./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c8f03aacd6a0ba176a4c5bf885e9983ba429f85c .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c8f03aacd6a0ba176a4c5bf885e9983ba429f85c ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:52:44,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:52:44,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:52:44,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:52:44,801 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:52:44,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:52:44,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:52:44,807 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:52:44,809 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:52:44,811 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:52:44,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:52:44,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:52:44,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:52:44,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:52:44,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:52:44,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:52:44,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:52:44,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:52:44,825 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:52:44,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:52:44,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:52:44,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:52:44,833 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:52:44,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:52:44,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:52:44,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:52:44,841 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:52:44,842 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:52:44,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:52:44,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:52:44,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:52:44,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:52:44,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:52:44,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:52:44,850 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:52:44,850 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:52:44,851 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:52:44,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:52:44,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:52:44,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:52:44,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:52:44,855 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-13 00:52:44,880 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:52:44,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:52:44,881 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:52:44,881 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:52:44,882 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:52:44,883 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:52:44,883 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:52:44,883 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:52:44,884 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:52:44,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:52:44,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:52:44,884 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:52:44,884 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 00:52:44,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:52:44,885 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 00:52:44,885 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:52:44,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:52:44,886 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:52:44,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 00:52:44,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:52:44,886 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:52:44,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:52:44,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:52:44,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:52:44,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:52:44,888 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 00:52:44,888 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:52:44,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:52:44,888 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 00:52:44,889 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:52:44,889 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_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8f03aacd6a0ba176a4c5bf885e9983ba429f85c [2021-10-13 00:52:45,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:52:45,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:52:45,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:52:45,213 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:52:45,217 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:52:45,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/forester-heap/dll-reverse.i [2021-10-13 00:52:45,281 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/data/4bf8cccfd/482dea5a319542afa52bc66b76d2b8a6/FLAGd80ee9191 [2021-10-13 00:52:45,887 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:52:45,888 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/sv-benchmarks/c/forester-heap/dll-reverse.i [2021-10-13 00:52:45,903 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/data/4bf8cccfd/482dea5a319542afa52bc66b76d2b8a6/FLAGd80ee9191 [2021-10-13 00:52:46,201 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/data/4bf8cccfd/482dea5a319542afa52bc66b76d2b8a6 [2021-10-13 00:52:46,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:52:46,209 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:52:46,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:52:46,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:52:46,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:52:46,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:52:46" (1/1) ... [2021-10-13 00:52:46,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a255c36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:46, skipping insertion in model container [2021-10-13 00:52:46,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:52:46" (1/1) ... [2021-10-13 00:52:46,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:52:46,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:52:46,646 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/sv-benchmarks/c/forester-heap/dll-reverse.i[22309,22322] [2021-10-13 00:52:46,650 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/sv-benchmarks/c/forester-heap/dll-reverse.i[22394,22407] [2021-10-13 00:52:46,656 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/sv-benchmarks/c/forester-heap/dll-reverse.i[22924,22937] [2021-10-13 00:52:46,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:52:46,668 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:52:46,704 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/sv-benchmarks/c/forester-heap/dll-reverse.i[22309,22322] [2021-10-13 00:52:46,706 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/sv-benchmarks/c/forester-heap/dll-reverse.i[22394,22407] [2021-10-13 00:52:46,711 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/sv-benchmarks/c/forester-heap/dll-reverse.i[22924,22937] [2021-10-13 00:52:46,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:52:46,742 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:52:46,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:46 WrapperNode [2021-10-13 00:52:46,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:52:46,744 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:52:46,744 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:52:46,744 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:52:46,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:46" (1/1) ... [2021-10-13 00:52:46,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:46" (1/1) ... [2021-10-13 00:52:46,790 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:52:46,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:52:46,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:52:46,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:52:46,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:46" (1/1) ... [2021-10-13 00:52:46,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:46" (1/1) ... [2021-10-13 00:52:46,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:46" (1/1) ... [2021-10-13 00:52:46,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:46" (1/1) ... [2021-10-13 00:52:46,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:46" (1/1) ... [2021-10-13 00:52:46,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:46" (1/1) ... [2021-10-13 00:52:46,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:46" (1/1) ... [2021-10-13 00:52:46,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:52:46,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:52:46,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:52:46,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:52:46,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:46" (1/1) ... [2021-10-13 00:52:46,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:52:46,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:52:46,863 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:52:46,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:52:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 00:52:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 00:52:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 00:52:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 00:52:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:52:46,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 00:52:46,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 00:52:46,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:52:46,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:52:46,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:52:47,575 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:52:47,575 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-13 00:52:47,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:52:47 BoogieIcfgContainer [2021-10-13 00:52:47,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:52:47,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:52:47,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:52:47,585 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:52:47,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:52:46" (1/3) ... [2021-10-13 00:52:47,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf391b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:52:47, skipping insertion in model container [2021-10-13 00:52:47,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:46" (2/3) ... [2021-10-13 00:52:47,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf391b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:52:47, skipping insertion in model container [2021-10-13 00:52:47,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:52:47" (3/3) ... [2021-10-13 00:52:47,590 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-reverse.i [2021-10-13 00:52:47,597 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:52:47,597 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-13 00:52:47,682 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:52:47,700 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=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 00:52:47,700 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 00:52:47,718 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 36 states have internal predecessors, (59), 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) [2021-10-13 00:52:47,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 00:52:47,724 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:47,725 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:47,726 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:52:47,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:47,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1813527409, now seen corresponding path program 1 times [2021-10-13 00:52:47,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:52:47,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764358496] [2021-10-13 00:52:47,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:47,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:52:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:52:47,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:52:47,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764358496] [2021-10-13 00:52:47,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764358496] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:52:47,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:52:47,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 00:52:47,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926033558] [2021-10-13 00:52:47,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 00:52:47,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:52:47,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 00:52:47,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 00:52:47,919 INFO L87 Difference]: Start difference. First operand has 37 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 36 states have internal predecessors, (59), 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-10-13 00:52:47,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:52:47,934 INFO L93 Difference]: Finished difference Result 70 states and 112 transitions. [2021-10-13 00:52:47,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 00:52:47,936 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) Word has length 7 [2021-10-13 00:52:47,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:52:47,944 INFO L225 Difference]: With dead ends: 70 [2021-10-13 00:52:47,944 INFO L226 Difference]: Without dead ends: 31 [2021-10-13 00:52:47,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 00:52:47,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-13 00:52:47,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-13 00:52:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 30 states have internal predecessors, (38), 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) [2021-10-13 00:52:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-10-13 00:52:47,975 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 7 [2021-10-13 00:52:47,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:52:47,976 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-10-13 00:52:47,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-10-13 00:52:47,976 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-10-13 00:52:47,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 00:52:47,977 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:47,977 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:47,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 00:52:47,978 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:52:47,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:47,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1038813004, now seen corresponding path program 1 times [2021-10-13 00:52:47,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:52:47,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108230632] [2021-10-13 00:52:47,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:47,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:52:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:52:48,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:52:48,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108230632] [2021-10-13 00:52:48,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108230632] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:52:48,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:52:48,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:52:48,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054818281] [2021-10-13 00:52:48,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:52:48,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:52:48,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:52:48,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:52:48,099 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-10-13 00:52:48,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:52:48,342 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2021-10-13 00:52:48,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:52:48,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) Word has length 10 [2021-10-13 00:52:48,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:52:48,345 INFO L225 Difference]: With dead ends: 71 [2021-10-13 00:52:48,345 INFO L226 Difference]: Without dead ends: 45 [2021-10-13 00:52:48,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:52:48,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-13 00:52:48,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2021-10-13 00:52:48,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 36 states have internal predecessors, (45), 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) [2021-10-13 00:52:48,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-10-13 00:52:48,354 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 10 [2021-10-13 00:52:48,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:52:48,355 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-10-13 00:52:48,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-10-13 00:52:48,355 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-10-13 00:52:48,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 00:52:48,356 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:48,356 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:48,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 00:52:48,357 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:52:48,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:48,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1038754672, now seen corresponding path program 1 times [2021-10-13 00:52:48,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:52:48,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451784520] [2021-10-13 00:52:48,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:48,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:52:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:52:48,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:52:48,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451784520] [2021-10-13 00:52:48,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451784520] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:52:48,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:52:48,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:52:48,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477065190] [2021-10-13 00:52:48,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:52:48,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:52:48,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:52:48,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:52:48,490 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-13 00:52:48,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:52:48,613 