./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg --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 45a8f33f173b19ce98ca13bb7c3a70605cebce85501309e729b51c966620adf7 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Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:39:30,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:39:30,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:39:30,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:39:30,908 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:39:30,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:39:30,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:39:30,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:39:30,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:39:30,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:39:30,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:39:30,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:39:30,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:39:30,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:39:30,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:39:30,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:39:30,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:39:30,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:39:30,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:39:30,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:39:30,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:39:30,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:39:30,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:39:30,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:39:30,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:39:30,979 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:39:30,979 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:39:30,982 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:39:30,982 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:39:30,984 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:39:30,984 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:39:30,985 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:39:30,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:39:30,989 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:39:30,991 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:39:30,991 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:39:30,992 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:39:30,992 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:39:30,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:39:30,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:39:30,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:39:30,996 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 09:39:31,040 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:39:31,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:39:31,041 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:39:31,042 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:39:31,050 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:39:31,050 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:39:31,050 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:39:31,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:39:31,051 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:39:31,051 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:39:31,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:39:31,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:39:31,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:39:31,053 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 09:39:31,053 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 09:39:31,054 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 09:39:31,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:39:31,054 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 09:39:31,054 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:39:31,055 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:39:31,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:39:31,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:39:31,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:39:31,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:39:31,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:39:31,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:39:31,056 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:39:31,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:39:31,057 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:39:31,058 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_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45a8f33f173b19ce98ca13bb7c3a70605cebce85501309e729b51c966620adf7 [2021-10-28 09:39:31,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:39:31,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:39:31,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:39:31,380 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:39:31,381 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:39:31,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i [2021-10-28 09:39:31,464 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/data/22d36964f/fef93c4d74c044678021d0cbee6468f1/FLAG404878e5c [2021-10-28 09:39:32,137 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:39:32,138 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i [2021-10-28 09:39:32,167 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/data/22d36964f/fef93c4d74c044678021d0cbee6468f1/FLAG404878e5c [2021-10-28 09:39:32,389 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/data/22d36964f/fef93c4d74c044678021d0cbee6468f1 [2021-10-28 09:39:32,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:39:32,394 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 09:39:32,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:39:32,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:39:32,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:39:32,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:39:32" (1/1) ... [2021-10-28 09:39:32,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16a074a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:39:32, skipping insertion in model container [2021-10-28 09:39:32,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:39:32" (1/1) ... [2021-10-28 09:39:32,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:39:32,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:39:32,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:39:32,795 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:39:32,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:39:32,865 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:39:32,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:39:32 WrapperNode [2021-10-28 09:39:32,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:39:32,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:39:32,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:39:32,870 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:39:32,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:39:32" (1/1) ... [2021-10-28 09:39:32,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:39:32" (1/1) ... [2021-10-28 09:39:32,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:39:32" (1/1) ... [2021-10-28 09:39:32,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:39:32" (1/1) ... [2021-10-28 09:39:32,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:39:32" (1/1) ... [2021-10-28 09:39:32,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:39:32" (1/1) ... [2021-10-28 09:39:32,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:39:32" (1/1) ... [2021-10-28 09:39:32,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:39:32,985 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:39:32,985 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:39:32,985 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:39:32,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:39:32" (1/1) ... [2021-10-28 09:39:32,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:39:33,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:39:33,023 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:39:33,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:39:33,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 09:39:33,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:39:33,081 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 09:39:33,081 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 09:39:33,082 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 09:39:33,083 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 09:39:33,083 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 09:39:33,084 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrspn [2021-10-28 09:39:33,084 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 09:39:33,085 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 09:39:33,085 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 09:39:33,086 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 09:39:33,086 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 09:39:33,086 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 09:39:33,086 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 09:39:33,086 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 09:39:33,087 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 09:39:33,087 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 09:39:33,087 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 09:39:33,087 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 09:39:33,087 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 09:39:33,087 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 09:39:33,088 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 09:39:33,088 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 09:39:33,088 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 09:39:33,088 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 09:39:33,088 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 09:39:33,088 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 09:39:33,089 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 09:39:33,089 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 09:39:33,089 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 09:39:33,089 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 09:39:33,089 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 09:39:33,089 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 09:39:33,089 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 09:39:33,090 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 09:39:33,090 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 09:39:33,090 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 09:39:33,090 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 09:39:33,090 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 09:39:33,090 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 09:39:33,091 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 09:39:33,091 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 09:39:33,091 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 09:39:33,091 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 09:39:33,091 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 09:39:33,091 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 09:39:33,091 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 09:39:33,092 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 09:39:33,092 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 09:39:33,092 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 09:39:33,092 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 09:39:33,093 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 09:39:33,093 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 09:39:33,094 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 09:39:33,094 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 09:39:33,094 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 09:39:33,094 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 09:39:33,094 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 09:39:33,095 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 09:39:33,095 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 09:39:33,095 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 09:39:33,095 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 09:39:33,095 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 09:39:33,096 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 09:39:33,096 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 09:39:33,096 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 09:39:33,096 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 09:39:33,097 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 09:39:33,098 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 09:39:33,098 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 09:39:33,099 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 09:39:33,099 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 09:39:33,099 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 09:39:33,099 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 09:39:33,099 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 09:39:33,099 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 09:39:33,100 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 09:39:33,100 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 09:39:33,100 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 09:39:33,100 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 09:39:33,100 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 09:39:33,100 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 09:39:33,101 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 09:39:33,101 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 09:39:33,101 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 09:39:33,102 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 09:39:33,102 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 09:39:33,102 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 09:39:33,102 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 09:39:33,102 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 09:39:33,102 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 09:39:33,103 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 09:39:33,103 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 09:39:33,103 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 09:39:33,103 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 09:39:33,103 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 09:39:33,103 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 09:39:33,103 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 09:39:33,104 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 09:39:33,104 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 09:39:33,104 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 09:39:33,104 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 09:39:33,104 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 09:39:33,104 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 09:39:33,105 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 09:39:33,105 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 09:39:33,105 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 09:39:33,105 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 09:39:33,105 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 09:39:33,106 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 09:39:33,106 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 09:39:33,106 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 09:39:33,107 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 09:39:33,107 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 09:39:33,107 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 09:39:33,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 09:39:33,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-28 09:39:33,107 INFO L130 BoogieDeclarations]: Found specification of procedure cstrspn [2021-10-28 09:39:33,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 09:39:33,108 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 09:39:33,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:39:33,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 09:39:33,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 09:39:33,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 09:39:33,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:39:33,662 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:39:33,663 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-28 09:39:33,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:39:33 BoogieIcfgContainer [2021-10-28 09:39:33,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:39:33,667 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:39:33,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:39:33,671 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:39:33,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:39:32" (1/3) ... [2021-10-28 09:39:33,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b938735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:39:33, skipping insertion in model container [2021-10-28 09:39:33,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:39:32" (2/3) ... [2021-10-28 09:39:33,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b938735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:39:33, skipping insertion in model container [2021-10-28 09:39:33,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:39:33" (3/3) ... [2021-10-28 09:39:33,674 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrspn-alloca-1.i [2021-10-28 09:39:33,680 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:39:33,680 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-10-28 09:39:33,725 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:39:33,732 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 09:39:33,732 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-10-28 09:39:33,748 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 55 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 09:39:33,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 09:39:33,755 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:33,755 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:33,756 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:33,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:33,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1274980559, now seen corresponding path program 1 times [2021-10-28 09:39:33,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:33,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859228960] [2021-10-28 09:39:33,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:33,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:34,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:34,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:39:34,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:34,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859228960] [2021-10-28 09:39:34,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859228960] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:39:34,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:39:34,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:39:34,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222899053] [2021-10-28 09:39:34,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:39:34,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:34,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:39:34,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:39:34,109 INFO L87 Difference]: Start difference. First operand has 62 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 55 states have internal predecessors, (67), 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 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:34,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:34,406 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2021-10-28 09:39:34,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:39:34,408 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-28 09:39:34,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:34,419 INFO L225 Difference]: With dead ends: 83 [2021-10-28 09:39:34,419 INFO L226 Difference]: Without dead ends: 79 [2021-10-28 09:39:34,422 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:39:34,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-28 09:39:34,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2021-10-28 09:39:34,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 56 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:39:34,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-10-28 09:39:34,473 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 11 [2021-10-28 09:39:34,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:34,474 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-10-28 09:39:34,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:34,474 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-10-28 09:39:34,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 09:39:34,475 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:34,476 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:34,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:39:34,476 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:34,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:34,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1276827601, now seen corresponding path program 1 times [2021-10-28 09:39:34,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:34,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962928763] [2021-10-28 09:39:34,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:34,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:34,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:39:34,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:34,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962928763] [2021-10-28 09:39:34,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962928763] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:39:34,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:39:34,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:39:34,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959720868] [2021-10-28 09:39:34,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:39:34,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:34,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:39:34,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:39:34,666 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:34,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:34,872 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2021-10-28 09:39:34,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:39:34,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-28 09:39:34,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:34,878 INFO L225 Difference]: With dead ends: 84 [2021-10-28 09:39:34,878 INFO L226 Difference]: Without dead ends: 84 [2021-10-28 09:39:34,879 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:39:34,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-28 09:39:34,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 64. [2021-10-28 09:39:34,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.725) internal successors, (69), 58 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:39:34,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-10-28 09:39:34,899 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 11 [2021-10-28 09:39:34,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:34,899 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-10-28 09:39:34,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:34,900 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-10-28 09:39:34,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 09:39:34,901 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:34,901 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:34,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 09:39:34,901 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:34,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:34,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1276827600, now seen corresponding path program 1 times [2021-10-28 09:39:34,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:34,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449893109] [2021-10-28 09:39:34,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:34,903 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:34,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:34,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:39:34,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:34,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449893109] [2021-10-28 09:39:34,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449893109] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:39:34,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:39:34,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:39:34,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521859908] [2021-10-28 09:39:34,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:39:34,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:34,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:39:34,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:39:34,978 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:35,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:35,081 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-10-28 09:39:35,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:39:35,081 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-28 09:39:35,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:35,082 INFO L225 Difference]: With dead ends: 62 [2021-10-28 09:39:35,082 INFO L226 Difference]: Without dead ends: 62 [2021-10-28 09:39:35,083 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:39:35,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-28 09:39:35,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-28 09:39:35,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.65) internal successors, (66), 56 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:39:35,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-10-28 09:39:35,089 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 11 [2021-10-28 09:39:35,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:35,089 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-10-28 09:39:35,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:35,089 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-10-28 09:39:35,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 09:39:35,090 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:35,090 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:35,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 09:39:35,091 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:35,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:35,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1190586438, now seen corresponding path program 1 times [2021-10-28 09:39:35,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:35,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55974229] [2021-10-28 09:39:35,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:35,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:35,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:35,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:39:35,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:35,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55974229] [2021-10-28 09:39:35,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55974229] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:39:35,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:39:35,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:39:35,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76361578] [2021-10-28 09:39:35,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:39:35,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:35,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:39:35,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:39:35,231 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:35,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:35,360 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-10-28 09:39:35,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:39:35,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 13 [2021-10-28 09:39:35,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:35,363 INFO L225 Difference]: With dead ends: 61 [2021-10-28 09:39:35,363 INFO L226 Difference]: Without dead ends: 61 [2021-10-28 09:39:35,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:39:35,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-28 09:39:35,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-10-28 09:39:35,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.625) internal successors, (65), 55 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:39:35,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-10-28 09:39:35,383 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 13 [2021-10-28 09:39:35,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:35,384 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-10-28 09:39:35,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:35,384 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-10-28 09:39:35,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 09:39:35,385 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:35,385 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:35,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 09:39:35,387 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:35,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:35,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1190586490, now seen corresponding path program 1 times [2021-10-28 09:39:35,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:35,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747307877] [2021-10-28 09:39:35,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:35,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:35,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:35,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:39:35,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:35,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747307877] [2021-10-28 09:39:35,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747307877] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:39:35,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:39:35,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:39:35,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078863376] [2021-10-28 09:39:35,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:39:35,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:35,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:39:35,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:39:35,481 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:35,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:35,634 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-10-28 09:39:35,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:39:35,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 13 [2021-10-28 09:39:35,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:35,638 INFO L225 Difference]: With dead ends: 81 [2021-10-28 09:39:35,639 INFO L226 Difference]: Without dead ends: 81 [2021-10-28 09:39:35,639 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:39:35,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-28 09:39:35,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-10-28 09:39:35,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 66 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:39:35,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2021-10-28 09:39:35,657 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 13 [2021-10-28 09:39:35,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:35,660 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2021-10-28 09:39:35,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:35,660 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2021-10-28 09:39:35,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 09:39:35,661 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:35,661 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:35,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 09:39:35,661 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:35,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:35,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1247844792, now seen corresponding path program 1 times [2021-10-28 09:39:35,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:35,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408003615] [2021-10-28 09:39:35,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:35,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:35,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:35,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:39:35,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:35,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408003615] [2021-10-28 09:39:35,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408003615] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:39:35,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:39:35,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:39:35,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226173215] [2021-10-28 09:39:35,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:39:35,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:35,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:39:35,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:39:35,733 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:35,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:35,842 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-10-28 09:39:35,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:39:35,843 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 13 [2021-10-28 09:39:35,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:35,845 INFO L225 Difference]: With dead ends: 70 [2021-10-28 09:39:35,845 INFO L226 Difference]: Without dead ends: 70 [2021-10-28 09:39:35,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:39:35,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-28 09:39:35,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-10-28 09:39:35,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 64 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:39:35,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2021-10-28 09:39:35,861 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 13 [2021-10-28 09:39:35,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:35,861 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2021-10-28 09:39:35,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:35,862 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2021-10-28 09:39:35,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 09:39:35,863 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:35,864 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:35,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 09:39:35,865 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:35,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:35,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1247844793, now seen corresponding path program 1 times [2021-10-28 09:39:35,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:35,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765509804] [2021-10-28 09:39:35,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:35,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:35,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:35,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:39:35,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:35,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765509804] [2021-10-28 09:39:35,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765509804] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:39:35,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:39:35,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:39:35,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134853091] [2021-10-28 09:39:35,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:39:35,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:35,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:39:35,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:39:35,998 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:36,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:36,176 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-10-28 09:39:36,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:39:36,177 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 13 [2021-10-28 09:39:36,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:36,178 INFO L225 Difference]: With dead ends: 81 [2021-10-28 09:39:36,179 INFO L226 Difference]: Without dead ends: 81 [2021-10-28 09:39:36,179 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:39:36,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-28 09:39:36,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-10-28 09:39:36,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.509433962264151) internal successors, (80), 66 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:39:36,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2021-10-28 09:39:36,186 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 13 [2021-10-28 09:39:36,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:36,186 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2021-10-28 09:39:36,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:36,186 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2021-10-28 09:39:36,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 09:39:36,187 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:36,187 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:36,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 09:39:36,188 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:36,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:36,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1746526086, now seen corresponding path program 1 times [2021-10-28 09:39:36,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:36,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874029304] [2021-10-28 09:39:36,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:36,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:36,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:36,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:39:36,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:36,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874029304] [2021-10-28 09:39:36,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874029304] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:39:36,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:39:36,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:39:36,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040064340] [2021-10-28 09:39:36,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:39:36,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:36,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:39:36,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:39:36,273 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:36,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:36,371 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2021-10-28 09:39:36,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:39:36,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 14 [2021-10-28 09:39:36,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:36,372 INFO L225 Difference]: With dead ends: 71 [2021-10-28 09:39:36,372 INFO L226 Difference]: Without dead ends: 71 [2021-10-28 09:39:36,373 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:39:36,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-28 09:39:36,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-10-28 09:39:36,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.490566037735849) internal successors, (79), 65 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:39:36,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2021-10-28 09:39:36,376 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 14 [2021-10-28 09:39:36,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:36,377 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2021-10-28 09:39:36,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:36,377 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2021-10-28 09:39:36,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 09:39:36,378 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:36,378 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:36,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 09:39:36,378 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:36,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:36,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1874075756, now seen corresponding path program 1 times [2021-10-28 09:39:36,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:36,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620562426] [2021-10-28 09:39:36,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:36,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:36,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:39:36,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:36,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620562426] [2021-10-28 09:39:36,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620562426] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:39:36,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690969050] [2021-10-28 09:39:36,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:36,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:39:36,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:39:36,479 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:39:36,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:39:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:36,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 09:39:36,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:39:36,736 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 09:39:36,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 09:39:36,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-10-28 09:39:36,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:39:36,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690969050] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:39:36,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:39:36,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-28 09:39:36,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659380589] [2021-10-28 09:39:36,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:39:36,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:36,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:39:36,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:39:36,872 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:37,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:37,067 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2021-10-28 09:39:37,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:39:37,067 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-28 09:39:37,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:37,068 INFO L225 Difference]: With dead ends: 90 [2021-10-28 09:39:37,068 INFO L226 Difference]: Without dead ends: 90 [2021-10-28 09:39:37,069 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:39:37,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-28 09:39:37,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 66. [2021-10-28 09:39:37,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 60 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:39:37,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-10-28 09:39:37,072 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 15 [2021-10-28 09:39:37,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:37,072 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-10-28 09:39:37,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:37,072 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-10-28 09:39:37,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:39:37,093 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:37,094 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:37,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-28 09:39:37,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:39:37,295 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting cstrspnErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:37,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:37,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1524736657, now seen corresponding path program 1 times [2021-10-28 09:39:37,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:37,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957631581] [2021-10-28 09:39:37,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:37,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:37,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:37,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:37,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:39:37,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:37,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957631581] [2021-10-28 09:39:37,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957631581] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:39:37,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:39:37,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:39:37,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004630092] [2021-10-28 09:39:37,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:39:37,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:37,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:39:37,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:39:37,367 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:37,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:37,484 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-10-28 09:39:37,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:39:37,485 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 17 [2021-10-28 09:39:37,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:37,485 INFO L225 Difference]: With dead ends: 64 [2021-10-28 09:39:37,485 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 09:39:37,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:39:37,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 09:39:37,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-28 09:39:37,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 58 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:39:37,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-10-28 09:39:37,489 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 17 [2021-10-28 09:39:37,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:37,491 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-10-28 09:39:37,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:37,491 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-10-28 09:39:37,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:39:37,493 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:37,493 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:37,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 09:39:37,494 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:37,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:37,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1524736656, now seen corresponding path program 1 times [2021-10-28 09:39:37,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:37,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624984023] [2021-10-28 09:39:37,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:37,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:37,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:39:37,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:37,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624984023] [2021-10-28 09:39:37,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624984023] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:39:37,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:39:37,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 09:39:37,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274819179] [2021-10-28 09:39:37,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:39:37,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:37,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:39:37,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:39:37,607 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:37,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:37,833 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2021-10-28 09:39:37,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:39:37,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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 17 [2021-10-28 09:39:37,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:37,837 INFO L225 Difference]: With dead ends: 86 [2021-10-28 09:39:37,837 INFO L226 Difference]: Without dead ends: 86 [2021-10-28 09:39:37,838 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:39:37,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-28 09:39:37,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 67. [2021-10-28 09:39:37,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 61 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:39:37,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-10-28 09:39:37,841 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 17 [2021-10-28 09:39:37,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:37,842 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-10-28 09:39:37,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:37,842 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-10-28 09:39:37,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:39:37,844 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:37,845 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:37,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 09:39:37,845 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:37,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:37,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1869159940, now seen corresponding path program 1 times [2021-10-28 09:39:37,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:37,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318452310] [2021-10-28 09:39:37,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:37,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:37,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:37,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:37,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:39:37,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:37,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318452310] [2021-10-28 09:39:37,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318452310] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:39:37,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993557411] [2021-10-28 09:39:37,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:37,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:39:37,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:39:37,966 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:39:37,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:39:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:38,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:39:38,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:39:38,142 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:39:38,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:39:38,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:39:38,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993557411] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:39:38,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:39:38,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-10-28 09:39:38,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863532508] [2021-10-28 09:39:38,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:39:38,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:38,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:39:38,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:39:38,247 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:38,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:38,409 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2021-10-28 09:39:38,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:39:38,409 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 17 [2021-10-28 09:39:38,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:38,410 INFO L225 Difference]: With dead ends: 74 [2021-10-28 09:39:38,410 INFO L226 Difference]: Without dead ends: 74 [2021-10-28 09:39:38,410 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:39:38,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-28 09:39:38,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2021-10-28 09:39:38,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.38) internal successors, (69), 58 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:39:38,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-10-28 09:39:38,413 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 17 [2021-10-28 09:39:38,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:38,413 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-10-28 09:39:38,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:38,414 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-10-28 09:39:38,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:39:38,414 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:38,414 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:38,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:39:38,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:39:38,630 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrspnErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:38,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:38,630 INFO L85 PathProgramCache]: Analyzing trace with hash 182222645, now seen corresponding path program 1 times [2021-10-28 09:39:38,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:38,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607144206] [2021-10-28 09:39:38,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:38,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:38,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:39:38,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:38,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607144206] [2021-10-28 09:39:38,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607144206] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:39:38,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:39:38,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:39:38,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053552715] [2021-10-28 09:39:38,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:39:38,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:38,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:39:38,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:39:38,684 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:38,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:38,823 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-10-28 09:39:38,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:39:38,824 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 21 [2021-10-28 09:39:38,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:38,825 INFO L225 Difference]: With dead ends: 64 [2021-10-28 09:39:38,825 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 09:39:38,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:39:38,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 09:39:38,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-10-28 09:39:38,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 50 states have (on average 1.32) internal successors, (66), 55 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:39:38,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-10-28 09:39:38,828 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 21 [2021-10-28 09:39:38,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:38,828 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-10-28 09:39:38,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:38,829 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-10-28 09:39:38,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:39:38,829 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:38,829 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:38,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 09:39:38,830 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:38,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:38,830 INFO L85 PathProgramCache]: Analyzing trace with hash 182222646, now seen corresponding path program 1 times [2021-10-28 09:39:38,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:38,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128213778] [2021-10-28 09:39:38,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:38,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:38,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:39:38,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:38,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128213778] [2021-10-28 09:39:38,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128213778] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:39:38,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:39:38,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 09:39:38,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840315237] [2021-10-28 09:39:38,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:39:38,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:38,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:39:38,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:39:38,923 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:39,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:39,181 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2021-10-28 09:39:39,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:39:39,183 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 21 [2021-10-28 09:39:39,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:39,183 INFO L225 Difference]: With dead ends: 76 [2021-10-28 09:39:39,183 INFO L226 Difference]: Without dead ends: 76 [2021-10-28 09:39:39,184 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:39:39,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-28 09:39:39,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2021-10-28 09:39:39,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 62 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:39:39,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2021-10-28 09:39:39,185 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 21 [2021-10-28 09:39:39,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:39,186 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2021-10-28 09:39:39,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:39,186 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2021-10-28 09:39:39,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 09:39:39,187 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:39,187 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:39,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 09:39:39,187 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:39,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:39,188 INFO L85 PathProgramCache]: Analyzing trace with hash -994936542, now seen corresponding path program 1 times [2021-10-28 09:39:39,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:39,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531357740] [2021-10-28 09:39:39,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:39,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:39,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:39,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:39,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 09:39:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:39:39,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:39,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531357740] [2021-10-28 09:39:39,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531357740] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:39:39,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:39:39,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:39:39,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497115231] [2021-10-28 09:39:39,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:39:39,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:39,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:39:39,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:39:39,256 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:39:39,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:39,314 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2021-10-28 09:39:39,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:39:39,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 23 [2021-10-28 09:39:39,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:39,316 INFO L225 Difference]: With dead ends: 67 [2021-10-28 09:39:39,316 INFO L226 Difference]: Without dead ends: 62 [2021-10-28 09:39:39,316 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:39:39,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-28 09:39:39,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-28 09:39:39,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 57 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:39,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-10-28 09:39:39,318 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 23 [2021-10-28 09:39:39,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:39,319 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-10-28 09:39:39,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:39:39,319 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-10-28 09:39:39,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-28 09:39:39,320 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:39,320 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:39,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-28 09:39:39,320 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:39,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:39,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1032720461, now seen corresponding path program 1 times [2021-10-28 09:39:39,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:39,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759990530] [2021-10-28 09:39:39,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:39,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:39,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:39:39,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:39,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759990530] [2021-10-28 09:39:39,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759990530] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:39:39,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:39:39,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:39:39,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570824762] [2021-10-28 09:39:39,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:39:39,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:39,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:39:39,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:39:39,352 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:39,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:39,405 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-10-28 09:39:39,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:39:39,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 25 [2021-10-28 09:39:39,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:39,410 INFO L225 Difference]: With dead ends: 64 [2021-10-28 09:39:39,410 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 09:39:39,410 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:39:39,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 09:39:39,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-28 09:39:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 59 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:39,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-10-28 09:39:39,413 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 25 [2021-10-28 09:39:39,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:39,413 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-10-28 09:39:39,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:39,413 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-10-28 09:39:39,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 09:39:39,414 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:39,414 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:39,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-28 09:39:39,414 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:39,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:39,415 INFO L85 PathProgramCache]: Analyzing trace with hash 301059978, now seen corresponding path program 1 times [2021-10-28 09:39:39,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:39,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919910314] [2021-10-28 09:39:39,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:39,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:39,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:39,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:39:39,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:39,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919910314] [2021-10-28 09:39:39,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919910314] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:39:39,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:39:39,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 09:39:39,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105083663] [2021-10-28 09:39:39,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:39:39,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:39,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:39:39,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:39:39,558 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:39,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:39,798 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2021-10-28 09:39:39,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:39:39,799 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 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 27 [2021-10-28 09:39:39,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:39,799 INFO L225 Difference]: With dead ends: 77 [2021-10-28 09:39:39,799 INFO L226 Difference]: Without dead ends: 59 [2021-10-28 09:39:39,800 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:39:39,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-28 09:39:39,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-10-28 09:39:39,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.26) internal successors, (63), 54 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:39,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2021-10-28 09:39:39,802 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 27 [2021-10-28 09:39:39,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:39,802 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2021-10-28 09:39:39,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:39,803 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2021-10-28 09:39:39,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 09:39:39,803 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:39,803 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:39,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-28 09:39:39,803 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:39,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:39,804 INFO L85 PathProgramCache]: Analyzing trace with hash 723761804, now seen corresponding path program 1 times [2021-10-28 09:39:39,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:39,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222074305] [2021-10-28 09:39:39,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:39,804 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:39,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:39:39,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:39,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222074305] [2021-10-28 09:39:39,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222074305] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:39:39,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:39:39,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 09:39:39,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624163055] [2021-10-28 09:39:39,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:39:39,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:39,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:39:39,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:39:39,970 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:40,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:40,201 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-10-28 09:39:40,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:39:40,201 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 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 27 [2021-10-28 09:39:40,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:40,202 INFO L225 Difference]: With dead ends: 80 [2021-10-28 09:39:40,202 INFO L226 Difference]: Without dead ends: 67 [2021-10-28 09:39:40,202 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:39:40,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-28 09:39:40,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-10-28 09:39:40,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.25) internal successors, (65), 56 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:40,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2021-10-28 09:39:40,205 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 27 [2021-10-28 09:39:40,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:40,205 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2021-10-28 09:39:40,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:40,205 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2021-10-28 09:39:40,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 09:39:40,206 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:40,206 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:40,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-28 09:39:40,206 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:40,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:40,207 INFO L85 PathProgramCache]: Analyzing trace with hash 63626319, now seen corresponding path program 1 times [2021-10-28 09:39:40,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:40,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335062304] [2021-10-28 09:39:40,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:40,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:40,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:39:40,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:40,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335062304] [2021-10-28 09:39:40,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335062304] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:39:40,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:39:40,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 09:39:40,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26431739] [2021-10-28 09:39:40,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:39:40,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:40,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:39:40,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:39:40,332 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:40,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:40,621 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2021-10-28 09:39:40,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:39:40,622 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 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 31 [2021-10-28 09:39:40,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:40,622 INFO L225 Difference]: With dead ends: 81 [2021-10-28 09:39:40,623 INFO L226 Difference]: Without dead ends: 81 [2021-10-28 09:39:40,623 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:39:40,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-28 09:39:40,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-10-28 09:39:40,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 73 states have internal predecessors, (84), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:40,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2021-10-28 09:39:40,626 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 31 [2021-10-28 09:39:40,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:40,626 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2021-10-28 09:39:40,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:40,626 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2021-10-28 09:39:40,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 09:39:40,627 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:40,627 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:40,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-28 09:39:40,627 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:40,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:40,628 INFO L85 PathProgramCache]: Analyzing trace with hash -70387187, now seen corresponding path program 1 times [2021-10-28 09:39:40,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:40,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552107221] [2021-10-28 09:39:40,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:40,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:40,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:39:40,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:40,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552107221] [2021-10-28 09:39:40,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552107221] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:39:40,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:39:40,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-28 09:39:40,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616850262] [2021-10-28 09:39:40,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 09:39:40,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:40,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:39:40,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:39:40,813 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:41,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:41,124 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2021-10-28 09:39:41,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 09:39:41,125 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 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 31 [2021-10-28 09:39:41,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:41,126 INFO L225 Difference]: With dead ends: 103 [2021-10-28 09:39:41,126 INFO L226 Difference]: Without dead ends: 103 [2021-10-28 09:39:41,126 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-10-28 09:39:41,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-28 09:39:41,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2021-10-28 09:39:41,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 74 states have internal predecessors, (86), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:41,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-10-28 09:39:41,131 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 31 [2021-10-28 09:39:41,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:41,131 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-10-28 09:39:41,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:41,131 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-10-28 09:39:41,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 09:39:41,132 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:41,133 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:41,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-28 09:39:41,133 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:41,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:41,134 INFO L85 PathProgramCache]: Analyzing trace with hash -2142096765, now seen corresponding path program 1 times [2021-10-28 09:39:41,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:41,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646786717] [2021-10-28 09:39:41,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:41,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:41,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:41,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:39:41,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:41,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646786717] [2021-10-28 09:39:41,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646786717] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:39:41,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:39:41,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 09:39:41,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768956020] [2021-10-28 09:39:41,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:39:41,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:41,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:39:41,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:39:41,261 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:41,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:41,563 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-10-28 09:39:41,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 09:39:41,564 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 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 32 [2021-10-28 09:39:41,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:41,565 INFO L225 Difference]: With dead ends: 81 [2021-10-28 09:39:41,565 INFO L226 Difference]: Without dead ends: 56 [2021-10-28 09:39:41,566 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-10-28 09:39:41,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-28 09:39:41,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-10-28 09:39:41,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 49 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:41,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-10-28 09:39:41,568 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 32 [2021-10-28 09:39:41,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:41,568 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-10-28 09:39:41,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:41,568 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-10-28 09:39:41,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 09:39:41,569 