./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrcspn-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_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 15fe42cb945ebd9019cc38134c29264613097f232589ff55d01d33d66b19d85f ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 22:54:52,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 22:54:52,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 22:54:52,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 22:54:52,689 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 22:54:52,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 22:54:52,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 22:54:52,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 22:54:52,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 22:54:52,716 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 22:54:52,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 22:54:52,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 22:54:52,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 22:54:52,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 22:54:52,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 22:54:52,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 22:54:52,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 22:54:52,735 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 22:54:52,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 22:54:52,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 22:54:52,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 22:54:52,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 22:54:52,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 22:54:52,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 22:54:52,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 22:54:52,766 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 22:54:52,766 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 22:54:52,769 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 22:54:52,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 22:54:52,771 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 22:54:52,772 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 22:54:52,773 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 22:54:52,776 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 22:54:52,778 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 22:54:52,779 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 22:54:52,780 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 22:54:52,781 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 22:54:52,781 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 22:54:52,781 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 22:54:52,782 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 22:54:52,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 22:54:52,784 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 22:54:52,837 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 22:54:52,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 22:54:52,838 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 22:54:52,846 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 22:54:52,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 22:54:52,848 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 22:54:52,848 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 22:54:52,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 22:54:52,848 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 22:54:52,848 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 22:54:52,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 22:54:52,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 22:54:52,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 22:54:52,850 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 22:54:52,851 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 22:54:52,851 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 22:54:52,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 22:54:52,851 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 22:54:52,851 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 22:54:52,852 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 22:54:52,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 22:54:52,852 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 22:54:52,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 22:54:52,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:54:52,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 22:54:52,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 22:54:52,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 22:54:52,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 22:54:52,854 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 22:54:52,855 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_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 15fe42cb945ebd9019cc38134c29264613097f232589ff55d01d33d66b19d85f [2021-10-28 22:54:53,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 22:54:53,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 22:54:53,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 22:54:53,181 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 22:54:53,182 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 22:54:53,183 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i [2021-10-28 22:54:53,260 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/data/83b76ddd9/5f6cc9ea5fab4be2b0234de0380ede89/FLAGc692694b9 [2021-10-28 22:54:53,999 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 22:54:54,000 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i [2021-10-28 22:54:54,015 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/data/83b76ddd9/5f6cc9ea5fab4be2b0234de0380ede89/FLAGc692694b9 [2021-10-28 22:54:54,245 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/data/83b76ddd9/5f6cc9ea5fab4be2b0234de0380ede89 [2021-10-28 22:54:54,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 22:54:54,250 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 22:54:54,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 22:54:54,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 22:54:54,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 22:54:54,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:54:54" (1/1) ... [2021-10-28 22:54:54,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d4937dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:54:54, skipping insertion in model container [2021-10-28 22:54:54,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:54:54" (1/1) ... [2021-10-28 22:54:54,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 22:54:54,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 22:54:54,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:54:54,698 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 22:54:54,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:54:54,810 INFO L208 MainTranslator]: Completed translation [2021-10-28 22:54:54,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:54:54 WrapperNode [2021-10-28 22:54:54,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 22:54:54,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 22:54:54,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 22:54:54,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 22:54:54,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:54:54" (1/1) ... [2021-10-28 22:54:54,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:54:54" (1/1) ... [2021-10-28 22:54:54,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:54:54" (1/1) ... [2021-10-28 22:54:54,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:54:54" (1/1) ... [2021-10-28 22:54:54,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:54:54" (1/1) ... [2021-10-28 22:54:54,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:54:54" (1/1) ... [2021-10-28 22:54:54,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:54:54" (1/1) ... [2021-10-28 22:54:54,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 22:54:54,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 22:54:54,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 22:54:54,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 22:54:54,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:54:54" (1/1) ... [2021-10-28 22:54:54,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:54:54,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:54:54,920 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 22:54:54,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 22:54:54,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 22:54:54,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 22:54:54,961 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 22:54:54,961 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 22:54:54,961 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 22:54:54,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 22:54:54,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 22:54:54,962 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrcspn [2021-10-28 22:54:54,962 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 22:54:54,962 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 22:54:54,963 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 22:54:54,963 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 22:54:54,963 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 22:54:54,963 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 22:54:54,963 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 22:54:54,964 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 22:54:54,964 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 22:54:54,964 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 22:54:54,964 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 22:54:54,964 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 22:54:54,964 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 22:54:54,965 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 22:54:54,965 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 22:54:54,965 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 22:54:54,965 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 22:54:54,965 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 22:54:54,966 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 22:54:54,966 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 22:54:54,966 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 22:54:54,966 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 22:54:54,966 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 22:54:54,966 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 22:54:54,967 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 22:54:54,967 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 22:54:54,967 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 22:54:54,967 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 22:54:54,967 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 22:54:54,968 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 22:54:54,968 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 22:54:54,968 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 22:54:54,968 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 22:54:54,968 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 22:54:54,968 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 22:54:54,969 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 22:54:54,969 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 22:54:54,969 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 22:54:54,969 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 22:54:54,969 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 22:54:54,969 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 22:54:54,970 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 22:54:54,970 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 22:54:54,970 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 22:54:54,970 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 22:54:54,970 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 22:54:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 22:54:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 22:54:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 22:54:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 22:54:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 22:54:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 22:54:54,972 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 22:54:54,972 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 22:54:54,972 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 22:54:54,972 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 22:54:54,972 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 22:54:54,973 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 22:54:54,973 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 22:54:54,973 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 22:54:54,973 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 22:54:54,973 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 22:54:54,973 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 22:54:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 22:54:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 22:54:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 22:54:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 22:54:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 22:54:54,975 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 22:54:54,975 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 22:54:54,975 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 22:54:54,975 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 22:54:54,975 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 22:54:54,975 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 22:54:54,976 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 22:54:54,976 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 22:54:54,976 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 22:54:54,976 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 22:54:54,976 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 22:54:54,977 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 22:54:54,977 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 22:54:54,977 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 22:54:54,977 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 22:54:54,977 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 22:54:54,977 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 22:54:54,978 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 22:54:54,978 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 22:54:54,978 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 22:54:54,978 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 22:54:54,978 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 22:54:54,978 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 22:54:54,979 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 22:54:54,979 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 22:54:54,979 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 22:54:54,979 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 22:54:54,979 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 22:54:54,979 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 22:54:54,980 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 22:54:54,980 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 22:54:54,980 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 22:54:54,980 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 22:54:54,980 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 22:54:54,980 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 22:54:54,981 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 22:54:54,981 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 22:54:54,981 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 22:54:54,981 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 22:54:54,981 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 22:54:54,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 22:54:54,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-28 22:54:54,982 INFO L130 BoogieDeclarations]: Found specification of procedure cstrcspn [2021-10-28 22:54:54,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 22:54:54,982 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 22:54:54,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 22:54:54,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 22:54:54,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 22:54:54,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 22:54:54,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 22:54:55,597 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 22:54:55,598 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-28 22:54:55,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:54:55 BoogieIcfgContainer [2021-10-28 22:54:55,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 22:54:55,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 22:54:55,612 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 22:54:55,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 22:54:55,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:54:54" (1/3) ... [2021-10-28 