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2021-10-13 00:52:48,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:52:48,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) Word has length 10 [2021-10-13 00:52:48,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:52:48,626 INFO L225 Difference]: With dead ends: 64 [2021-10-13 00:52:48,626 INFO L226 Difference]: Without dead ends: 50 [2021-10-13 00:52:48,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:52:48,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-13 00:52:48,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-10-13 00:52:48,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 43 states have internal predecessors, (54), 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) [2021-10-13 00:52:48,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2021-10-13 00:52:48,635 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 10 [2021-10-13 00:52:48,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:52:48,636 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2021-10-13 00:52:48,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-13 00:52:48,636 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2021-10-13 00:52:48,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 00:52:48,637 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:48,638 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:48,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 00:52:48,638 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:52:48,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:48,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1414194791, now seen corresponding path program 1 times [2021-10-13 00:52:48,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:52:48,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594896532] [2021-10-13 00:52:48,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:48,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:52:48,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 00:52:48,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:52:48,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594896532] [2021-10-13 00:52:48,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594896532] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:52:48,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129907290] [2021-10-13 00:52:48,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:48,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:52:48,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:52:48,782 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:52:48,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 00:52:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:48,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 00:52:48,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:52:49,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-10-13 00:52:49,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-10-13 00:52:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 00:52:49,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129907290] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:52:49,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:52:49,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-13 00:52:49,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244993340] [2021-10-13 00:52:49,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:52:49,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:52:49,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:52:49,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:52:49,339 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-10-13 00:52:49,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:52:49,593 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2021-10-13 00:52:49,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:52:49,593 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) Word has length 18 [2021-10-13 00:52:49,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:52:49,596 INFO L225 Difference]: With dead ends: 50 [2021-10-13 00:52:49,596 INFO L226 Difference]: Without dead ends: 46 [2021-10-13 00:52:49,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:52:49,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-13 00:52:49,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2021-10-13 00:52:49,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 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) [2021-10-13 00:52:49,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-10-13 00:52:49,604 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 18 [2021-10-13 00:52:49,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:52:49,604 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-10-13 00:52:49,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-10-13 00:52:49,605 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-10-13 00:52:49,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 00:52:49,606 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:49,606 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:49,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:52:49,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:52:49,826 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:52:49,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:49,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1635066921, now seen corresponding path program 1 times [2021-10-13 00:52:49,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:52:49,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352725366] [2021-10-13 00:52:49,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:49,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:52:49,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:52:49,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:52:49,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352725366] [2021-10-13 00:52:49,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352725366] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:52:49,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118363131] [2021-10-13 00:52:49,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:49,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:52:49,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:52:49,970 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:52:49,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 00:52:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:50,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-13 00:52:50,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:52:50,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:52:50,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:50,373 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-10-13 00:52:50,374 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 3 case distinctions, treesize of input 56 treesize of output 45 [2021-10-13 00:52:50,389 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 00:52:50,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 54 [2021-10-13 00:52:50,674 INFO L354 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2021-10-13 00:52:50,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 38 [2021-10-13 00:52:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:52:50,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118363131] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:52:50,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:52:50,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-13 00:52:50,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520308586] [2021-10-13 00:52:50,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 00:52:50,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:52:50,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 00:52:50,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:52:50,731 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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) [2021-10-13 00:52:51,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:52:51,584 INFO L93 Difference]: Finished difference Result 114 states and 141 transitions. [2021-10-13 00:52:51,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 00:52:51,586 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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) Word has length 20 [2021-10-13 00:52:51,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:52:51,588 INFO L225 Difference]: With dead ends: 114 [2021-10-13 00:52:51,588 INFO L226 Difference]: Without dead ends: 104 [2021-10-13 00:52:51,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 511.0ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-10-13 00:52:51,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-13 00:52:51,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 55. [2021-10-13 00:52:51,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 54 states have internal predecessors, (70), 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) [2021-10-13 00:52:51,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2021-10-13 00:52:51,602 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 20 [2021-10-13 00:52:51,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:52:51,603 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2021-10-13 00:52:51,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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) [2021-10-13 00:52:51,603 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2021-10-13 00:52:51,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 00:52:51,604 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:51,605 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:51,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:52:51,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:52:51,818 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:52:51,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:51,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1979842005, now seen corresponding path program 1 times [2021-10-13 00:52:51,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:52:51,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799355668] [2021-10-13 00:52:51,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:51,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:52:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:52:51,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:52:51,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799355668] [2021-10-13 00:52:51,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799355668] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:52:51,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:52:51,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:52:51,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287109817] [2021-10-13 00:52:51,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:52:51,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:52:51,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:52:51,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:52:51,929 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2021-10-13 00:52:52,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:52:52,084 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2021-10-13 00:52:52,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:52:52,084 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) Word has length 20 [2021-10-13 00:52:52,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:52:52,089 INFO L225 Difference]: With dead ends: 75 [2021-10-13 00:52:52,089 INFO L226 Difference]: Without dead ends: 62 [2021-10-13 00:52:52,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:52:52,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-13 00:52:52,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-10-13 00:52:52,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.271186440677966) internal successors, (75), 59 states have internal predecessors, (75), 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) [2021-10-13 00:52:52,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2021-10-13 00:52:52,112 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 20 [2021-10-13 00:52:52,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:52:52,114 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2021-10-13 00:52:52,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2021-10-13 00:52:52,115 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2021-10-13 00:52:52,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 00:52:52,116 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:52,116 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:52,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 00:52:52,117 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:52:52,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:52,118 INFO L82 PathProgramCache]: Analyzing trace with hash 742290787, now seen corresponding path program 2 times [2021-10-13 00:52:52,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:52:52,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119848916] [2021-10-13 00:52:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:52,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:52:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:52:52,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:52:52,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119848916] [2021-10-13 00:52:52,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119848916] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:52:52,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752846827] [2021-10-13 00:52:52,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:52:52,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:52:52,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:52:52,460 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:52:52,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 00:52:52,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:52:52,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:52:52,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-13 00:52:52,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:52:52,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:52:52,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 00:52:52,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:53,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:53,113 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-10-13 00:52:53,114 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 3 case distinctions, treesize of input 119 treesize of output 108 [2021-10-13 00:52:53,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:53,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:53,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:53,235 INFO L354 Elim1Store]: treesize reduction 237, result has 16.8 percent of original size [2021-10-13 00:52:53,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 98 treesize of output 109 [2021-10-13 00:52:53,253 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 00:52:53,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 88 [2021-10-13 00:52:53,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:53,628 INFO L354 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2021-10-13 00:52:53,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 86 [2021-10-13 00:52:53,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:53,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:53,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:53,666 INFO L354 Elim1Store]: treesize reduction 97, result has 8.5 percent of original size [2021-10-13 00:52:53,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 56 [2021-10-13 00:52:53,787 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-13 00:52:53,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 95 [2021-10-13 00:52:53,812 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-13 00:52:53,812 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 1 case distinctions, treesize of input 87 treesize of output 87 [2021-10-13 00:52:53,852 INFO L354 Elim1Store]: treesize reduction 102, result has 24.4 percent of original size [2021-10-13 00:52:53,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 80 [2021-10-13 00:52:53,885 INFO L354 Elim1Store]: treesize reduction 114, result has 22.4 percent of original size [2021-10-13 00:52:53,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 67 [2021-10-13 00:52:54,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-10-13 00:52:54,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-10-13 00:52:54,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-13 00:52:54,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:52:54,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752846827] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:52:54,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:52:54,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-10-13 00:52:54,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404443534] [2021-10-13 00:52:54,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 00:52:54,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:52:54,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 00:52:54,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-10-13 00:52:54,059 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 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) [2021-10-13 00:52:54,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:52:54,802 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2021-10-13 00:52:54,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 00:52:54,803 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 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) Word has length 21 [2021-10-13 00:52:54,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:52:54,804 INFO L225 Difference]: With dead ends: 97 [2021-10-13 00:52:54,804 INFO L226 Difference]: Without dead ends: 95 [2021-10-13 00:52:54,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 470.7ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-10-13 00:52:54,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-13 00:52:54,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2021-10-13 00:52:54,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 67 states have internal predecessors, (85), 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) [2021-10-13 00:52:54,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2021-10-13 00:52:54,816 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 21 [2021-10-13 00:52:54,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:52:54,816 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2021-10-13 00:52:54,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 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) [2021-10-13 00:52:54,817 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2021-10-13 00:52:54,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 00:52:54,823 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:54,824 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:54,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:52:55,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-13 00:52:55,046 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:52:55,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:55,046 INFO L82 PathProgramCache]: