-10-13 01:25:44,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 110 [2021-10-13 01:25:44,779 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-13 01:25:44,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 77 [2021-10-13 01:25:45,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 55 [2021-10-13 01:25:45,309 INFO L354 Elim1Store]: treesize reduction 54, result has 5.3 percent of original size [2021-10-13 01:25:45,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 36 [2021-10-13 01:25:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:25:45,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285510631] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:25:45,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:25:45,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 37 [2021-10-13 01:25:45,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078406753] [2021-10-13 01:25:45,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-13 01:25:45,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:45,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-13 01:25:45,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 01:25:45,317 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 38 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 01:25:48,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:48,100 INFO L93 Difference]: Finished difference Result 149 states and 156 transitions. [2021-10-13 01:25:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-13 01:25:48,102 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 45 [2021-10-13 01:25:48,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:48,103 INFO L225 Difference]: With dead ends: 149 [2021-10-13 01:25:48,103 INFO L226 Difference]: Without dead ends: 149 [2021-10-13 01:25:48,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 2859.8ms TimeCoverageRelationStatistics Valid=450, Invalid=4380, Unknown=0, NotChecked=0, Total=4830 [2021-10-13 01:25:48,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-13 01:25:48,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 88. [2021-10-13 01:25:48,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.296875) internal successors, (83), 80 states have internal predecessors, (83), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:25:48,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2021-10-13 01:25:48,109 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 45 [2021-10-13 01:25:48,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:48,110 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2021-10-13 01:25:48,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 01:25:48,110 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2021-10-13 01:25:48,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-13 01:25:48,111 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:48,111 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:25:48,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 01:25:48,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-13 01:25:48,339 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr11ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:25:48,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:48,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1393867612, now seen corresponding path program 1 times [2021-10-13 01:25:48,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:48,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797221777] [2021-10-13 01:25:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:48,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:48,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:25:48,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:48,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:25:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:48,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:25:48,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:25:49,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:25:49,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797221777] [2021-10-13 01:25:49,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797221777] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:25:49,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174734293] [2021-10-13 01:25:49,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:49,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:25:49,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:25:49,839 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:25:49,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 01:25:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:25:50,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 70 conjunts are in the unsatisfiable core [2021-10-13 01:25:50,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:25:50,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 01:25:50,552 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-13 01:25:50,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2021-10-13 01:25:50,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 01:25:50,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 01:25:50,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2021-10-13 01:25:50,844 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 01:25:50,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 20 [2021-10-13 01:25:50,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 01:26:01,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 01:26:01,278 INFO L354 Elim1Store]: treesize reduction 227, result has 11.0 percent of original size [2021-10-13 01:26:01,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 109 [2021-10-13 01:26:01,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 147 [2021-10-13 01:26:01,304 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-10-13 01:26:01,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 75 [2021-10-13 01:26:01,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 82 [2021-10-13 01:26:01,800 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-10-13 01:26:01,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 30 [2021-10-13 01:26:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:26:01,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174734293] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:26:01,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:26:01,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-10-13 01:26:01,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875119904] [2021-10-13 01:26:01,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-13 01:26:01,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:26:01,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-13 01:26:01,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1380, Unknown=9, NotChecked=0, Total=1482 [2021-10-13 01:26:01,819 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 39 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 01:27:24,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:27:24,266 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2021-10-13 01:27:24,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 01:27:24,267 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 46 [2021-10-13 01:27:24,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:27:24,268 INFO L225 Difference]: With dead ends: 114 [2021-10-13 01:27:24,268 INFO L226 Difference]: Without dead ends: 114 [2021-10-13 01:27:24,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 50231.8ms TimeCoverageRelationStatistics Valid=364, Invalid=3771, Unknown=25, NotChecked=0, Total=4160 [2021-10-13 01:27:24,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-13 01:27:24,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2021-10-13 01:27:24,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.28125) internal successors, (82), 79 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:27:24,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-10-13 01:27:24,275 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 46 [2021-10-13 01:27:24,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:27:24,276 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-10-13 01:27:24,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 01:27:24,276 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-10-13 01:27:24,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-13 01:27:24,277 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:27:24,277 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:27:24,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-13 01:27:24,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-13 01:27:24,491 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr12ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:27:24,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:27:24,492 INFO L82 PathProgramCache]: Analyzing trace with hash -260222928, now seen corresponding path program 1 times [2021-10-13 01:27:24,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:27:24,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380062545] [2021-10-13 01:27:24,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:27:24,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:27:24,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:27:24,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:27:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:27:24,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:27:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:27:25,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:27:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:27:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:27:25,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:27:25,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380062545] [2021-10-13 01:27:25,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380062545] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:27:25,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56560203] [2021-10-13 01:27:25,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:27:25,986 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:27:25,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:27:25,991 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:27:26,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 01:27:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:27:26,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 80 conjunts are in the unsatisfiable core [2021-10-13 01:27:26,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:27:26,421 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 01:27:26,617 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 01:27:26,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-13 01:27:26,841 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-13 01:27:26,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 38 [2021-10-13 01:27:26,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 01:27:26,990 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 01:27:26,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-13 01:27:28,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 01:27:28,535 INFO L354 Elim1Store]: treesize reduction 429, result has 10.1 percent of original size [2021-10-13 01:27:28,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 210 treesize of output 152 [2021-10-13 01:27:28,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 251 treesize of output 227 [2021-10-13 01:27:28,556 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-10-13 01:27:28,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 166 treesize of output 76 [2021-10-13 01:27:28,621 INFO L354 Elim1Store]: treesize reduction 210, result has 25.5 percent of original size [2021-10-13 01:27:28,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 90 treesize of output 128 [2021-10-13 01:27:29,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 129 [2021-10-13 01:27:29,346 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-10-13 01:27:29,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 127 treesize of output 49 [2021-10-13 01:27:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:27:29,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56560203] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:27:29,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:27:29,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 42 [2021-10-13 01:27:29,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42934311] [2021-10-13 01:27:29,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-13 01:27:29,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:27:29,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-13 