22:54:55,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f246bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:54:55, skipping insertion in model container [2021-10-28 22:54:55,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:54:54" (2/3) ... [2021-10-28 22:54:55,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f246bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:54:55, skipping insertion in model container [2021-10-28 22:54:55,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:54:55" (3/3) ... [2021-10-28 22:54:55,624 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrcspn-alloca-1.i [2021-10-28 22:54:55,639 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 22:54:55,640 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-10-28 22:54:55,714 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 22:54:55,725 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 22:54:55,725 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-10-28 22:54:55,755 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 22:54:55,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 22:54:55,765 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:54:55,766 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:54:55,767 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:54:55,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:54:55,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1274980559, now seen corresponding path program 1 times [2021-10-28 22:54:55,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:54:55,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608839406] [2021-10-28 22:54:55,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:55,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:54:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:56,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:54:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:54:56,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:54:56,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608839406] [2021-10-28 22:54:56,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608839406] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:54:56,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:54:56,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 22:54:56,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554627569] [2021-10-28 22:54:56,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:54:56,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:54:56,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:54:56,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:54:56,149 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 22:54:56,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:54:56,430 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2021-10-28 22:54:56,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:54:56,432 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 22:54:56,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:54:56,442 INFO L225 Difference]: With dead ends: 83 [2021-10-28 22:54:56,442 INFO L226 Difference]: Without dead ends: 79 [2021-10-28 22:54:56,444 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 22:54:56,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-28 22:54:56,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2021-10-28 22:54:56,485 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 22:54:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-10-28 22:54:56,489 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 11 [2021-10-28 22:54:56,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:54:56,490 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-10-28 22:54:56,490 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 22:54:56,490 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-10-28 22:54:56,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 22:54:56,491 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:54:56,491 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:54:56,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 22:54:56,492 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:54:56,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:54:56,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1276827601, now seen corresponding path program 1 times [2021-10-28 22:54:56,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:54:56,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109188283] [2021-10-28 22:54:56,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:56,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:54:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:56,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:54:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:54:56,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:54:56,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109188283] [2021-10-28 22:54:56,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109188283] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:54:56,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:54:56,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 22:54:56,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781551204] [2021-10-28 22:54:56,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:54:56,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:54:56,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:54:56,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:54:56,658 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 22:54:56,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:54:56,881 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2021-10-28 22:54:56,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:54:56,882 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 22:54:56,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:54:56,884 INFO L225 Difference]: With dead ends: 84 [2021-10-28 22:54:56,884 INFO L226 Difference]: Without dead ends: 84 [2021-10-28 22:54:56,885 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 22:54:56,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-28 22:54:56,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 64. [2021-10-28 22:54:56,891 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 22:54:56,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-10-28 22:54:56,894 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 11 [2021-10-28 22:54:56,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:54:56,894 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-10-28 22:54:56,894 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 22:54:56,895 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-10-28 22:54:56,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 22:54:56,895 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:54:56,896 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:54:56,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 22:54:56,896 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:54:56,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:54:56,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1276827600, now seen corresponding path program 1 times [2021-10-28 22:54:56,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:54:56,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797354712] [2021-10-28 22:54:56,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:56,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:54:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:56,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:54:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:54:56,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:54:56,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797354712] [2021-10-28 22:54:56,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797354712] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:54:56,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:54:56,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 22:54:56,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626629566] [2021-10-28 22:54:56,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:54:56,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:54:56,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:54:56,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:54:56,956 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 22:54:57,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:54:57,101 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-10-28 22:54:57,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 22:54:57,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-28 22:54:57,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:54:57,103 INFO L225 Difference]: With dead ends: 62 [2021-10-28 22:54:57,103 INFO L226 Difference]: Without dead ends: 62 [2021-10-28 22:54:57,104 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:54:57,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-28 22:54:57,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-28 22:54:57,109 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 22:54:57,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-10-28 22:54:57,111 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 11 [2021-10-28 22:54:57,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:54:57,111 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-10-28 22:54:57,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:54:57,111 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-10-28 22:54:57,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 22:54:57,113 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:54:57,113 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:54:57,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 22:54:57,113 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:54:57,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:54:57,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1190586438, now seen corresponding path program 1 times [2021-10-28 22:54:57,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:54:57,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9779892] [2021-10-28 22:54:57,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:57,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:54:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:57,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:54:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:57,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:54:57,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:54:57,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9779892] [2021-10-28 22:54:57,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9779892] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:54:57,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:54:57,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 22:54:57,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653975361] [2021-10-28 22:54:57,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:54:57,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:54:57,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:54:57,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:54:57,229 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 22:54:57,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:54:57,363 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-10-28 22:54:57,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:54:57,364 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 22:54:57,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:54:57,367 INFO L225 Difference]: With dead ends: 61 [2021-10-28 22:54:57,367 INFO L226 Difference]: Without dead ends: 61 [2021-10-28 22:54:57,367 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 22:54:57,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-28 22:54:57,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-10-28 22:54:57,384 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 22:54:57,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-10-28 22:54:57,389 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 13 [2021-10-28 22:54:57,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:54:57,390 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-10-28 22:54:57,390 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 22:54:57,390 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-10-28 22:54:57,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 22:54:57,391 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:54:57,391 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:54:57,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 22:54:57,392 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:54:57,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:54:57,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1190586490, now seen corresponding path program 1 times [2021-10-28 22:54:57,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:54:57,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643224890] [2021-10-28 22:54:57,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:57,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:54:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:57,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:54:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:54:57,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:54:57,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643224890] [2021-10-28 22:54:57,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643224890] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:54:57,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:54:57,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 22:54:57,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96196769] [2021-10-28 22:54:57,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:54:57,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:54:57,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:54:57,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:54:57,480 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 22:54:57,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:54:57,652 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-10-28 22:54:57,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:54:57,653 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 22:54:57,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:54:57,654 INFO L225 Difference]: With dead ends: 81 [2021-10-28 22:54:57,656 INFO L226 Difference]: Without dead ends: 81 [2021-10-28 22:54:57,657 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:54:57,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-28 22:54:57,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-10-28 22:54:57,665 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 22:54:57,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2021-10-28 22:54:57,671 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 13 [2021-10-28 22:54:57,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:54:57,671 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2021-10-28 22:54:57,671 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 22:54:57,672 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2021-10-28 22:54:57,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 22:54:57,673 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:54:57,673 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:54:57,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 22:54:57,673 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:54:57,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:54:57,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1247844792, now seen corresponding path program 1 times [2021-10-28 22:54:57,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:54:57,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580450502] [2021-10-28 22:54:57,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:57,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:54:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:57,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:54:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:54:57,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:54:57,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580450502] [2021-10-28 22:54:57,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580450502] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:54:57,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:54:57,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 22:54:57,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336552847] [2021-10-28 22:54:57,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:54:57,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:54:57,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:54:57,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:54:57,766 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 22:54:57,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:54:57,876 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-10-28 22:54:57,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 22:54:57,877 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 22:54:57,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:54:57,878 INFO L225 Difference]: With dead ends: 70 [2021-10-28 22:54:57,879 INFO L226 Difference]: Without dead ends: 70 [2021-10-28 22:54:57,880 