Analyzing trace with hash 742292709, now seen corresponding path program 1 times [2021-10-13 00:52:55,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:52:55,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772557688] [2021-10-13 00:52:55,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:55,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:52:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 00:52:55,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:52:55,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772557688] [2021-10-13 00:52:55,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772557688] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:52:55,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:52:55,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:52:55,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735493740] [2021-10-13 00:52:55,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:52:55,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:52:55,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:52:55,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:52:55,087 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-10-13 00:52:55,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:52:55,105 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2021-10-13 00:52:55,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:52:55,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) Word has length 21 [2021-10-13 00:52:55,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:52:55,107 INFO L225 Difference]: With dead ends: 76 [2021-10-13 00:52:55,107 INFO L226 Difference]: Without dead ends: 74 [2021-10-13 00:52:55,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:52:55,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-13 00:52:55,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2021-10-13 00:52:55,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 67 states have internal predecessors, (85), 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) [2021-10-13 00:52:55,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2021-10-13 00:52:55,125 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 21 [2021-10-13 00:52:55,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:52:55,125 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2021-10-13 00:52:55,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-10-13 00:52:55,126 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2021-10-13 00:52:55,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 00:52:55,127 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:55,128 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:55,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 00:52:55,128 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:52:55,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:55,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1163965591, now seen corresponding path program 3 times [2021-10-13 00:52:55,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:52:55,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870160026] [2021-10-13 00:52:55,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:55,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:52:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:52:55,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:52:55,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870160026] [2021-10-13 00:52:55,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870160026] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:52:55,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761488886] [2021-10-13 00:52:55,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:52:55,358 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:52:55,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:52:55,359 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:52:55,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 00:52:55,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 00:52:55,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:52:55,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-13 00:52:55,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:52:55,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:52:56,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:56,077 INFO L354 Elim1Store]: treesize reduction 642, result has 7.2 percent of original size [2021-10-13 00:52:56,077 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 3 case distinctions, treesize of input 261 treesize of output 185 [2021-10-13 00:52:56,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:56,091 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:52:56,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 66 [2021-10-13 00:52:56,101 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 00:52:56,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 66 [2021-10-13 00:52:56,272 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-10-13 00:52:56,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 106 treesize of output 91 [2021-10-13 00:52:56,295 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-10-13 00:52:56,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 75 [2021-10-13 00:52:56,389 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 00:52:56,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 45 [2021-10-13 00:52:56,396 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 00:52:56,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 20 [2021-10-13 00:52:56,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:52:56,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761488886] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:52:56,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:52:56,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-10-13 00:52:56,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845411399] [2021-10-13 00:52:56,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 00:52:56,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:52:56,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 00:52:56,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-10-13 00:52:56,452 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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) [2021-10-13 00:52:57,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:52:57,392 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2021-10-13 00:52:57,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 00:52:57,393 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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) Word has length 22 [2021-10-13 00:52:57,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:52:57,394 INFO L225 Difference]: With dead ends: 120 [2021-10-13 00:52:57,394 INFO L226 Difference]: Without dead ends: 86 [2021-10-13 00:52:57,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 458.0ms TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-10-13 00:52:57,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-13 00:52:57,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2021-10-13 00:52:57,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 74 states have internal predecessors, (92), 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) [2021-10-13 00:52:57,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2021-10-13 00:52:57,407 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 22 [2021-10-13 00:52:57,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:52:57,407 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2021-10-13 00:52:57,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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) [2021-10-13 00:52:57,408 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2021-10-13 00:52:57,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 00:52:57,409 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:57,409 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:57,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 00:52:57,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:52:57,626 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:52:57,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:57,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1210245850, now seen corresponding path program 1 times [2021-10-13 00:52:57,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:52:57,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994239972] [2021-10-13 00:52:57,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:57,627 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:52:57,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:52:58,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:52:58,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994239972] [2021-10-13 00:52:58,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994239972] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:52:58,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543015539] [2021-10-13 00:52:58,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:58,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:52:58,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:52:58,010 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:52:58,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 00:52:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:58,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-13 00:52:58,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:52:58,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:52:58,377 INFO L354 Elim1Store]: treesize reduction 544, result has 9.3 percent of original size [2021-10-13 00:52:58,377 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 3 case distinctions, treesize of input 319 treesize of output 220 [2021-10-13 00:52:58,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:58,426 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-10-13 00:52:58,427 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 3 case distinctions, treesize of input 79 treesize of output 68 [2021-10-13 00:52:58,435 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 00:52:58,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 81 [2021-10-13 00:52:59,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:59,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:59,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:59,624 INFO L354 Elim1Store]: treesize reduction 55, result has 11.3 percent of original size [2021-10-13 00:52:59,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 113 treesize of output 90 [2021-10-13 00:52:59,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:59,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:59,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:59,653 INFO L354 Elim1Store]: treesize reduction 71, result has 13.4 percent of original size [2021-10-13 00:52:59,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 94 treesize of output 84 [2021-10-13 00:52:59,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 00:52:59,879 INFO L354 Elim1Store]: treesize reduction 132, result has 19.5 percent of original size [2021-10-13 00:52:59,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2021-10-13 00:52:59,895 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-10-13 00:52:59,901 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 158 treesize of output 153 [2021-10-13 00:52:59,931 INFO L354 Elim1Store]: treesize reduction 122, result has 21.8 percent of original size [2021-10-13 00:52:59,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 142 [2021-10-13 00:53:00,511 INFO L354 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2021-10-13 00:53:00,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 140 [2021-10-13 00:53:00,523 INFO L354 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-10-13 00:53:00,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 134 treesize of output 106 [2021-10-13 00:53:00,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:00,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:00,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:00,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:00,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:53:00,561 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 00:53:00,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 76 [2021-10-13 00:53:00,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:00,664 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 65 treesize of output 65 [2021-10-13 00:53:00,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:00,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:00,679 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:53:00,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 32 [2021-10-13 00:53:00,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:00,689 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 17 [2021-10-13 00:53:00,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-10-13 00:53:00,845 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-10-13 00:53:00,849 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 24 [2021-10-13 00:53:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:53:00,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543015539] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:53:00,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:53:00,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-10-13 00:53:00,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933310232] [2021-10-13 00:53:00,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 00:53:00,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:53:00,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 00:53:00,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-10-13 00:53:00,863 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 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) [2021-10-13 00:53:02,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:53:02,701 INFO L93 Difference]: Finished difference Result 147 states and 178 transitions. [2021-10-13 00:53:02,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 00:53:02,706 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 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) Word has length 23 [2021-10-13 00:53:02,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:53:02,707 INFO L225 Difference]: With dead ends: 147 [2021-10-13 00:53:02,707 INFO L226 Difference]: Without dead ends: 145 [2021-10-13 00:53:02,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 945.4ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-10-13 00:53:02,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-13 00:53:02,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 75. [2021-10-13 00:53:02,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 74 states have internal predecessors, (94), 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) [2021-10-13 00:53:02,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2021-10-13 00:53:02,733 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 23 [2021-10-13 00:53:02,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:53:02,734 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2021-10-13 00:53:02,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 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) [2021-10-13 00:53:02,734 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2021-10-13 00:53:02,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 00:53:02,736 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:53:02,737 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:53:02,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 00:53:02,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:53:02,966 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:53:02,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:53:02,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1965376375, now seen corresponding path program 2 times [2021-10-13 00:53:02,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:53:02,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358460032] [2021-10-13 00:53:02,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:53:02,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:53:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:53:03,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:53:03,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358460032] [2021-10-13 00:53:03,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358460032] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:53:03,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868225419] [2021-10-13 00:53:03,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:53:03,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:53:03,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:53:03,301 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:53:03,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 00:53:03,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:53:03,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:53:03,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-13 00:53:03,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:53:03,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:53:03,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:03,772 INFO L354 Elim1Store]: treesize reduction 149, result has 17.2 percent of original size [2021-10-13 00:53:03,772 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 3 case distinctions, treesize of input 160 treesize of output 120 [2021-10-13 00:53:03,824 INFO L354 Elim1Store]: treesize reduction 180, result has 15.1 percent of original size [2021-10-13 00:53:03,825 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 3 case distinctions, treesize of input 145 treesize of output 90 [2021-10-13 00:53:03,843 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-10-13 00:53:03,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 94 [2021-10-13 00:53:04,684 INFO L354 Elim1Store]: treesize reduction 770, result has 11.8 percent of original size [2021-10-13 00:53:04,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 500 treesize of output 350 [2021-10-13 00:53:04,954 INFO L354 Elim1Store]: treesize reduction 1425, result has 8.2 percent of original size [2021-10-13 00:53:04,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 602 treesize of output 542 [2021-10-13 00:53:05,011 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-10-13 00:53:05,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 545 treesize of output 555 [2021-10-13 00:53:08,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:08,944 INFO L354 Elim1Store]: treesize reduction 37, result has 17.8 percent of original size [2021-10-13 00:53:08,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 95 treesize of output 53 [2021-10-13 00:53:09,087 INFO L354 Elim1Store]: treesize reduction 114, result has 18.0 percent of original size [2021-10-13 00:53:09,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 279 treesize of output 199 [2021-10-13 00:53:14,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:14,952 INFO L354 Elim1Store]: treesize reduction 121, result has 6.2 percent of original size [2021-10-13 00:53:14,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 203 treesize of output 159 [2021-10-13 00:53:16,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:16,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:16,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:16,549 