01:27:29,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2021-10-13 01:27:29,667 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 43 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 01:27:55,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:27:55,268 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2021-10-13 01:27:55,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 01:27:55,269 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 47 [2021-10-13 01:27:55,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:27:55,270 INFO L225 Difference]: With dead ends: 87 [2021-10-13 01:27:55,270 INFO L226 Difference]: Without dead ends: 87 [2021-10-13 01:27:55,272 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 5766.2ms TimeCoverageRelationStatistics Valid=306, Invalid=3000, Unknown=0, NotChecked=0, Total=3306 [2021-10-13 01:27:55,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-13 01:27:55,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2021-10-13 01:27:55,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.265625) internal successors, (81), 78 states have internal predecessors, (81), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:27:55,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2021-10-13 01:27:55,276 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 47 [2021-10-13 01:27:55,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:27:55,277 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2021-10-13 01:27:55,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 01:27:55,277 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2021-10-13 01:27:55,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-13 01:27:55,278 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:27:55,278 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:27:55,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 01:27:55,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:27:55,483 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr17ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:27:55,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:27:55,484 INFO L82 PathProgramCache]: Analyzing trace with hash -735988426, now seen corresponding path program 1 times [2021-10-13 01:27:55,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:27:55,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455106932] [2021-10-13 01:27:55,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:27:55,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:27:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:27:55,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:27:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:27:55,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:27:55,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:27:56,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:27:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:27:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:27:56,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:27:56,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455106932] [2021-10-13 01:27:56,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455106932] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:27:56,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183314847] [2021-10-13 01:27:56,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:27:56,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:27:56,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:27:56,993 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:27:56,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 01:27:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:27:57,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 85 conjunts are in the unsatisfiable core [2021-10-13 01:27:57,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:27:57,606 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 01:27:57,852 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 01:27:57,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-13 01:27:58,140 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-13 01:27:58,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 38 [2021-10-13 01:27:58,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 01:27:58,296 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 01:27:58,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-13 01:28:27,735 INFO L354 Elim1Store]: treesize reduction 439, result has 8.0 percent of original size [2021-10-13 01:28:27,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 204 treesize of output 136 [2021-10-13 01:28:27,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 209 [2021-10-13 01:28:27,757 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-13 01:28:27,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 120 [2021-10-13 01:28:27,786 INFO L354 Elim1Store]: treesize reduction 84, result has 30.6 percent of original size [2021-10-13 01:28:27,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 84 [2021-10-13 01:28:28,646 INFO L354 Elim1Store]: treesize reduction 33, result has 48.4 percent of original size [2021-10-13 01:28:28,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 54 [2021-10-13 01:28:28,826 INFO L354 Elim1Store]: treesize reduction 50, result has 38.3 percent of original size [2021-10-13 01:28:28,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 136 treesize of output 76 [2021-10-13 01:28:28,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 52 [2021-10-13 01:28:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:28:29,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183314847] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:28:29,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:28:29,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 46 [2021-10-13 01:28:29,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113718057] [2021-10-13 01:28:29,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-10-13 01:28:29,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:28:29,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-10-13 01:28:29,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1994, Unknown=15, NotChecked=0, Total=2162 [2021-10-13 01:28:29,235 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 47 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 43 states have internal predecessors, (86), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 01:29:55,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:29:55,658 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2021-10-13 01:29:55,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 01:29:55,658 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 43 states have internal predecessors, (86), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 51 [2021-10-13 01:29:55,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:29:55,659 INFO L225 Difference]: With dead ends: 142 [2021-10-13 01:29:55,659 INFO L226 Difference]: Without dead ends: 142 [2021-10-13 01:29:55,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 69431.7ms TimeCoverageRelationStatistics Valid=403, Invalid=4678, Unknown=31, NotChecked=0, Total=5112 [2021-10-13 01:29:55,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-13 01:29:55,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 103. [2021-10-13 01:29:55,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 80 states have (on average 1.225) internal successors, (98), 94 states have internal predecessors, (98), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:29:55,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2021-10-13 01:29:55,666 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 51 [2021-10-13 01:29:55,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:29:55,667 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2021-10-13 01:29:55,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 43 states have internal predecessors, (86), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 01:29:55,667 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2021-10-13 01:29:55,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-13 01:29:55,668 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:29:55,669 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:29:55,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 01:29:55,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:29:55,891 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:29:55,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:29:55,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1340804630, now seen corresponding path program 1 times [2021-10-13 01:29:55,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:29:55,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426740796] [2021-10-13 01:29:55,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:29:55,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:29:55,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:29:56,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:29:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:29:56,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:29:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:29:56,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:29:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:29:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:29:56,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:29:56,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426740796] [2021-10-13 01:29:56,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426740796] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:29:56,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091832298] [2021-10-13 01:29:56,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:29:56,166 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:29:56,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:29:56,171 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:29:56,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 01:29:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:29:56,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-13 01:29:56,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:29:57,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 01:29:57,176 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 01:29:57,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-13 01:29:57,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-10-13 01:29:57,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-10-13 01:29:57,393 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 01:29:57,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-10-13 01:29:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:29:57,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091832298] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:29:57,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:29:57,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-10-13 01:29:57,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299845113] [2021-10-13 01:29:57,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 01:29:57,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:29:57,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 01:29:57,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-10-13 01:29:57,442 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 16 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:29:58,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:29:58,051 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2021-10-13 01:29:58,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 01:29:58,052 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 52 [2021-10-13 01:29:58,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:29:58,053 INFO L225 Difference]: With dead ends: 128 [2021-10-13 01:29:58,053 INFO L226 Difference]: Without dead ends: 128 [2021-10-13 01:29:58,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 461.2ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-10-13 01:29:58,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-13 01:29:58,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2021-10-13 01:29:58,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 80 states have (on average 1.2125) internal successors, (97), 93 states have internal predecessors, (97), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:29:58,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2021-10-13 01:29:58,058 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 52 [2021-10-13 01:29:58,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:29:58,058 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2021-10-13 