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:41,569 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:41,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-28 09:39:41,569 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:41,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:41,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1176807056, now seen corresponding path program 1 times [2021-10-28 09:39:41,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:41,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553603237] [2021-10-28 09:39:41,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:41,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:41,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:39:41,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:41,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553603237] [2021-10-28 09:39:41,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553603237] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:39:41,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074011722] [2021-10-28 09:39:41,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:41,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:39:41,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:39:41,732 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:39:41,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:39:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:41,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 09:39:41,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:39:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:39:42,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074011722] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:39:42,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:39:42,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-10-28 09:39:42,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253998307] [2021-10-28 09:39:42,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 09:39:42,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:42,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 09:39:42,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:39:42,152 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 19 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:42,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:42,503 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2021-10-28 09:39:42,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:39:42,504 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-10-28 09:39:42,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:42,504 INFO L225 Difference]: With dead ends: 76 [2021-10-28 09:39:42,505 INFO L226 Difference]: Without dead ends: 74 [2021-10-28 09:39:42,505 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-10-28 09:39:42,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-28 09:39:42,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2021-10-28 09:39:42,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 55 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:42,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-10-28 09:39:42,507 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 35 [2021-10-28 09:39:42,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:42,508 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-10-28 09:39:42,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:42,508 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-10-28 09:39:42,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 09:39:42,508 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:42,508 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:42,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:39:42,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:39:42,718 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:42,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:42,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1560164987, now seen corresponding path program 1 times [2021-10-28 09:39:42,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:42,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892580046] [2021-10-28 09:39:42,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:42,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:42,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:39:42,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:42,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892580046] [2021-10-28 09:39:42,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892580046] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:39:42,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769917758] [2021-10-28 09:39:42,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:42,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:39:42,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:39:42,850 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:39:42,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 09:39:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:43,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 09:39:43,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:39:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:39:43,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769917758] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:39:43,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:39:43,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-28 09:39:43,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619270889] [2021-10-28 09:39:43,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 09:39:43,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:43,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 09:39:43,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:39:43,323 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 16 states, 15 states have (on average 4.2) internal successors, (63), 13 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:43,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:43,698 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2021-10-28 09:39:43,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:39:43,702 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.2) internal successors, (63), 13 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-10-28 09:39:43,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:43,703 INFO L225 Difference]: With dead ends: 122 [2021-10-28 09:39:43,703 INFO L226 Difference]: Without dead ends: 122 [2021-10-28 09:39:43,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-10-28 09:39:43,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-28 09:39:43,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 86. [2021-10-28 09:39:43,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 77 states have (on average 1.2337662337662338) internal successors, (95), 81 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:43,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2021-10-28 09:39:43,706 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 38 [2021-10-28 09:39:43,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:43,706 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2021-10-28 09:39:43,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.2) internal successors, (63), 13 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:43,706 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2021-10-28 09:39:43,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-28 09:39:43,707 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:43,707 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:43,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:39:43,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 09:39:43,907 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:43,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:43,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1664191332, now seen corresponding path program 2 times [2021-10-28 09:39:43,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:43,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271291155] [2021-10-28 09:39:43,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:43,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:43,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:44,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:44,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:39:44,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:44,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271291155] [2021-10-28 09:39:44,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271291155] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:39:44,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803094622] [2021-10-28 09:39:44,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:39:44,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:39:44,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:39:44,224 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:39:44,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 09:39:44,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:39:44,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:39:44,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 09:39:44,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:39:44,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:39:44,971 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-10-28 09:39:44,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2021-10-28 09:39:45,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:39:45,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803094622] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:39:45,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:39:45,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-10-28 09:39:45,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765133589] [2021-10-28 09:39:45,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 09:39:45,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:45,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 09:39:45,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-10-28 09:39:45,028 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 26 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:45,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:45,753 INFO L93 Difference]: Finished difference Result 134 states and 148 transitions. [2021-10-28 09:39:45,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 09:39:45,753 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-10-28 09:39:45,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:45,754 INFO L225 Difference]: With dead ends: 134 [2021-10-28 09:39:45,755 INFO L226 Difference]: Without dead ends: 128 [2021-10-28 09:39:45,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 09:39:45,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-28 09:39:45,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2021-10-28 09:39:45,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 117 states have internal predecessors, (134), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:45,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 139 transitions. [2021-10-28 09:39:45,759 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 139 transitions. Word has length 41 [2021-10-28 09:39:45,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:45,759 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 139 transitions. [2021-10-28 09:39:45,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:45,760 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 139 transitions. [2021-10-28 09:39:45,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 09:39:45,760 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:45,760 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 09:39:45,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:39:45,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 09:39:45,961 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:45,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:45,961 INFO L85 PathProgramCache]: Analyzing trace with hash 321433639, now seen corresponding path program 3 times [2021-10-28 09:39:45,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:45,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933053888] [2021-10-28 09:39:45,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:45,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:46,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:39:46,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:46,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933053888] [2021-10-28 09:39:46,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933053888] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:39:46,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817046136] [2021-10-28 09:39:46,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:39:46,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:39:46,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:39:46,138 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:39:46,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 09:39:46,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 09:39:46,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:39:46,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 09:39:46,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:39:46,604 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:39:46,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817046136] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:39:46,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:39:46,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-10-28 09:39:46,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013944498] [2021-10-28 09:39:46,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 09:39:46,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:46,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 09:39:46,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-10-28 09:39:46,607 INFO L87 Difference]: Start difference. First operand 123 states and 139 transitions. Second operand has 23 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:47,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:47,195 INFO L93 Difference]: Finished difference Result 170 states and 187 transitions. [2021-10-28 09:39:47,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:39:47,195 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-10-28 09:39:47,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:47,197 INFO L225 Difference]: With dead ends: 170 [2021-10-28 09:39:47,197 INFO L226 Difference]: Without dead ends: 168 [2021-10-28 09:39:47,198 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-10-28 09:39:47,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-10-28 09:39:47,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 135. [2021-10-28 09:39:47,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 125 states have (on average 1.184) internal successors, (148), 129 states have internal predecessors, (148), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:47,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 153 transitions. [2021-10-28 09:39:47,203 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 153 transitions. Word has length 45 [2021-10-28 09:39:47,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:47,203 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 153 transitions. [2021-10-28 09:39:47,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:47,203 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 153 transitions. [2021-10-28 09:39:47,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 09:39:47,204 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:47,204 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:47,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 09:39:47,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:39:47,418 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:47,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:47,418 INFO L85 PathProgramCache]: Analyzing trace with hash -959683498, now seen corresponding path program 2 times [2021-10-28 09:39:47,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:47,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162713629] [2021-10-28 09:39:47,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:47,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:47,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:39:47,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:47,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162713629] [2021-10-28 09:39:47,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162713629] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:39:47,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011602770] [2021-10-28 09:39:47,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:39:47,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:39:47,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:39:47,746 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:39:47,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 09:39:47,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:39:47,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:39:47,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-28 09:39:47,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:39:47,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 09:39:48,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:39:48,226 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-28 09:39:48,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-28 09:39:48,925 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-28 09:39:48,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-10-28 09:39:48,975 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:39:48,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011602770] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:39:48,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:39:48,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-10-28 09:39:48,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61214646] [2021-10-28 09:39:48,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 09:39:48,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:48,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 09:39:48,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-10-28 09:39:48,977 INFO L87 Difference]: Start difference. First operand 135 states and 153 transitions. Second operand has 22 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 19 states have internal predecessors, (78), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:49,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:49,868 INFO L93 Difference]: Finished difference Result 214 states and 238 transitions. [2021-10-28 09:39:49,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:39:49,869 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 19 states have internal predecessors, (78), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-10-28 09:39:49,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:49,870 INFO L225 Difference]: With dead ends: 214 [2021-10-28 09:39:49,870 INFO L226 Difference]: Without dead ends: 190 [2021-10-28 09:39:49,871 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-10-28 09:39:49,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-10-28 09:39:49,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 181. [2021-10-28 09:39:49,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 170 states have (on average 1.1705882352941177) internal successors, (199), 174 states have internal predecessors, (199), 5 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:49,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 205 transitions. [2021-10-28 09:39:49,877 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 205 transitions. Word has length 51 [2021-10-28 09:39:49,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:49,877 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 205 transitions. [2021-10-28 09:39:49,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 19 states have internal predecessors, (78), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:49,878 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 205 transitions. [2021-10-28 09:39:49,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 09:39:49,879 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:49,879 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:49,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 09:39:50,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:39:50,090 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:50,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:50,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1458059333, now seen corresponding path program 4 times [2021-10-28 09:39:50,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:50,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467933095] [2021-10-28 09:39:50,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:50,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:50,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:39:50,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:50,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467933095] [2021-10-28 09:39:50,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467933095] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:39:50,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528668329] [2021-10-28 09:39:50,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:39:50,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:39:50,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:39:50,461 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:39:50,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 09:39:50,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:39:50,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:39:50,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 09:39:50,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:39:50,790 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:39:50,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:39:51,084 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 15 treesize of output 11 [2021-10-28 09:39:51,476 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-10-28 09:39:51,477 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 34 treesize of output 25 [2021-10-28 09:39:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:39:51,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528668329] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:39:51,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:39:51,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 32 [2021-10-28 09:39:51,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548049637] [2021-10-28 09:39:51,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 09:39:51,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:51,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 09:39:51,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-10-28 09:39:51,498 INFO L87 Difference]: Start difference. First operand 181 states and 205 transitions. Second operand has 32 states, 30 states have (on average 2.8) internal successors, (84), 29 states have internal predecessors, (84), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:53,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:53,328 INFO L93 Difference]: Finished difference Result 284 states and 309 transitions. [2021-10-28 09:39:53,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-28 09:39:53,329 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.8) internal successors, (84), 29 states have internal predecessors, (84), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-10-28 09:39:53,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:53,331 INFO L225 Difference]: With dead ends: 284 [2021-10-28 09:39:53,331 INFO L226 Difference]: Without dead ends: 255 [2021-10-28 09:39:53,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=495, Invalid=3927, Unknown=0, NotChecked=0, Total=4422 [2021-10-28 09:39:53,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-10-28 09:39:53,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 234. [2021-10-28 09:39:53,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 222 states have (on average 1.1531531531531531) internal successors, (256), 226 states have internal predecessors, (256), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:53,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 263 transitions. [2021-10-28 09:39:53,349 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 263 transitions. Word has length 51 [2021-10-28 09:39:53,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:53,349 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 263 transitions. [2021-10-28 09:39:53,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.8) internal successors, (84), 29 states have internal predecessors, (84), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:53,350 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 263 transitions. [2021-10-28 09:39:53,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 09:39:53,350 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:53,351 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:53,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:39:53,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:39:53,551 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:53,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:53,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1549396802, now seen corresponding path program 5 times [2021-10-28 09:39:53,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:53,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256119811] [2021-10-28 09:39:53,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:53,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:53,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:39:53,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:53,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256119811] [2021-10-28 09:39:53,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256119811] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:39:53,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121975305] [2021-10-28 09:39:53,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:39:53,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:39:53,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:39:53,807 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:39:53,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 09:39:54,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-28 09:39:54,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:39:54,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-28 09:39:54,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:39:54,194 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:39:54,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:39:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:39:54,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121975305] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:39:54,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:39:54,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 18 [2021-10-28 09:39:54,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909047767] [2021-10-28 09:39:54,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 09:39:54,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:54,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 09:39:54,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:39:54,581 INFO L87 Difference]: Start difference. First operand 234 states and 263 transitions. Second operand has 19 states, 18 states have (on average 4.333333333333333) internal successors, (78), 17 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:55,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:55,119 INFO L93 Difference]: Finished difference Result 298 states and 330 transitions. [2021-10-28 09:39:55,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 09:39:55,119 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.333333333333333) internal successors, (78), 17 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-10-28 09:39:55,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:55,121 INFO L225 Difference]: With dead ends: 298 [2021-10-28 09:39:55,121 INFO L226 Difference]: Without dead ends: 296 [2021-10-28 09:39:55,122 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-10-28 09:39:55,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-10-28 09:39:55,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 252. [2021-10-28 09:39:55,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 240 states have (on average 1.15) internal successors, (276), 244 states have internal predecessors, (276), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:55,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 283 transitions. [2021-10-28 09:39:55,131 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 283 transitions. Word has length 55 [2021-10-28 09:39:55,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:55,131 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 283 transitions. [2021-10-28 09:39:55,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.333333333333333) internal successors, (78), 17 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:55,132 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 283 transitions. [2021-10-28 09:39:55,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 09:39:55,132 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:55,133 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:55,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:39:55,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:39:55,358 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:55,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:55,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1293443559, now seen corresponding path program 3 times [2021-10-28 09:39:55,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:55,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072963920] [2021-10-28 09:39:55,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:55,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:55,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:39:55,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:55,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072963920] [2021-10-28 09:39:55,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072963920] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:39:55,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477638839] [2021-10-28 09:39:55,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:39:55,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:39:55,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:39:55,516 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:39:55,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 09:39:55,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 09:39:55,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:39:55,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 09:39:55,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:39:56,145 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:39:56,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477638839] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:39:56,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:39:56,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-28 09:39:56,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375348133] [2021-10-28 09:39:56,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 09:39:56,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:56,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 09:39:56,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-10-28 09:39:56,147 INFO L87 Difference]: Start difference. First operand 252 states and 283 transitions. Second operand has 20 states, 19 states have (on average 5.157894736842105) internal successors, (98), 17 states have internal predecessors, (98), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:56,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:39:56,604 INFO L93 Difference]: Finished difference Result 403 states and 442 transitions. [2021-10-28 09:39:56,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:39:56,611 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.157894736842105) internal successors, (98), 17 states have internal predecessors, (98), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-10-28 09:39:56,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:39:56,613 INFO L225 Difference]: With dead ends: 403 [2021-10-28 09:39:56,613 INFO L226 Difference]: Without dead ends: 403 [2021-10-28 09:39:56,614 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-10-28 09:39:56,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-10-28 09:39:56,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 322. [2021-10-28 09:39:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 310 states have (on average 1.1483870967741936) internal successors, (356), 314 states have internal predecessors, (356), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:56,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 363 transitions. [2021-10-28 09:39:56,630 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 363 transitions. Word has length 55 [2021-10-28 09:39:56,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:39:56,631 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 363 transitions. [2021-10-28 09:39:56,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.157894736842105) internal successors, (98), 17 states have internal predecessors, (98), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:39:56,631 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 363 transitions. [2021-10-28 09:39:56,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 09:39:56,632 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:39:56,632 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:39:56,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 09:39:56,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 09:39:56,858 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:39:56,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:39:56,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1254563602, now seen corresponding path program 6 times [2021-10-28 09:39:56,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:39:56,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854215955] [2021-10-28 09:39:56,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:39:56,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:39:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:57,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:39:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:39:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:39:57,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:39:57,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854215955] [2021-10-28 09:39:57,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854215955] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:39:57,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216392957] [2021-10-28 09:39:57,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:39:57,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:39:57,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:39:57,174 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:39:57,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 09:39:57,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-28 09:39:57,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:39:57,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-28 09:39:57,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:39:57,550 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:39:57,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:39:57,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 09:39:58,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:39:58,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-10-28 09:39:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:39:58,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216392957] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:39:58,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:39:58,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-10-28 09:39:58,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554589489] [2021-10-28 09:39:58,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 09:39:58,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:39:58,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 09:39:58,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1096, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 09:39:58,851 INFO L87 Difference]: Start difference. First operand 322 states and 363 transitions. Second operand has 35 states, 33 states have (on average 3.242424242424242) internal successors, (107), 32 states have internal predecessors, (107), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:40:00,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:40:00,857 INFO L93 Difference]: Finished difference Result 508 states and 554 transitions. [2021-10-28 09:40:00,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 09:40:00,859 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 3.242424242424242) internal successors, (107), 32 states have internal predecessors, (107), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-10-28 09:40:00,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:40:00,861 INFO L225 Difference]: With dead ends: 508 [2021-10-28 09:40:00,861 INFO L226 Difference]: Without dead ends: 470 [2021-10-28 09:40:00,863 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=372, Invalid=3168, Unknown=0, NotChecked=0, Total=3540 [2021-10-28 09:40:00,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-10-28 09:40:00,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 412. [2021-10-28 09:40:00,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 399 states have (on average 1.137844611528822) internal successors, (454), 403 states have internal predecessors, (454), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:40:00,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 462 transitions. [2021-10-28 09:40:00,876 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 462 transitions. Word has length 61 [2021-10-28 09:40:00,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:40:00,876 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 462 transitions. [2021-10-28 09:40:00,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 3.242424242424242) internal successors, (107), 32 states have internal predecessors, (107), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:40:00,877 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 462 transitions. [2021-10-28 09:40:00,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-28 09:40:00,878 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:40:00,878 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:40:00,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 09:40:01,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:40:01,094 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:40:01,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:40:01,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1950827605, now seen corresponding path program 7 times [2021-10-28 09:40:01,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:40:01,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754948664] [2021-10-28 09:40:01,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:40:01,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:40:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:40:01,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:40:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:40:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:40:01,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:40:01,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754948664] [2021-10-28 