INFO L354 Elim1Store]: treesize reduction 152, result has 9.0 percent of original size [2021-10-13 00:53:16,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 127 treesize of output 85 [2021-10-13 00:53:16,855 INFO L354 Elim1Store]: treesize reduction 270, result has 19.2 percent of original size [2021-10-13 00:53:16,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 147 treesize of output 136 [2021-10-13 00:53:16,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 110 [2021-10-13 00:53:17,200 INFO L354 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2021-10-13 00:53:17,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 43 [2021-10-13 00:53:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:53:17,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868225419] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:53:17,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:53:17,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-10-13 00:53:17,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304826487] [2021-10-13 00:53:17,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 00:53:17,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:53:17,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 00:53:17,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-10-13 00:53:17,240 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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) [2021-10-13 00:53:36,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:53:36,443 INFO L93 Difference]: Finished difference Result 158 states and 195 transitions. [2021-10-13 00:53:36,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 00:53:36,443 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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) Word has length 24 [2021-10-13 00:53:36,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:53:36,444 INFO L225 Difference]: With dead ends: 158 [2021-10-13 00:53:36,445 INFO L226 Difference]: Without dead ends: 130 [2021-10-13 00:53:36,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 2306.7ms TimeCoverageRelationStatistics Valid=359, Invalid=1362, Unknown=1, NotChecked=0, Total=1722 [2021-10-13 00:53:36,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-13 00:53:36,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 80. [2021-10-13 00:53:36,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2531645569620253) internal successors, (99), 79 states have internal predecessors, (99), 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) [2021-10-13 00:53:36,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2021-10-13 00:53:36,456 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 24 [2021-10-13 00:53:36,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:53:36,457 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2021-10-13 00:53:36,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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) [2021-10-13 00:53:36,457 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2021-10-13 00:53:36,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 00:53:36,458 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:53:36,459 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:53:36,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 00:53:36,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-13 00:53:36,686 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:53:36,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:53:36,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1564160201, now seen corresponding path program 3 times [2021-10-13 00:53:36,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:53:36,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155987553] [2021-10-13 00:53:36,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:53:36,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:53:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:53:37,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:53:37,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155987553] [2021-10-13 00:53:37,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155987553] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:53:37,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562035027] [2021-10-13 00:53:37,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:53:37,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:53:37,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:53:37,280 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:53:37,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 00:53:38,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 00:53:38,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:53:38,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 79 conjunts are in the unsatisfiable core [2021-10-13 00:53:38,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:53:38,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:53:38,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:38,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:38,591 INFO L354 Elim1Store]: treesize reduction 158, result has 12.2 percent of original size [2021-10-13 00:53:38,592 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 3 case distinctions, treesize of input 191 treesize of output 142 [2021-10-13 00:53:38,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:38,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:53:38,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:38,637 INFO L354 Elim1Store]: treesize reduction 138, result has 13.8 percent of original size [2021-10-13 00:53:38,637 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 3 case distinctions, treesize of input 82 treesize of output 62 [2021-10-13 00:53:38,684 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 00:53:38,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-10-13 00:53:38,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:53:38,994 INFO L354 Elim1Store]: treesize reduction 448, result has 7.4 percent of original size [2021-10-13 00:53:38,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 546 treesize of output 356 [2021-10-13 00:53:38,999 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 540 treesize of output 528 [2021-10-13 00:53:39,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:53:39,024 INFO L354 Elim1Store]: treesize reduction 166, result has 15.3 percent of original size [2021-10-13 00:53:39,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 202 treesize of output 164 [2021-10-13 00:53:39,033 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-10-13 00:53:39,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 149 [2021-10-13 00:53:39,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:39,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:39,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:39,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:39,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:53:39,615 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-13 00:53:39,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 183 treesize of output 129 [2021-10-13 00:53:39,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:53:39,632 INFO L354 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2021-10-13 00:53:39,632 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 164 treesize of output 163 [2021-10-13 00:53:39,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:39,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:39,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:39,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:39,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:53:39,647 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-10-13 00:53:39,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 160 treesize of output 156 [2021-10-13 00:53:39,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:53:39,852 INFO L354 Elim1Store]: treesize reduction 246, result has 12.8 percent of original size [2021-10-13 00:53:39,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 232 treesize of output 169 [2021-10-13 00:53:39,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:53:39,880 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-10-13 00:53:39,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 162 [2021-10-13 00:53:39,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:53:39,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:53:39,934 INFO L354 Elim1Store]: treesize reduction 230, result has 16.1 percent of original size [2021-10-13 00:53:39,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 156 treesize of output 154 [2021-10-13 00:53:42,357 INFO L354 Elim1Store]: treesize reduction 296, result has 10.8 percent of original size [2021-10-13 00:53:42,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 16 case distinctions, treesize of input 435 treesize of output 243 [2021-10-13 00:53:42,445 INFO L354 Elim1Store]: treesize reduction 568, result has 8.4 percent of original size [2021-10-13 00:53:42,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 369 treesize of output 255 [2021-10-13 00:53:42,536 INFO L354 Elim1Store]: treesize reduction 706, result has 8.7 percent of original size [2021-10-13 00:53:42,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 261 treesize of output 223 [2021-10-13 00:53:46,867 INFO L354 Elim1Store]: treesize reduction 114, result has 2.6 percent of original size [2021-10-13 00:53:46,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 375 treesize of output 210 [2021-10-13 00:53:46,903 INFO L354 Elim1Store]: treesize reduction 114, result has 2.6 percent of original size [2021-10-13 00:53:46,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 167 treesize of output 90 [2021-10-13 00:53:46,932 INFO L354 Elim1Store]: treesize reduction 109, result has 7.6 percent of original size [2021-10-13 00:53:46,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 49 [2021-10-13 00:53:47,025 INFO L354 Elim1Store]: treesize reduction 71, result has 11.3 percent of original size [2021-10-13 00:53:47,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 54 [2021-10-13 00:53:47,045 INFO L354 Elim1Store]: treesize reduction 71, result has 11.3 percent of original size [2021-10-13 00:53:47,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 39 [2021-10-13 00:53:47,196 INFO L354 Elim1Store]: treesize reduction 24, result has 35.1 percent of original size [2021-10-13 00:53:47,197 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 37 treesize of output 31 [2021-10-13 00:53:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:53:47,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562035027] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:53:47,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:53:47,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-10-13 00:53:47,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735751818] [2021-10-13 00:53:47,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 00:53:47,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:53:47,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 00:53:47,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=358, Unknown=2, NotChecked=0, Total=420 [2021-10-13 00:53:47,207 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 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) [2021-10-13 00:54:02,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:02,043 INFO L93 Difference]: Finished difference Result 162 states and 198 transitions. [2021-10-13 00:54:02,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 00:54:02,044 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 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) Word has length 26 [2021-10-13 00:54:02,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:02,046 INFO L225 Difference]: With dead ends: 162 [2021-10-13 00:54:02,046 INFO L226 Difference]: Without dead ends: 152 [2021-10-13 00:54:02,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 9142.1ms TimeCoverageRelationStatistics Valid=118, Invalid=749, Unknown=3, NotChecked=0, Total=870 [2021-10-13 00:54:02,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-13 00:54:02,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 93. [2021-10-13 00:54:02,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.2608695652173914) internal successors, (116), 92 states have internal predecessors, (116), 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) [2021-10-13 00:54:02,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2021-10-13 00:54:02,060 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 26 [2021-10-13 00:54:02,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:02,060 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 116 transitions. [2021-10-13 00:54:02,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 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) [2021-10-13 00:54:02,061 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions. [2021-10-13 00:54:02,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 00:54:02,062 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:02,062 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:54:02,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 00:54:02,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:54:02,278 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:54:02,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:02,278 INFO L82 PathProgramCache]: Analyzing trace with hash 350497813, now seen corresponding path program 4 times [2021-10-13 00:54:02,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:02,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010758355] [2021-10-13 00:54:02,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:02,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:54:02,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:02,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010758355] [2021-10-13 00:54:02,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010758355] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:54:02,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140232271] [2021-10-13 00:54:02,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:54:02,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:54:02,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:54:02,667 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:54:02,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 00:54:05,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:54:05,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:54:05,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 83 conjunts are in the unsatisfiable core [2021-10-13 00:54:05,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:54:05,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:54:05,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:54:05,554 INFO L354 Elim1Store]: treesize reduction 158, result has 12.2 percent of original size [2021-10-13 00:54:05,555 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 3 case distinctions, treesize of input 191 treesize of output 142 [2021-10-13 00:54:05,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:54:05,610 INFO L354 Elim1Store]: treesize reduction 186, result has 12.3 percent of original size [2021-10-13 00:54:05,610 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 3 case distinctions, treesize of input 139 treesize of output 78 [2021-10-13 00:54:05,628 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-10-13 00:54:05,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 82 [2021-10-13 00:54:05,949 INFO L354 Elim1Store]: treesize reduction 448, result has 7.4 percent of original size [2021-10-13 00:54:05,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 485 treesize of output 315 [2021-10-13 00:54:05,992 INFO L354 Elim1Store]: treesize reduction 166, result has 15.3 percent of original size [2021-10-13 00:54:05,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 187 treesize of output 149 [2021-10-13 00:54:06,005 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-10-13 00:54:06,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 140 treesize of output 134 [2021-10-13 00:54:06,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:54:06,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:54:06,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:54:06,513 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-13 00:54:06,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 155 treesize of output 109 [2021-10-13 00:54:06,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:54:06,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:54:06,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:54:06,530 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-10-13 00:54:06,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 107 treesize of output 103 [2021-10-13 00:54:06,683 INFO L354 Elim1Store]: treesize reduction 246, result has 12.8 percent of original size [2021-10-13 00:54:06,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 195 treesize of output 140 [2021-10-13 00:54:06,736 INFO L354 Elim1Store]: treesize reduction 302, result has 16.6 percent of original size [2021-10-13 00:54:06,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 156 treesize of output 158 [2021-10-13 00:54:06,944 INFO L354 Elim1Store]: treesize reduction 92, result has 26.4 percent of original size [2021-10-13 00:54:06,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 163 treesize of output 129 [2021-10-13 00:54:06,986 INFO L354 Elim1Store]: treesize reduction 172, result has 17.7 percent of original size [2021-10-13 00:54:06,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 142 treesize of output 130 [2021-10-13 00:54:07,134 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-10-13 00:54:07,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 147 treesize of output 126 [2021-10-13 00:54:07,164 INFO L354 Elim1Store]: treesize reduction 116, result has 15.9 percent of original size [2021-10-13 00:54:07,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 134 treesize of output 111 [2021-10-13 00:54:07,284 INFO L354 Elim1Store]: treesize reduction 57, result has 12.3 percent of original size [2021-10-13 00:54:07,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 77 [2021-10-13 00:54:07,301 INFO L354 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2021-10-13 00:54:07,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 37 [2021-10-13 00:54:07,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:54:07,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140232271] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:54:07,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:54:07,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-10-13 00:54:07,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190519299] [2021-10-13 00:54:07,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 00:54:07,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:54:07,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 00:54:07,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-10-13 00:54:07,364 INFO L87 Difference]: Start difference. First operand 93 states and 116 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 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) [2021-10-13 00:54:09,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:09,071 