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:54:57,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-28 22:54:57,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-10-28 22:54:57,899 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 22:54:57,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2021-10-28 22:54:57,902 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 13 [2021-10-28 22:54:57,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:54:57,903 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2021-10-28 22:54:57,903 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 22:54:57,903 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2021-10-28 22:54:57,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 22:54:57,904 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:54:57,905 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:54:57,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 22:54:57,905 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:54:57,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:54:57,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1247844793, now seen corresponding path program 1 times [2021-10-28 22:54:57,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:54:57,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876471617] [2021-10-28 22:54:57,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:57,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:54:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:58,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:54:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:54:58,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:54:58,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876471617] [2021-10-28 22:54:58,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876471617] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:54:58,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:54:58,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 22:54:58,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408415020] [2021-10-28 22:54:58,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:54:58,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:54:58,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:54:58,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:54:58,025 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 22:54:58,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:54:58,231 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-10-28 22:54:58,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:54:58,233 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 22:54:58,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:54:58,234 INFO L225 Difference]: With dead ends: 81 [2021-10-28 22:54:58,234 INFO L226 Difference]: Without dead ends: 81 [2021-10-28 22:54:58,234 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 22:54:58,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-28 22:54:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-10-28 22:54:58,238 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 22:54:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2021-10-28 22:54:58,239 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 13 [2021-10-28 22:54:58,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:54:58,239 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2021-10-28 22:54:58,239 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 22:54:58,245 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2021-10-28 22:54:58,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 22:54:58,246 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:54:58,246 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:54:58,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 22:54:58,246 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:54:58,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:54:58,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1746526086, now seen corresponding path program 1 times [2021-10-28 22:54:58,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:54:58,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736911490] [2021-10-28 22:54:58,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:58,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:54:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:58,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:54:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:54:58,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:54:58,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736911490] [2021-10-28 22:54:58,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736911490] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:54:58,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:54:58,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 22:54:58,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715010643] [2021-10-28 22:54:58,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:54:58,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:54:58,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:54:58,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:54:58,326 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 22:54:58,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:54:58,430 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2021-10-28 22:54:58,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:54:58,430 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 22:54:58,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:54:58,432 INFO L225 Difference]: With dead ends: 71 [2021-10-28 22:54:58,432 INFO L226 Difference]: Without dead ends: 71 [2021-10-28 22:54:58,432 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 22:54:58,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-28 22:54:58,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-10-28 22:54:58,444 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 22:54:58,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2021-10-28 22:54:58,446 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 14 [2021-10-28 22:54:58,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:54:58,446 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2021-10-28 22:54:58,446 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 22:54:58,447 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2021-10-28 22:54:58,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 22:54:58,451 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:54:58,451 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:54:58,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 22:54:58,452 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:54:58,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:54:58,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1874075756, now seen corresponding path program 1 times [2021-10-28 22:54:58,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:54:58,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845855145] [2021-10-28 22:54:58,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:58,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:54:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:58,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:54:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:54:58,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:54:58,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845855145] [2021-10-28 22:54:58,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845855145] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:54:58,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114443688] [2021-10-28 22:54:58,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:58,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:54:58,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:54:58,594 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:54:58,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 22:54:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:58,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 22:54:58,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:54:58,905 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 22:54:58,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 22:54:58,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-10-28 22:54:59,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:54:59,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114443688] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:54:59,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:54:59,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-28 22:54:59,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254725191] [2021-10-28 22:54:59,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:54:59,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:54:59,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:54:59,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:54:59,131 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 22:54:59,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:54:59,294 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2021-10-28 22:54:59,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:54:59,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-28 22:54:59,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:54:59,296 INFO L225 Difference]: With dead ends: 90 [2021-10-28 22:54:59,296 INFO L226 Difference]: Without dead ends: 90 [2021-10-28 22:54:59,297 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:54:59,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-28 22:54:59,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 66. [2021-10-28 22:54:59,300 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 22:54:59,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-10-28 22:54:59,301 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 15 [2021-10-28 22:54:59,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:54:59,301 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-10-28 22:54:59,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:54:59,302 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-10-28 22:54:59,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 22:54:59,303 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:54:59,303 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:54:59,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 22:54:59,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:54:59,523 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting cstrcspnErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:54:59,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:54:59,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1524736785, now seen corresponding path program 1 times [2021-10-28 22:54:59,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:54:59,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077339205] [2021-10-28 22:54:59,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:59,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:54:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:59,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:54:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:54:59,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:54:59,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077339205] [2021-10-28 22:54:59,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077339205] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:54:59,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:54:59,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 22:54:59,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346631122] [2021-10-28 22:54:59,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:54:59,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:54:59,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:54:59,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:54:59,622 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 22:54:59,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:54:59,763 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-10-28 22:54:59,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:54:59,763 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 22:54:59,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:54:59,765 INFO L225 Difference]: With dead ends: 64 [2021-10-28 22:54:59,765 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 22:54:59,765 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 22:54:59,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 22:54:59,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-28 22:54:59,770 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 22:54:59,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-10-28 22:54:59,771 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 17 [2021-10-28 22:54:59,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:54:59,774 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-10-28 22:54:59,775 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 22:54:59,775 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-10-28 22:54:59,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 22:54:59,778 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:54:59,778 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:54:59,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 22:54:59,779 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:54:59,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:54:59,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1524736784, now seen corresponding path program 1 times [2021-10-28 22:54:59,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:54:59,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63521463] [2021-10-28 22:54:59,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:59,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:54:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:59,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:54:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:59,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:54:59,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:54:59,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63521463] [2021-10-28 22:54:59,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63521463] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:54:59,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:54:59,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 22:54:59,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090225891] [2021-10-28 22:54:59,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:54:59,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:54:59,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:54:59,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:54:59,921 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 22:55:00,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:00,175 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2021-10-28 22:55:00,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 22:55:00,176 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 22:55:00,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:00,178 INFO L225 Difference]: With dead ends: 86 [2021-10-28 22:55:00,178 INFO L226 Difference]: Without dead ends: 86 [2021-10-28 22:55:00,179 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 22:55:00,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-28 22:55:00,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 67. [2021-10-28 22:55:00,181 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 22:55:00,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-10-28 22:55:00,182 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 17 [2021-10-28 22:55:00,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:00,182 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-10-28 22:55:00,183 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 22:55:00,183 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-10-28 22:55:00,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 22:55:00,183 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:00,184 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:00,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 22:55:00,184 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:55:00,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:00,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1869159940, now seen corresponding path program 1 times [2021-10-28 22:55:00,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:00,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403314626] [2021-10-28 22:55:00,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:00,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:00,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:00,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:00,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403314626] [2021-10-28 22:55:00,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403314626] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:00,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551993167] [2021-10-28 22:55:00,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:00,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:00,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:00,280 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:00,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 