01:29:58,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:29:58,059 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2021-10-13 01:29:58,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-13 01:29:58,059 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:29:58,059 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:29:58,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 01:29:58,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-13 01:29:58,271 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:29:58,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:29:58,271 INFO L82 PathProgramCache]: Analyzing trace with hash -685098252, now seen corresponding path program 1 times [2021-10-13 01:29:58,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:29:58,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281544896] [2021-10-13 01:29:58,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:29:58,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:29:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:29:59,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:29:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:29:59,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:29:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:29:59,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:29:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:30:00,495 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:30:00,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:30:00,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281544896] [2021-10-13 01:30:00,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281544896] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:30:00,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639937253] [2021-10-13 01:30:00,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:30:00,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:30:00,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:30:00,497 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:30:00,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 01:30:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:30:01,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 99 conjunts are in the unsatisfiable core [2021-10-13 01:30:01,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:30:01,136 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 01:30:01,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-13 01:30:01,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 01:30:01,791 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-13 01:30:01,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 41 [2021-10-13 01:30:02,024 INFO L354 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2021-10-13 01:30:02,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-10-13 01:30:10,087 INFO L354 Elim1Store]: treesize reduction 439, result has 8.0 percent of original size [2021-10-13 01:30:10,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 228 treesize of output 144 [2021-10-13 01:30:10,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 265 treesize of output 249 [2021-10-13 01:30:10,106 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-10-13 01:30:10,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 192 treesize of output 70 [2021-10-13 01:30:10,122 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-10-13 01:30:10,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 106 [2021-10-13 01:30:11,209 INFO L354 Elim1Store]: treesize reduction 41, result has 48.8 percent of original size [2021-10-13 01:30:11,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 62 [2021-10-13 01:30:11,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2021-10-13 01:30:11,857 INFO L354 Elim1Store]: treesize reduction 71, result has 15.5 percent of original size [2021-10-13 01:30:11,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 42 [2021-10-13 01:30:12,054 INFO L354 Elim1Store]: treesize reduction 28, result has 30.0 percent of original size [2021-10-13 01:30:12,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 102 treesize of output 65 [2021-10-13 01:30:12,404 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-10-13 01:30:12,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 40 [2021-10-13 01:30:12,538 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:30:12,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639937253] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:30:12,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:30:12,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 57 [2021-10-13 01:30:12,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856209053] [2021-10-13 01:30:12,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-10-13 01:30:12,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:30:12,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-10-13 01:30:12,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3106, Unknown=3, NotChecked=0, Total=3306 [2021-10-13 01:30:12,542 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 58 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 54 states have internal predecessors, (96), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 01:30:22,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:30:22,210 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2021-10-13 01:30:22,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-13 01:30:22,211 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 54 states have internal predecessors, (96), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 56 [2021-10-13 01:30:22,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:30:22,212 INFO L225 Difference]: With dead ends: 139 [2021-10-13 01:30:22,212 INFO L226 Difference]: Without dead ends: 139 [2021-10-13 01:30:22,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2341 ImplicationChecksByTransitivity, 17646.4ms TimeCoverageRelationStatistics Valid=574, Invalid=8165, Unknown=3, NotChecked=0, Total=8742 [2021-10-13 01:30:22,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-13 01:30:22,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 107. [2021-10-13 01:30:22,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 85 states have (on average 1.223529411764706) internal successors, (104), 98 states have internal predecessors, (104), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:30:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2021-10-13 01:30:22,220 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 56 [2021-10-13 01:30:22,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:30:22,220 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2021-10-13 01:30:22,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 54 states have internal predecessors, (96), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 01:30:22,221 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2021-10-13 01:30:22,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-13 01:30:22,222 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:30:22,222 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:30:22,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 01:30:22,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:30:22,447 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr25REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:30:22,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:30:22,447 INFO L82 PathProgramCache]: Analyzing trace with hash -685098251, now seen corresponding path program 1 times [2021-10-13 01:30:22,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:30:22,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945290896] [2021-10-13 01:30:22,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:30:22,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:30:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:30:22,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:30:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:30:22,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:30:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:30:22,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:30:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:30:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:30:23,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:30:23,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945290896] [2021-10-13 01:30:23,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945290896] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:30:23,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161961822] [2021-10-13 01:30:23,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:30:23,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:30:23,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:30:23,836 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:30:23,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 01:30:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:30:24,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 76 conjunts are in the unsatisfiable core [2021-10-13 01:30:24,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:30:24,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 01:30:25,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 01:30:25,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:30:25,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-10-13 01:30:28,453 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-13 01:30:28,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 80 [2021-10-13 01:30:29,853 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 01:30:29,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 59 [2021-10-13 01:30:29,882 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 01:30:29,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-13 01:30:30,775 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-10-13 01:30:30,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 96 treesize of output 77 [2021-10-13 01:30:30,799 INFO L354 Elim1Store]: treesize reduction 72, result has 13.3 percent of original size [2021-10-13 01:30:30,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 68 treesize of output 53 [2021-10-13 01:30:30,974 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 01:30:30,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 47 [2021-10-13 01:30:30,979 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 01:30:30,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2021-10-13 01:30:31,000 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:30:31,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161961822] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:30:31,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:30:31,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2021-10-13 01:30:31,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179480017] [2021-10-13 01:30:31,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-13 01:30:31,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:30:31,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-13 01:30:31,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1210, Unknown=1, NotChecked=0, Total=1332 [2021-10-13 01:30:31,003 INFO L87 Difference]: Start difference. First operand 107 states and 113 transitions. Second operand has 37 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 34 states have internal predecessors, (87), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:30:45,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:30:45,585 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2021-10-13 01:30:45,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 01:30:45,586 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 34 states have internal predecessors, (87), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 56 [2021-10-13 01:30:45,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:30:45,587 INFO L225 Difference]: With dead ends: 139 [2021-10-13 01:30:45,588 INFO L226 Difference]: Without dead ends: 139 [2021-10-13 01:30:45,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 16579.4ms TimeCoverageRelationStatistics Valid=343, Invalid=3194, Unknown=3, NotChecked=0, Total=3540 [2021-10-13 01:30:45,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-13 01:30:45,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 111. [2021-10-13 01:30:45,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 89 states have (on average 1.2247191011235956) internal successors, (109), 102 states have internal predecessors, (109), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:30:45,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 118 transitions. [2021-10-13 