09:40:01,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754948664] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:40:01,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490664237] [2021-10-28 09:40:01,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:40:01,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:40:01,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:40:01,362 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:40:01,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 09:40:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:40:01,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 09:40:01,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:40:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:40:02,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490664237] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:40:02,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:40:02,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-10-28 09:40:02,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354820014] [2021-10-28 09:40:02,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 09:40:02,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:40:02,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 09:40:02,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-10-28 09:40:02,170 INFO L87 Difference]: Start difference. First operand 412 states and 462 transitions. Second operand has 27 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:40:02,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:40:02,982 INFO L93 Difference]: Finished difference Result 517 states and 572 transitions. [2021-10-28 09:40:02,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 09:40:02,983 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2021-10-28 09:40:02,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:40:02,986 INFO L225 Difference]: With dead ends: 517 [2021-10-28 09:40:02,986 INFO L226 Difference]: Without dead ends: 515 [2021-10-28 09:40:02,987 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 09:40:02,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-10-28 09:40:03,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 436. [2021-10-28 09:40:03,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 423 states have (on average 1.1371158392434988) internal successors, (481), 427 states have internal predecessors, (481), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:40:03,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 489 transitions. [2021-10-28 09:40:03,011 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 489 transitions. Word has length 65 [2021-10-28 09:40:03,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:40:03,011 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 489 transitions. [2021-10-28 09:40:03,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:40:03,012 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 489 transitions. [2021-10-28 09:40:03,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-28 09:40:03,013 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:40:03,013 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:40:03,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 09:40:03,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:40:03,230 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:40:03,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:40:03,231 INFO L85 PathProgramCache]: Analyzing trace with hash 694033474, now seen corresponding path program 4 times [2021-10-28 09:40:03,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:40:03,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215580864] [2021-10-28 09:40:03,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:40:03,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:40:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:40:04,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:40:04,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:40:04,024 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:40:04,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:40:04,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215580864] [2021-10-28 09:40:04,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215580864] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:40:04,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974281037] [2021-10-28 09:40:04,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:40:04,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:40:04,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:40:04,030 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:40:04,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 09:40:04,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:40:04,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:40:04,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 78 conjunts are in the unsatisfiable core [2021-10-28 09:40:04,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:40:04,525 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:40:04,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:40:04,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 09:40:05,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-28 09:40:05,080 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 28 treesize of output 27 [2021-10-28 09:40:06,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-10-28 09:40:07,696 INFO L354 Elim1Store]: treesize reduction 121, result has 6.2 percent of original size [2021-10-28 09:40:07,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 42 [2021-10-28 09:40:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:40:07,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974281037] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:40:07,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:40:07,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 50 [2021-10-28 09:40:07,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790115673] [2021-10-28 09:40:07,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-10-28 09:40:07,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:40:07,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-10-28 09:40:07,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 09:40:07,756 INFO L87 Difference]: Start difference. First operand 436 states and 489 transitions. Second operand has 50 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 47 states have internal predecessors, (122), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:40:12,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:40:12,317 INFO L93 Difference]: Finished difference Result 821 states and 911 transitions. [2021-10-28 09:40:12,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-28 09:40:12,318 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 47 states have internal predecessors, (122), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-10-28 09:40:12,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:40:12,322 INFO L225 Difference]: With dead ends: 821 [2021-10-28 09:40:12,322 INFO L226 Difference]: Without dead ends: 771 [2021-10-28 09:40:12,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1629 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=709, Invalid=7481, Unknown=0, NotChecked=0, Total=8190 [2021-10-28 09:40:12,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-10-28 09:40:12,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 747. [2021-10-28 09:40:12,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 731 states have (on average 1.1422708618331054) internal successors, (835), 735 states have internal predecessors, (835), 10 states have call successors, (10), 10 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:40:12,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 846 transitions. [2021-10-28 09:40:12,347 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 846 transitions. Word has length 68 [2021-10-28 09:40:12,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:40:12,347 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 846 transitions. [2021-10-28 09:40:12,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 47 states have internal predecessors, (122), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:40:12,348 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 846 transitions. [2021-10-28 09:40:12,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-28 09:40:12,350 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:40:12,350 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:40:12,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-28 09:40:12,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-28 09:40:12,567 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:40:12,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:40:12,567 INFO L85 PathProgramCache]: Analyzing trace with hash -682229399, now seen corresponding path program 8 times [2021-10-28 09:40:12,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:40:12,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802209247] [2021-10-28 09:40:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:40:12,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:40:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:40:12,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:40:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:40:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:40:12,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:40:12,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802209247] [2021-10-28 09:40:12,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802209247] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:40:12,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877875284] [2021-10-28 09:40:12,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:40:12,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:40:12,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:40:12,898 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:40:12,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 09:40:13,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:40:13,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:40:13,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-28 09:40:13,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:40:13,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:40:14,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 09:40:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:40:14,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877875284] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:40:14,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:40:14,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 32 [2021-10-28 09:40:14,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990540675] [2021-10-28 09:40:14,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 09:40:14,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:40:14,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 09:40:14,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2021-10-28 09:40:14,233 INFO L87 Difference]: Start difference. First operand 747 states and 846 transitions. Second operand has 32 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:40:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:40:15,849 INFO L93 Difference]: Finished difference Result 1110 states and 1232 transitions. [2021-10-28 09:40:15,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 09:40:15,850 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-10-28 09:40:15,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:40:15,856 INFO L225 Difference]: With dead ends: 1110 [2021-10-28 09:40:15,857 INFO L226 Difference]: Without dead ends: 1057 [2021-10-28 09:40:15,858 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=204, Invalid=1776, Unknown=0, NotChecked=0, Total=1980 [2021-10-28 09:40:15,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-10-28 09:40:15,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 959. [2021-10-28 09:40:15,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 941 states have (on average 1.1349628055260361) internal successors, (1068), 945 states have internal predecessors, (1068), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:40:15,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1081 transitions. [2021-10-28 09:40:15,891 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1081 transitions. Word has length 71 [2021-10-28 09:40:15,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:40:15,892 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 1081 transitions. [2021-10-28 09:40:15,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:40:15,892 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1081 transitions. [2021-10-28 09:40:15,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-10-28 09:40:15,894 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:40:15,895 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:40:15,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 09:40:16,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-28 09:40:16,110 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:40:16,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:40:16,110 INFO L85 PathProgramCache]: Analyzing trace with hash -853851937, now seen corresponding path program 5 times [2021-10-28 09:40:16,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:40:16,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682925294] [2021-10-28 09:40:16,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:40:16,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:40:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:40:16,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:40:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:40:16,322 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:40:16,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:40:16,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682925294] [2021-10-28 09:40:16,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682925294] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:40:16,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665827995] [2021-10-28 09:40:16,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:40:16,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:40:16,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:40:16,323 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:40:16,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 09:40:16,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-28 09:40:16,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:40:16,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-28 09:40:16,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:40:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:40:17,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665827995] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:40:17,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:40:17,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-10-28 09:40:17,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841455604] [2021-10-28 09:40:17,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 09:40:17,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:40:17,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 09:40:17,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-10-28 09:40:17,457 INFO L87 Difference]: Start difference. First operand 959 states and 1081 transitions. Second operand has 20 states, 19 states have (on average 5.526315789473684) internal successors, (105), 17 states have internal predecessors, (105), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:40:18,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:40:18,213 INFO L93 Difference]: Finished difference Result 1235 states and 1372 transitions. [2021-10-28 09:40:18,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:40:18,214 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.526315789473684) internal successors, (105), 17 states have internal predecessors, (105), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-10-28 09:40:18,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:40:18,222 INFO L225 Difference]: With dead ends: 1235 [2021-10-28 09:40:18,222 INFO L226 Difference]: Without dead ends: 1235 [2021-10-28 09:40:18,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-10-28 09:40:18,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2021-10-28 09:40:18,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1091. [2021-10-28 09:40:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 1073 states have (on average 1.1332712022367195) internal successors, (1216), 1077 states have internal predecessors, (1216), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:40:18,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1229 transitions. [2021-10-28 09:40:18,267 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1229 transitions. Word has length 72 [2021-10-28 09:40:18,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:40:18,267 INFO L470 AbstractCegarLoop]: Abstraction has 1091 states and 1229 transitions. [2021-10-28 09:40:18,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.526315789473684) internal successors, (105), 17 states have internal predecessors, (105), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:40:18,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1229 transitions. [2021-10-28 09:40:18,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-28 09:40:18,270 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:40:18,271 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:40:18,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 09:40:18,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:40:18,494 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:40:18,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:40:18,494 INFO L85 PathProgramCache]: Analyzing trace with hash 646360812, now seen corresponding path program 9 times [2021-10-28 09:40:18,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:40:18,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112436062] [2021-10-28 09:40:18,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:40:18,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:40:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:40:18,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:40:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:40:18,873 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:40:18,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:40:18,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112436062] [2021-10-28 09:40:18,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112436062] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:40:18,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336992996] [2021-10-28 09:40:18,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:40:18,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:40:18,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:40:18,894 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:40:18,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 09:40:19,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-28 09:40:19,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:40:19,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-28 09:40:19,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:40:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:40:20,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336992996] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:40:20,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:40:20,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-10-28 09:40:20,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225483546] [2021-10-28 09:40:20,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 09:40:20,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:40:20,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 09:40:20,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 09:40:20,274 INFO L87 Difference]: Start difference. First operand 1091 states and 1229 transitions. Second operand has 35 states, 32 states have (on average 4.3125) internal successors, (138), 32 states have internal predecessors, (138), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:40:21,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:40:21,373 INFO L93 Difference]: Finished difference Result 1346 states and 1502 transitions. [2021-10-28 09:40:21,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 09:40:21,374 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 4.3125) internal successors, (138), 32 states have internal predecessors, (138), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-10-28 09:40:21,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:40:21,383 INFO L225 Difference]: With dead ends: 1346 [2021-10-28 09:40:21,383 INFO L226 Difference]: Without dead ends: 1344 [2021-10-28 09:40:21,384 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=260, Invalid=1632, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 09:40:21,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-10-28 09:40:21,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1139. [2021-10-28 09:40:21,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 1121 states have (on average 1.1338090990187333) internal successors, (1271), 1125 states have internal predecessors, (1271), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:40:21,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1284 transitions. [2021-10-28 09:40:21,438 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1284 transitions. Word has length 75 [2021-10-28 09:40:21,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:40:21,439 INFO L470 AbstractCegarLoop]: Abstraction has 1139 states and 1284 transitions. [2021-10-28 09:40:21,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 4.3125) internal successors, (138), 32 states have internal predecessors, (138), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:40:21,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1284 transitions. [2021-10-28 09:40:21,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-28 09:40:21,442 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:40:21,442 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:40:21,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 09:40:21,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:40:21,658 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:40:21,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:40:21,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1976019021, now seen corresponding path program 1 times [2021-10-28 09:40:21,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:40:21,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474350350] [2021-10-28 09:40:21,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:40:21,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:40:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:40:22,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:40:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:40:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 09:40:22,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:40:22,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474350350] [2021-10-28 09:40:22,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474350350] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:40:22,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288640954] [2021-10-28 09:40:22,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:40:22,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:40:22,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:40:22,138 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:40:22,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 09:40:22,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:40:22,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-28 09:40:22,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:40:22,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 09:40:23,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:40:23,185 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-28 09:40:23,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-28 09:40:24,394 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-28 09:40:24,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-10-28 09:40:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 09:40:24,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288640954] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:40:24,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:40:24,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14] total 35 [2021-10-28 09:40:24,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929258622] [2021-10-28 09:40:24,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 09:40:24,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:40:24,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 09:40:24,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1113, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 09:40:24,447 INFO L87 Difference]: Start difference. First operand 1139 states and 1284 transitions. Second operand has 35 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 32 states have internal predecessors, (124), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:40:51,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:40:51,062 INFO L93 Difference]: Finished difference Result 1169 states and 1285 transitions. [2021-10-28 09:40:51,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 09:40:51,063 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 32 states have internal predecessors, (124), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-10-28 09:40:51,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:40:51,068 INFO L225 Difference]: With dead ends: 1169 [2021-10-28 09:40:51,068 INFO L226 Difference]: Without dead ends: 901 [2021-10-28 09:40:51,069 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=249, Invalid=2507, Unknown=0, NotChecked=0, Total=2756 [2021-10-28 09:40:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-10-28 09:40:51,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 786. [2021-10-28 09:40:51,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 771 states have (on average 1.1335927367055771) internal successors, (874), 775 states have internal predecessors, (874), 9 states have call successors, (9), 9 states have call predecessors, (9), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:40:51,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 884 transitions. [2021-10-28 09:40:51,093 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 884 transitions. Word has length 78 [2021-10-28 09:40:51,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:40:51,094 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 884 transitions. [2021-10-28 09:40:51,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 32 states have internal predecessors, (124), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:40:51,094 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 884 transitions. [2021-10-28 09:40:51,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-10-28 09:40:51,096 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:40:51,097 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:40:51,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 09:40:51,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-28 09:40:51,310 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:40:51,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:40:51,310 INFO L85 PathProgramCache]: Analyzing trace with hash 648732352, now seen corresponding path program 10 times [2021-10-28 09:40:51,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:40:51,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895470120] [2021-10-28 09:40:51,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:40:51,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:40:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:40:51,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:40:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:40:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:40:51,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:40:51,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895470120] [2021-10-28 09:40:51,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895470120] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:40:51,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965261635] [2021-10-28 09:40:51,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:40:51,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:40:51,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:40:51,738 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:40:51,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 09:40:52,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:40:52,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:40:52,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-28 09:40:52,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:40:52,576 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:40:52,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:40:53,016 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 15 treesize of output 11 [2021-10-28 09:40:53,602 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-10-28 09:40:53,603 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 34 treesize of output 25 [2021-10-28 09:40:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 86 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:40:53,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965261635] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:40:53,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:40:53,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 41 [2021-10-28 09:40:53,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569765472] [2021-10-28 09:40:53,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-28 09:40:53,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:40:53,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-28 09:40:53,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1500, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 09:40:53,641 INFO L87 Difference]: Start difference. First operand 786 states and 884 transitions. Second operand has 41 states, 39 states have (on average 3.6923076923076925) internal successors, (144), 38 states have internal predecessors, (144), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:40:56,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:40:56,046 INFO L93 Difference]: Finished difference Result 1292 states and 1413 transitions. [2021-10-28 09:40:56,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-28 09:40:56,047 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 3.6923076923076925) internal successors, (144), 38 states have internal predecessors, (144), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2021-10-28 09:40:56,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:40:56,054 INFO L225 Difference]: With dead ends: 1292 [2021-10-28 09:40:56,054 INFO L226 Difference]: Without dead ends: 1173 [2021-10-28 09:40:56,057 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=583, Invalid=5117, Unknown=0, NotChecked=0, Total=5700 [2021-10-28 09:40:56,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-10-28 09:40:56,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 953. [2021-10-28 09:40:56,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 937 states have (on average 1.1302027748132337) internal successors, (1059), 941 states have internal predecessors, (1059), 10 states have call successors, (10), 10 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:40:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1070 transitions. [2021-10-28 09:40:56,089 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1070 transitions. Word has length 81 [2021-10-28 09:40:56,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:40:56,089 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 1070 transitions. [2021-10-28 09:40:56,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 3.6923076923076925) internal successors, (144), 38 states have internal predecessors, (144), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:40:56,090 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1070 transitions. [2021-10-28 09:40:56,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-28 09:40:56,092 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:40:56,092 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:40:56,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 09:40:56,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-28 09:40:56,316 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:40:56,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:40:56,317 INFO L85 PathProgramCache]: Analyzing trace with hash -139541373, now seen corresponding path program 11 times [2021-10-28 09:40:56,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:40:56,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012307911] [2021-10-28 09:40:56,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:40:56,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:40:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:40:56,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:40:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:40:56,698 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:40:56,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:40:56,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012307911] [2021-10-28 09:40:56,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012307911] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:40:56,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223736029] [2021-10-28 09:40:56,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:40:56,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:40:56,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:40:56,700 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:40:56,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 09:40:57,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-28 09:40:57,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:40:57,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-28 09:40:57,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:40:57,868 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:40:57,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:40:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:40:58,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223736029] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:40:58,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:40:58,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 27 [2021-10-28 09:40:58,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520236082] [2021-10-28 09:40:58,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 09:40:58,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:40:58,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 09:40:58,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-10-28 09:40:58,661 INFO L87 Difference]: Start difference. First operand 953 states and 1070 transitions. Second operand has 28 states, 27 states have (on average 4.666666666666667) internal successors, (126), 26 states have internal predecessors, (126), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:41:00,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:41:00,041 INFO L93 Difference]: Finished difference Result 1170 states and 1296 transitions. [2021-10-28 09:41:00,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 09:41:00,041 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.666666666666667) internal successors, (126), 26 states have internal predecessors, (126), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-10-28 09:41:00,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:41:00,046 INFO L225 Difference]: With dead ends: 1170 [2021-10-28 09:41:00,046 INFO L226 Difference]: Without dead ends: 1168 [2021-10-28 09:41:00,046 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 09:41:00,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-10-28 09:41:00,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 989. [2021-10-28 09:41:00,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 973 states have (on average 1.1305241521068858) internal successors, (1100), 977 states have internal predecessors, (1100), 10 states have call successors, (10), 10 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:41:00,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1111 transitions. [2021-10-28 09:41:00,077 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1111 transitions. Word has length 85 [2021-10-28 09:41:00,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:41:00,077 INFO L470 AbstractCegarLoop]: Abstraction has 989 states and 1111 transitions. [2021-10-28 09:41:00,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.666666666666667) internal successors, (126), 26 states have internal predecessors, (126), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:41:00,078 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1111 transitions. [2021-10-28 09:41:00,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-28 09:41:00,080 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:41:00,080 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:41:00,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 09:41:00,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-28 09:41:00,305 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:41:00,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:41:00,305 INFO L85 PathProgramCache]: Analyzing trace with hash -2060735684, now seen corresponding path program 6 times [2021-10-28 09:41:00,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:41:00,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526274430] [2021-10-28 09:41:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:41:00,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:41:00,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:41:00,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:41:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:41:00,953 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:41:00,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:41:00,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526274430] [2021-10-28 09:41:00,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526274430] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:41:00,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928544085] [2021-10-28 09:41:00,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:41:00,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:41:00,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:41:00,958 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:41:00,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 09:41:02,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-28 09:41:02,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:41:02,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 53 conjunts are in the unsatisfiable core [2021-10-28 09:41:02,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:41:02,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 09:41:02,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:41:02,487 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-28 09:41:02,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-28 09:41:05,009 INFO L354 Elim1Store]: treesize reduction 61, result has 29.9 percent of original size [2021-10-28 09:41:05,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 