22:55:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:00,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 22:55:00,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:00,437 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 22:55:00,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 22:55:00,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:00,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551993167] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:00,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:00,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-10-28 22:55:00,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592503648] [2021-10-28 22:55:00,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:55:00,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:00,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:55:00,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:55:00,565 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 22:55:00,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:00,748 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2021-10-28 22:55:00,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 22:55:00,748 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 22:55:00,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:00,749 INFO L225 Difference]: With dead ends: 74 [2021-10-28 22:55:00,749 INFO L226 Difference]: Without dead ends: 74 [2021-10-28 22:55:00,750 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 22:55:00,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-28 22:55:00,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2021-10-28 22:55:00,752 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 22:55:00,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-10-28 22:55:00,753 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 17 [2021-10-28 22:55:00,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:00,753 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-10-28 22:55:00,753 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 22:55:00,753 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-10-28 22:55:00,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 22:55:00,754 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:00,754 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:00,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:00,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 22:55:00,964 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrcspnErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:55:00,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:00,965 INFO L85 PathProgramCache]: Analyzing trace with hash 63888821, now seen corresponding path program 1 times [2021-10-28 22:55:00,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:00,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127370556] [2021-10-28 22:55:00,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:00,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:01,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:01,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:01,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127370556] [2021-10-28 22:55:01,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127370556] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:01,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:01,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 22:55:01,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689347161] [2021-10-28 22:55:01,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:55:01,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:01,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:55:01,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:55:01,050 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 22:55:01,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:01,202 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-10-28 22:55:01,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 22:55:01,203 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 22:55:01,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:01,204 INFO L225 Difference]: With dead ends: 64 [2021-10-28 22:55:01,204 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 22:55:01,204 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:55:01,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 22:55:01,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-10-28 22:55:01,207 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 22:55:01,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-10-28 22:55:01,208 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 21 [2021-10-28 22:55:01,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:01,208 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-10-28 22:55:01,208 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 22:55:01,209 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-10-28 22:55:01,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 22:55:01,209 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:01,210 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:01,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 22:55:01,210 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:55:01,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:01,211 INFO L85 PathProgramCache]: Analyzing trace with hash 63888822, now seen corresponding path program 1 times [2021-10-28 22:55:01,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:01,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331293841] [2021-10-28 22:55:01,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:01,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:01,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:01,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:01,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331293841] [2021-10-28 22:55:01,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331293841] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:01,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:01,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 22:55:01,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171145287] [2021-10-28 22:55:01,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 22:55:01,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:01,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 22:55:01,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:55:01,324 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 22:55:01,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:01,593 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2021-10-28 22:55:01,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 22:55:01,593 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 22:55:01,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:01,597 INFO L225 Difference]: With dead ends: 76 [2021-10-28 22:55:01,597 INFO L226 Difference]: Without dead ends: 76 [2021-10-28 22:55:01,598 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 22:55:01,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-28 22:55:01,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2021-10-28 22:55:01,604 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 22:55:01,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2021-10-28 22:55:01,608 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 21 [2021-10-28 22:55:01,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:01,609 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2021-10-28 22:55:01,609 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 22:55:01,609 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2021-10-28 22:55:01,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 22:55:01,610 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:01,610 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 22:55:01,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 22:55:01,611 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 22:55:01,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:01,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1250379430, now seen corresponding path program 1 times [2021-10-28 22:55:01,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:01,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280256704] [2021-10-28 22:55:01,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:01,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:01,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:01,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 22:55:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:01,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:01,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280256704] [2021-10-28 22:55:01,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280256704] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:01,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:01,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 22:55:01,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403495814] [2021-10-28 22:55:01,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:55:01,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:01,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:55:01,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:55:01,729 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 22:55:01,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:01,808 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2021-10-28 22:55:01,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 22:55:01,809 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 22:55:01,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:01,812 INFO L225 Difference]: With dead ends: 67 [2021-10-28 22:55:01,812 INFO L226 Difference]: Without dead ends: 62 [2021-10-28 22:55:01,815 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:55:01,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-28 22:55:01,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-28 22:55:01,818 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 22:55:01,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-10-28 22:55:01,819 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 23 [2021-10-28 22:55:01,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:01,819 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-10-28 22:55:01,820 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 22:55:01,820 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-10-28 22:55:01,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-28 22:55:01,827 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:01,827 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 22:55:01,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-28 22:55:01,828 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:55:01,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:01,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1590997555, now seen corresponding path program 1 times [2021-10-28 22:55:01,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:01,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155814143] [2021-10-28 22:55:01,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:01,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:01,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:01,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:01,874 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 22:55:01,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:01,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155814143] [2021-10-28 22:55:01,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155814143] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:01,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:01,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 22:55:01,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279746257] [2021-10-28 22:55:01,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:55:01,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:01,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:55:01,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:55:01,880 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 22:55:01,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:01,954 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-10-28 22:55:01,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 22:55:01,955 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 22:55:01,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:01,957 INFO L225 Difference]: With dead ends: 64 [2021-10-28 22:55:01,957 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 22:55:01,957 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 22:55:01,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 22:55:01,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-28 22:55:01,961 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 22:55:01,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-10-28 22:55:01,962 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 25 [2021-10-28 22:55:01,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:01,962 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-10-28 22:55:01,962 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 22:55:01,963 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-10-28 22:55:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 22:55:01,964 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:01,964 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 22:55:01,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-28 22:55:01,965 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:55:01,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:01,966 INFO L85 PathProgramCache]: Analyzing trace with hash 53849226, now seen corresponding path program 1 times [2021-10-28 22:55:01,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:01,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741898441] [2021-10-28 22:55:01,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:01,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:02,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:55:02,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:02,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741898441] [2021-10-28 22:55:02,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741898441] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:02,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:02,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 22:55:02,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221687099] [2021-10-28 22:55:02,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 22:55:02,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:02,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 22:55:02,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:55:02,147 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 22:55:02,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:02,371 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2021-10-28 22:55:02,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:55:02,371 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 22:55:02,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:02,372 INFO L225 Difference]: With dead ends: 77 [2021-10-28 22:55:02,372 INFO L226 Difference]: Without dead ends: 59 [2021-10-28 22:55:02,372 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 22:55:02,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-28 22:55:02,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-10-28 22:55:02,374 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 22:55:02,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2021-10-28 22:55:02,375 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 27 [2021-10-28 22:55:02,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:02,375 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2021-10-28 22:55:02,375 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 22:55:02,375 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2021-10-28 22:55:02,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 22:55:02,375 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:02,375 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 22:55:02,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-28 22:55:02,376 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:55:02,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:02,376 INFO L85 PathProgramCache]: Analyzing trace with hash 476551052, now seen corresponding path program 1 times [2021-10-28 22:55:02,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:02,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417486361] [2021-10-28 22:55:02,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:02,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:02,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:55:02,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:02,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417486361] [2021-10-28 22:55:02,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417486361] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:02,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:02,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 22:55:02,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167556182] [2021-10-28 22:55:02,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 