01:30:45,592 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 118 transitions. Word has length 56 [2021-10-13 01:30:45,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:30:45,593 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 118 transitions. [2021-10-13 01:30:45,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 34 states have internal predecessors, (87), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:30:45,593 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 118 transitions. [2021-10-13 01:30:45,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-13 01:30:45,594 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:30:45,594 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:30:45,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 01:30:45,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-13 01:30:45,811 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr40ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:30:45,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:30:45,812 INFO L82 PathProgramCache]: Analyzing trace with hash -685098896, now seen corresponding path program 1 times [2021-10-13 01:30:45,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:30:45,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801168288] [2021-10-13 01:30:45,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:30:45,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:30:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:30:46,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:30:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:30:46,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:30:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:30:46,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:30:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:30:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:30:46,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:30:46,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801168288] [2021-10-13 01:30:46,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801168288] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:30:46,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603405716] [2021-10-13 01:30:46,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:30:46,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:30:46,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:30:46,662 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:30:46,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 01:30:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:30:47,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 58 conjunts are in the unsatisfiable core [2021-10-13 01:30:47,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:30:47,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 01:31:01,422 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 01:31:01,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 36 [2021-10-13 01:31:01,432 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 01:31:01,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-10-13 01:31:01,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-10-13 01:31:02,036 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 01:31:02,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 26 [2021-10-13 01:31:02,124 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 01:31:02,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-10-13 01:31:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:31:02,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603405716] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:31:02,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:31:02,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35 [2021-10-13 01:31:02,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633683230] [2021-10-13 01:31:02,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-13 01:31:02,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:31:02,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-13 01:31:02,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1074, Unknown=7, NotChecked=0, Total=1190 [2021-10-13 01:31:02,137 INFO L87 Difference]: Start difference. First operand 111 states and 118 transitions. Second operand has 35 states, 34 states have (on average 2.5) internal successors, (85), 32 states have internal predecessors, (85), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:31:41,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:31:41,604 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2021-10-13 01:31:41,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 01:31:41,605 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.5) internal successors, (85), 32 states have internal predecessors, (85), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 56 [2021-10-13 01:31:41,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:31:41,606 INFO L225 Difference]: With dead ends: 135 [2021-10-13 01:31:41,606 INFO L226 Difference]: Without dead ends: 135 [2021-10-13 01:31:41,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 28027.1ms TimeCoverageRelationStatistics Valid=322, Invalid=2855, Unknown=15, NotChecked=0, Total=3192 [2021-10-13 01:31:41,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-13 01:31:41,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 111. [2021-10-13 01:31:41,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 89 states have (on average 1.202247191011236) internal successors, (107), 102 states have internal predecessors, (107), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:31:41,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 116 transitions. [2021-10-13 01:31:41,612 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 116 transitions. Word has length 56 [2021-10-13 01:31:41,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:31:41,612 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 116 transitions. [2021-10-13 01:31:41,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.5) internal successors, (85), 32 states have internal predecessors, (85), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:31:41,613 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 116 transitions. [2021-10-13 01:31:41,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-13 01:31:41,614 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:31:41,614 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:31:41,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 01:31:41,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-13 01:31:41,819 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr35ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:31:41,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:31:41,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1896261991, now seen corresponding path program 1 times [2021-10-13 01:31:41,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:31:41,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105139891] [2021-10-13 01:31:41,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:31:41,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:31:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:31:42,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:31:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:31:42,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:31:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:31:42,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:31:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:31:42,992 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:31:42,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:31:42,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105139891] [2021-10-13 01:31:42,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105139891] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:31:42,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135627692] [2021-10-13 01:31:42,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:31:42,993 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:31:42,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:31:42,995 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:31:42,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 01:31:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:31:43,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-13 01:31:43,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:31:44,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 01:31:49,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2021-10-13 01:31:50,091 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 01:31:50,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 33 [2021-10-13 01:31:50,110 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 01:31:50,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-13 01:31:50,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-10-13 01:31:50,826 INFO L354 Elim1Store]: treesize reduction 72, result has 13.3 percent of original size [2021-10-13 01:31:50,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 31 [2021-10-13 01:31:51,065 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 01:31:51,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2021-10-13 01:31:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:31:51,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135627692] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:31:51,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:31:51,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 35 [2021-10-13 01:31:51,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021870041] [2021-10-13 01:31:51,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-13 01:31:51,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:31:51,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-13 01:31:51,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1128, Unknown=3, NotChecked=0, Total=1260 [2021-10-13 01:31:51,074 INFO L87 Difference]: Start difference. First operand 111 states and 116 transitions. Second operand has 36 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 33 states have internal predecessors, (95), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:32:33,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:32:33,809 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2021-10-13 01:32:33,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 01:32:33,809 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 33 states have internal predecessors, (95), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 60 [2021-10-13 01:32:33,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:32:33,811 INFO L225 Difference]: With dead ends: 134 [2021-10-13 01:32:33,811 INFO L226 Difference]: Without dead ends: 134 [2021-10-13 01:32:33,812 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 22520.9ms TimeCoverageRelationStatistics Valid=367, Invalid=3046, Unknown=9, NotChecked=0, Total=3422 [2021-10-13 01:32:33,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-13 01:32:33,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 121. [2021-10-13 01:32:33,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 99 states have (on average 1.2525252525252526) internal successors, (124), 112 states have internal predecessors, (124), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:32:33,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 133 transitions. [2021-10-13 01:32:33,817 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 133 transitions. Word has length 60 [2021-10-13 01:32:33,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:32:33,818 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 133 transitions. [2021-10-13 01:32:33,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 33 states have internal predecessors, (95), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:32:33,818 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 133 transitions. [2021-10-13 01:32:33,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-13 01:32:33,819 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:32:33,819 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:32:33,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 01:32:34,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-13 01:32:34,035 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr29REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:32:34,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:32:34,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1896248059, now seen corresponding path program 1 times [2021-10-13 01:32:34,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:32:34,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527262141] [2021-10-13 