53 treesize of output 52 [2021-10-28 09:41:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:41:05,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928544085] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:41:05,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:41:05,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21] total 44 [2021-10-28 09:41:05,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023621435] [2021-10-28 09:41:05,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-28 09:41:05,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:41:05,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-28 09:41:05,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1791, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 09:41:05,072 INFO L87 Difference]: Start difference. First operand 989 states and 1111 transitions. Second operand has 44 states, 43 states have (on average 3.627906976744186) internal successors, (156), 41 states have internal predecessors, (156), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:42:50,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:42:50,389 INFO L93 Difference]: Finished difference Result 2315 states and 2564 transitions. [2021-10-28 09:42:50,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-28 09:42:50,390 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.627906976744186) internal successors, (156), 41 states have internal predecessors, (156), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-10-28 09:42:50,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:42:50,396 INFO L225 Difference]: With dead ends: 2315 [2021-10-28 09:42:50,396 INFO L226 Difference]: Without dead ends: 1452 [2021-10-28 09:42:50,398 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 99.3s TimeCoverageRelationStatistics Valid=535, Invalid=5626, Unknown=1, NotChecked=0, Total=6162 [2021-10-28 09:42:50,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2021-10-28 09:42:50,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 1135. [2021-10-28 09:42:50,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1118 states have (on average 1.1368515205724508) internal successors, (1271), 1122 states have internal predecessors, (1271), 11 states have call successors, (11), 11 states have call predecessors, (11), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:42:50,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1283 transitions. [2021-10-28 09:42:50,425 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1283 transitions. Word has length 85 [2021-10-28 09:42:50,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:42:50,426 INFO L470 AbstractCegarLoop]: Abstraction has 1135 states and 1283 transitions. [2021-10-28 09:42:50,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.627906976744186) internal successors, (156), 41 states have internal predecessors, (156), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:42:50,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1283 transitions. [2021-10-28 09:42:50,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-28 09:42:50,428 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:42:50,429 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:42:50,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 09:42:50,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-28 09:42:50,644 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:42:50,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:42:50,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1146270783, now seen corresponding path program 7 times [2021-10-28 09:42:50,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:42:50,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054956378] [2021-10-28 09:42:50,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:42:50,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:42:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:42:50,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:42:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:42:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 6 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:42:50,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:42:50,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054956378] [2021-10-28 09:42:50,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054956378] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:42:50,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991666713] [2021-10-28 09:42:50,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:42:50,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:42:50,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:42:50,906 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:42:50,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 09:42:51,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:42:51,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 09:42:51,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:42:52,372 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:42:52,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991666713] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:42:52,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:42:52,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-10-28 09:42:52,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136056538] [2021-10-28 09:42:52,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-28 09:42:52,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:42:52,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-28 09:42:52,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-10-28 09:42:52,375 INFO L87 Difference]: Start difference. First operand 1135 states and 1283 transitions. Second operand has 24 states, 23 states have (on average 5.478260869565218) internal successors, (126), 21 states have internal predecessors, (126), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:42:53,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:42:53,374 INFO L93 Difference]: Finished difference Result 1509 states and 1683 transitions. [2021-10-28 09:42:53,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 09:42:53,374 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.478260869565218) internal successors, (126), 21 states have internal predecessors, (126), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2021-10-28 09:42:53,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:42:53,379 INFO L225 Difference]: With dead ends: 1509 [2021-10-28 09:42:53,380 INFO L226 Difference]: Without dead ends: 1509 [2021-10-28 09:42:53,380 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2021-10-28 09:42:53,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-10-28 09:42:53,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1316. [2021-10-28 09:42:53,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 1299 states have (on average 1.134719014626636) internal successors, (1474), 1303 states have internal predecessors, (1474), 11 states have call successors, (11), 11 states have call predecessors, (11), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:42:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 1486 transitions. [2021-10-28 09:42:53,410 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 1486 transitions. Word has length 89 [2021-10-28 09:42:53,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:42:53,411 INFO L470 AbstractCegarLoop]: Abstraction has 1316 states and 1486 transitions. [2021-10-28 09:42:53,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.478260869565218) internal successors, (126), 21 states have internal predecessors, (126), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:42:53,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 1486 transitions. [2021-10-28 09:42:53,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-10-28 09:42:53,414 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:42:53,414 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:42:53,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 09:42:53,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-28 09:42:53,628 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:42:53,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:42:53,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1870911721, now seen corresponding path program 12 times [2021-10-28 09:42:53,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:42:53,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898443686] [2021-10-28 09:42:53,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:42:53,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:42:53,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:42:54,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:42:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:42:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:42:54,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:42:54,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898443686] [2021-10-28 09:42:54,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898443686] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:42:54,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542085177] [2021-10-28 09:42:54,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:42:54,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:42:54,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:42:54,154 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:42:54,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 09:42:55,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-10-28 09:42:55,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:42:55,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-28 09:42:55,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:42:55,368 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:42:55,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:42:55,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 09:42:57,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:42:57,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-10-28 09:42:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 45 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:42:57,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542085177] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:42:57,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:42:57,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 48 [2021-10-28 09:42:57,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917040436] [2021-10-28 09:42:57,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-28 09:42:57,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:42:57,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-28 09:42:57,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2086, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 09:42:57,420 INFO L87 Difference]: Start difference. First operand 1316 states and 1486 transitions. Second operand has 48 states, 46 states have (on average 3.6956521739130435) internal successors, (170), 45 states have internal predecessors, (170), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:43:02,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:43:02,347 INFO L93 Difference]: Finished difference Result 2363 states and 2591 transitions. [2021-10-28 09:43:02,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-28 09:43:02,348 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 3.6956521739130435) internal successors, (170), 45 states have internal predecessors, (170), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2021-10-28 09:43:02,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:43:02,355 INFO L225 Difference]: With dead ends: 2363 [2021-10-28 09:43:02,355 INFO L226 Difference]: Without dead ends: 2074 [2021-10-28 09:43:02,356 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1758 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=814, Invalid=6842, Unknown=0, NotChecked=0, Total=7656 [2021-10-28 09:43:02,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2021-10-28 09:43:02,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1608. [2021-10-28 09:43:02,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1590 states have (on average 1.1327044025157234) internal successors, (1801), 1594 states have internal predecessors, (1801), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:43:02,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 1814 transitions. [2021-10-28 09:43:02,394 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 1814 transitions. Word has length 91 [2021-10-28 09:43:02,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:43:02,394 INFO L470 AbstractCegarLoop]: Abstraction has 1608 states and 1814 transitions. [2021-10-28 09:43:02,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 3.6956521739130435) internal successors, (170), 45 states have internal predecessors, (170), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:43:02,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 1814 transitions. [2021-10-28 09:43:02,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-10-28 09:43:02,398 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:43:02,398 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:43:02,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 09:43:02,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:43:02,619 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:43:02,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:43:02,620 INFO L85 PathProgramCache]: Analyzing trace with hash 592464494, now seen corresponding path program 13 times [2021-10-28 09:43:02,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:43:02,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726146662] [2021-10-28 09:43:02,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:43:02,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:43:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:43:03,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:43:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:43:03,101 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:43:03,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:43:03,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726146662] [2021-10-28 09:43:03,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726146662] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:43:03,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664537869] [2021-10-28 09:43:03,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:43:03,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:43:03,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:43:03,104 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:43:03,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 09:43:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:43:04,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 64 conjunts are in the unsatisfiable core [2021-10-28 09:43:04,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:43:04,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:43:04,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 09:43:05,000 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:43:05,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664537869] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:43:05,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:43:05,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 41 [2021-10-28 09:43:05,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585848348] [2021-10-28 09:43:05,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-28 09:43:05,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:43:05,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-28 09:43:05,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1533, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 09:43:05,002 INFO L87 Difference]: Start difference. First operand 1608 states and 1814 transitions. Second operand has 41 states, 39 states have (on average 3.769230769230769) internal successors, (147), 38 states have internal predecessors, (147), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:43:07,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:43:07,310 INFO L93 Difference]: Finished difference Result 2372 states and 2629 transitions. [2021-10-28 09:43:07,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 09:43:07,311 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 3.769230769230769) internal successors, (147), 38 states have internal predecessors, (147), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2021-10-28 09:43:07,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:43:07,320 INFO L225 Difference]: With dead ends: 2372 [2021-10-28 09:43:07,321 INFO L226 Difference]: Without dead ends: 2046 [2021-10-28 09:43:07,321 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=258, Invalid=2934, Unknown=0, NotChecked=0, Total=3192 [2021-10-28 09:43:07,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-10-28 09:43:07,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1876. [2021-10-28 09:43:07,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1857 states have (on average 1.1313947226709746) internal successors, (2101), 1861 states have internal predecessors, (2101), 13 states have call successors, (13), 13 states have call predecessors, (13), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:43:07,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 2115 transitions. [2021-10-28 09:43:07,359 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 2115 transitions. Word has length 101 [2021-10-28 09:43:07,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:43:07,359 INFO L470 AbstractCegarLoop]: Abstraction has 1876 states and 2115 transitions. [2021-10-28 09:43:07,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 3.769230769230769) internal successors, (147), 38 states have internal predecessors, (147), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:43:07,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 2115 transitions. [2021-10-28 09:43:07,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-10-28 09:43:07,363 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:43:07,363 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:43:07,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 09:43:07,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:43:07,578 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:43:07,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:43:07,578 INFO L85 PathProgramCache]: Analyzing trace with hash 336770012, now seen corresponding path program 8 times [2021-10-28 09:43:07,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:43:07,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315187128] [2021-10-28 09:43:07,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:43:07,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:43:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:43:08,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:43:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:43:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:43:08,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:43:08,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315187128] [2021-10-28 09:43:08,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315187128] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:43:08,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073626383] [2021-10-28 09:43:08,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:43:08,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:43:08,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:43:08,266 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:43:08,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 09:43:09,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:43:09,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:43:09,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 84 conjunts are in the unsatisfiable core [2021-10-28 09:43:09,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:43:09,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 09:43:09,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:43:09,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-10-28 09:43:12,891 INFO L354 Elim1Store]: treesize reduction 129, result has 5.8 percent of original size [2021-10-28 09:43:12,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 37 [2021-10-28 09:43:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:43:12,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073626383] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:43:12,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:43:12,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-10-28 09:43:12,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843299756] [2021-10-28 09:43:12,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-28 09:43:12,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:43:12,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-28 09:43:12,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2522, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 09:43:12,948 INFO L87 Difference]: Start difference. First operand 1876 states and 2115 transitions. Second operand has 52 states, 51 states have (on average 3.7254901960784315) internal successors, (190), 49 states have internal predecessors, (190), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:43:16,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:43:16,958 INFO L93 Difference]: Finished difference Result 4495 states and 5035 transitions. [2021-10-28 09:43:16,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 09:43:16,959 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 3.7254901960784315) internal successors, (190), 49 states have internal predecessors, (190), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-10-28 09:43:16,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:43:16,973 INFO L225 Difference]: With dead ends: 4495 [2021-10-28 09:43:16,973 INFO L226 Difference]: Without dead ends: 4413 [2021-10-28 09:43:16,974 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=349, Invalid=4763, Unknown=0, NotChecked=0, Total=5112 [2021-10-28 09:43:16,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4413 states. [2021-10-28 09:43:17,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4413 to 2901. [2021-10-28 09:43:17,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2901 states, 2875 states have (on average 1.1255652173913044) internal successors, (3236), 2879 states have internal predecessors, (3236), 20 states have call successors, (20), 20 states have call predecessors, (20), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:43:17,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2901 states to 2901 states and 3257 transitions. [2021-10-28 09:43:17,029 INFO L78 Accepts]: Start accepts. Automaton has 2901 states and 3257 transitions. Word has length 102 [2021-10-28 09:43:17,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:43:17,030 INFO L470 AbstractCegarLoop]: Abstraction has 2901 states and 3257 transitions. [2021-10-28 09:43:17,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 3.7254901960784315) internal successors, (190), 49 states have internal predecessors, (190), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:43:17,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2901 states and 3257 transitions. [2021-10-28 09:43:17,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-28 09:43:17,036 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:43:17,036 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:43:17,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-28 09:43:17,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:43:17,254 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:43:17,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:43:17,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1057836879, now seen corresponding path program 14 times [2021-10-28 09:43:17,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:43:17,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919986282] [2021-10-28 09:43:17,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:43:17,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:43:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:43:17,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:43:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:43:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 66 proven. 230 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:43:17,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:43:17,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919986282] [2021-10-28 09:43:17,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919986282] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:43:17,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932113060] [2021-10-28 09:43:17,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:43:17,700 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:43:17,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:43:17,700 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:43:17,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 09:43:18,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:43:18,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:43:18,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-28 09:43:18,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:43:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 91 proven. 205 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:43:19,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932113060] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:43:19,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:43:19,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 38 [2021-10-28 09:43:19,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779883100] [2021-10-28 09:43:19,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-28 09:43:19,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:43:19,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-28 09:43:19,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1304, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 09:43:19,647 INFO L87 Difference]: Start difference. First operand 2901 states and 3257 transitions. Second operand has 39 states, 36 states have (on average 4.305555555555555) internal successors, (155), 36 states have internal predecessors, (155), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:43:21,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:43:21,380 INFO L93 Difference]: Finished difference Result 3470 states and 3847 transitions. [2021-10-28 09:43:21,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 09:43:21,390 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 4.305555555555555) internal successors, (155), 36 states have internal predecessors, (155), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2021-10-28 09:43:21,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:43:21,405 INFO L225 Difference]: With dead ends: 3470 [2021-10-28 09:43:21,406 INFO L226 Difference]: Without dead ends: 3468 [2021-10-28 09:43:21,406 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=305, Invalid=2245, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 09:43:21,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3468 states. [2021-10-28 09:43:21,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3468 to 2973. [2021-10-28 09:43:21,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2973 states, 2947 states have (on average 1.1262300644723449) internal successors, (3319), 2951 states have internal predecessors, (3319), 20 states have call successors, (20), 20 states have call predecessors, (20), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:43:21,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 3340 transitions. [2021-10-28 09:43:21,473 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 3340 transitions. Word has length 105 [2021-10-28 09:43:21,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:43:21,473 INFO L470 AbstractCegarLoop]: Abstraction has 2973 states and 3340 transitions. [2021-10-28 09:43:21,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 4.305555555555555) internal successors, (155), 36 states have internal predecessors, (155), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:43:21,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 3340 transitions. [2021-10-28 09:43:21,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-28 09:43:21,480 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:43:21,480 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:43:21,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-28 09:43:21,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:43:21,706 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:43:21,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:43:21,706 INFO L85 PathProgramCache]: Analyzing trace with hash 376729913, now seen corresponding path program 9 times [2021-10-28 09:43:21,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:43:21,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812098430] [2021-10-28 09:43:21,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:43:21,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:43:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:43:21,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:43:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:43:21,991 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 15 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:43:21,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:43:21,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812098430] [2021-10-28 09:43:21,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812098430] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:43:21,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969203976] [2021-10-28 09:43:21,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:43:21,993 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:43:21,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:43:22,006 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:43:22,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-28 09:43:23,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-28 09:43:23,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:43:23,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 09:43:23,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:43:23,425 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 09:43:23,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 09:43:23,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-10-28 09:43:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 28 proven. 152 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:43:24,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969203976] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:43:24,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:43:24,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-10-28 09:43:24,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680320452] [2021-10-28 09:43:24,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-28 09:43:24,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:43:24,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-28 09:43:24,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-10-28 09:43:24,329 INFO L87 Difference]: Start difference. First operand 2973 states and 3340 transitions. Second operand has 31 states, 30 states have (on average 6.666666666666667) internal successors, (200), 28 states have internal predecessors, (200), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:43:25,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:43:25,961 INFO L93 Difference]: Finished difference Result 4867 states and 5463 transitions. [2021-10-28 09:43:25,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 09:43:25,962 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 6.666666666666667) internal successors, (200), 28 states have internal predecessors, (200), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2021-10-28 09:43:25,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:43:25,983 INFO L225 Difference]: With dead ends: 4867 [2021-10-28 09:43:25,983 INFO L226 Difference]: Without dead ends: 4867 [2021-10-28 09:43:25,984 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=226, Invalid=1666, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 09:43:25,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4867 states. [2021-10-28 09:43:26,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4867 to 3258. [2021-10-28 09:43:26,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3258 states, 3232 states have (on average 1.1259282178217822) internal successors, (3639), 3236 states have internal predecessors, (3639), 20 states have call successors, (20), 20 states have call predecessors, (20), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:43:26,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3258 states to 3258 states and 3660 transitions. [2021-10-28 09:43:26,054 INFO L78 Accepts]: Start accepts. Automaton has 3258 states and 3660 transitions. Word has length 106 [2021-10-28 09:43:26,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:43:26,054 INFO L470 AbstractCegarLoop]: Abstraction has 3258 states and 3660 transitions. [2021-10-28 09:43:26,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 6.666666666666667) internal successors, (200), 28 states have internal predecessors, (200), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:43:26,055 INFO L276 IsEmpty]: Start isEmpty. Operand 3258 states and 3660 transitions. [2021-10-28 09:43:26,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-10-28 09:43:26,061 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:43:26,061 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:43:26,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-28 09:43:26,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-10-28 09:43:26,274 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:43:26,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:43:26,274 INFO L85 PathProgramCache]: Analyzing trace with hash -612517691, now seen corresponding path program 15 times [2021-10-28 09:43:26,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:43:26,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379829039] [2021-10-28 09:43:26,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:43:26,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:43:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:43:26,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:43:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:43:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:43:26,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:43:26,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379829039] [2021-10-28 09:43:26,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379829039] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:43:26,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47941555] [2021-10-28 09:43:26,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:43:26,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:43:26,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:43:26,797 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:43:26,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-28 09:43:28,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-28 09:43:28,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:43:28,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 70 conjunts are in the unsatisfiable core [2021-10-28 09:43:28,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:43:28,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:43:29,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 09:43:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:43:29,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47941555] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:43:29,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:43:29,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 44 [2021-10-28 09:43:29,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126620890] [2021-10-28 09:43:29,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-28 09:43:29,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:43:29,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-28 09:43:29,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1777, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 09:43:29,271 INFO L87 Difference]: Start difference. First operand 3258 states and 3660 transitions. Second operand has 44 states, 42 states have (on average 3.8333333333333335) internal successors, (161), 41 states have internal predecessors, (161), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:43:32,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:43:32,197 INFO L93 Difference]: Finished difference Result 4523 states and 5014 transitions. [2021-10-28 09:43:32,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 09:43:32,197 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 3.8333333333333335) internal successors, (161), 41 states have internal predecessors, (161), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2021-10-28 09:43:32,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:43:32,212 INFO L225 Difference]: With dead ends: 4523 [2021-10-28 09:43:32,213 INFO L226 Difference]: Without dead ends: 4146 [2021-10-28 09:43:32,213 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=276, Invalid=3384, Unknown=0, NotChecked=0, Total=3660 [2021-10-28 09:43:32,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4146 states. [2021-10-28 09:43:32,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4146 to 3807. [2021-10-28 09:43:32,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3807 states, 3779 states have (on average 1.1256946282085207) internal successors, (4254), 3783 states have internal predecessors, (4254), 22 states have call successors, (22), 22 states have call predecessors, (22), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:43:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3807 states to 3807 states and 4277 transitions. [2021-10-28 09:43:32,287 INFO L78 Accepts]: Start accepts. Automaton has 3807 states and 4277 transitions. Word has length 111 [2021-10-28 09:43:32,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:43:32,288 INFO L470 AbstractCegarLoop]: Abstraction has 3807 states and 4277 transitions. [2021-10-28 09:43:32,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 3.8333333333333335) internal successors, (161), 41 states have internal predecessors, (161), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:43:32,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3807 states and 4277 transitions. [2021-10-28 09:43:32,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-10-28 09:43:32,295 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:43:32,296 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:43:32,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-28 09:43:32,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-28 09:43:32,510 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:43:32,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:43:32,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1639319973, now seen corresponding path program 2 times [2021-10-28 09:43:32,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:43:32,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452596331] [2021-10-28 09:43:32,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:43:32,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:43:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:43:32,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:43:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:43:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 73 proven. 