22:55:02,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:02,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 22:55:02,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:55:02,630 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 22:55:02,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:02,875 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-10-28 22:55:02,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 22:55:02,875 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 22:55:02,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:02,877 INFO L225 Difference]: With dead ends: 80 [2021-10-28 22:55:02,877 INFO L226 Difference]: Without dead ends: 67 [2021-10-28 22:55:02,877 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 22:55:02,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-28 22:55:02,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-10-28 22:55:02,883 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 22:55:02,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2021-10-28 22:55:02,884 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 27 [2021-10-28 22:55:02,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:02,884 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2021-10-28 22:55:02,885 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 22:55:02,885 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2021-10-28 22:55:02,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 22:55:02,885 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:02,886 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 22:55:02,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-28 22:55:02,886 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:55:02,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:02,887 INFO L85 PathProgramCache]: Analyzing trace with hash -183584433, now seen corresponding path program 1 times [2021-10-28 22:55:02,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:02,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998021189] [2021-10-28 22:55:02,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:02,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:03,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:55:03,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:03,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998021189] [2021-10-28 22:55:03,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998021189] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:03,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:03,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 22:55:03,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850454894] [2021-10-28 22:55:03,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 22:55:03,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:03,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 22:55:03,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:55:03,062 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 22:55:03,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:03,371 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2021-10-28 22:55:03,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 22:55:03,372 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 22:55:03,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:03,372 INFO L225 Difference]: With dead ends: 81 [2021-10-28 22:55:03,373 INFO L226 Difference]: Without dead ends: 81 [2021-10-28 22:55:03,373 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 22:55:03,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-28 22:55:03,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-10-28 22:55:03,375 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 22:55:03,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2021-10-28 22:55:03,375 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 31 [2021-10-28 22:55:03,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:03,375 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2021-10-28 22:55:03,376 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 22:55:03,376 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2021-10-28 22:55:03,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 22:55:03,376 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:03,376 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 22:55:03,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-28 22:55:03,377 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:55:03,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:03,377 INFO L85 PathProgramCache]: Analyzing trace with hash -317597939, now seen corresponding path program 1 times [2021-10-28 22:55:03,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:03,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914559878] [2021-10-28 22:55:03,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:03,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:03,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:55:03,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:03,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914559878] [2021-10-28 22:55:03,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914559878] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:03,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:03,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-28 22:55:03,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830238867] [2021-10-28 22:55:03,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 22:55:03,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:03,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 22:55:03,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-28 22:55:03,583 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 22:55:03,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:03,883 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2021-10-28 22:55:03,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 22:55:03,883 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 22:55:03,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:03,884 INFO L225 Difference]: With dead ends: 103 [2021-10-28 22:55:03,884 INFO L226 Difference]: Without dead ends: 103 [2021-10-28 22:55:03,885 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 22:55:03,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-28 22:55:03,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2021-10-28 22:55:03,887 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 22:55:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-10-28 22:55:03,888 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 31 [2021-10-28 22:55:03,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:03,888 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-10-28 22:55:03,888 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 22:55:03,888 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-10-28 22:55:03,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 22:55:03,889 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:03,889 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 22:55:03,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-28 22:55:03,889 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:55:03,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:03,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1215695489, now seen corresponding path program 1 times [2021-10-28 22:55:03,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:03,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071009489] [2021-10-28 22:55:03,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:03,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:04,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:04,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:04,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071009489] [2021-10-28 22:55:04,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071009489] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:04,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004694207] [2021-10-28 22:55:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:04,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:04,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:04,078 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:04,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 22:55:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:04,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-28 22:55:04,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:04,309 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 22:55:04,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 22:55:04,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-10-28 22:55:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:04,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004694207] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:04,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:04,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-10-28 22:55:04,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522456428] [2021-10-28 22:55:04,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 22:55:04,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:04,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 22:55:04,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-10-28 22:55:04,620 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 12 states have internal predecessors, (43), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:04,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:04,986 INFO L93 Difference]: Finished difference Result 152 states and 171 transitions. [2021-10-28 22:55:04,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:55:04,987 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 12 states have internal predecessors, (43), 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 32 [2021-10-28 22:55:04,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:04,988 INFO L225 Difference]: With dead ends: 152 [2021-10-28 22:55:04,988 INFO L226 Difference]: Without dead ends: 152 [2021-10-28 22:55:04,988 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-10-28 22:55:04,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-28 22:55:04,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 113. [2021-10-28 22:55:04,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 103 states have (on average 1.2233009708737863) internal successors, (126), 107 states have internal predecessors, (126), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:04,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 131 transitions. [2021-10-28 22:55:04,993 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 131 transitions. Word has length 32 [2021-10-28 22:55:04,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:04,993 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 131 transitions. [2021-10-28 22:55:04,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 12 states have internal predecessors, (43), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:04,994 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 131 transitions. [2021-10-28 22:55:04,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 22:55:04,994 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:04,994 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 22:55:05,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:05,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-28 22:55:05,207 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:55:05,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:05,207 INFO L85 PathProgramCache]: Analyzing trace with hash 929596304, now seen corresponding path program 1 times [2021-10-28 22:55:05,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:05,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654044775] [2021-10-28 22:55:05,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:05,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:05,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:55:05,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:05,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654044775] [2021-10-28 22:55:05,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654044775] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:05,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807822341] [2021-10-28 22:55:05,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:05,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:05,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:05,364 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:05,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 22:55:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:05,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 22:55:05,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:55:05,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807822341] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:05,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:05,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-10-28 22:55:05,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456242990] [2021-10-28 22:55:05,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 22:55:05,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:05,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 22:55:05,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-10-28 22:55:05,750 INFO L87 Difference]: Start difference. First operand 113 states and 131 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 22:55:06,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:06,198 INFO L93 Difference]: Finished difference Result 152 states and 172 transitions. [2021-10-28 22:55:06,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 22:55:06,201 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 22:55:06,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:06,202 INFO L225 Difference]: With dead ends: 152 [2021-10-28 22:55:06,202 INFO L226 Difference]: Without dead ends: 152 [2021-10-28 22:55:06,203 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 22:55:06,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-28 22:55:06,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 125. [2021-10-28 22:55:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 119 states have internal predecessors, (142), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:06,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2021-10-28 22:55:06,208 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 35 [2021-10-28 22:55:06,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:06,208 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2021-10-28 22:55:06,208 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 22:55:06,209 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2021-10-28 22:55:06,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-28 22:55:06,209 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:06,210 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 22:55:06,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:06,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-28 22:55:06,420 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:55:06,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:06,420 INFO L85 PathProgramCache]: Analyzing trace with hash -800192796, now seen corresponding path program 2 times [2021-10-28 22:55:06,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:06,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518111148] [2021-10-28 22:55:06,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:06,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:06,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:06,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:06,697 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 22:55:06,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:06,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518111148] [2021-10-28 22:55:06,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518111148] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:06,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845745003] [2021-10-28 22:55:06,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:55:06,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:06,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:06,699 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:06,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 22:55:06,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:55:06,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:55:06,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 22:55:06,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:06,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-10-28 22:55:07,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 22:55:07,733 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 33 treesize of output 33 [2021-10-28 22:55:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:55:08,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845745003] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:08,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:08,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-10-28 22:55:08,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235300497] [2021-10-28 22:55:08,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 22:55:08,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:08,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 