INFO L93 Difference]: Finished difference Result 161 states and 198 transitions. [2021-10-13 00:54:09,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 00:54:09,071 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 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) Word has length 27 [2021-10-13 00:54:09,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:09,072 INFO L225 Difference]: With dead ends: 161 [2021-10-13 00:54:09,072 INFO L226 Difference]: Without dead ends: 127 [2021-10-13 00:54:09,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 679.0ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-10-13 00:54:09,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-13 00:54:09,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 99. [2021-10-13 00:54:09,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 98 states have internal predecessors, (123), 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) [2021-10-13 00:54:09,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2021-10-13 00:54:09,086 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 27 [2021-10-13 00:54:09,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:09,086 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2021-10-13 00:54:09,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 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) [2021-10-13 00:54:09,087 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2021-10-13 00:54:09,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 00:54:09,088 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:09,088 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:54:09,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 00:54:09,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-13 00:54:09,302 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:54:09,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:09,302 INFO L82 PathProgramCache]: Analyzing trace with hash 639440383, now seen corresponding path program 1 times [2021-10-13 00:54:09,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:09,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617333209] [2021-10-13 00:54:09,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:09,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:09,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:54:09,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:09,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617333209] [2021-10-13 00:54:09,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617333209] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:54:09,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784061118] [2021-10-13 00:54:09,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:09,489 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:54:09,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:54:09,494 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:54:09,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 00:54:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:09,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 58 conjunts are in the unsatisfiable core [2021-10-13 00:54:09,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:54:10,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:54:10,213 INFO L354 Elim1Store]: treesize reduction 544, result has 9.3 percent of original size [2021-10-13 00:54:10,214 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 3 case distinctions, treesize of input 319 treesize of output 220 [2021-10-13 00:54:10,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:54:10,267 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-10-13 00:54:10,268 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 3 case distinctions, treesize of input 79 treesize of output 68 [2021-10-13 00:54:10,276 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 00:54:10,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 81 [2021-10-13 00:54:10,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:54:10,540 INFO L354 Elim1Store]: treesize reduction 96, result has 13.5 percent of original size [2021-10-13 00:54:10,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 125 treesize of output 110 [2021-10-13 00:54:10,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:54:10,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:54:10,560 INFO L354 Elim1Store]: treesize reduction 96, result has 13.5 percent of original size [2021-10-13 00:54:10,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 98 treesize of output 92 [2021-10-13 00:54:10,759 INFO L354 Elim1Store]: treesize reduction 91, result has 28.9 percent of original size [2021-10-13 00:54:10,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 104 treesize of output 124 [2021-10-13 00:54:10,801 INFO L354 Elim1Store]: treesize reduction 138, result has 19.8 percent of original size [2021-10-13 00:54:10,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 125 treesize of output 134 [2021-10-13 00:54:11,183 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-10-13 00:54:11,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 52 [2021-10-13 00:54:11,207 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-13 00:54:11,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 26 [2021-10-13 00:54:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:54:11,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784061118] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:54:11,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:54:11,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-10-13 00:54:11,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648498209] [2021-10-13 00:54:11,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 00:54:11,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:54:11,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 00:54:11,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-10-13 00:54:11,221 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 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) [2021-10-13 00:54:14,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:14,742 INFO L93 Difference]: Finished difference Result 183 states and 221 transitions. [2021-10-13 00:54:14,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 00:54:14,742 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 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) Word has length 28 [2021-10-13 00:54:14,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:14,744 INFO L225 Difference]: With dead ends: 183 [2021-10-13 00:54:14,744 INFO L226 Difference]: Without dead ends: 169 [2021-10-13 00:54:14,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 853.7ms TimeCoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2021-10-13 00:54:14,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-13 00:54:14,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 111. [2021-10-13 00:54:14,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.2454545454545454) internal successors, (137), 110 states have internal predecessors, (137), 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) [2021-10-13 00:54:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 137 transitions. [2021-10-13 00:54:14,761 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 137 transitions. Word has length 28 [2021-10-13 00:54:14,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:14,762 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 137 transitions. [2021-10-13 00:54:14,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 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) [2021-10-13 00:54:14,762 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 137 transitions. [2021-10-13 00:54:14,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 00:54:14,763 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:14,763 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:54:14,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 00:54:14,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-13 00:54:14,980 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:54:14,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:14,980 INFO L82 PathProgramCache]: Analyzing trace with hash 696698685, now seen corresponding path program 1 times [2021-10-13 00:54:14,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:14,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484531146] [2021-10-13 00:54:14,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:14,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:15,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 00:54:15,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:15,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484531146] [2021-10-13 00:54:15,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484531146] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:54:15,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:54:15,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:54:15,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509323382] [2021-10-13 00:54:15,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:54:15,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:54:15,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:54:15,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:54:15,033 INFO L87 Difference]: Start difference. First operand 111 states and 137 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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) [2021-10-13 00:54:15,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:15,133 INFO L93 Difference]: Finished difference Result 142 states and 173 transitions. [2021-10-13 00:54:15,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:54:15,134 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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) Word has length 28 [2021-10-13 00:54:15,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:15,135 INFO L225 Difference]: With dead ends: 142 [2021-10-13 00:54:15,135 INFO L226 Difference]: Without dead ends: 120 [2021-10-13 00:54:15,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:54:15,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-13 00:54:15,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2021-10-13 00:54:15,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.2293577981651376) internal successors, (134), 109 states have internal predecessors, (134), 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) [2021-10-13 00:54:15,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 134 transitions. [2021-10-13 00:54:15,152 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 134 transitions. Word has length 28 [2021-10-13 00:54:15,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:15,153 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 134 transitions. [2021-10-13 00:54:15,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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) [2021-10-13 00:54:15,153 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 134 transitions. [2021-10-13 00:54:15,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 00:54:15,154 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:15,154 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:54:15,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-13 00:54:15,155 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:54:15,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:15,155 INFO L82 PathProgramCache]: Analyzing trace with hash 303671675, now seen corresponding path program 1 times [2021-10-13 00:54:15,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:15,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347279858] [2021-10-13 00:54:15,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:15,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:54:15,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:15,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347279858] [2021-10-13 00:54:15,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347279858] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:54:15,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836071935] [2021-10-13 00:54:15,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:15,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:54:15,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:54:15,373 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:54:15,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 00:54:15,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:15,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-13 00:54:15,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:54:15,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:54:16,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 00:54:16,336 INFO L354 Elim1Store]: treesize reduction 544, result has 9.3 percent of original size [2021-10-13 00:54:16,336 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 3 case distinctions, treesize of input 526 treesize of output 427 [2021-10-13 00:54:16,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:54:16,415 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-10-13 00:54:16,415 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 3 case distinctions, treesize of input 146 treesize of output 135 [2021-10-13 00:54:16,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:54:16,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:54:16,472 INFO L354 Elim1Store]: treesize reduction 237, result has 16.8 percent of original size [2021-10-13 00:54:16,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 133 treesize of output 144 [2021-10-13 00:54:16,486 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 00:54:16,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 123 [2021-10-13 00:54:16,847 INFO L354 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2021-10-13 00:54:16,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 120 [2021-10-13 00:54:16,867 INFO L354 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-10-13 00:54:16,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 95 [2021-10-13 00:54:16,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:54:16,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:54:16,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:54:16,886 INFO L354 Elim1Store]: treesize reduction 97, result has 8.5 percent of original size [2021-10-13 00:54:16,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 68 [2021-10-13 00:54:16,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:54:16,956 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 71 treesize of output 71 [2021-10-13 00:54:16,975 INFO L354 Elim1Store]: treesize reduction 39, result has 27.8 percent of original size [2021-10-13 00:54:16,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 60 [2021-10-13 00:54:16,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:54:16,992 INFO L354 Elim1Store]: treesize reduction 45, result has 25.0 percent of original size [2021-10-13 00:54:16,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 47 [2021-10-13 00:54:17,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:54:17,004 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 17 [2021-10-13 00:54:17,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-10-13 00:54:17,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-10-13 00:54:17,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 00:54:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:54:17,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836071935] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:54:17,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:54:17,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 00:54:17,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265470678] [2021-10-13 00:54:17,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 00:54:17,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:54:17,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 00:54:17,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-10-13 00:54:17,194 INFO L87 Difference]: Start difference. First operand 110 states and 134 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 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) [2021-10-13 00:54:17,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:17,905 INFO L93 Difference]: Finished difference Result 162 states and 191 transitions. [2021-10-13 00:54:17,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 00:54:17,906 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 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) Word has length 28 [2021-10-13 00:54:17,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:17,907 INFO L225 Difference]: With dead ends: 162 [2021-10-13 00:54:17,907 INFO L226 Difference]: Without dead ends: 149 [2021-10-13 00:54:17,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 477.4ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-10-13 00:54:17,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-13 00:54:17,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 124. [2021-10-13 00:54:17,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.2032520325203253) internal successors, (148), 123 states have internal predecessors, (148), 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) [2021-10-13 00:54:17,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2021-10-13 00:54:17,929 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 28 [2021-10-13 00:54:17,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:17,930 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2021-10-13 00:54:17,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 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) [2021-10-13 00:54:17,930 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2021-10-13 00:54:17,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 00:54:17,931 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:17,931 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:54:17,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 00:54:18,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-13 00:54:18,142 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:54:18,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:18,142 INFO L82 PathProgramCache]: Analyzing trace with hash -2028717346, now seen corresponding path program 1 times [2021-10-13 00:54:18,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:18,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010571891] [2021-10-13 00:54:18,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:18,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 00:54:18,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:18,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010571891] [2021-10-13 00:54:18,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010571891] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:54:18,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:54:18,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:54:18,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127425926] [2021-10-13 00:54:18,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:54:18,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:54:18,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:54:18,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:54:18,208 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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) [2021-10-13 