114 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 09:43:32,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:43:32,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452596331] [2021-10-28 09:43:32,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452596331] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:43:32,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107380191] [2021-10-28 09:43:32,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:43:32,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:43:32,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:43:32,911 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:43:32,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-28 09:43:34,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:43:34,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:43:34,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-28 09:43:34,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:43:34,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 09:43:34,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:43:34,752 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-28 09:43:34,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-28 09:43:36,257 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-28 09:43:36,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-10-28 09:43:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 73 proven. 114 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 09:43:36,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107380191] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:43:36,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:43:36,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-10-28 09:43:36,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750183414] [2021-10-28 09:43:36,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-28 09:43:36,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:43:36,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-28 09:43:36,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 09:43:36,294 INFO L87 Difference]: Start difference. First operand 3807 states and 4277 transitions. Second operand has 33 states, 32 states have (on average 5.625) internal successors, (180), 30 states have internal predecessors, (180), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:44:02,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:44:02,830 INFO L93 Difference]: Finished difference Result 5010 states and 5612 transitions. [2021-10-28 09:44:02,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 09:44:02,830 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 5.625) internal successors, (180), 30 states have internal predecessors, (180), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2021-10-28 09:44:02,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:44:02,839 INFO L225 Difference]: With dead ends: 5010 [2021-10-28 09:44:02,840 INFO L226 Difference]: Without dead ends: 3110 [2021-10-28 09:44:02,840 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=167, Invalid=1725, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 09:44:02,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2021-10-28 09:44:02,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 2572. [2021-10-28 09:44:02,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2572 states, 2552 states have (on average 1.130485893416928) internal successors, (2885), 2556 states have internal predecessors, (2885), 14 states have call successors, (14), 14 states have call predecessors, (14), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:44:02,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2572 states to 2572 states and 2900 transitions. [2021-10-28 09:44:02,881 INFO L78 Accepts]: Start accepts. Automaton has 2572 states and 2900 transitions. Word has length 112 [2021-10-28 09:44:02,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:44:02,881 INFO L470 AbstractCegarLoop]: Abstraction has 2572 states and 2900 transitions. [2021-10-28 09:44:02,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 5.625) internal successors, (180), 30 states have internal predecessors, (180), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:44:02,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2572 states and 2900 transitions. [2021-10-28 09:44:02,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-28 09:44:02,885 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:44:02,885 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:44:02,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-28 09:44:03,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-28 09:44:03,106 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:44:03,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:44:03,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1840473928, now seen corresponding path program 16 times [2021-10-28 09:44:03,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:44:03,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865686260] [2021-10-28 09:44:03,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:44:03,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:44:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:03,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:44:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 91 proven. 287 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:44:03,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:44:03,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865686260] [2021-10-28 09:44:03,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865686260] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:03,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840985977] [2021-10-28 09:44:03,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:44:03,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:44:03,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:44:03,582 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:44:03,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-28 09:44:05,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:44:05,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:44:05,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 69 conjunts are in the unsatisfiable core [2021-10-28 09:44:05,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:44:05,170 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:44:05,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:44:05,583 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 16 treesize of output 12 [2021-10-28 09:44:06,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:44:06,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-10-28 09:44:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 128 proven. 250 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:44:06,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840985977] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:06,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:44:06,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 29] total 45 [2021-10-28 09:44:06,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614796767] [2021-10-28 09:44:06,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-28 09:44:06,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:44:06,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-28 09:44:06,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1925, Unknown=0, NotChecked=0, Total=2070 [2021-10-28 09:44:06,913 INFO L87 Difference]: Start difference. First operand 2572 states and 2900 transitions. Second operand has 46 states, 43 states have (on average 4.27906976744186) internal successors, (184), 43 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:44:11,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:44:11,209 INFO L93 Difference]: Finished difference Result 3306 states and 3649 transitions. [2021-10-28 09:44:11,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-28 09:44:11,209 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 4.27906976744186) internal successors, (184), 43 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2021-10-28 09:44:11,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:44:11,213 INFO L225 Difference]: With dead ends: 3306 [2021-10-28 09:44:11,213 INFO L226 Difference]: Without dead ends: 3304 [2021-10-28 09:44:11,226 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=467, Invalid=4935, Unknown=0, NotChecked=0, Total=5402 [2021-10-28 09:44:11,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3304 states. [2021-10-28 09:44:11,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3304 to 2632. [2021-10-28 09:44:11,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2632 states, 2612 states have (on average 1.1309341500765697) internal successors, (2954), 2616 states have internal predecessors, (2954), 14 states have call successors, (14), 14 states have call predecessors, (14), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:44:11,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 2969 transitions. [2021-10-28 09:44:11,268 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 2969 transitions. Word has length 115 [2021-10-28 09:44:11,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:44:11,268 INFO L470 AbstractCegarLoop]: Abstraction has 2632 states and 2969 transitions. [2021-10-28 09:44:11,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 4.27906976744186) internal successors, (184), 43 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:44:11,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 2969 transitions. [2021-10-28 09:44:11,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-10-28 09:44:11,272 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:44:11,273 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:44:11,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-28 09:44:11,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-28 09:44:11,498 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:44:11,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:44:11,498 INFO L85 PathProgramCache]: Analyzing trace with hash -231121630, now seen corresponding path program 10 times [2021-10-28 09:44:11,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:44:11,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038768005] [2021-10-28 09:44:11,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:44:11,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:44:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:12,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:44:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:12,262 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 11 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:44:12,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:44:12,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038768005] [2021-10-28 09:44:12,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038768005] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:12,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254329199] [2021-10-28 09:44:12,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:44:12,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:44:12,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:44:12,270 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:44:12,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-28 09:44:13,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:44:13,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:44:13,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 85 conjunts are in the unsatisfiable core [2021-10-28 09:44:13,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:44:13,991 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:44:13,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:44:14,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 09:44:14,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-28 09:44:14,990 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 28 treesize of output 27 [2021-10-28 09:44:17,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-10-28 09:44:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 172 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:44:17,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254329199] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:17,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:44:17,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 53 [2021-10-28 09:44:17,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963983979] [2021-10-28 09:44:17,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-10-28 09:44:17,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:44:17,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-10-28 09:44:17,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2588, Unknown=0, NotChecked=0, Total=2756 [2021-10-28 09:44:17,885 INFO L87 Difference]: Start difference. First operand 2632 states and 2969 transitions. Second operand has 53 states, 52 states have (on average 4.3076923076923075) internal successors, (224), 50 states have internal predecessors, (224), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:44:34,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:44:34,344 INFO L93 Difference]: Finished difference Result 10112 states and 11252 transitions. [2021-10-28 09:44:34,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-10-28 09:44:34,344 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 4.3076923076923075) internal successors, (224), 50 states have internal predecessors, (224), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2021-10-28 09:44:34,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:44:34,359 INFO L225 Difference]: With dead ends: 10112 [2021-10-28 09:44:34,359 INFO L226 Difference]: Without dead ends: 9036 [2021-10-28 09:44:34,361 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9002 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=3229, Invalid=30811, Unknown=0, NotChecked=0, Total=34040 [2021-10-28 09:44:34,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9036 states. [2021-10-28 09:44:34,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9036 to 7309. [2021-10-28 09:44:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7309 states, 7281 states have (on average 1.126768301057547) internal successors, (8204), 7285 states have internal predecessors, (8204), 22 states have call successors, (22), 22 states have call predecessors, (22), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:44:34,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7309 states to 7309 states and 8227 transitions. [2021-10-28 09:44:34,521 INFO L78 Accepts]: Start accepts. Automaton has 7309 states and 8227 transitions. Word has length 119 [2021-10-28 09:44:34,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:44:34,522 INFO L470 AbstractCegarLoop]: Abstraction has 7309 states and 8227 transitions. [2021-10-28 09:44:34,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 4.3076923076923075) internal successors, (224), 50 states have internal predecessors, (224), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:44:34,522 INFO L276 IsEmpty]: Start isEmpty. Operand 7309 states and 8227 transitions. [2021-10-28 09:44:34,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-10-28 09:44:34,529 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:44:34,531 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:44:34,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-28 09:44:34,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-28 09:44:34,746 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:44:34,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:44:34,746 INFO L85 PathProgramCache]: Analyzing trace with hash -634723812, now seen corresponding path program 17 times [2021-10-28 09:44:34,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:44:34,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443507552] [2021-10-28 09:44:34,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:44:34,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:44:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:35,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:44:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:44:35,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:44:35,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443507552] [2021-10-28 09:44:35,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443507552] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:35,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475139666] [2021-10-28 09:44:35,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:44:35,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:44:35,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:44:35,405 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:44:35,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-28 09:44:37,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-10-28 09:44:37,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:44:37,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 76 conjunts are in the unsatisfiable core [2021-10-28 09:44:37,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:44:37,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:44:38,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 09:44:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:44:38,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475139666] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:38,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:44:38,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 47 [2021-10-28 09:44:38,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091541876] [2021-10-28 09:44:38,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-10-28 09:44:38,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:44:38,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-10-28 09:44:38,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=2039, Unknown=0, NotChecked=0, Total=2162 [2021-10-28 09:44:38,436 INFO L87 Difference]: Start difference. First operand 7309 states and 8227 transitions. Second operand has 47 states, 45 states have (on average 3.888888888888889) internal successors, (175), 44 states have internal predecessors, (175), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:44:41,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:44:41,738 INFO L93 Difference]: Finished difference Result 9740 states and 10859 transitions. [2021-10-28 09:44:41,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-28 09:44:41,738 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 3.888888888888889) internal successors, (175), 44 states have internal predecessors, (175), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2021-10-28 09:44:41,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:44:41,756 INFO L225 Difference]: With dead ends: 9740 [2021-10-28 09:44:41,756 INFO L226 Difference]: Without dead ends: 9294 [2021-10-28 09:44:41,757 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=294, Invalid=3866, Unknown=0, NotChecked=0, Total=4160 [2021-10-28 09:44:41,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9294 states. [2021-10-28 09:44:41,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9294 to 8505. [2021-10-28 09:44:41,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8505 states, 8475 states have (on average 1.1269616519174042) internal successors, (9551), 8479 states have internal predecessors, (9551), 24 states have call successors, (24), 24 states have call predecessors, (24), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:44:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8505 states to 8505 states and 9576 transitions. [2021-10-28 09:44:41,882 INFO L78 Accepts]: Start accepts. Automaton has 8505 states and 9576 transitions. Word has length 121 [2021-10-28 09:44:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:44:41,883 INFO L470 AbstractCegarLoop]: Abstraction has 8505 states and 9576 transitions. [2021-10-28 09:44:41,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 3.888888888888889) internal successors, (175), 44 states have internal predecessors, (175), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:44:41,883 INFO L276 IsEmpty]: Start isEmpty. Operand 8505 states and 9576 transitions. [2021-10-28 09:44:41,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-10-28 09:44:41,889 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:44:41,889 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:44:41,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-28 09:44:42,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-28 09:44:42,117 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:44:42,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:44:42,117 INFO L85 PathProgramCache]: Analyzing trace with hash -85432987, now seen corresponding path program 11 times [2021-10-28 09:44:42,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:44:42,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706432615] [2021-10-28 09:44:42,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:44:42,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:44:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:42,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:44:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 28 proven. 239 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:44:42,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:44:42,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706432615] [2021-10-28 09:44:42,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706432615] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:42,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905965733] [2021-10-28 09:44:42,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:44:42,493 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:44:42,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:44:42,498 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:44:42,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-28 09:44:44,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-28 09:44:44,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:44:44,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 53 conjunts are in the unsatisfiable core [2021-10-28 09:44:44,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:44:44,537 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 09:44:44,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 09:44:44,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-10-28 09:44:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 45 proven. 222 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:44:45,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905965733] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:45,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:44:45,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-10-28 09:44:45,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868716601] [2021-10-28 09:44:45,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-28 09:44:45,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:44:45,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-28 09:44:45,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-10-28 09:44:45,550 INFO L87 Difference]: Start difference. First operand 8505 states and 9576 transitions. Second operand has 31 states, 30 states have (on average 7.333333333333333) internal successors, (220), 29 states have internal predecessors, (220), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:44:47,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:44:47,133 INFO L93 Difference]: Finished difference Result 9376 states and 10524 transitions. [2021-10-28 09:44:47,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 09:44:47,133 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 7.333333333333333) internal successors, (220), 29 states have internal predecessors, (220), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2021-10-28 09:44:47,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:44:47,150 INFO L225 Difference]: With dead ends: 9376 [2021-10-28 09:44:47,150 INFO L226 Difference]: Without dead ends: 9376 [2021-10-28 09:44:47,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 09:44:47,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9376 states. [2021-10-28 09:44:47,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9376 to 8912. [2021-10-28 09:44:47,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8912 states, 8882 states have (on average 1.1268858365233057) internal successors, (10009), 8886 states have internal predecessors, (10009), 24 states have call successors, (24), 24 states have call predecessors, (24), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:44:47,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8912 states to 8912 states and 10034 transitions. [2021-10-28 09:44:47,273 INFO L78 Accepts]: Start accepts. Automaton has 8912 states and 10034 transitions. Word has length 123 [2021-10-28 09:44:47,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:44:47,274 INFO L470 AbstractCegarLoop]: Abstraction has 8912 states and 10034 transitions. [2021-10-28 09:44:47,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 7.333333333333333) internal successors, (220), 29 states have internal predecessors, (220), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:44:47,275 INFO L276 IsEmpty]: Start isEmpty. Operand 8912 states and 10034 transitions. [2021-10-28 09:44:47,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-10-28 09:44:47,281 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:44:47,282 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:44:47,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-28 09:44:47,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:44:47,498 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:44:47,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:44:47,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1868134177, now seen corresponding path program 18 times [2021-10-28 09:44:47,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:44:47,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215614298] [2021-10-28 09:44:47,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:44:47,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:44:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:48,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:44:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 120 proven. 350 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:44:48,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:44:48,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215614298] [2021-10-28 09:44:48,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215614298] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:48,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994898344] [2021-10-28 09:44:48,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:44:48,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:44:48,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:44:48,186 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:44:48,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-28 09:44:50,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-10-28 09:44:50,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:44:50,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 58 conjunts are in the unsatisfiable core [2021-10-28 09:44:50,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:44:50,458 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:44:50,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:44:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 153 proven. 317 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:44:51,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994898344] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:51,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:44:51,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 54 [2021-10-28 09:44:51,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118978779] [2021-10-28 09:44:51,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-10-28 09:44:51,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:44:51,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-10-28 09:44:51,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=2632, Unknown=0, NotChecked=0, Total=2970 [2021-10-28 09:44:51,888 INFO L87 Difference]: Start difference. First operand 8912 states and 10034 transitions. Second operand has 55 states, 53 states have (on average 4.490566037735849) internal successors, (238), 52 states have internal predecessors, (238), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:44:54,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:44:54,348 INFO L93 Difference]: Finished difference Result 10266 states and 11454 transitions. [2021-10-28 09:44:54,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 09:44:54,349 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 4.490566037735849) internal successors, (238), 52 states have internal predecessors, (238), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2021-10-28 09:44:54,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:44:54,362 INFO L225 Difference]: With dead ends: 10266 [2021-10-28 09:44:54,363 INFO L226 Difference]: Without dead ends: 10264 [2021-10-28 09:44:54,363 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=562, Invalid=4130, Unknown=0, NotChecked=0, Total=4692 [2021-10-28 09:44:54,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10264 states. [2021-10-28 09:44:54,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10264 to 9056. [2021-10-28 09:44:54,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9056 states, 9026 states have (on average 1.127409705295812) internal successors, (10176), 9030 states have internal predecessors, (10176), 24 states have call successors, (24), 24 states have call predecessors, (24), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:44:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9056 states to 9056 states and 10201 transitions. [2021-10-28 09:44:54,526 INFO L78 Accepts]: Start accepts. Automaton has 9056 states and 10201 transitions. Word has length 125 [2021-10-28 09:44:54,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:44:54,526 INFO L470 AbstractCegarLoop]: Abstraction has 9056 states and 10201 transitions. [2021-10-28 09:44:54,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 4.490566037735849) internal successors, (238), 52 states have internal predecessors, (238), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:44:54,527 INFO L276 IsEmpty]: Start isEmpty. Operand 9056 states and 10201 transitions. [2021-10-28 09:44:54,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-10-28 09:44:54,535 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:44:54,536 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:44:54,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-28 09:44:54,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-10-28 09:44:54,750 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:44:54,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:44:54,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1672595853, now seen corresponding path program 19 times [2021-10-28 09:44:54,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:44:54,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698657071] [2021-10-28 09:44:54,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:44:54,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:44:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:55,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:44:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:44:55,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:44:55,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698657071] [2021-10-28 09:44:55,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698657071] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:55,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410197297] [2021-10-28 09:44:55,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:44:55,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:44:55,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:44:55,542 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:44:55,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-28 09:44:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:57,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 82 conjunts are in the unsatisfiable core [2021-10-28 09:44:57,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:44:58,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:44:58,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 09:44:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:44:58,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410197297] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:58,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:44:58,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31] total 50 [2021-10-28 09:44:58,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164546331] [2021-10-28 09:44:58,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-10-28 09:44:58,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:44:58,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-10-28 09:44:58,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2319, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 09:44:58,665 INFO L87 Difference]: Start difference. First operand 9056 states and 10201 transitions. Second operand has 50 states, 48 states have (on average 3.9375) internal successors, (189), 47 states have internal predecessors, (189), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:45:02,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:02,598 INFO L93 Difference]: Finished difference Result 11850 states and 13229 transitions. [2021-10-28 09:45:02,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-28 09:45:02,599 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 3.9375) internal successors, (189), 47 states have internal predecessors, (189), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2021-10-28 09:45:02,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:02,607 INFO L225 Difference]: With dead ends: 11850 [2021-10-28 09:45:02,607 INFO L226 Difference]: Without dead ends: 11362 [2021-10-28 09:45:02,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=312, Invalid=4380, Unknown=0, NotChecked=0, Total=4692 [2021-10-28 09:45:02,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11362 states. [2021-10-28 09:45:02,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11362 to 10427. [2021-10-28 09:45:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10427 states, 10395 states have (on average 1.127946127946128) internal successors, (11725), 10399 states have internal predecessors, (11725), 26 states have call successors, (26), 26 states have call predecessors, (26), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:45:02,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10427 states to 10427 states and 11752 transitions. [2021-10-28 09:45:02,705 INFO L78 Accepts]: Start accepts. Automaton has 10427 states and 11752 transitions. Word has length 131 [2021-10-28 09:45:02,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:02,705 INFO L470 AbstractCegarLoop]: Abstraction has 10427 states and 11752 transitions. [2021-10-28 09:45:02,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 3.9375) internal successors, (189), 47 states have internal predecessors, (189), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:45:02,705 INFO L276 IsEmpty]: Start isEmpty. Operand 10427 states and 11752 transitions. [2021-10-28 09:45:02,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-10-28 09:45:02,711 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:02,711 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:02,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:02,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:02,912 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:45:02,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:02,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1797686646, now seen corresponding path program 20 times [2021-10-28 09:45:02,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:02,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220549420] [2021-10-28 09:45:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:02,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:03,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:45:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 153 proven. 419 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:45:03,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:03,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220549420] [2021-10-28 09:45:03,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220549420] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:03,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879073173] [2021-10-28 09:45:03,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:45:03,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:03,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:03,671 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:03,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-28 09:45:05,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:45:05,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:05,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 70 conjunts are in the unsatisfiable core [2021-10-28 09:45:05,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:06,792 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 190 proven. 382 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:45:06,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879073173] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:06,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:06,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 47 [2021-10-28 09:45:06,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897269679] [2021-10-28 09:45:06,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-28 09:45:06,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:06,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-28 09:45:06,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1976, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 09:45:06,794 INFO L87 Difference]: Start difference. First operand 10427 states and 11752 transitions. Second operand has 48 states, 45 states have (on average 4.377777777777778) internal successors, (197), 45 states have internal predecessors, (197), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:45:09,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:09,662 INFO L93 Difference]: Finished difference Result 11896 states and 13289 transitions. [2021-10-28 09:45:09,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 09:45:09,663 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 4.377777777777778) internal successors, (197), 45 states have internal predecessors, (197), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2021-10-28 09:45:09,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:09,671 INFO L225 Difference]: With dead ends: 11896 [2021-10-28 09:45:09,671 INFO L226 Difference]: Without dead ends: 11894 [2021-10-28 09:45:09,671 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=443, Invalid=3463, Unknown=0, NotChecked=0, Total=3906 [2021-10-28 09:45:09,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11894 states. [2021-10-28 09:45:09,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11894 to 10571. [2021-10-28 09:45:09,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10571 states, 10539 states have (on average 1.1283803017364076) internal successors, (11892), 10543 states have internal predecessors, (11892), 26 states have call successors, (26), 26 states have call predecessors, (26), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:45:09,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10571 states to 10571 states and 11919 transitions. [2021-10-28 09:45:09,796 INFO L78 Accepts]: Start accepts. Automaton has 10571 states and 11919 transitions. Word has length 135 [2021-10-28 09:45:09,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:09,797 INFO L470 AbstractCegarLoop]: Abstraction has 10571 states and 11919 transitions. [2021-10-28 09:45:09,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 4.377777777777778) internal successors, (197), 45 states have internal predecessors, (197), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:45:09,797 INFO L276 IsEmpty]: Start isEmpty. Operand 10571 states and 11919 transitions. [2021-10-28 09:45:09,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-10-28 09:45:09,803 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:09,803 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:09,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:10,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-10-28 09:45:10,004 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:45:10,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:10,004 INFO L85 PathProgramCache]: Analyzing trace with hash 217606373, now seen corresponding path program 3 times [2021-10-28 09:45:10,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:10,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570211157] [2021-10-28 09:45:10,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:10,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:10,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:45:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 103 proven. 