22:55:08,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-10-28 22:55:08,025 INFO L87 Difference]: Start difference. First operand 125 states and 147 transitions. Second operand has 27 states, 25 states have (on average 2.8) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:10,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:10,676 INFO L93 Difference]: Finished difference Result 248 states and 277 transitions. [2021-10-28 22:55:10,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 22:55:10,677 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.8) internal successors, (70), 24 states have internal predecessors, (70), 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 22:55:10,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:10,680 INFO L225 Difference]: With dead ends: 248 [2021-10-28 22:55:10,680 INFO L226 Difference]: Without dead ends: 248 [2021-10-28 22:55:10,682 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=286, Invalid=1970, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 22:55:10,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-10-28 22:55:10,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 182. [2021-10-28 22:55:10,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 171 states have (on average 1.2222222222222223) internal successors, (209), 175 states have internal predecessors, (209), 5 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:10,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 215 transitions. [2021-10-28 22:55:10,691 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 215 transitions. Word has length 41 [2021-10-28 22:55:10,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:10,692 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 215 transitions. [2021-10-28 22:55:10,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.8) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:10,692 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 215 transitions. [2021-10-28 22:55:10,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-28 22:55:10,693 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:10,693 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:10,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:10,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:10,908 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:55:10,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:10,908 INFO L85 PathProgramCache]: Analyzing trace with hash 23212469, now seen corresponding path program 2 times [2021-10-28 22:55:10,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:10,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259928856] [2021-10-28 22:55:10,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:10,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:10,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:11,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:11,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:11,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259928856] [2021-10-28 22:55:11,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259928856] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:11,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656223514] [2021-10-28 22:55:11,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:55:11,418 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:11,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:11,436 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:11,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 22:55:11,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:55:11,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:55:11,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-28 22:55:11,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:11,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 22:55:11,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 22:55:11,952 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-10-28 22:55:11,953 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 26 treesize of output 25 [2021-10-28 22:55:12,601 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-10-28 22:55:12,602 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 35 treesize of output 23 [2021-10-28 22:55:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:12,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656223514] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:12,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:12,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-10-28 22:55:12,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969192214] [2021-10-28 22:55:12,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 22:55:12,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:12,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 22:55:12,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-10-28 22:55:12,633 INFO L87 Difference]: Start difference. First operand 182 states and 215 transitions. Second operand has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 20 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:13,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:13,572 INFO L93 Difference]: Finished difference Result 297 states and 342 transitions. [2021-10-28 22:55:13,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 22:55:13,580 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 20 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-10-28 22:55:13,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:13,582 INFO L225 Difference]: With dead ends: 297 [2021-10-28 22:55:13,582 INFO L226 Difference]: Without dead ends: 246 [2021-10-28 22:55:13,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 22:55:13,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-10-28 22:55:13,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 234. [2021-10-28 22:55:13,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 222 states have (on average 1.1981981981981982) internal successors, (266), 226 states have internal predecessors, (266), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:13,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 273 transitions. [2021-10-28 22:55:13,592 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 273 transitions. Word has length 43 [2021-10-28 22:55:13,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:13,592 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 273 transitions. [2021-10-28 22:55:13,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 20 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:13,593 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 273 transitions. [2021-10-28 22:55:13,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 22:55:13,593 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:13,594 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:13,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:13,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:13,796 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:55:13,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:13,797 INFO L85 PathProgramCache]: Analyzing trace with hash 51080568, now seen corresponding path program 3 times [2021-10-28 22:55:13,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:13,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777742901] [2021-10-28 22:55:13,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:13,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:13,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:13,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:13,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777742901] [2021-10-28 22:55:13,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777742901] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:13,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487660192] [2021-10-28 22:55:13,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 22:55:13,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:13,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:13,968 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:13,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 22:55:14,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 22:55:14,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:55:14,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-28 22:55:14,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:14,297 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 22:55:14,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 22:55:14,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 22:55:15,786 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-10-28 22:55:15,786 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 40 treesize of output 35 [2021-10-28 22:55:16,022 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:16,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487660192] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:16,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:16,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 24 [2021-10-28 22:55:16,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719607718] [2021-10-28 22:55:16,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 22:55:16,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:16,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 22:55:16,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2021-10-28 22:55:16,025 INFO L87 Difference]: Start difference. First operand 234 states and 273 transitions. Second operand has 25 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:18,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:18,618 INFO L93 Difference]: Finished difference Result 412 states and 465 transitions. [2021-10-28 22:55:18,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 22:55:18,618 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 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 47 [2021-10-28 22:55:18,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:18,621 INFO L225 Difference]: With dead ends: 412 [2021-10-28 22:55:18,621 INFO L226 Difference]: Without dead ends: 412 [2021-10-28 22:55:18,623 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=291, Invalid=1965, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 22:55:18,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-10-28 22:55:18,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 296. [2021-10-28 22:55:18,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 284 states have (on average 1.2007042253521127) internal successors, (341), 288 states have internal predecessors, (341), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:18,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 348 transitions. [2021-10-28 22:55:18,637 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 348 transitions. Word has length 47 [2021-10-28 22:55:18,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:18,637 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 348 transitions. [2021-10-28 22:55:18,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:18,638 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 348 transitions. [2021-10-28 22:55:18,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 22:55:18,639 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:18,639 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 22:55:18,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:18,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 22:55:18,868 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:55:18,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:18,868 INFO L85 PathProgramCache]: Analyzing trace with hash -608435781, now seen corresponding path program 3 times [2021-10-28 22:55:18,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:18,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707483596] [2021-10-28 22:55:18,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:18,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:19,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:19,302 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 22:55:19,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:19,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707483596] [2021-10-28 22:55:19,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707483596] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:19,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347359936] [2021-10-28 22:55:19,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 22:55:19,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:19,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:19,308 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:19,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 22:55:19,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 22:55:19,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:55:19,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-28 22:55:19,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:19,780 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 22:55:19,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 22:55:19,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 22:55:20,677 INFO L354 Elim1Store]: treesize reduction 3, result has 76.9 percent of original size [2021-10-28 22:55:20,677 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 22:55:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-28 22:55:20,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347359936] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:20,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:20,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 32 [2021-10-28 22:55:20,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742394196] [2021-10-28 22:55:20,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 22:55:20,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:20,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 22:55:20,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-10-28 22:55:20,745 INFO L87 Difference]: Start difference. First operand 296 states and 348 transitions. Second operand has 32 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 29 states have internal predecessors, (83), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:25,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:25,161 INFO L93 Difference]: Finished difference Result 548 states and 604 transitions. [2021-10-28 22:55:25,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-10-28 22:55:25,161 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 29 states have internal predecessors, (83), 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 22:55:25,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:25,164 INFO L225 Difference]: With dead ends: 548 [2021-10-28 22:55:25,164 INFO L226 Difference]: Without dead ends: 476 [2021-10-28 22:55:25,167 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1037, Invalid=7335, Unknown=0, NotChecked=0, Total=8372 [2021-10-28 22:55:25,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-10-28 22:55:25,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 269. [2021-10-28 22:55:25,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 260 states have (on average 1.15) internal successors, (299), 261 states have internal predecessors, (299), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:25,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 306 transitions. [2021-10-28 22:55:25,178 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 306 transitions. Word has length 51 [2021-10-28 22:55:25,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:25,178 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 306 transitions. [2021-10-28 22:55:25,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 29 states have internal predecessors, (83), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:25,179 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 306 transitions. [2021-10-28 22:55:25,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 22:55:25,180 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:25,180 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 22:55:25,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:25,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 22:55:25,396 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:55:25,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:25,396 INFO L85 PathProgramCache]: Analyzing trace with hash 988427292, now seen corresponding path program 4 times [2021-10-28 22:55:25,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:25,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931080747] [2021-10-28 22:55:25,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:25,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:25,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:25,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:25,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931080747] [2021-10-28 22:55:25,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931080747] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:25,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667138848] [2021-10-28 22:55:25,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 22:55:25,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:25,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:25,640 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:25,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 