00:54:18,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:18,304 INFO L93 Difference]: Finished difference Result 169 states and 199 transitions. [2021-10-13 00:54:18,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:54:18,305 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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) Word has length 28 [2021-10-13 00:54:18,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:18,306 INFO L225 Difference]: With dead ends: 169 [2021-10-13 00:54:18,306 INFO L226 Difference]: Without dead ends: 137 [2021-10-13 00:54:18,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:54:18,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-10-13 00:54:18,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-10-13 00:54:18,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.1764705882352942) internal successors, (160), 136 states have internal predecessors, (160), 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) [2021-10-13 00:54:18,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 160 transitions. [2021-10-13 00:54:18,323 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 160 transitions. Word has length 28 [2021-10-13 00:54:18,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:18,323 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 160 transitions. [2021-10-13 00:54:18,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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) [2021-10-13 00:54:18,324 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 160 transitions. [2021-10-13 00:54:18,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 00:54:18,324 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:18,325 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:54:18,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-13 00:54:18,325 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:54:18,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:18,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1348658976, now seen corresponding path program 1 times [2021-10-13 00:54:18,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:18,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329969098] [2021-10-13 00:54:18,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:18,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:18,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:54:18,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:18,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329969098] [2021-10-13 00:54:18,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329969098] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:54:18,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58711684] [2021-10-13 00:54:18,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:18,469 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:54:18,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:54:18,470 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:54:18,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 00:54:19,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:19,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-13 00:54:19,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:54:19,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:54:19,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:54:19,165 INFO L354 Elim1Store]: treesize reduction 642, result has 7.2 percent of original size [2021-10-13 00:54:19,165 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 3 case distinctions, treesize of input 261 treesize of output 185 [2021-10-13 00:54:19,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:54:19,177 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:54:19,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 66 [2021-10-13 00:54:19,182 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 00:54:19,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 66 [2021-10-13 00:54:19,647 INFO L354 Elim1Store]: treesize reduction 130, result has 14.5 percent of original size [2021-10-13 00:54:19,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 168 treesize of output 128 [2021-10-13 00:54:19,660 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-10-13 00:54:19,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 129 treesize of output 79 [2021-10-13 00:54:19,668 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 00:54:19,669 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 49 treesize of output 37 [2021-10-13 00:54:19,681 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-10-13 00:54:19,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 46 [2021-10-13 00:54:19,702 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 37 treesize of output 27 [2021-10-13 00:54:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:54:19,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58711684] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:54:19,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:54:19,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-13 00:54:19,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910074819] [2021-10-13 00:54:19,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 00:54:19,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:54:19,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 00:54:19,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:54:19,745 INFO L87 Difference]: Start difference. First operand 137 states and 160 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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) [2021-10-13 00:54:24,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:24,510 INFO L93 Difference]: Finished difference Result 173 states and 201 transitions. [2021-10-13 00:54:24,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 00:54:24,511 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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) Word has length 28 [2021-10-13 00:54:24,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:24,512 INFO L225 Difference]: With dead ends: 173 [2021-10-13 00:54:24,512 INFO L226 Difference]: Without dead ends: 151 [2021-10-13 00:54:24,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 305.6ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-10-13 00:54:24,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-10-13 00:54:24,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2021-10-13 00:54:24,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.1643835616438356) internal successors, (170), 146 states have internal predecessors, (170), 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) [2021-10-13 00:54:24,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 170 transitions. [2021-10-13 00:54:24,531 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 170 transitions. Word has length 28 [2021-10-13 00:54:24,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:24,531 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 170 transitions. [2021-10-13 00:54:24,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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) [2021-10-13 00:54:24,531 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 170 transitions. [2021-10-13 00:54:24,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 00:54:24,532 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:24,532 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:54:24,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 00:54:24,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-13 00:54:24,746 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:54:24,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:24,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1255132700, now seen corresponding path program 1 times [2021-10-13 00:54:24,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:24,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128442261] [2021-10-13 00:54:24,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:24,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:54:24,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:24,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128442261] [2021-10-13 00:54:24,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128442261] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:54:24,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15871681] [2021-10-13 00:54:24,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:24,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:54:24,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:54:24,935 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:54:24,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 00:54:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:25,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-13 00:54:25,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:54:25,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:54:25,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:54:25,553 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-10-13 00:54:25,553 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 3 case distinctions, treesize of input 62 treesize of output 51 [2021-10-13 00:54:25,565 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-10-13 00:54:25,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 68 [2021-10-13 00:54:26,474 INFO L354 Elim1Store]: treesize reduction 102, result has 29.2 percent of original size [2021-10-13 00:54:26,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 76 [2021-10-13 00:54:26,909 INFO L354 Elim1Store]: treesize reduction 907, result has 12.2 percent of original size [2021-10-13 00:54:26,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 289 treesize of output 226 [2021-10-13 00:54:26,930 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-10-13 00:54:26,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 345 treesize of output 355 [2021-10-13 00:54:29,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:54:29,280 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-10-13 00:54:29,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 213 treesize of output 191 [2021-10-13 00:54:38,674 INFO L354 Elim1Store]: treesize reduction 78, result has 25.7 percent of original size [2021-10-13 00:54:38,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 142 treesize of output 90 [2021-10-13 00:54:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:54:38,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15871681] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:54:38,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:54:38,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-13 00:54:38,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117866053] [2021-10-13 00:54:38,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 00:54:38,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:54:38,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 00:54:38,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=217, Unknown=4, NotChecked=0, Total=272 [2021-10-13 00:54:38,715 INFO L87 Difference]: Start difference. First operand 147 states and 170 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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) [2021-10-13 00:56:34,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:56:34,057 INFO L93 Difference]: Finished difference Result 201 states and 230 transitions. [2021-10-13 00:56:34,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 00:56:34,058 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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) Word has length 28 [2021-10-13 00:56:34,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:56:34,059 INFO L225 Difference]: With dead ends: 201 [2021-10-13 00:56:34,059 INFO L226 Difference]: Without dead ends: 187 [2021-10-13 00:56:34,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 40964.5ms TimeCoverageRelationStatistics Valid=208, Invalid=763, Unknown=21, NotChecked=0, Total=992 [2021-10-13 00:56:34,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-10-13 00:56:34,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 159. [2021-10-13 00:56:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.1645569620253164) internal successors, (184), 158 states have internal predecessors, (184), 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) [2021-10-13 00:56:34,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 184 transitions. [2021-10-13 00:56:34,077 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 184 transitions. Word has length 28 [2021-10-13 00:56:34,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:56:34,077 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 184 transitions. [2021-10-13 00:56:34,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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) [2021-10-13 00:56:34,077 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 184 transitions. [2021-10-13 00:56:34,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 00:56:34,078 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:56:34,078 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:56:34,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 00:56:34,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:56:34,290 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:56:34,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:56:34,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1010437212, now seen corresponding path program 5 times [2021-10-13 00:56:34,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:56:34,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906577135] [2021-10-13 00:56:34,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:56:34,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:56:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:56:34,674 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:56:34,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:56:34,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906577135] [2021-10-13 00:56:34,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906577135] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:56:34,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662570951] [2021-10-13 00:56:34,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:56:34,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:56:34,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:56:34,675 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:56:34,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 00:56:36,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 00:56:36,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:56:36,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 83 conjunts are in the unsatisfiable core [2021-10-13 00:56:36,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:56:36,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:56:36,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:56:36,970 INFO L354 Elim1Store]: treesize reduction 158, result has 12.2 percent of original size [2021-10-13 00:56:36,970 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 3 case distinctions, treesize of input 191 treesize of output 142 [2021-10-13 00:56:36,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:56:36,998 INFO L354 Elim1Store]: treesize reduction 158, result has 12.2 percent of original size [2021-10-13 00:56:36,998 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 3 case distinctions, treesize of input 114 treesize of output 65 [2021-10-13 00:56:37,009 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 00:56:37,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-10-13 00:56:37,220 INFO L354 Elim1Store]: treesize reduction 360, result has 9.1 percent of original size [2021-10-13 00:56:37,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 351 treesize of output 195 [2021-10-13 00:56:37,288 INFO L354 Elim1Store]: treesize reduction 428, result has 9.3 percent of original size [2021-10-13 00:56:37,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 163 treesize of output 129 [2021-10-13 00:56:37,308 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-13 00:56:37,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 127 [2021-10-13 00:56:37,614 INFO L354 Elim1Store]: treesize reduction 549, result has 9.7 percent of original size [2021-10-13 00:56:37,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 307 treesize of output 178 [2021-10-13 00:56:37,777 INFO L354 Elim1Store]: treesize reduction 1432, result has 6.8 percent of original size [2021-10-13 00:56:37,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 18 case distinctions, treesize of input 326 treesize of output 276 [2021-10-13 00:56:37,798 INFO L354 Elim1Store]: treesize reduction 60, result has 50.4 percent of original size [2021-10-13 00:56:37,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 261 treesize of output 289 [2021-10-13 00:56:39,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:56:39,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:56:39,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:56:39,055 INFO L354 Elim1Store]: treesize reduction 151, result has 4.4 percent of original size [2021-10-13 00:56:39,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 22 case distinctions, treesize of input 303 treesize of output 170 [2021-10-13 00:56:39,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:56:39,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:56:39,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:56:39,089 INFO L354 Elim1Store]: treesize reduction 343, result has 5.2 percent of original size [2021-10-13 00:56:39,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 284 treesize of output 286 [2021-10-13 00:56:39,315 INFO L354 Elim1Store]: treesize reduction 422, result has 10.6 percent of original size [2021-10-13 00:56:39,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 343 treesize of output 201 [2021-10-13 00:56:39,389 INFO L354 Elim1Store]: treesize reduction 462, result has 12.5 percent of original size [2021-10-13 00:56:39,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 211 treesize of output 219 [2021-10-13 00:56:39,988 INFO L354 Elim1Store]: treesize reduction 242, result has 17.4 percent of original size [2021-10-13 00:56:39,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 27 case distinctions, treesize of input 315 treesize of output 194 [2021-10-13 00:56:40,057 INFO L354 Elim1Store]: treesize reduction 598, result has 13.2 percent of original size [2021-10-13 00:56:40,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 317 treesize of output 323 [2021-10-13 00:56:40,528 INFO L354 Elim1Store]: treesize reduction 238, result has 14.4 percent of original size [2021-10-13 00:56:40,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 26 case distinctions, treesize of input 329 treesize of output 173 [2021-10-13 00:56:40,541 INFO L354 Elim1Store]: treesize reduction 180, result has 0.6 percent of original size [2021-10-13 00:56:40,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 192 treesize of output 140 [2021-10-13 00:56:40,708 INFO L354 Elim1Store]: treesize reduction 92, result has 12.4 percent of original size [2021-10-13 00:56:40,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 67 [2021-10-13 