209 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-28 09:45:10,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:10,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570211157] [2021-10-28 09:45:10,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570211157] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:10,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272321393] [2021-10-28 09:45:10,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:45:10,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:10,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:10,532 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:10,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-28 09:45:12,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-28 09:45:12,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:12,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-28 09:45:12,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:13,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 09:45:13,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-28 09:45:13,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 09:45:13,496 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-10-28 09:45:13,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-10-28 09:45:18,234 INFO L354 Elim1Store]: treesize reduction 42, result has 57.6 percent of original size [2021-10-28 09:45:18,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 57 treesize of output 83 [2021-10-28 09:45:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 87 proven. 16 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-10-28 09:45:18,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272321393] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:18,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:18,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 33 [2021-10-28 09:45:18,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385661038] [2021-10-28 09:45:18,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-28 09:45:18,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:18,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-28 09:45:18,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=984, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 09:45:18,429 INFO L87 Difference]: Start difference. First operand 10571 states and 11919 transitions. Second operand has 33 states, 32 states have (on average 5.15625) internal successors, (165), 30 states have internal predecessors, (165), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:01,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:01,373 INFO L93 Difference]: Finished difference Result 9571 states and 10647 transitions. [2021-10-28 09:49:01,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-10-28 09:49:01,374 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 5.15625) internal successors, (165), 30 states have internal predecessors, (165), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2021-10-28 09:49:01,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:01,376 INFO L225 Difference]: With dead ends: 9571 [2021-10-28 09:49:01,376 INFO L226 Difference]: Without dead ends: 2522 [2021-10-28 09:49:01,377 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4354 ImplicationChecksByTransitivity, 206.4s TimeCoverageRelationStatistics Valid=1068, Invalid=14933, Unknown=1, NotChecked=0, Total=16002 [2021-10-28 09:49:01,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2021-10-28 09:49:01,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 801. [2021-10-28 09:49:01,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 790 states have (on average 1.1265822784810127) internal successors, (890), 792 states have internal predecessors, (890), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:01,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 898 transitions. [2021-10-28 09:49:01,388 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 898 transitions. Word has length 135 [2021-10-28 09:49:01,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:01,388 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 898 transitions. [2021-10-28 09:49:01,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 5.15625) internal successors, (165), 30 states have internal predecessors, (165), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:01,389 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 898 transitions. [2021-10-28 09:49:01,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-10-28 09:49:01,390 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:01,390 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:01,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:01,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-10-28 09:49:01,594 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:49:01,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:01,594 INFO L85 PathProgramCache]: Analyzing trace with hash 833496522, now seen corresponding path program 21 times [2021-10-28 09:49:01,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:01,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178477914] [2021-10-28 09:49:01,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:01,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:02,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:02,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:02,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178477914] [2021-10-28 09:49:02,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178477914] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:02,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116614897] [2021-10-28 09:49:02,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:49:02,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:02,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:02,350 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:02,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-28 09:49:04,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-10-28 09:49:04,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:49:05,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 90 conjunts are in the unsatisfiable core [2021-10-28 09:49:05,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:05,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:49:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:06,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116614897] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:06,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:06,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33] total 55 [2021-10-28 09:49:06,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135005562] [2021-10-28 09:49:06,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-10-28 09:49:06,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:06,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-10-28 09:49:06,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2823, Unknown=0, NotChecked=0, Total=2970 [2021-10-28 09:49:06,156 INFO L87 Difference]: Start difference. First operand 801 states and 898 transitions. Second operand has 55 states, 53 states have (on average 3.8867924528301887) internal successors, (206), 52 states have internal predecessors, (206), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:09,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:09,948 INFO L93 Difference]: Finished difference Result 1567 states and 1718 transitions. [2021-10-28 09:49:09,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-28 09:49:09,948 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 3.8867924528301887) internal successors, (206), 52 states have internal predecessors, (206), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2021-10-28 09:49:09,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:09,949 INFO L225 Difference]: With dead ends: 1567 [2021-10-28 09:49:09,949 INFO L226 Difference]: Without dead ends: 836 [2021-10-28 09:49:09,950 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=341, Invalid=5209, Unknown=0, NotChecked=0, Total=5550 [2021-10-28 09:49:09,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-10-28 09:49:09,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 821. [2021-10-28 09:49:09,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 810 states have (on average 1.123456790123457) internal successors, (910), 812 states have internal predecessors, (910), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:09,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 918 transitions. [2021-10-28 09:49:09,956 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 918 transitions. Word has length 141 [2021-10-28 09:49:09,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:09,956 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 918 transitions. [2021-10-28 09:49:09,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 3.8867924528301887) internal successors, (206), 52 states have internal predecessors, (206), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:09,956 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 918 transitions. [2021-10-28 09:49:09,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-10-28 09:49:09,957 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:09,957 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:09,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:10,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:10,158 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:49:10,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:10,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1537356531, now seen corresponding path program 22 times [2021-10-28 09:49:10,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:10,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177245739] [2021-10-28 09:49:10,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:10,159 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:10,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 494 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:10,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:10,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177245739] [2021-10-28 09:49:10,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177245739] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:10,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765656974] [2021-10-28 09:49:10,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:49:10,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:10,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:10,874 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:10,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-28 09:49:13,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:49:13,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:49:13,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 84 conjunts are in the unsatisfiable core [2021-10-28 09:49:13,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:13,353 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:49:13,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:49:13,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 09:49:15,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:49:15,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-10-28 09:49:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 242 proven. 442 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:15,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765656974] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:15,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:15,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 35] total 54 [2021-10-28 09:49:15,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702109263] [2021-10-28 09:49:15,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-10-28 09:49:15,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:15,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-10-28 09:49:15,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2774, Unknown=0, NotChecked=0, Total=2970 [2021-10-28 09:49:15,775 INFO L87 Difference]: Start difference. First operand 821 states and 918 transitions. Second operand has 55 states, 52 states have (on average 4.461538461538462) internal successors, (232), 52 states have internal predecessors, (232), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:20,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:20,190 INFO L93 Difference]: Finished difference Result 1179 states and 1287 transitions. [2021-10-28 09:49:20,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-28 09:49:20,190 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 4.461538461538462) internal successors, (232), 52 states have internal predecessors, (232), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2021-10-28 09:49:20,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:20,192 INFO L225 Difference]: With dead ends: 1179 [2021-10-28 09:49:20,192 INFO L226 Difference]: Without dead ends: 1177 [2021-10-28 09:49:20,193 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=430, Invalid=4972, Unknown=0, NotChecked=0, Total=5402 [2021-10-28 09:49:20,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-10-28 09:49:20,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 857. [2021-10-28 09:49:20,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 846 states have (on average 1.124113475177305) internal successors, (951), 848 states have internal predecessors, (951), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:20,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 959 transitions. [2021-10-28 09:49:20,207 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 959 transitions. Word has length 145 [2021-10-28 09:49:20,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:20,208 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 959 transitions. [2021-10-28 09:49:20,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 4.461538461538462) internal successors, (232), 52 states have internal predecessors, (232), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:20,208 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 959 transitions. [2021-10-28 09:49:20,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-10-28 09:49:20,210 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:20,210 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:20,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:20,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-10-28 09:49:20,438 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:49:20,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:20,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1944133665, now seen corresponding path program 23 times [2021-10-28 09:49:20,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:20,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724451559] [2021-10-28 09:49:20,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:20,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:21,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:21,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:21,258 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:21,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:21,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724451559] [2021-10-28 09:49:21,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724451559] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:21,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731459533] [2021-10-28 09:49:21,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:49:21,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:21,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:21,262 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:21,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-28 09:49:24,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-10-28 09:49:24,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:49:24,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 90 conjunts are in the unsatisfiable core [2021-10-28 09:49:24,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:24,254 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:49:24,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:49:25,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 09:49:26,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:49:26,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-10-28 09:49:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 231 proven. 526 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:27,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731459533] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:27,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:27,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35] total 71 [2021-10-28 09:49:27,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398869466] [2021-10-28 09:49:27,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-10-28 09:49:27,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:27,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-10-28 09:49:27,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=4718, Unknown=0, NotChecked=0, Total=4970 [2021-10-28 09:49:27,113 INFO L87 Difference]: Start difference. First operand 857 states and 959 transitions. Second operand has 71 states, 69 states have (on average 4.202898550724638) internal successors, (290), 68 states have internal predecessors, (290), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:33,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:33,586 INFO L93 Difference]: Finished difference Result 2067 states and 2239 transitions. [2021-10-28 09:49:33,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-10-28 09:49:33,587 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 69 states have (on average 4.202898550724638) internal successors, (290), 68 states have internal predecessors, (290), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2021-10-28 09:49:33,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:33,589 INFO L225 Difference]: With dead ends: 2067 [2021-10-28 09:49:33,589 INFO L226 Difference]: Without dead ends: 1273 [2021-10-28 09:49:33,591 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3705 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=930, Invalid=15072, Unknown=0, NotChecked=0, Total=16002 [2021-10-28 09:49:33,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-10-28 09:49:33,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 913. [2021-10-28 09:49:33,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 902 states have (on average 1.1219512195121952) internal successors, (1012), 904 states have internal predecessors, (1012), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:33,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1020 transitions. [2021-10-28 09:49:33,608 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1020 transitions. Word has length 151 [2021-10-28 09:49:33,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:33,609 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 1020 transitions. [2021-10-28 09:49:33,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 69 states have (on average 4.202898550724638) internal successors, (290), 68 states have internal predecessors, (290), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:33,609 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1020 transitions. [2021-10-28 09:49:33,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-10-28 09:49:33,611 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:33,612 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:33,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:33,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-10-28 09:49:33,838 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:49:33,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:33,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1028494712, now seen corresponding path program 24 times [2021-10-28 09:49:33,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:33,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276760168] [2021-10-28 09:49:33,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:33,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:34,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:34,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:34,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276760168] [2021-10-28 09:49:34,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276760168] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:34,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832769430] [2021-10-28 09:49:34,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:49:34,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:34,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:34,719 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:34,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-28 09:49:37,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-10-28 09:49:37,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:49:37,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 74 conjunts are in the unsatisfiable core [2021-10-28 09:49:37,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:37,969 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:49:37,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:49:39,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 09:49:41,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:49:41,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-10-28 09:49:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 521 proven. 364 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:41,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832769430] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:41,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:41,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 75 [2021-10-28 09:49:41,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123016593] [2021-10-28 09:49:41,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-10-28 09:49:41,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:41,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-10-28 09:49:41,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=5186, Unknown=0, NotChecked=0, Total=5550 [2021-10-28 09:49:41,563 INFO L87 Difference]: Start difference. First operand 913 states and 1020 transitions. Second operand has 75 states, 73 states have (on average 4.205479452054795) internal successors, (307), 72 states have internal predecessors, (307), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:48,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:48,558 INFO L93 Difference]: Finished difference Result 1801 states and 1972 transitions. [2021-10-28 09:49:48,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-28 09:49:48,559 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 73 states have (on average 4.205479452054795) internal successors, (307), 72 states have internal predecessors, (307), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2021-10-28 09:49:48,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:48,560 INFO L225 Difference]: With dead ends: 1801 [2021-10-28 09:49:48,560 INFO L226 Difference]: Without dead ends: 948 [2021-10-28 09:49:48,561 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3208 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=912, Invalid=11520, Unknown=0, NotChecked=0, Total=12432 [2021-10-28 09:49:48,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2021-10-28 09:49:48,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 933. [2021-10-28 09:49:48,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 922 states have (on average 1.119305856832972) internal successors, (1032), 924 states have internal predecessors, (1032), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:48,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1040 transitions. [2021-10-28 09:49:48,567 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1040 transitions. Word has length 161 [2021-10-28 09:49:48,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:48,567 INFO L470 AbstractCegarLoop]: Abstraction has 933 states and 1040 transitions. [2021-10-28 09:49:48,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 73 states have (on average 4.205479452054795) internal successors, (307), 72 states have internal predecessors, (307), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:48,568 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1040 transitions. [2021-10-28 09:49:48,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-10-28 09:49:48,569 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:48,569 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:48,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:48,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:48,770 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:49:48,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:48,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1767113413, now seen corresponding path program 25 times [2021-10-28 09:49:48,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:48,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106331372] [2021-10-28 09:49:48,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:48,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:49,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:49,712 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 276 proven. 662 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:49,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:49,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106331372] [2021-10-28 09:49:49,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106331372] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:49,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190617647] [2021-10-28 09:49:49,712 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:49:49,713 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:49,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:49,718 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:49,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-28 09:49:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:52,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 85 conjunts are in the unsatisfiable core [2021-10-28 09:49:52,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:53,845 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 325 proven. 613 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:53,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190617647] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:53,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:53,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 56 [2021-10-28 09:49:53,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912248517] [2021-10-28 09:49:53,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-10-28 09:49:53,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:53,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-10-28 09:49:53,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=2783, Unknown=0, NotChecked=0, Total=3192 [2021-10-28 09:49:53,847 INFO L87 Difference]: Start difference. First operand 933 states and 1040 transitions. Second operand has 57 states, 54 states have (on average 4.425925925925926) internal successors, (239), 54 states have internal predecessors, (239), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:57,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:57,150 INFO L93 Difference]: Finished difference Result 1341 states and 1459 transitions. [2021-10-28 09:49:57,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-28 09:49:57,150 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 4.425925925925926) internal successors, (239), 54 states have internal predecessors, (239), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2021-10-28 09:49:57,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:57,151 INFO L225 Difference]: With dead ends: 1341 [2021-10-28 09:49:57,151 INFO L226 Difference]: Without dead ends: 1339 [2021-10-28 09:49:57,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=608, Invalid=4942, Unknown=0, NotChecked=0, Total=5550 [2021-10-28 09:49:57,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2021-10-28 09:49:57,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 969. [2021-10-28 09:49:57,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 958 states have (on average 1.1200417536534446) internal successors, (1073), 960 states have internal predecessors, (1073), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:57,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1081 transitions. [2021-10-28 09:49:57,166 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1081 transitions. Word has length 165 [2021-10-28 09:49:57,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:57,166 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1081 transitions. [2021-10-28 09:49:57,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 4.425925925925926) internal successors, (239), 54 states have internal predecessors, (239), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:57,166 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1081 transitions. [2021-10-28 09:49:57,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-10-28 09:49:57,168 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:57,168 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:57,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:57,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-10-28 09:49:57,368 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:49:57,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:57,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1607862833, now seen corresponding path program 26 times [2021-10-28 09:49:57,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:57,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297867366] [2021-10-28 09:49:57,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:57,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:58,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:58,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 57 proven. 966 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:58,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:58,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297867366] [2021-10-28 09:49:58,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297867366] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:58,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695996695] [2021-10-28 09:49:58,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:49:58,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:58,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:58,346 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:58,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-28 09:50:01,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:50:01,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:50:01,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 106 conjunts are in the unsatisfiable core [2021-10-28 09:50:01,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:50:01,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:50:02,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 09:50:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 57 proven. 966 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:50:02,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695996695] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:50:02,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:50:02,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39] total 62 [2021-10-28 09:50:02,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746749833] [2021-10-28 09:50:02,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-10-28 09:50:02,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:50:02,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-10-28 09:50:02,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3619, Unknown=0, NotChecked=0, Total=3782 [2021-10-28 09:50:02,626 INFO L87 Difference]: Start difference. First operand 969 states and 1081 transitions. Second operand has 62 states, 60 states have (on average 4.083333333333333) internal successors, (245), 59 states have internal predecessors, (245), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:50:07,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:50:07,784 INFO L93 Difference]: Finished difference Result 1918 states and 2099 transitions. [2021-10-28 09:50:07,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-28 09:50:07,798 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 60 states have (on average 4.083333333333333) internal successors, (245), 59 states have internal predecessors, (245), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2021-10-28 09:50:07,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:50:07,799 INFO L225 Difference]: With dead ends: 1918 [2021-10-28 09:50:07,799 INFO L226 Difference]: Without dead ends: 1004 [2021-10-28 09:50:07,800 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=384, Invalid=6756, Unknown=0, NotChecked=0, Total=7140 [2021-10-28 09:50:07,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2021-10-28 09:50:07,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 989. [2021-10-28 09:50:07,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 978 states have (on average 1.1175869120654396) internal successors, (1093), 980 states have internal predecessors, (1093), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:50:07,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1101 transitions. [2021-10-28 09:50:07,807 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1101 transitions. Word has length 171 [2021-10-28 09:50:07,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:50:07,808 INFO L470 AbstractCegarLoop]: Abstraction has 989 states and 1101 transitions. [2021-10-28 09:50:07,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 60 states have (on average 4.083333333333333) internal successors, (245), 59 states have internal predecessors, (245), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:50:07,808 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1101 transitions. [2021-10-28 09:50:07,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-10-28 09:50:07,809 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:50:07,810 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:50:07,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-28 09:50:08,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-10-28 09:50:08,010 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:50:08,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:50:08,011 INFO L85 PathProgramCache]: Analyzing trace with hash -903363118, now seen corresponding path program 27 times [2021-10-28 09:50:08,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:50:08,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838461540] [2021-10-28 09:50:08,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:50:08,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:50:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:50:09,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:50:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:50:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 325 proven. 755 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:50:09,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:50:09,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838461540] [2021-10-28 09:50:09,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838461540] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:50:09,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172968453] [2021-10-28 09:50:09,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:50:09,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:50:09,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:50:09,025 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:50:09,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-28 09:50:12,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-10-28 09:50:12,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:50:12,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 78 conjunts are in the unsatisfiable core [2021-10-28 09:50:12,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:50:12,508 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:50:12,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:50:14,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 378 proven. 