01:32:34,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:32:34,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:32:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:32:34,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:32:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:32:34,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:32:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:32:34,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:32:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:32:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:32:35,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:32:35,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527262141] [2021-10-13 01:32:35,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527262141] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:32:35,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099747475] [2021-10-13 01:32:35,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:32:35,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:32:35,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:32:35,448 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:32:35,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 01:32:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:32:36,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-13 01:32:36,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:32:36,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 01:32:36,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 01:32:36,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:32:36,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-10-13 01:32:36,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:32:36,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-10-13 01:32:36,962 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-13 01:32:36,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 50 [2021-10-13 01:32:36,983 INFO L354 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2021-10-13 01:32:36,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 70 [2021-10-13 01:32:37,159 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 01:32:37,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-13 01:32:37,932 INFO L354 Elim1Store]: treesize reduction 108, result has 12.2 percent of original size [2021-10-13 01:32:37,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 88 treesize of output 73 [2021-10-13 01:32:37,946 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 01:32:37,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 44 [2021-10-13 01:32:38,385 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 01:32:38,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 47 [2021-10-13 01:32:38,391 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 01:32:38,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2021-10-13 01:32:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:32:38,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099747475] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:32:38,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:32:38,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 39 [2021-10-13 01:32:38,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721921200] [2021-10-13 01:32:38,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-13 01:32:38,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:32:38,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-13 01:32:38,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1443, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 01:32:38,401 INFO L87 Difference]: Start difference. First operand 121 states and 133 transitions. Second operand has 40 states, 38 states have (on average 2.736842105263158) internal successors, (104), 37 states have internal predecessors, (104), 4 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:32:41,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:32:41,573 INFO L93 Difference]: Finished difference Result 136 states and 141 transitions. [2021-10-13 01:32:41,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 01:32:41,573 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.736842105263158) internal successors, (104), 37 states have internal predecessors, (104), 4 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 60 [2021-10-13 01:32:41,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:32:41,575 INFO L225 Difference]: With dead ends: 136 [2021-10-13 01:32:41,575 INFO L226 Difference]: Without dead ends: 136 [2021-10-13 01:32:41,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 3818.3ms TimeCoverageRelationStatistics Valid=434, Invalid=4122, Unknown=0, NotChecked=0, Total=4556 [2021-10-13 01:32:41,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-13 01:32:41,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 121. [2021-10-13 01:32:41,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 99 states have (on average 1.2424242424242424) internal successors, (123), 112 states have internal predecessors, (123), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:32:41,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 132 transitions. [2021-10-13 01:32:41,580 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 132 transitions. Word has length 60 [2021-10-13 01:32:41,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:32:41,581 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 132 transitions. [2021-10-13 01:32:41,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.736842105263158) internal successors, (104), 37 states have internal predecessors, (104), 4 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:32:41,581 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 132 transitions. [2021-10-13 01:32:41,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-13 01:32:41,582 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:32:41,582 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:32:41,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-13 01:32:41,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-13 01:32:41,795 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:32:41,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:32:41,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1896248058, now seen corresponding path program 1 times [2021-10-13 01:32:41,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:32:41,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636282174] [2021-10-13 01:32:41,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:32:41,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:32:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:32:41,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:32:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:32:41,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:32:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:32:41,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:32:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:32:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-13 01:32:41,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:32:41,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636282174] [2021-10-13 01:32:41,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636282174] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:32:41,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:32:41,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 01:32:41,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677841627] [2021-10-13 01:32:41,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 01:32:41,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:32:41,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 01:32:41,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 01:32:41,967 INFO L87 Difference]: Start difference. First operand 121 states and 132 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:32:42,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:32:42,265 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2021-10-13 01:32:42,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 01:32:42,266 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 60 [2021-10-13 01:32:42,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:32:42,267 INFO L225 Difference]: With dead ends: 127 [2021-10-13 01:32:42,267 INFO L226 Difference]: Without dead ends: 127 [2021-10-13 01:32:42,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 01:32:42,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-13 01:32:42,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2021-10-13 01:32:42,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 99 states have (on average 1.2222222222222223) internal successors, (121), 111 states have internal predecessors, (121), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:32:42,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 130 transitions. [2021-10-13 01:32:42,272 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 130 transitions. Word has length 60 [2021-10-13 01:32:42,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:32:42,273 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 130 transitions. [2021-10-13 01:32:42,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:32:42,273 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 130 transitions. [2021-10-13 01:32:42,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-13 01:32:42,274 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:32:42,274 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:32:42,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-10-13 01:32:42,275 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr36ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:32:42,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:32:42,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1345420281, now seen corresponding path program 1 times [2021-10-13 01:32:42,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:32:42,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271283173] [2021-10-13 01:32:42,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:32:42,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:32:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:32:42,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:32:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:32:42,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:32:42,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:32:42,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:32:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:32:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:32:42,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:32:42,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271283173] [2021-10-13 01:32:42,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271283173] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:32:42,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762984539] [2021-10-13 01:32:42,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:32:42,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:32:42,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:32:42,982 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:32:42,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 01:32:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:32:43,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-13 01:32:43,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:32:44,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 01:32:44,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 01:33:01,101 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 01:33:01,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 40 [2021-10-13 01:33:01,111 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 01:33:01,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-10-13 01:33:01,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-10-13 01:33:01,746 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 01:33:01,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 30 [2021-10-13 01:33:01,964 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 01:33:01,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-10-13 01:33:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:33:01,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762984539] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:33:01,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:33:01,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 34 [2021-10-13 01:33:01,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629495137] [2021-10-13 