22:55:25,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 22:55:25,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:55:25,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-28 22:55:25,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:26,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 22:55:26,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 22:55:26,367 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-28 22:55:26,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-28 22:55:28,253 INFO L354 Elim1Store]: treesize reduction 120, result has 12.4 percent of original size [2021-10-28 22:55:28,253 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 69 treesize of output 55 [2021-10-28 22:55:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:28,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667138848] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:28,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:28,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18] total 29 [2021-10-28 22:55:28,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134937313] [2021-10-28 22:55:28,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 22:55:28,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:28,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 22:55:28,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-10-28 22:55:28,297 INFO L87 Difference]: Start difference. First operand 269 states and 306 transitions. Second operand has 29 states, 28 states have (on average 3.392857142857143) internal successors, (95), 26 states have internal predecessors, (95), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:37,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:37,987 INFO L93 Difference]: Finished difference Result 453 states and 508 transitions. [2021-10-28 22:55:37,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 22:55:37,988 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.392857142857143) internal successors, (95), 26 states have internal predecessors, (95), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-10-28 22:55:37,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:37,989 INFO L225 Difference]: With dead ends: 453 [2021-10-28 22:55:37,989 INFO L226 Difference]: Without dead ends: 283 [2021-10-28 22:55:37,990 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=211, Invalid=1769, Unknown=0, NotChecked=0, Total=1980 [2021-10-28 22:55:37,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-10-28 22:55:37,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 277. [2021-10-28 22:55:37,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 268 states have (on average 1.1455223880597014) internal successors, (307), 269 states have internal predecessors, (307), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:37,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 314 transitions. [2021-10-28 22:55:37,999 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 314 transitions. Word has length 58 [2021-10-28 22:55:37,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:38,000 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 314 transitions. [2021-10-28 22:55:38,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.392857142857143) internal successors, (95), 26 states have internal predecessors, (95), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:38,000 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 314 transitions. [2021-10-28 22:55:38,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-28 22:55:38,001 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:38,001 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 22:55:38,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:38,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 22:55:38,212 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:55:38,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:38,212 INFO L85 PathProgramCache]: Analyzing trace with hash 39819769, now seen corresponding path program 5 times [2021-10-28 22:55:38,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:38,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967338762] [2021-10-28 22:55:38,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:38,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:38,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:38,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:38,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967338762] [2021-10-28 22:55:38,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967338762] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:38,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915827653] [2021-10-28 22:55:38,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 22:55:38,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:38,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:38,408 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:38,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 22:55:38,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-28 22:55:38,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:55:38,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 22:55:38,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:39,190 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:39,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915827653] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:39,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:39,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-10-28 22:55:39,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12075107] [2021-10-28 22:55:39,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 22:55:39,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:39,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 22:55:39,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-10-28 22:55:39,192 INFO L87 Difference]: Start difference. First operand 277 states and 314 transitions. Second operand has 21 states, 20 states have (on average 4.45) internal successors, (89), 18 states have internal predecessors, (89), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:39,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:39,789 INFO L93 Difference]: Finished difference Result 395 states and 448 transitions. [2021-10-28 22:55:39,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 22:55:39,799 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.45) internal successors, (89), 18 states have internal predecessors, (89), 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 62 [2021-10-28 22:55:39,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:39,801 INFO L225 Difference]: With dead ends: 395 [2021-10-28 22:55:39,801 INFO L226 Difference]: Without dead ends: 395 [2021-10-28 22:55:39,802 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-10-28 22:55:39,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-10-28 22:55:39,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 342. [2021-10-28 22:55:39,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 333 states have (on average 1.1411411411411412) internal successors, (380), 334 states have internal predecessors, (380), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:39,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 387 transitions. [2021-10-28 22:55:39,813 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 387 transitions. Word has length 62 [2021-10-28 22:55:39,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:39,814 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 387 transitions. [2021-10-28 22:55:39,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.45) internal successors, (89), 18 states have internal predecessors, (89), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:39,814 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 387 transitions. [2021-10-28 22:55:39,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-28 22:55:39,815 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:39,816 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 22:55:39,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:40,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 22:55:40,040 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:55:40,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:40,040 INFO L85 PathProgramCache]: Analyzing trace with hash -2012816133, now seen corresponding path program 6 times [2021-10-28 22:55:40,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:40,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567919745] [2021-10-28 22:55:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:40,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:40,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:40,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:40,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567919745] [2021-10-28 22:55:40,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567919745] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:40,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982126383] [2021-10-28 22:55:40,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 22:55:40,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:40,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:40,362 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:40,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 22:55:40,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-28 22:55:40,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:55:40,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-28 22:55:40,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:40,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 22:55:41,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 22:55:41,310 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-28 22:55:41,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-28 22:55:42,399 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-28 22:55:42,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-10-28 22:55:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:42,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982126383] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:42,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:42,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-10-28 22:55:42,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668729857] [2021-10-28 22:55:42,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 22:55:42,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:42,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 22:55:42,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-10-28 22:55:42,422 INFO L87 Difference]: Start difference. First operand 342 states and 387 transitions. Second operand has 29 states, 28 states have (on average 4.392857142857143) internal successors, (123), 26 states have internal predecessors, (123), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:59,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:59,936 INFO L93 Difference]: Finished difference Result 591 states and 662 transitions. [2021-10-28 22:55:59,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 22:55:59,937 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.392857142857143) internal successors, (123), 26 states have internal predecessors, (123), 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 73 [2021-10-28 22:55:59,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:59,940 INFO L225 Difference]: With dead ends: 591 [2021-10-28 22:55:59,940 INFO L226 Difference]: Without dead ends: 356 [2021-10-28 22:55:59,941 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 22:55:59,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-10-28 22:55:59,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 350. [2021-10-28 22:55:59,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 341 states have (on average 1.1378299120234605) internal successors, (388), 342 states have internal predecessors, (388), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:59,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 395 transitions. [2021-10-28 22:55:59,952 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 395 transitions. Word has length 73 [2021-10-28 22:55:59,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:59,952 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 395 transitions. [2021-10-28 22:55:59,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.392857142857143) internal successors, (123), 26 states have internal predecessors, (123), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:55:59,953 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 395 transitions. [2021-10-28 22:55:59,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-28 22:55:59,954 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:59,954 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 22:55:59,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:00,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 22:56:00,189 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:56:00,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:00,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1889050242, now seen corresponding path program 7 times [2021-10-28 22:56:00,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:00,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732624154] [2021-10-28 22:56:00,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:00,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:00,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:56:00,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:00,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732624154] [2021-10-28 22:56:00,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732624154] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:00,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471523614] [2021-10-28 22:56:00,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 22:56:00,444 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:00,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:00,445 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:00,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 22:56:01,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:01,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-28 22:56:01,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:01,267 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 22:56:01,267 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 13 treesize of output 18 [2021-10-28 22:56:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 15 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:56:03,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471523614] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:03,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:03,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2021-10-28 22:56:03,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328829893] [2021-10-28 22:56:03,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 22:56:03,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:03,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 22:56:03,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2021-10-28 22:56:03,134 INFO L87 Difference]: Start difference. First operand 350 states and 395 transitions. Second operand has 29 states, 28 states have (on average 5.107142857142857) internal successors, (143), 26 states have internal predecessors, (143), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:05,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:05,282 INFO L93 Difference]: Finished difference Result 541 states and 602 transitions. [2021-10-28 22:56:05,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 22:56:05,293 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 5.107142857142857) internal successors, (143), 26 states have internal predecessors, (143), 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 77 [2021-10-28 22:56:05,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:05,297 INFO L225 Difference]: With dead ends: 541 [2021-10-28 22:56:05,297 INFO L226 Difference]: Without dead ends: 541 [2021-10-28 22:56:05,298 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=246, Invalid=2204, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 22:56:05,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-10-28 22:56:05,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 415. [2021-10-28 22:56:05,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 406 states have (on average 1.1354679802955665) internal successors, (461), 407 states have internal predecessors, (461), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:05,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 468 transitions. [2021-10-28 22:56:05,314 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 468 transitions. Word has length 77 [2021-10-28 22:56:05,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:05,314 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 468 transitions. [2021-10-28 22:56:05,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 5.107142857142857) internal successors, (143), 26 states have internal predecessors, (143), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:05,315 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 468 transitions. [2021-10-28 22:56:05,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-10-28 22:56:05,317 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:05,317 