702 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:50:14,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172968453] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:50:14,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:50:14,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 74 [2021-10-28 09:50:14,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120165074] [2021-10-28 09:50:14,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-10-28 09:50:14,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:50:14,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-10-28 09:50:14,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=4912, Unknown=0, NotChecked=0, Total=5550 [2021-10-28 09:50:14,841 INFO L87 Difference]: Start difference. First operand 989 states and 1101 transitions. Second operand has 75 states, 73 states have (on average 4.63013698630137) internal successors, (338), 72 states have internal predecessors, (338), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:50:18,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:50:18,682 INFO L93 Difference]: Finished difference Result 1422 states and 1545 transitions. [2021-10-28 09:50:18,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-28 09:50:18,683 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 73 states have (on average 4.63013698630137) internal successors, (338), 72 states have internal predecessors, (338), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2021-10-28 09:50:18,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:50:18,684 INFO L225 Difference]: With dead ends: 1422 [2021-10-28 09:50:18,684 INFO L226 Difference]: Without dead ends: 1420 [2021-10-28 09:50:18,685 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2607 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=997, Invalid=7745, Unknown=0, NotChecked=0, Total=8742 [2021-10-28 09:50:18,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-10-28 09:50:18,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1025. [2021-10-28 09:50:18,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1014 states have (on average 1.1183431952662721) internal successors, (1134), 1016 states have internal predecessors, (1134), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:50:18,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1142 transitions. [2021-10-28 09:50:18,698 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1142 transitions. Word has length 175 [2021-10-28 09:50:18,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:50:18,698 INFO L470 AbstractCegarLoop]: Abstraction has 1025 states and 1142 transitions. [2021-10-28 09:50:18,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 73 states have (on average 4.63013698630137) internal successors, (338), 72 states have internal predecessors, (338), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:50:18,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1142 transitions. [2021-10-28 09:50:18,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-10-28 09:50:18,701 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:50:18,701 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:50:18,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-28 09:50:18,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:50:18,902 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:50:18,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:50:18,902 INFO L85 PathProgramCache]: Analyzing trace with hash 494711078, now seen corresponding path program 28 times [2021-10-28 09:50:18,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:50:18,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770454350] [2021-10-28 09:50:18,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:50:18,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:50:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:50:19,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:50:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:50:19,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1172 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:50:19,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:50:19,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770454350] [2021-10-28 09:50:19,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770454350] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:50:19,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394343450] [2021-10-28 09:50:19,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:50:19,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:50:19,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:50:19,982 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:50:20,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-28 09:50:23,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:50:23,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:50:23,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 82 conjunts are in the unsatisfiable core [2021-10-28 09:50:23,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:50:23,291 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:50:23,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:50:24,699 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 15 treesize of output 11 [2021-10-28 09:50:26,464 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-10-28 09:50:26,465 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 34 treesize of output 25 [2021-10-28 09:50:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1172 backedges. 706 proven. 465 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:50:26,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394343450] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:50:26,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:50:26,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 81 [2021-10-28 09:50:26,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340748945] [2021-10-28 09:50:26,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-10-28 09:50:26,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:50:26,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-10-28 09:50:26,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=6010, Unknown=0, NotChecked=0, Total=6480 [2021-10-28 09:50:26,482 INFO L87 Difference]: Start difference. First operand 1025 states and 1142 transitions. Second operand has 81 states, 79 states have (on average 4.3544303797468356) internal successors, (344), 78 states have internal predecessors, (344), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:50:31,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:50:31,893 INFO L93 Difference]: Finished difference Result 2035 states and 2226 transitions. [2021-10-28 09:50:31,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-28 09:50:31,893 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 79 states have (on average 4.3544303797468356) internal successors, (344), 78 states have internal predecessors, (344), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2021-10-28 09:50:31,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:50:31,894 INFO L225 Difference]: With dead ends: 2035 [2021-10-28 09:50:31,894 INFO L226 Difference]: Without dead ends: 1060 [2021-10-28 09:50:31,895 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1108, Invalid=13412, Unknown=0, NotChecked=0, Total=14520 [2021-10-28 09:50:31,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-10-28 09:50:31,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1045. [2021-10-28 09:50:31,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1034 states have (on average 1.11605415860735) internal successors, (1154), 1036 states have internal predecessors, (1154), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:50:31,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1162 transitions. [2021-10-28 09:50:31,903 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1162 transitions. Word has length 181 [2021-10-28 09:50:31,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:50:31,903 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 1162 transitions. [2021-10-28 09:50:31,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 79 states have (on average 4.3544303797468356) internal successors, (344), 78 states have internal predecessors, (344), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:50:31,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1162 transitions. [2021-10-28 09:50:31,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-10-28 09:50:31,905 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:50:31,906 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:50:31,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-10-28 09:50:32,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:50:32,110 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:50:32,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:50:32,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1059363177, now seen corresponding path program 29 times [2021-10-28 09:50:32,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:50:32,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572361222] [2021-10-28 09:50:32,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:50:32,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:50:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:50:33,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:50:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:50:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1233 backedges. 378 proven. 854 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:50:33,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:50:33,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572361222] [2021-10-28 09:50:33,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572361222] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:50:33,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654324994] [2021-10-28 09:50:33,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:50:33,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:50:33,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:50:33,171 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:50:33,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-28 09:50:36,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-10-28 09:50:36,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:50:36,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 101 conjunts are in the unsatisfiable core [2021-10-28 09:50:36,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:50:36,676 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:50:36,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:50:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1233 backedges. 435 proven. 797 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:50:38,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654324994] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:50:38,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:50:38,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 38] total 57 [2021-10-28 09:50:38,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408507090] [2021-10-28 09:50:38,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-10-28 09:50:38,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:50:38,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-10-28 09:50:38,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=3037, Unknown=0, NotChecked=0, Total=3306 [2021-10-28 09:50:38,440 INFO L87 Difference]: Start difference. First operand 1045 states and 1162 transitions. Second operand has 58 states, 57 states have (on average 5.017543859649122) internal successors, (286), 56 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:50:42,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:50:42,324 INFO L93 Difference]: Finished difference Result 1503 states and 1631 transitions. [2021-10-28 09:50:42,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-28 09:50:42,325 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 5.017543859649122) internal successors, (286), 56 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2021-10-28 09:50:42,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:50:42,326 INFO L225 Difference]: With dead ends: 1503 [2021-10-28 09:50:42,326 INFO L226 Difference]: Without dead ends: 1501 [2021-10-28 09:50:42,327 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=452, Invalid=5554, Unknown=0, NotChecked=0, Total=6006 [2021-10-28 09:50:42,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2021-10-28 09:50:42,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1081. [2021-10-28 09:50:42,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1070 states have (on average 1.1168224299065421) internal successors, (1195), 1072 states have internal predecessors, (1195), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:50:42,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1203 transitions. [2021-10-28 09:50:42,340 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1203 transitions. Word has length 185 [2021-10-28 09:50:42,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:50:42,340 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 1203 transitions. [2021-10-28 09:50:42,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 5.017543859649122) internal successors, (286), 56 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:50:42,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1203 transitions. [2021-10-28 09:50:42,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-10-28 09:50:42,343 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:50:42,343 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:50:42,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-10-28 09:50:42,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:50:42,546 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:50:42,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:50:42,546 INFO L85 PathProgramCache]: Analyzing trace with hash -602130563, now seen corresponding path program 30 times [2021-10-28 09:50:42,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:50:42,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040555346] [2021-10-28 09:50:42,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:50:42,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:50:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:50:43,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:50:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:50:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 65 proven. 1264 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:50:43,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:50:43,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040555346] [2021-10-28 09:50:43,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040555346] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:50:43,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877094584] [2021-10-28 09:50:43,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:50:43,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:50:43,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:50:43,691 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:50:43,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-28 09:50:47,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-10-28 09:50:47,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:50:47,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 88 conjunts are in the unsatisfiable core [2021-10-28 09:50:47,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:50:47,789 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:50:47,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:50:49,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 09:50:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 833 proven. 496 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:50:52,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877094584] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:50:52,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:50:52,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 87 [2021-10-28 09:50:52,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923033975] [2021-10-28 09:50:52,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-10-28 09:50:52,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:50:52,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-10-28 09:50:52,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=6949, Unknown=0, NotChecked=0, Total=7482 [2021-10-28 09:50:52,299 INFO L87 Difference]: Start difference. First operand 1081 states and 1203 transitions. Second operand has 87 states, 85 states have (on average 4.317647058823529) internal successors, (367), 84 states have internal predecessors, (367), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:51:00,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:51:00,830 INFO L93 Difference]: Finished difference Result 2152 states and 2353 transitions. [2021-10-28 09:51:00,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-28 09:51:00,830 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 85 states have (on average 4.317647058823529) internal successors, (367), 84 states have internal predecessors, (367), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2021-10-28 09:51:00,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:51:00,831 INFO L225 Difference]: With dead ends: 2152 [2021-10-28 09:51:00,831 INFO L226 Difference]: Without dead ends: 1116 [2021-10-28 09:51:00,832 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4441 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1231, Invalid=15539, Unknown=0, NotChecked=0, Total=16770 [2021-10-28 09:51:00,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-10-28 09:51:00,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1101. [2021-10-28 09:51:00,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1090 states have (on average 1.114678899082569) internal successors, (1215), 1092 states have internal predecessors, (1215), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:51:00,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1223 transitions. [2021-10-28 09:51:00,843 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1223 transitions. Word has length 191 [2021-10-28 09:51:00,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:51:00,843 INFO L470 AbstractCegarLoop]: Abstraction has 1101 states and 1223 transitions. [2021-10-28 09:51:00,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 85 states have (on average 4.317647058823529) internal successors, (367), 84 states have internal predecessors, (367), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:51:00,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1223 transitions. [2021-10-28 09:51:00,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-10-28 09:51:00,844 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:51:00,845 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:51:00,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-28 09:51:01,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:51:01,045 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:51:01,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:51:01,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1831016448, now seen corresponding path program 31 times [2021-10-28 09:51:01,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:51:01,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288761010] [2021-10-28 09:51:01,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:51:01,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:51:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:02,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:51:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:02,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 435 proven. 959 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:51:02,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:51:02,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288761010] [2021-10-28 09:51:02,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288761010] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:51:02,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239728154] [2021-10-28 09:51:02,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:51:02,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:51:02,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:51:02,143 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:51:02,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-28 09:51:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:05,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 100 conjunts are in the unsatisfiable core [2021-10-28 09:51:05,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:51:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 496 proven. 898 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:51:07,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239728154] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:51:07,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:51:07,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 65 [2021-10-28 09:51:07,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566716693] [2021-10-28 09:51:07,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-10-28 09:51:07,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:51:07,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-10-28 09:51:07,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=3725, Unknown=0, NotChecked=0, Total=4290 [2021-10-28 09:51:07,376 INFO L87 Difference]: Start difference. First operand 1101 states and 1223 transitions. Second operand has 66 states, 63 states have (on average 4.4603174603174605) internal successors, (281), 63 states have internal predecessors, (281), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:51:11,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:51:11,250 INFO L93 Difference]: Finished difference Result 1584 states and 1717 transitions. [2021-10-28 09:51:11,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-28 09:51:11,250 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 63 states have (on average 4.4603174603174605) internal successors, (281), 63 states have internal predecessors, (281), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2021-10-28 09:51:11,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:51:11,251 INFO L225 Difference]: With dead ends: 1584 [2021-10-28 09:51:11,252 INFO L226 Difference]: Without dead ends: 1582 [2021-10-28 09:51:11,252 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2264 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=800, Invalid=6682, Unknown=0, NotChecked=0, Total=7482 [2021-10-28 09:51:11,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-10-28 09:51:11,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1137. [2021-10-28 09:51:11,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1126 states have (on average 1.1154529307282415) internal successors, (1256), 1128 states have internal predecessors, (1256), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:51:11,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1264 transitions. [2021-10-28 09:51:11,265 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1264 transitions. Word has length 195 [2021-10-28 09:51:11,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:51:11,265 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 1264 transitions. [2021-10-28 09:51:11,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 63 states have (on average 4.4603174603174605) internal successors, (281), 63 states have internal predecessors, (281), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:51:11,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1264 transitions. [2021-10-28 09:51:11,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-10-28 09:51:11,267 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:51:11,267 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:51:11,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-10-28 09:51:11,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:51:11,470 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:51:11,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:51:11,470 INFO L85 PathProgramCache]: Analyzing trace with hash -542181164, now seen corresponding path program 32 times [2021-10-28 09:51:11,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:51:11,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755821544] [2021-10-28 09:51:11,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:51:11,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:51:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:12,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:51:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:12,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 69 proven. 1428 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:51:12,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:51:12,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755821544] [2021-10-28 09:51:12,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755821544] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:51:12,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711364845] [2021-10-28 09:51:12,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:51:12,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:51:12,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:51:12,587 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:51:12,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-28 09:51:16,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:51:16,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:51:16,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 124 conjunts are in the unsatisfiable core [2021-10-28 09:51:16,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:51:17,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:51:17,849 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 15 treesize of output 7 [2021-10-28 09:51:17,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 69 proven. 1428 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:51:17,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711364845] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:51:17,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:51:17,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 45] total 71 [2021-10-28 09:51:17,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665997610] [2021-10-28 09:51:17,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-10-28 09:51:17,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:51:17,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-10-28 09:51:17,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=4783, Unknown=0, NotChecked=0, Total=4970 [2021-10-28 09:51:17,864 INFO L87 Difference]: Start difference. First operand 1137 states and 1264 transitions. Second operand has 71 states, 69 states have (on average 4.159420289855072) internal successors, (287), 68 states have internal predecessors, (287), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:51:24,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:51:24,387 INFO L93 Difference]: Finished difference Result 2269 states and 2480 transitions. [2021-10-28 09:51:24,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-28 09:51:24,388 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 69 states have (on average 4.159420289855072) internal successors, (287), 68 states have internal predecessors, (287), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2021-10-28 09:51:24,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:51:24,388 INFO L225 Difference]: With dead ends: 2269 [2021-10-28 09:51:24,388 INFO L226 Difference]: Without dead ends: 1172 [2021-10-28 09:51:24,389 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=438, Invalid=8874, Unknown=0, NotChecked=0, Total=9312 [2021-10-28 09:51:24,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-10-28 09:51:24,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1157. [2021-10-28 09:51:24,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1146 states have (on average 1.1134380453752182) internal successors, (1276), 1148 states have internal predecessors, (1276), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:51:24,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1284 transitions. [2021-10-28 09:51:24,400 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1284 transitions. Word has length 201 [2021-10-28 09:51:24,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:51:24,400 INFO L470 AbstractCegarLoop]: Abstraction has 1157 states and 1284 transitions. [2021-10-28 09:51:24,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 69 states have (on average 4.159420289855072) internal successors, (287), 68 states have internal predecessors, (287), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:51:24,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1284 transitions. [2021-10-28 09:51:24,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-10-28 09:51:24,402 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:51:24,403 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:51:24,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-28 09:51:24,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-10-28 09:51:24,618 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 09:51:24,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:51:24,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1839521385, now seen corresponding path program 33 times [2021-10-28 09:51:24,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:51:24,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455879543] [2021-10-28 09:51:24,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:51:24,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:51:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:25,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:51:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1567 backedges. 496 proven. 1070 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:51:25,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:51:25,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455879543] [2021-10-28 09:51:25,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455879543] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:51:25,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852702817] [2021-10-28 09:51:25,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:51:25,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:51:25,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:51:25,672 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:51:25,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-28 09:51:30,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-10-28 09:51:30,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:51:30,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-28 09:51:30,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:51:30,435 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:51:30,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:51:30,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 09:51:32,592 INFO L354 Elim1Store]: treesize reduction 3, result has 76.9 percent of original size [2021-10-28 09:51:32,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 24 [2021-10-28 09:51:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1567 backedges. 51 proven. 52 refuted. 0 times theorem prover too weak. 1464 trivial. 0 not checked. [2021-10-28 09:51:32,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852702817] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:51:32,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:51:32,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 11] total 54 [2021-10-28 09:51:32,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696876167] [2021-10-28 09:51:32,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-10-28 09:51:32,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:51:32,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-10-28 09:51:32,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=2648, Unknown=0, NotChecked=0, Total=2970 [2021-10-28 09:51:32,696 INFO L87 Difference]: Start difference. First operand 1157 states and 1284 transitions. Second operand has 55 states, 52 states have (on average 4.5) internal successors, (234), 52 states have internal predecessors, (234), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:51:44,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:51:44,176 INFO L93 Difference]: Finished difference Result 1608 states and 1719 transitions. [2021-10-28 09:51:44,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-10-28 09:51:44,176 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 4.5) internal successors, (234), 52 states have internal predecessors, (234), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2021-10-28 09:51:44,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:51:44,177 INFO L225 Difference]: With dead ends: 1608 [2021-10-28 09:51:44,177 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 09:51:44,179 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9419 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=2270, Invalid=27486, Unknown=0, NotChecked=0, Total=29756 [2021-10-28 09:51:44,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 09:51:44,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 09:51:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:51:44,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 09:51:44,179 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 205 [2021-10-28 09:51:44,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:51:44,180 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:51:44,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 4.5) internal successors, (234), 52 states have internal predecessors, (234), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:51:44,180 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 09:51:44,180 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 09:51:44,182 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-28 09:51:44,182 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-28 09:51:44,182 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-28 09:51:44,182 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-28 09:51:44,182 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION [2021-10-28 09:51:44,182 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION [2021-10-28 09:51:44,182 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION [2021-10-28 09:51:44,182 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION [2021-10-28 09:51:44,182 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 09:51:44,183 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrspnErr0REQUIRES_VIOLATION [2021-10-28 09:51:44,183 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrspnErr1REQUIRES_VIOLATION [2021-10-28 09:51:44,183 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrspnErr2REQUIRES_VIOLATION [2021-10-28 09:51:44,183 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrspnErr3REQUIRES_VIOLATION [2021-10-28 09:51:44,183 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrspnErr4REQUIRES_VIOLATION [2021-10-28 09:51:44,183 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrspnErr5REQUIRES_VIOLATION [2021-10-28 09:51:44,183 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrspnErr6REQUIRES_VIOLATION [2021-10-28 09:51:44,183 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrspnErr7REQUIRES_VIOLATION [2021-10-28 09:51:44,184 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrspnErr8REQUIRES_VIOLATION [2021-10-28 09:51:44,184 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrspnErr9REQUIRES_VIOLATION [2021-10-28 09:51:44,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-10-28 09:51:44,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:51:44,387 INFO L731 BasicCegarLoop]: Path program histogram: [33, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:51:44,389 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:51:44,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:51:44 BoogieIcfgContainer [2021-10-28 09:51:44,392 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:51:44,392 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:51:44,392 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:51:44,392 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:51:44,393 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:39:33" (3/4) ... [2021-10-28 09:51:44,396 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 09:51:44,402 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 09:51:44,402 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-28 09:51:44,403 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-28 09:51:44,403 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-10-28 09:51:44,403 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-10-28 09:51:44,403 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 09:51:44,403 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrspn [2021-10-28 09:51:44,403 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-10-28 09:51:44,421 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-10-28 09:51:44,423 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-28 09:51:44,423 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:51:44,423 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:51:44,458 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:51:44,459 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:51:44,460 INFO L168 Benchmark]: Toolchain (without parser) took 732065.87 ms. Allocated memory was 100.7 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 64.6 MB in the beginning and 652.5 MB in the end (delta: -587.9 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.1 GB. [2021-10-28 09:51:44,460 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 75.5 MB. Free memory was 36.9 MB in the beginning and 36.8 MB in the end (delta: 42.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:51:44,460 INFO L168 Benchmark]: CACSL2BoogieTranslator took 472.19 ms. Allocated memory is still 100.7 MB. Free memory was 64.5 MB in the beginning and 68.3 MB in the end (delta: -3.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:51:44,460 INFO L168 Benchmark]: Boogie Preprocessor took 115.67 ms. Allocated memory is still 100.7 MB. Free memory was 68.3 MB in the beginning and 65.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:51:44,461 INFO L168 Benchmark]: RCFGBuilder took 680.48 ms. Allocated memory is still 100.7 MB. Free memory was 65.9 MB in the beginning and 44.9 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-28 09:51:44,461 INFO L168 Benchmark]: TraceAbstraction took 730724.79 ms. Allocated memory was 100.7 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 44.5 MB in the beginning and 655.9 MB in the end (delta: -611.4 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.1 GB. [2021-10-28 09:51:44,461 INFO L168 Benchmark]: Witness Printer took 66.85 ms. Allocated memory is still 1.9 GB. Free memory was 655.9 MB in the beginning and 652.5 MB in the end (delta: 3.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:51:44,463 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 75.5 MB. Free memory was 36.9 MB in the beginning and 36.8 MB in the end (delta: 42.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 472.19 ms. Allocated memory is still 100.7 MB. Free memory was 64.5 MB in the beginning and 68.3 MB in the end (delta: -3.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 115.67 ms. Allocated memory is still 100.7 MB. Free memory was 68.3 MB in the beginning and 65.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 680.48 ms. Allocated memory is still 100.7 MB. Free memory was 65.9 MB in the beginning and 44.9 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 730724.79 ms. Allocated memory was 100.7 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 44.5 MB in the beginning and 655.9 MB in the end (delta: -611.4 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.1 GB. * Witness Printer took 66.85 ms. Allocated memory is still 1.9 GB. Free memory was 655.9 MB in the beginning and 652.5 MB in the end (delta: 3.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 77 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 730.6s, OverallIterations: 68, TraceHistogramMax: 18, PathProgramHistogramMax: 33, EmptinessCheckTime: 0.1s, AutomataDifference: 533.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 4851 SDtfs, 27987 SDslu, 28447 SDs, 0 SdLazy, 216674 SolverSat, 2794 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 107.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7895 GetRequests, 4509 SyntacticMatches, 34 SemanticMatches, 3352 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71785 ImplicationChecksByTransitivity, 450.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10571occurred in iteration=54, InterpolantAutomatonStates: 1807, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.9s AutomataMinimizationTime, 68 MinimizatonAttempts, 18395 StatesRemovedByMinimization, 59 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 7.2s SatisfiabilityAnalysisTime, 102.2s InterpolantComputationTime, 10835 NumberOfCodeBlocks, 10716 NumberOfCodeBlocksAsserted, 314 NumberOfCheckSat, 10718 ConstructedInterpolants, 833 QuantifiedInterpolants, 119538 SizeOfPredicates, 549 NumberOfNonLiveVariables, 18655 ConjunctsInSsa, 2833 ConjunctsInUnsatCore, 117 InterpolantComputations, 19 PerfectInterpolantSequences, 11232/40527 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 09:51:44,673 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-28 09:51:44,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ba8ce5-c1bc-4841-936a-bb5c08c3b059/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...