01:33:01,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-13 01:33:01,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:33:01,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-13 01:33:01,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1076, Unknown=9, NotChecked=0, Total=1190 [2021-10-13 01:33:01,978 INFO L87 Difference]: Start difference. First operand 120 states and 130 transitions. Second operand has 35 states, 33 states have (on average 2.909090909090909) internal successors, (96), 32 states have internal predecessors, (96), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:34:59,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:34:59,097 INFO L93 Difference]: Finished difference Result 130 states and 135 transitions. [2021-10-13 01:34:59,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 01:34:59,097 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.909090909090909) internal successors, (96), 32 states have internal predecessors, (96), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 61 [2021-10-13 01:34:59,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:34:59,098 INFO L225 Difference]: With dead ends: 130 [2021-10-13 01:34:59,098 INFO L226 Difference]: Without dead ends: 130 [2021-10-13 01:34:59,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 59068.4ms TimeCoverageRelationStatistics Valid=327, Invalid=2949, Unknown=30, NotChecked=0, Total=3306 [2021-10-13 01:34:59,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-13 01:34:59,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 121. [2021-10-13 01:34:59,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 100 states have (on average 1.22) internal successors, (122), 112 states have internal predecessors, (122), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:34:59,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2021-10-13 01:34:59,106 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 61 [2021-10-13 01:34:59,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:34:59,106 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2021-10-13 01:34:59,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.909090909090909) internal successors, (96), 32 states have internal predecessors, (96), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:34:59,107 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2021-10-13 01:34:59,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-13 01:34:59,107 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:34:59,108 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:34:59,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-13 01:34:59,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:34:59,323 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr30ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:34:59,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:34:59,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1345852280, now seen corresponding path program 1 times [2021-10-13 01:34:59,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:34:59,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054561846] [2021-10-13 01:34:59,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:34:59,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:34:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:35:00,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:35:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:35:00,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:35:00,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:35:00,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:35:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:35:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:35:01,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:35:01,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054561846] [2021-10-13 01:35:01,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054561846] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:35:01,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447007513] [2021-10-13 01:35:01,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:35:01,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:35:01,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:35:01,571 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:35:01,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 01:35:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:35:02,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 102 conjunts are in the unsatisfiable core [2021-10-13 01:35:02,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:35:02,650 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 01:35:03,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-13 01:35:03,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 01:35:03,141 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 01:35:03,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-13 01:35:24,839 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 01:35:24,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 133 [2021-10-13 01:35:24,908 INFO L354 Elim1Store]: treesize reduction 490, result has 9.8 percent of original size [2021-10-13 01:35:24,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 259 treesize of output 188 [2021-10-13 01:35:24,918 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-13 01:35:24,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 137 treesize of output 93 [2021-10-13 01:35:24,930 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-10-13 01:35:24,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 79 [2021-10-13 01:35:26,432 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-10-13 01:35:26,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 133 treesize of output 90 [2021-10-13 01:35:26,486 INFO L354 Elim1Store]: treesize reduction 184, result has 8.9 percent of original size [2021-10-13 01:35:26,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 93 treesize of output 94 [2021-10-13 01:35:26,954 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 01:35:26,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 62 [2021-10-13 01:35:27,155 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-10-13 01:35:27,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 36 [2021-10-13 01:35:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:35:27,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447007513] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:35:27,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:35:27,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27] total 54 [2021-10-13 01:35:27,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349292626] [2021-10-13 01:35:27,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-10-13 01:35:27,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:35:27,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-10-13 01:35:27,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2772, Unknown=9, NotChecked=0, Total=2970 [2021-10-13 01:35:27,164 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand has 55 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 states have internal predecessors, (101), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 01:36:04,970 WARN L207 SmtUtils]: Spent 6.51 s on a formula simplification. DAG size of input: 97 DAG size of output: 89 [2021-10-13 01:36:08,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:36:08,611 INFO L93 Difference]: Finished difference Result 160 states and 166 transitions. [2021-10-13 01:36:08,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 01:36:08,612 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 states have internal predecessors, (101), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 61 [2021-10-13 01:36:08,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:36:08,613 INFO L225 Difference]: With dead ends: 160 [2021-10-13 01:36:08,613 INFO L226 Difference]: Without dead ends: 160 [2021-10-13 01:36:08,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 39049.3ms TimeCoverageRelationStatistics Valid=634, Invalid=7013, Unknown=9, NotChecked=0, Total=7656 [2021-10-13 01:36:08,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-13 01:36:08,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 121. [2021-10-13 01:36:08,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 100 states have (on average 1.21) internal successors, (121), 112 states have internal predecessors, (121), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:36:08,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 130 transitions. [2021-10-13 01:36:08,618 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 130 transitions. Word has length 61 [2021-10-13 01:36:08,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:36:08,619 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 130 transitions. [2021-10-13 01:36:08,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 states have internal predecessors, (101), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 01:36:08,619 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 130 transitions. [2021-10-13 01:36:08,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-13 01:36:08,620 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:36:08,620 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:36:08,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-13 01:36:08,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-13 01:36:08,834 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr37ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:36:08,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:36:08,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1241644393, now seen corresponding path program 1 times [2021-10-13 01:36:08,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:36:08,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38279333] [2021-10-13 01:36:08,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:36:08,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:36:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:36:08,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:36:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:36:08,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:36:08,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:36:08,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:36:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:36:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-13 01:36:08,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:36:08,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38279333] [2021-10-13 01:36:08,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38279333] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:36:08,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:36:08,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 01:36:08,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122697426] [2021-10-13 01:36:08,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 01:36:08,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:36:08,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 01:36:08,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 01:36:08,988 INFO L87 Difference]: Start difference. First operand 121 states and 130 transitions. Second operand has 7 states, 6 states have (on average 7.5) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:36:09,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:36:09,306 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2021-10-13 01:36:09,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 01:36:09,306 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.5) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 62 [2021-10-13 01:36:09,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:36:09,307 INFO L225 Difference]: With dead ends: 128 [2021-10-13 01:36:09,307 INFO L226 Difference]: Without dead ends: 128 [2021-10-13 01:36:09,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 01:36:09,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-13 01:36:09,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-10-13 01:36:09,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 105 states have (on average 1.2190476190476192) internal successors, (128), 117 states have internal predecessors, (128), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:36:09,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 137 transitions. [2021-10-13 01:36:09,310 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 137 transitions. Word has length 62 [2021-10-13 01:36:09,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:36:09,310 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 