00:56:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:56:40,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662570951] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:56:40,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:56:40,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-10-13 00:56:40,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462209483] [2021-10-13 00:56:40,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 00:56:40,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:56:40,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 00:56:40,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-10-13 00:56:40,752 INFO L87 Difference]: Start difference. First operand 159 states and 184 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 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) [2021-10-13 00:56:48,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:56:48,300 INFO L93 Difference]: Finished difference Result 286 states and 332 transitions. [2021-10-13 00:56:48,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 00:56:48,301 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 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) Word has length 28 [2021-10-13 00:56:48,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:56:48,302 INFO L225 Difference]: With dead ends: 286 [2021-10-13 00:56:48,302 INFO L226 Difference]: Without dead ends: 261 [2021-10-13 00:56:48,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 915.6ms TimeCoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 00:56:48,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-10-13 00:56:48,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 178. [2021-10-13 00:56:48,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.1694915254237288) internal successors, (207), 177 states have internal predecessors, (207), 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) [2021-10-13 00:56:48,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 207 transitions. [2021-10-13 00:56:48,322 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 207 transitions. Word has length 28 [2021-10-13 00:56:48,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:56:48,323 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 207 transitions. [2021-10-13 00:56:48,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 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) [2021-10-13 00:56:48,323 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 207 transitions. [2021-10-13 00:56:48,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 00:56:48,324 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:56:48,324 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:56:48,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 00:56:48,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:56:48,527 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:56:48,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:56:48,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1849231824, now seen corresponding path program 2 times [2021-10-13 00:56:48,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:56:48,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122529920] [2021-10-13 00:56:48,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:56:48,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:56:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:56:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:56:48,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:56:48,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122529920] [2021-10-13 00:56:48,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122529920] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:56:48,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289584095] [2021-10-13 00:56:48,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:56:48,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:56:48,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:56:48,737 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:56:48,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 00:56:49,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:56:49,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:56:49,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-13 00:56:49,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:56:49,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:56:49,632 INFO L354 Elim1Store]: treesize reduction 544, result has 9.3 percent of original size [2021-10-13 00:56:49,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 325 treesize of output 226 [2021-10-13 00:56:49,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:56:49,664 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-10-13 00:56:49,665 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 3 case distinctions, treesize of input 85 treesize of output 74 [2021-10-13 00:56:49,677 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-10-13 00:56:49,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 95 [2021-10-13 00:56:51,030 INFO L354 Elim1Store]: treesize reduction 116, result has 19.4 percent of original size [2021-10-13 00:56:51,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 111 [2021-10-13 00:56:51,058 INFO L354 Elim1Store]: treesize reduction 144, result has 20.0 percent of original size [2021-10-13 00:56:51,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 123 treesize of output 115 [2021-10-13 00:56:51,701 INFO L354 Elim1Store]: treesize reduction 1065, result has 10.1 percent of original size [2021-10-13 00:56:51,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 591 treesize of output 422 [2021-10-13 00:56:51,946 INFO L354 Elim1Store]: treesize reduction 1284, result has 9.1 percent of original size [2021-10-13 00:56:51,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 787 treesize of output 590 [2021-10-13 00:56:51,986 INFO L354 Elim1Store]: treesize reduction 20, result has 64.9 percent of original size [2021-10-13 00:56:51,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 735 treesize of output 749 [2021-10-13 00:56:56,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:56:56,831 INFO L354 Elim1Store]: treesize reduction 104, result has 21.8 percent of original size [2021-10-13 00:56:56,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 1465 treesize of output 1113 [2021-10-13 00:56:58,196 INFO L354 Elim1Store]: treesize reduction 92, result has 30.8 percent of original size [2021-10-13 00:56:58,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 1425 treesize of output 925 [2021-10-13 00:57:07,358 INFO L354 Elim1Store]: treesize reduction 446, result has 9.5 percent of original size [2021-10-13 00:57:07,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 42 case distinctions, treesize of input 927 treesize of output 489 [2021-10-13 00:57:07,467 INFO L354 Elim1Store]: treesize reduction 162, result has 32.8 percent of original size [2021-10-13 00:57:07,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 489 treesize of output 411 [2021-10-13 00:57:39,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: No corresponding IProgramVar for v_subst_1 [2021-10-13 00:57:39,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:57:39,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-13 00:57:39,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731234103] [2021-10-13 00:57:39,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 00:57:39,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:57:39,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 00:57:39,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-10-13 00:57:39,156 INFO L87 Difference]: Start difference. First operand 178 states and 207 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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) [2021-10-13 00:57:39,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:57:39,693 INFO L93 Difference]: Finished difference Result 221 states and 256 transitions. [2021-10-13 00:57:39,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 00:57:39,693 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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) Word has length 29 [2021-10-13 00:57:39,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:57:39,695 INFO L225 Difference]: With dead ends: 221 [2021-10-13 00:57:39,695 INFO L226 Difference]: Without dead ends: 207 [2021-10-13 00:57:39,695 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1053.9ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-10-13 00:57:39,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-10-13 00:57:39,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 179. [2021-10-13 00:57:39,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.1685393258426966) internal successors, (208), 178 states have internal predecessors, (208), 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) [2021-10-13 00:57:39,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 208 transitions. [2021-10-13 00:57:39,719 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 208 transitions. Word has length 29 [2021-10-13 00:57:39,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:57:39,719 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 208 transitions. [2021-10-13 00:57:39,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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) [2021-10-13 00:57:39,720 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 208 transitions. [2021-10-13 00:57:39,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 00:57:39,721 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:57:39,721 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:57:39,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-13 00:57:39,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-13 00:57:39,937 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:57:39,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:57:39,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1441361008, now seen corresponding path program 6 times [2021-10-13 00:57:39,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:57:39,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370432089] [2021-10-13 00:57:39,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:57:39,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:57:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:57:40,633 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:57:40,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:57:40,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370432089] [2021-10-13 00:57:40,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370432089] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:57:40,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824174767] [2021-10-13 00:57:40,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:57:40,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:57:40,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:57:40,634 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:57:40,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 00:57:42,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 00:57:42,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:57:42,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 102 conjunts are in the unsatisfiable core [2021-10-13 00:57:42,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:57:42,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:57:42,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:42,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:42,692 INFO L354 Elim1Store]: treesize reduction 158, result has 12.2 percent of original size [2021-10-13 00:57:42,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 191 treesize of output 142 [2021-10-13 00:57:42,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:42,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:57:42,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:42,724 INFO L354 Elim1Store]: treesize reduction 186, result has 12.3 percent of original size [2021-10-13 00:57:42,724 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 3 case distinctions, treesize of input 139 treesize of output 78 [2021-10-13 00:57:42,736 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-10-13 00:57:42,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 82 [2021-10-13 00:57:42,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:57:42,984 INFO L354 Elim1Store]: treesize reduction 360, result has 9.1 percent of original size [2021-10-13 00:57:42,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 351 treesize of output 195 [2021-10-13 00:57:42,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:57:43,091 INFO L354 Elim1Store]: treesize reduction 572, result has 8.9 percent of original size [2021-10-13 00:57:43,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 287 treesize of output 164 [2021-10-13 00:57:43,111 INFO L354 Elim1Store]: treesize reduction 108, result has 20.0 percent of original size [2021-10-13 00:57:43,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 155 treesize of output 162 [2021-10-13 00:57:43,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:57:43,579 INFO L354 Elim1Store]: treesize reduction 706, result has 6.6 percent of original size [2021-10-13 00:57:43,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 611 treesize of output 395 [2021-10-13 00:57:43,585 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 657 treesize of output 649 [2021-10-13 00:57:43,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:57:43,634 INFO L354 Elim1Store]: treesize reduction 352, result has 14.6 percent of original size [2021-10-13 00:57:43,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 16 case distinctions, treesize of input 263 treesize of output 219 [2021-10-13 00:57:43,647 INFO L354 Elim1Store]: treesize reduction 89, result has 8.2 percent of original size [2021-10-13 00:57:43,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 204 treesize of output 188 [2021-10-13 00:57:44,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:57:44,374 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 00:57:44,375 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 227 treesize of output 226 [2021-10-13 00:57:44,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:44,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:44,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:44,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:57:44,388 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-10-13 00:57:44,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 223 treesize of output 163 [2021-10-13 00:57:44,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:44,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:44,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:44,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:57:44,403 INFO L354 Elim1Store]: treesize reduction 132, result has 0.8 percent of original size [2021-10-13 00:57:44,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 188 treesize of output 190 [2021-10-13 00:57:44,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:57:44,599 INFO L354 Elim1Store]: treesize reduction 394, result has 11.3 percent of original size [2021-10-13 00:57:44,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 268 treesize of output 210 [2021-10-13 00:57:44,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:57:44,625 INFO L354 Elim1Store]: treesize reduction 150, result has 16.2 percent of original size [2021-10-13 00:57:44,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 276 [2021-10-13 00:57:44,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:44,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:57:44,694 INFO L354 Elim1Store]: treesize reduction 582, result has 14.4 percent of original size [2021-10-13 00:57:44,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 270 treesize of output 274 [2021-10-13 00:57:45,114 INFO L354 Elim1Store]: treesize reduction 980, result has 9.1 percent of original size [2021-10-13 00:57:45,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 29 case distinctions, treesize of input 303 treesize of output 313 [2021-10-13 00:57:45,273 INFO L354 Elim1Store]: treesize reduction 496, result has 9.8 percent of original size [2021-10-13 00:57:45,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 29 case distinctions, treesize of input 285 treesize of output 204 [2021-10-13 00:57:45,327 INFO L354 Elim1Store]: treesize reduction 534, result has 9.3 percent of original size [2021-10-13 00:57:45,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 231 [2021-10-13 00:57:45,564 INFO L354 Elim1Store]: treesize reduction 312, result has 12.8 percent of original size [2021-10-13 00:57:45,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 26 case distinctions, treesize of input 280 treesize of output 232 [2021-10-13 00:57:45,633 INFO L354 Elim1Store]: treesize reduction 438, result has 9.1 percent of original size [2021-10-13 00:57:45,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 374 treesize of output 296 [2021-10-13 00:57:45,657 INFO L354 Elim1Store]: treesize reduction 173, result has 4.9 percent of original size [2021-10-13 00:57:45,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 232 treesize of output 214 [2021-10-13 00:57:45,924 INFO L354 Elim1Store]: treesize reduction 149, result has 5.1 percent of original size [2021-10-13 00:57:45,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 324 treesize of output 176 [2021-10-13 00:57:45,960 INFO L354 Elim1Store]: treesize reduction 154, result has 1.9 percent of original size [2021-10-13 00:57:45,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 145 treesize of output 103 [2021-10-13 00:57:45,987 INFO L354 Elim1Store]: treesize reduction 109, result has 7.6 percent of original size [2021-10-13 00:57:45,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 63 treesize of output 61 [2021-10-13 00:57:46,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:46,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:46,096 INFO L354 Elim1Store]: treesize reduction 117, result has 7.1 percent of original size [2021-10-13 00:57:46,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 46 [2021-10-13 00:57:46,243 INFO L354 Elim1Store]: treesize reduction 24, result has 35.1 percent of original size [2021-10-13 00:57:46,243 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 37 treesize of output 31 [2021-10-13 00:57:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:57:46,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824174767] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:57:46,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:57:46,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-10-13 00:57:46,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536057210] [2021-10-13 00:57:46,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 00:57:46,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:57:46,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 00:57:46,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-10-13 00:57:46,256 INFO L87 Difference]: Start difference. First operand 179 states and 208 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 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) [2021-10-13 00:57:51,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:57:51,464 INFO L93 Difference]: Finished difference Result 315 states and 365 transitions. [2021-10-13 00:57:51,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 00:57:51,464 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 