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 22:56:05,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:05,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:05,528 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:56:05,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:05,529 INFO L85 PathProgramCache]: Analyzing trace with hash 2004328534, now seen corresponding path program 8 times [2021-10-28 22:56:05,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:05,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950045372] [2021-10-28 22:56:05,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:05,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:05,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:05,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 41 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:56:05,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:05,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950045372] [2021-10-28 22:56:05,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950045372] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:05,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107218618] [2021-10-28 22:56:05,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:56:05,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:05,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:05,929 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:05,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 22:56:06,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:56:06,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:56:06,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-28 22:56:06,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:06,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 22:56:06,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 22:56:07,047 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-28 22:56:07,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-28 22:56:08,547 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-28 22:56:08,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-10-28 22:56:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 41 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:56:08,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107218618] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:08,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:08,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-10-28 22:56:08,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512876464] [2021-10-28 22:56:08,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-28 22:56:08,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:08,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-28 22:56:08,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 22:56:08,572 INFO L87 Difference]: Start difference. First operand 415 states and 468 transitions. Second operand has 33 states, 32 states have (on average 4.78125) internal successors, (153), 30 states have internal predecessors, (153), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:32,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:32,983 INFO L93 Difference]: Finished difference Result 729 states and 816 transitions. [2021-10-28 22:56:32,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 22:56:32,983 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 4.78125) internal successors, (153), 30 states have internal predecessors, (153), 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 88 [2021-10-28 22:56:32,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:32,985 INFO L225 Difference]: With dead ends: 729 [2021-10-28 22:56:32,985 INFO L226 Difference]: Without dead ends: 429 [2021-10-28 22:56:32,987 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=167, Invalid=1725, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 22:56:32,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-10-28 22:56:32,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 423. [2021-10-28 22:56:32,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 414 states have (on average 1.1328502415458936) internal successors, (469), 415 states have internal predecessors, (469), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:32,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 476 transitions. [2021-10-28 22:56:32,998 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 476 transitions. Word has length 88 [2021-10-28 22:56:32,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:32,999 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 476 transitions. [2021-10-28 22:56:32,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 4.78125) internal successors, (153), 30 states have internal predecessors, (153), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:56:32,999 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 476 transitions. [2021-10-28 22:56:33,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-28 22:56:33,001 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:33,001 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 22:56:33,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:33,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-28 22:56:33,218 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 22:56:33,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:33,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1747133811, now seen corresponding path program 9 times [2021-10-28 22:56:33,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:33,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004691871] [2021-10-28 22:56:33,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:33,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:33,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 15 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:56:33,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:33,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004691871] [2021-10-28 22:56:33,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004691871] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:33,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672496884] [2021-10-28 22:56:33,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 22:56:33,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:33,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:33,545 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:33,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 22:56:34,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-28 22:56:34,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:56:34,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-28 22:56:34,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:34,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 22:56:34,635 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 22:56:34,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 22:56:35,000 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-10-28 22:56:35,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-28 22:56:39,021 INFO L354 Elim1Store]: treesize reduction 79, result has 20.2 percent of original size [2021-10-28 22:56:39,021 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 50 treesize of output 43 [2021-10-28 22:56:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 32 proven. 17 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-10-28 22:56:39,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672496884] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:39,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:39,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2021-10-28 22:56:39,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427524111] [2021-10-28 22:56:39,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 22:56:39,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:39,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 22:56:39,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-10-28 22:56:39,101 INFO L87 Difference]: Start difference. First operand 423 states and 476 transitions. Second operand has 32 states, 30 states have (on average 4.133333333333334) internal successors, (124), 29 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 22:57:44,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:57:44,930 INFO L93 Difference]: Finished difference Result 528 states and 583 transitions. [2021-10-28 22:57:44,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-10-28 22:57:44,930 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 4.133333333333334) internal successors, (124), 29 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 92 [2021-10-28 22:57:44,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:57:44,931 INFO L225 Difference]: With dead ends: 528 [2021-10-28 22:57:44,931 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 22:57:44,933 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 61.9s TimeCoverageRelationStatistics Valid=854, Invalid=7155, Unknown=1, NotChecked=0, Total=8010 [2021-10-28 22:57:44,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 22:57:44,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 22:57:44,934 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 22:57:44,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 22:57:44,934 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 92 [2021-10-28 22:57:44,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:57:44,934 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 22:57:44,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 4.133333333333334) internal successors, (124), 29 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 22:57:44,935 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 22:57:44,935 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 22:57:44,936 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-28 22:57:44,937 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-28 22:57:44,937 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-28 22:57:44,937 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-28 22:57:44,937 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION [2021-10-28 22:57:44,937 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION [2021-10-28 22:57:44,937 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION [2021-10-28 22:57:44,937 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION [2021-10-28 22:57:44,937 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 22:57:44,937 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr0REQUIRES_VIOLATION [2021-10-28 22:57:44,937 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr1REQUIRES_VIOLATION [2021-10-28 22:57:44,938 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr2REQUIRES_VIOLATION [2021-10-28 22:57:44,938 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr3REQUIRES_VIOLATION [2021-10-28 22:57:44,938 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr4REQUIRES_VIOLATION [2021-10-28 22:57:44,938 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr5REQUIRES_VIOLATION [2021-10-28 22:57:44,938 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr6REQUIRES_VIOLATION [2021-10-28 22:57:44,938 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr7REQUIRES_VIOLATION [2021-10-28 22:57:44,938 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr8REQUIRES_VIOLATION [2021-10-28 22:57:44,938 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr9REQUIRES_VIOLATION [2021-10-28 22:57:44,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 22:57:45,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:57:45,142 INFO L731 BasicCegarLoop]: Path program histogram: [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:57:45,144 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 22:57:45,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 10:57:45 BoogieIcfgContainer [2021-10-28 22:57:45,146 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 22:57:45,147 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 22:57:45,147 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 22:57:45,147 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 22:57:45,148 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:54:55" (3/4) ... [2021-10-28 22:57:45,150 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 22:57:45,155 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 22:57:45,155 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrcspn [2021-10-28 22:57:45,155 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-28 22:57:45,155 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-28 22:57:45,155 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-10-28 22:57:45,156 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-10-28 22:57:45,156 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 22:57:45,156 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-10-28 22:57:45,161 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-10-28 22:57:45,161 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-28 22:57:45,161 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 22:57:45,162 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 22:57:45,208 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 22:57:45,208 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 22:57:45,209 INFO L168 Benchmark]: Toolchain (without parser) took 170959.38 ms. Allocated memory was 125.8 MB in the beginning and 161.5 MB in the end (delta: 35.7 MB). Free memory was 89.2 MB in the beginning and 37.4 MB in the end (delta: 51.8 MB). Peak memory consumption was 88.3 MB. Max. memory is 16.1 GB. [2021-10-28 22:57:45,210 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory is still 106.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:57:45,210 INFO L168 Benchmark]: CACSL2BoogieTranslator took 557.18 ms. Allocated memory is still 125.8 MB. Free memory was 89.0 MB in the beginning and 96.6 MB in the end (delta: -7.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 22:57:45,210 INFO L168 Benchmark]: Boogie Preprocessor took 73.53 ms. Allocated memory is still 125.8 MB. Free memory was 96.6 MB in the beginning and 94.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 22:57:45,211 INFO L168 Benchmark]: RCFGBuilder took 722.21 ms. Allocated memory is still 125.8 MB. Free memory was 94.1 MB in the beginning and 73.1 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-28 22:57:45,211 INFO L168 Benchmark]: TraceAbstraction took 169535.37 ms. Allocated memory was 125.8 MB in the beginning and 161.5 MB in the end (delta: 35.7 MB). Free memory was 72.6 MB in the beginning and 41.3 MB in the end (delta: 31.3 MB). Peak memory consumption was 69.7 MB. Max. memory is 16.1 GB. [2021-10-28 22:57:45,212 INFO L168 Benchmark]: Witness Printer took 61.63 ms. Allocated memory is still 161.5 MB. Free memory was 41.3 MB in the beginning and 37.4 MB in the end (delta: 3.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 22:57:45,214 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory is still 106.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 557.18 ms. Allocated memory is still 125.8 MB. Free memory was 89.0 MB in the beginning and 96.6 MB in the end (delta: -7.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 73.53 ms. Allocated memory is still 125.8 MB. Free memory was 96.6 MB in the beginning and 94.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 722.21 ms. Allocated memory is still 125.8 MB. Free memory was 94.1 MB in the beginning and 73.1 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 169535.37 ms. Allocated memory was 125.8 MB in the beginning and 161.5 MB in the end (delta: 35.7 MB). Free memory was 72.6 MB in the beginning and 41.3 MB in the end (delta: 31.3 MB). Peak memory consumption was 69.7 MB. Max. memory is 16.1 GB. * Witness Printer took 61.63 ms. Allocated memory is still 161.5 MB. Free memory was 41.3 MB in the beginning and 37.4 MB in the end (delta: 3.9 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: 549]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 549]: 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: 553]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 553]: 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: 169.4s, OverallIterations: 32, TraceHistogramMax: 5, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 135.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1306 SDtfs, 5167 SDslu, 3192 SDs, 0 SdLazy, 19969 SolverSat, 660 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 17.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1352 GetRequests, 653 SyntacticMatches, 11 SemanticMatches, 688 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6677 ImplicationChecksByTransitivity, 123.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=423occurred in iteration=31, InterpolantAutomatonStates: 454, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 32 MinimizatonAttempts, 814 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 23.6s InterpolantComputationTime, 1801 NumberOfCodeBlocks, 1798 NumberOfCodeBlocksAsserted, 66 NumberOfCheckSat, 1755 ConstructedInterpolants, 286 QuantifiedInterpolants, 20907 SizeOfPredicates, 165 NumberOfNonLiveVariables, 3013 ConjunctsInSsa, 475 ConjunctsInUnsatCore, 46 InterpolantComputations, 18 PerfectInterpolantSequences, 443/1325 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 22:57:45,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f6136cd-4202-47c2-8c4f-3321b94a55c6/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...