137 transitions. [2021-10-13 01:36:09,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.5) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:36:09,311 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 137 transitions. [2021-10-13 01:36:09,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-13 01:36:09,311 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:36:09,311 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:36:09,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-10-13 01:36:09,312 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr31ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:36:09,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:36:09,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1228252410, now seen corresponding path program 1 times [2021-10-13 01:36:09,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:36:09,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765435597] [2021-10-13 01:36:09,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:36:09,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:36:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:36:10,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:36:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:36:10,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:36:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:36:10,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:36:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:36:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:36:11,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:36:11,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765435597] [2021-10-13 01:36:11,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765435597] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:36:11,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622979706] [2021-10-13 01:36:11,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:36:11,674 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:36:11,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:36:11,679 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:36:11,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 01:36:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:36:12,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 94 conjunts are in the unsatisfiable core [2021-10-13 01:36:12,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:36:12,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 01:36:13,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 01:36:13,333 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-13 01:36:13,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 36 [2021-10-13 01:36:13,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 01:36:13,517 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 01:36:13,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-13 01:36:13,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 01:36:13,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 28 [2021-10-13 01:36:43,048 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-10-13 01:36:43,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 102 [2021-10-13 01:36:43,077 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 01:36:43,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 87 [2021-10-13 01:36:43,096 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-10-13 01:36:43,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 71 [2021-10-13 01:36:44,293 INFO L354 Elim1Store]: treesize reduction 108, result has 12.2 percent of original size [2021-10-13 01:36:44,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 108 treesize of output 79 [2021-10-13 01:36:44,319 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-10-13 01:36:44,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 76 treesize of output 73 [2021-10-13 01:36:44,913 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 01:36:44,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 59 [2021-10-13 01:36:45,053 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-10-13 01:36:45,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 31 [2021-10-13 01:36:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:36:45,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622979706] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:36:45,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:36:45,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 23] total 51 [2021-10-13 01:36:45,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176679498] [2021-10-13 01:36:45,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-13 01:36:45,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:36:45,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-13 01:36:45,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2490, Unknown=13, NotChecked=0, Total=2652 [2021-10-13 01:36:45,083 INFO L87 Difference]: Start difference. First operand 126 states and 137 transitions. Second operand has 52 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 01:38:02,556 WARN L207 SmtUtils]: Spent 6.87 s on a formula simplification. DAG size of input: 117 DAG size of output: 85 [2021-10-13 01:38:11,964 WARN L207 SmtUtils]: Spent 5.33 s on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-10-13 01:38:21,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:38:21,967 INFO L93 Difference]: Finished difference Result 179 states and 190 transitions. [2021-10-13 01:38:21,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-10-13 01:38:21,968 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 62 [2021-10-13 01:38:21,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:38:21,969 INFO L225 Difference]: With dead ends: 179 [2021-10-13 01:38:21,969 INFO L226 Difference]: Without dead ends: 179 [2021-10-13 01:38:21,971 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2499 ImplicationChecksByTransitivity, 83374.0ms TimeCoverageRelationStatistics Valid=862, Invalid=9415, Unknown=25, NotChecked=0, Total=10302 [2021-10-13 01:38:21,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-10-13 01:38:21,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 126. [2021-10-13 01:38:21,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 105 states have (on average 1.2095238095238094) internal successors, (127), 117 states have internal predecessors, (127), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:38:21,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2021-10-13 01:38:21,975 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 62 [2021-10-13 01:38:21,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:38:21,975 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2021-10-13 01:38:21,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 01:38:21,976 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2021-10-13 01:38:21,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-13 01:38:21,976 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:38:21,976 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:38:22,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-13 01:38:22,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-10-13 01:38:22,203 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr38REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:38:22,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:38:22,205 INFO L82 PathProgramCache]: Analyzing trace with hash -163729334, now seen corresponding path program 1 times [2021-10-13 01:38:22,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:38:22,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791654557] [2021-10-13 01:38:22,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:38:22,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:38:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:38:22,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:38:22,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:38:22,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:38:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:38:22,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 01:38:22,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:38:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-13 01:38:22,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:38:22,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791654557] [2021-10-13 01:38:22,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791654557] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:38:22,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:38:22,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-13 01:38:22,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303093201] [2021-10-13 01:38:22,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 01:38:22,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:38:22,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 01:38:22,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:38:22,409 INFO L87 Difference]: Start difference. First operand 126 states and 136 transitions. Second operand has 9 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:38:22,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:38:22,663 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2021-10-13 01:38:22,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 01:38:22,663 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2021-10-13 01:38:22,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:38:22,664 INFO L225 Difference]: With dead ends: 125 [2021-10-13 01:38:22,664 INFO L226 Difference]: Without dead ends: 125 [2021-10-13 01:38:22,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:38:22,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-13 01:38:22,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-10-13 01:38:22,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 105 states have (on average 1.2) internal successors, (126), 116 states have internal predecessors, (126), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:38:22,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2021-10-13 01:38:22,668 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 63 [2021-10-13 01:38:22,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:38:22,670 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2021-10-13 01:38:22,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:38:22,670 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2021-10-13 01:38:22,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-13 01:38:22,671 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:38:22,671 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:38:22,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-10-13 01:38:22,672 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr32ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-13 01:38:22,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:38:22,672 INFO L82 PathProgramCache]: Analyzing trace with hash -578880822, now seen corresponding path program 1 times [2021-10-13 01:38:22,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:38:22,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6180442] [2021-10-13 01:38:22,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:38:22,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:38:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:38:22,812 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 01:38:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:38:22,923 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 01:38:22,923 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 01:38:22,924 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr32ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:38:22,925 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-13 01:38:22,926 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-13 01:38:22,926 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-13 01:38:22,926 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-13 01:38:22,926 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-13 01:38:22,926 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-13 01:38:22,926 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-13 01:38:22,927 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-13 01:38:22,927 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-13 01:38:22,927 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-13 01:38:22,927 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:38:22,927 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:38:22,928 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:38:22,928 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-13 01:38:22,928 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-13 01:38:22,928 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:38:22,928 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:38:22,928 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:38:22,928 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-13 01:38:22,929 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-13 01:38:22,929 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-13 01:38:22,929 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-13 01:38:22,929 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-13 01:38:22,929 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-10-13 01:38:22,929 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-10-13 01:38:22,930 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-10-13 01:38:22,930 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26REQUIRES_VIOLATION [2021-10-13 01:38:22,930 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-10-13 01:38:22,930 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-10-13 01:38:22,930 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION [2021-10-13 01:38:22,930 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:38:22,931 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:38:22,931 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33REQUIRES_VIOLATION [2021-10-13 01:38:22,931 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34REQUIRES_VIOLATION [2021-10-13 01:38:22,931 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:38:22,931 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:38:22,931 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:38:22,932 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38REQUIRES_VIOLATION [2021-10-13 01:38:22,932 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39REQUIRES_VIOLATION [2021-10-13 01:38:22,932 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40ENSURES_VIOLATIONMEMORY_LEAK [2021-10-13 01:38:22,932 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr0REQUIRES_VIOLATION [2021-10-13 01:38:22,932 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr1REQUIRES_VIOLATION [2021-10-13 01:38:22,932 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr2REQUIRES_VIOLATION [2021-10-13 01:38:22,933 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr3REQUIRES_VIOLATION [2021-10-13 01:38:22,933 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr4REQUIRES_VIOLATION [2021-10-13 01:38:22,933 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr5REQUIRES_VIOLATION [2021-10-13 01:38:22,933 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr6REQUIRES_VIOLATION [2021-10-13 01:38:22,933 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr7REQUIRES_VIOLATION [2021-10-13 01:38:22,933 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr8REQUIRES_VIOLATION [2021-10-13 01:38:22,933 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr9REQUIRES_VIOLATION [2021-10-13 01:38:22,934 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr10REQUIRES_VIOLATION [2021-10-13 01:38:22,934 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr11REQUIRES_VIOLATION [2021-10-13 01:38:22,934 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr12REQUIRES_VIOLATION [2021-10-13 01:38:22,934 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr13REQUIRES_VIOLATION [2021-10-13 01:38:22,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-10-13 01:38:22,945 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 01:38:23,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 01:38:23 BoogieIcfgContainer [2021-10-13 01:38:23,007 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 01:38:23,008 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 01:38:23,008 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 01:38:23,008 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 01:38:23,009 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:25:16" (3/4) ... [2021-10-13 01:38:23,010 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 01:38:23,084 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 01:38:23,084 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 01:38:23,085 INFO L168 Benchmark]: Toolchain (without parser) took 788610.92 ms. Allocated memory was 96.5 MB in the beginning and 503.3 MB in the end (delta: 406.8 MB). Free memory was 52.9 MB in the beginning and 391.7 MB in the end (delta: -338.8 MB). Peak memory consumption was 63.4 MB. Max. memory is 16.1 GB. [2021-10-13 01:38:23,085 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 96.5 MB. Free memory is still 70.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:38:23,085 INFO L168 Benchmark]: CACSL2BoogieTranslator took 632.29 ms. Allocated memory is still 96.5 MB. Free memory was 52.6 MB in the beginning and 64.3 MB in the end (delta: -11.7 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. [2021-10-13 01:38:23,086 INFO L168 Benchmark]: Boogie Preprocessor took 97.80 ms. Allocated memory is still 96.5 MB. Free memory was 64.3 MB in the beginning and 61.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 01:38:23,087 INFO L168 Benchmark]: RCFGBuilder took 1064.41 ms. Allocated memory was 96.5 MB in the beginning and 125.8 MB in the end (delta: 29.4 MB). Free memory was 61.4 MB in the beginning and 99.8 MB in the end (delta: -38.4 MB). Peak memory consumption was 31.0 MB. Max. memory is 16.1 GB. [2021-10-13 01:38:23,087 INFO L168 Benchmark]: TraceAbstraction took 786730.37 ms. Allocated memory was 125.8 MB in the beginning and 503.3 MB in the end (delta: 377.5 MB). Free memory was 99.3 MB in the beginning and 394.8 MB in the end (delta: -295.5 MB). Peak memory consumption was 78.1 MB. Max. memory is 16.1 GB. [2021-10-13 01:38:23,087 INFO L168 Benchmark]: Witness Printer took 76.08 ms. Allocated memory is still 503.3 MB. Free memory was 394.8 MB in the beginning and 391.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 01:38:23,090 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 96.5 MB. Free memory is still 70.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 632.29 ms. Allocated memory is still 96.5 MB. Free memory was 52.6 MB in the beginning and 64.3 MB in the end (delta: -11.7 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 97.80 ms. Allocated memory is still 96.5 MB. Free memory was 64.3 MB in the beginning and 61.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1064.41 ms. Allocated memory was 96.5 MB in the beginning and 125.8 MB in the end (delta: 29.4 MB). Free memory was 61.4 MB in the beginning and 99.8 MB in the end (delta: -38.4 MB). Peak memory consumption was 31.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 786730.37 ms. Allocated memory was 125.8 MB in the beginning and 503.3 MB in the end (delta: 377.5 MB). Free memory was 99.3 MB in the beginning and 394.8 MB in the end (delta: -295.5 MB). Peak memory consumption was 78.1 MB. Max. memory is 16.1 GB. * Witness Printer took 76.08 ms. Allocated memory is still 503.3 MB. Free memory was 394.8 MB in the beginning and 391.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 552]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L539] struct item *list = ((void *)0); VAL [list={3:0}] [L541] CALL append(&list) VAL [plist={3:0}] [L530] struct item *item = malloc(sizeof *item); [L531] EXPR \read(**plist) VAL [\read(**plist)={0:0}, item={-4:0}, plist={3:0}, plist={3:0}] [L531] item->next = *plist VAL [\read(**plist)={0:0}, item={-4:0}, plist={3:0}, plist={3:0}] [L532] EXPR item->next VAL [item={-4:0}, item->next={0:0}, plist={3:0}, plist={3:0}] [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={-3:0}, item={-4:0}, item->next={0:0}, malloc(sizeof *item)={-3:0}, plist={3:0}, plist={3:0}] [L532-L534] item->data = (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={-3:0}, item={-4:0}, item->next={0:0}, malloc(sizeof *item)={-3:0}, plist={3:0}, plist={3:0}] [L535] *plist = item VAL [item={-4:0}, plist={3:0}, plist={3:0}] [L541] RET append(&list) VAL [list={3:0}] [L542] COND TRUE __VERIFIER_nondet_int() [L541] CALL append(&list) VAL [plist={3:0}] [L530] struct item *item = malloc(sizeof *item); [L531] EXPR \read(**plist) VAL [\read(**plist)={-4:0}, item={-2:0}, plist={3:0}, plist={3:0}] [L531] item->next = *plist VAL [\read(**plist)={-4:0}, item={-2:0}, plist={3:0}, plist={3:0}] [L532] EXPR item->next VAL [item={-2:0}, item->next={-4:0}, plist={3:0}, plist={3:0}] [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [item={-2:0}, item->next={-4:0}, plist={3:0}, plist={3:0}] [L533] EXPR item->next VAL [item={-2:0}, item->next={-4:0}, item->next={-4:0}, plist={3:0}, plist={3:0}] [L533] EXPR item->next->data VAL [item={-2:0}, item->next={-4:0}, item->next={-4:0}, item->next->data={-3:0}, plist={3:0}, plist={3:0}] [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={-3:0}, item={-2:0}, item->next={-4:0}, item->next={-4:0}, item->next->data={-3:0}, plist={3:0}, plist={3:0}] [L532-L534] item->data = (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={-3:0}, item={-2:0}, item->next={-4:0}, item->next={-4:0}, item->next->data={-3:0}, plist={3:0}, plist={3:0}] [L535] *plist = item VAL [item={-2:0}, plist={3:0}, plist={3:0}] [L541] RET append(&list) VAL [list={3:0}] [L542] COND FALSE !(__VERIFIER_nondet_int()) [L543] \read(*list) VAL [\read(*list)={-2:0}, list={3:0}] [L543] COND TRUE \read(*list) [L544] EXPR \read(*list) VAL [\read(*list)={-2:0}, list={3:0}] [L544] EXPR list->next VAL [\read(*list)={-2:0}, list={3:0}, list->next={-4:0}] [L544] struct item *next = list->next; [L545] EXPR \read(*list) VAL [\read(*list)={-2:0}, list={3:0}, next={-4:0}] [L545] EXPR list->data VAL [\read(*list)={-2:0}, list={3:0}, list->data={-3:0}, next={-4:0}] [L545] free(list->data) VAL [\read(*list)={-2:0}, list={3:0}, list->data={-3:0}, next={-4:0}] [L545] free(list->data) VAL [\read(*list)={-2:0}, list={3:0}, list->data={-3:0}, next={-4:0}] [L545] free(list->data) [L546] EXPR \read(*list) VAL [\read(*list)={-2:0}, list={3:0}, next={-4:0}] [L546] free(list) VAL [\read(*list)={-2:0}, list={3:0}, next={-4:0}] [L546] free(list) VAL [\read(*list)={-2:0}, list={3:0}, next={-4:0}] [L546] free(list) [L547] list = next VAL [list={3:0}, next={-4:0}] [L549] \read(*list) VAL [\read(*list)={-4:0}, list={3:0}, next={-4:0}] [L549] COND TRUE \read(*list) [L550] EXPR \read(*list) VAL [\read(*list)={-4:0}, list={3:0}, next={-4:0}] [L550] EXPR list->next VAL [\read(*list)={-4:0}, list={3:0}, list->next={0:0}, next={-4:0}] [L550] struct item *next = list->next; [L551] COND TRUE !next VAL [list={3:0}, next={-4:0}, next={0:0}] [L552] EXPR \read(*list) VAL [\read(*list)={-4:0}, list={3:0}, next={0:0}, next={-4:0}] [L552] EXPR list->data VAL [\read(*list)={-4:0}, list={3:0}, list->data={-3:0}, next={-4:0}, next={0:0}] [L552] free(list->data) VAL [\read(*list)={-4:0}, list={3:0}, list->data={-3:0}, next={-4:0}, next={0:0}] [L552] free(list->data) VAL [\read(*list)={-4:0}, list={3:0}, list->data={-3:0}, next={-4:0}, next={0:0}] [L552] free(list->data) VAL [\read(*list)={-4:0}, list={3:0}, list->data={-3:0}, next={-4:0}, next={0:0}] - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 132 locations, 55 error locations. Started 1 CEGAR loops. OverallTime: 786554.6ms, OverallIterations: 44, TraceHistogramMax: 2, EmptinessCheckTime: 54.9ms, AutomataDifference: 579118.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 21.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2318 SDtfs, 5940 SDslu, 16035 SDs, 0 SdLazy, 27901 SolverSat, 1261 SolverUnsat, 171 SolverUnknown, 0 SolverNotchecked, 327094.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1966 GetRequests, 699 SyntacticMatches, 13 SemanticMatches, 1254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15193 ImplicationChecksByTransitivity, 407225.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=128occurred in iteration=25, InterpolantAutomatonStates: 734, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 284.9ms AutomataMinimizationTime, 43 MinimizatonAttempts, 549 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 347.9ms SsaConstructionTime, 1640.0ms SatisfiabilityAnalysisTime, 191081.2ms InterpolantComputationTime, 2466 NumberOfCodeBlocks, 2466 NumberOfCodeBlocksAsserted, 60 NumberOfCheckSat, 2344 ConstructedInterpolants, 129 QuantifiedInterpolants, 55343 SizeOfPredicates, 373 NumberOfNonLiveVariables, 5196 ConjunctsInSsa, 1068 ConjunctsInUnsatCore, 59 InterpolantComputations, 27 PerfectInterpolantSequences, 198/462 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 proved your program to be incorrect! [2021-10-13 01:38:23,331 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-13 01:38:23,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e33352-889c-4f37-bca6-2fb46fad3435/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...