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) Word has length 29 [2021-10-13 00:57:51,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:57:51,466 INFO L225 Difference]: With dead ends: 315 [2021-10-13 00:57:51,466 INFO L226 Difference]: Without dead ends: 302 [2021-10-13 00:57:51,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 3435.9ms TimeCoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2021-10-13 00:57:51,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-10-13 00:57:51,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 181. [2021-10-13 00:57:51,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.1722222222222223) internal successors, (211), 180 states have internal predecessors, (211), 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) [2021-10-13 00:57:51,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 211 transitions. [2021-10-13 00:57:51,492 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 211 transitions. Word has length 29 [2021-10-13 00:57:51,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:57:51,493 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 211 transitions. [2021-10-13 00:57:51,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 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) [2021-10-13 00:57:51,493 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 211 transitions. [2021-10-13 00:57:51,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 00:57:51,494 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:57:51,494 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:57:51,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-13 00:57:51,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-13 00:57:51,706 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:57:51,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:57:51,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1208531812, now seen corresponding path program 3 times [2021-10-13 00:57:51,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:57:51,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767692543] [2021-10-13 00:57:51,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:57:51,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:57:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:57:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:57:52,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:57:52,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767692543] [2021-10-13 00:57:52,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767692543] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:57:52,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515613186] [2021-10-13 00:57:52,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:57:52,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:57:52,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:57:52,090 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:57:52,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 00:57:53,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 00:57:53,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:57:53,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 81 conjunts are in the unsatisfiable core [2021-10-13 00:57:53,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:57:53,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:57:53,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:57:53,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:53,828 INFO L354 Elim1Store]: treesize reduction 544, result has 9.3 percent of original size [2021-10-13 00:57:53,829 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 3 case distinctions, treesize of input 325 treesize of output 226 [2021-10-13 00:57:53,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:53,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:53,862 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-10-13 00:57:53,862 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 3 case distinctions, treesize of input 85 treesize of output 74 [2021-10-13 00:57:53,875 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-10-13 00:57:53,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 95 [2021-10-13 00:57:55,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:55,305 INFO L354 Elim1Store]: treesize reduction 116, result has 19.4 percent of original size [2021-10-13 00:57:55,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 111 [2021-10-13 00:57:55,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:55,336 INFO L354 Elim1Store]: treesize reduction 144, result has 20.0 percent of original size [2021-10-13 00:57:55,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 123 treesize of output 115 [2021-10-13 00:57:55,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 00:57:55,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:55,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:57,886 INFO L354 Elim1Store]: treesize reduction 1065, result has 10.1 percent of original size [2021-10-13 00:57:57,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 787 treesize of output 570 [2021-10-13 00:57:57,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:57,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:58,464 INFO L354 Elim1Store]: treesize reduction 1004, result has 9.1 percent of original size [2021-10-13 00:57:58,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 1282 treesize of output 796 [2021-10-13 00:57:58,516 INFO L354 Elim1Store]: treesize reduction 75, result has 25.0 percent of original size [2021-10-13 00:57:58,516 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 1190 treesize of output 1134 [2021-10-13 00:57:58,573 INFO L354 Elim1Store]: treesize reduction 107, result has 18.9 percent of original size [2021-10-13 00:57:58,574 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 1131 treesize of output 1095 [2021-10-13 00:57:58,636 INFO L354 Elim1Store]: treesize reduction 28, result has 56.9 percent of original size [2021-10-13 00:57:58,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1092 treesize of output 1102 [2021-10-13 00:57:58,683 INFO L354 Elim1Store]: treesize reduction 168, result has 23.3 percent of original size [2021-10-13 00:57:58,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 1093 treesize of output 1099 [2021-10-13 00:57:58,761 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-13 00:57:58,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 23 [2021-10-13 00:57:58,817 INFO L354 Elim1Store]: treesize reduction 43, result has 43.4 percent of original size [2021-10-13 00:57:58,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 172 [2021-10-13 00:57:58,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:57:58,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 53 [2021-10-13 00:57:58,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:57:58,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 61 [2021-10-13 00:57:59,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:59,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:59,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:59,040 INFO L354 Elim1Store]: treesize reduction 37, result has 17.8 percent of original size [2021-10-13 00:57:59,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 92 [2021-10-13 00:57:59,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:57:59,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:59,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:59,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:57:59,601 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-13 00:57:59,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 277 treesize of output 131 [2021-10-13 00:57:59,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:59,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:59,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:59,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:59,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:59,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:57:59,686 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-13 00:57:59,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 277 treesize of output 131 [2021-10-13 00:57:59,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:59,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:59,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:57:59,834 INFO L354 Elim1Store]: treesize reduction 143, result has 7.7 percent of original size [2021-10-13 00:57:59,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 325 treesize of output 175 [2021-10-13 00:58:01,624 INFO L354 Elim1Store]: treesize reduction 608, result has 8.7 percent of original size [2021-10-13 00:58:01,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 29 case distinctions, treesize of input 682 treesize of output 378 [2021-10-13 00:58:01,670 INFO L354 Elim1Store]: treesize reduction 162, result has 10.5 percent of original size [2021-10-13 00:58:01,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 378 treesize of output 307 [2021-10-13 00:58:01,741 INFO L354 Elim1Store]: treesize reduction 188, result has 14.9 percent of original size [2021-10-13 00:58:01,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 307 treesize of output 292 [2021-10-13 00:58:01,798 INFO L354 Elim1Store]: treesize reduction 212, result has 13.5 percent of original size [2021-10-13 00:58:01,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 292 treesize of output 285 [2021-10-13 00:58:04,734 INFO L354 Elim1Store]: treesize reduction 134, result has 12.4 percent of original size [2021-10-13 00:58:04,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 285 treesize of output 192 [2021-10-13 00:58:04,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:04,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:04,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:04,752 INFO L354 Elim1Store]: treesize reduction 71, result has 11.3 percent of original size [2021-10-13 00:58:04,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 192 treesize of output 177 [2021-10-13 00:58:04,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:04,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:58:04,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:04,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:04,775 INFO L354 Elim1Store]: treesize reduction 98, result has 14.8 percent of original size [2021-10-13 00:58:04,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 177 treesize of output 170 [2021-10-13 00:58:09,010 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-13 00:58:09,010 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 1 case distinctions, treesize of input 16 treesize of output 17 [2021-10-13 00:58:09,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:09,015 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 92 treesize of output 92 [2021-10-13 00:58:09,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:09,079 INFO L354 Elim1Store]: treesize reduction 170, result has 22.7 percent of original size [2021-10-13 00:58:09,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 96 [2021-10-13 00:58:09,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-10-13 00:58:09,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-10-13 00:58:09,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 00:58:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:58:09,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515613186] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:09,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:58:09,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-10-13 00:58:09,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162020776] [2021-10-13 00:58:09,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 00:58:09,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:58:09,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 00:58:09,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-10-13 00:58:09,225 INFO L87 Difference]: Start difference. First operand 181 states and 211 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 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) [2021-10-13 00:58:11,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:58:11,454 INFO L93 Difference]: Finished difference Result 225 states and 261 transitions. [2021-10-13 00:58:11,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 00:58:11,455 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 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) Word has length 30 [2021-10-13 00:58:11,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:58:11,456 INFO L225 Difference]: With dead ends: 225 [2021-10-13 00:58:11,456 INFO L226 Difference]: Without dead ends: 223 [2021-10-13 00:58:11,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 5351.8ms TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 00:58:11,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-10-13 00:58:11,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 186. [2021-10-13 00:58:11,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.1783783783783783) internal successors, (218), 185 states have internal predecessors, (218), 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) [2021-10-13 00:58:11,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 218 transitions. [2021-10-13 00:58:11,490 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 218 transitions. Word has length 30 [2021-10-13 00:58:11,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:58:11,491 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 218 transitions. [2021-10-13 00:58:11,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 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) [2021-10-13 00:58:11,491 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 218 transitions. [2021-10-13 00:58:11,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 00:58:11,492 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:58:11,492 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-13 00:58:11,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:11,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:11,713 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:58:11,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:11,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1216579548, now seen corresponding path program 1 times [2021-10-13 00:58:11,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:11,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474372137] [2021-10-13 00:58:11,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:11,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:58:12,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:58:12,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474372137] [2021-10-13 00:58:12,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474372137] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:12,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029339911] [2021-10-13 00:58:12,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:12,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:12,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:12,220 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:58:12,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-13 00:58:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:13,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-13 00:58:13,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:13,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:58:13,575 INFO L354 Elim1Store]: treesize reduction 544, result has 9.3 percent of original size [2021-10-13 00:58:13,575 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 3 case distinctions, treesize of input 319 treesize of output 220 [2021-10-13 00:58:13,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:13,615 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-10-13 00:58:13,615 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 3 case distinctions, treesize of input 79 treesize of output 68 [2021-10-13 00:58:13,623 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 00:58:13,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 81 [2021-10-13 00:58:14,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:14,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:14,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:14,470 INFO L354 Elim1Store]: treesize reduction 55, result has 11.3 percent of original size [2021-10-13 00:58:14,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 113 treesize of output 90 [2021-10-13 00:58:14,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:14,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:14,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:14,485 INFO L354 Elim1Store]: treesize reduction 71, result has 13.4 percent of original size [2021-10-13 00:58:14,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 94 treesize of output 84 [2021-10-13 00:58:14,616 INFO L354 Elim1Store]: treesize reduction 132, result has 19.5 percent of original size [2021-10-13 00:58:14,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 178 treesize of output 148 [2021-10-13 00:58:14,619 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 149 treesize of output 141 [2021-10-13 00:58:14,645 INFO L354 Elim1Store]: treesize reduction 122, result has 21.8 percent of original size [2021-10-13 00:58:14,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 141 treesize of output 133 [2021-10-13 00:58:14,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:58:14,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 130 treesize of output 89 [2021-10-13 00:58:14,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:58:14,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 67 [2021-10-13 00:58:14,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 52 [2021-10-13 00:58:14,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-10-13 00:58:14,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-10-13 00:58:14,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-10-13 00:58:14,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 00:58:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:58:14,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029339911] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:14,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:58:14,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 23 [2021-10-13 00:58:14,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343854028] [2021-10-13 00:58:14,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 00:58:14,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:58:14,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 00:58:14,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-10-13 00:58:14,999 INFO L87 Difference]: Start difference. First operand 186 states and 218 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 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) [2021-10-13 00:58:16,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:58:16,875 INFO L93 Difference]: Finished difference Result 241 states and 278 transitions. [2021-10-13 00:58:16,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 00:58:16,875 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 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) Word has length 30 [2021-10-13 00:58:16,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:58:16,876 INFO L225 Difference]: With dead ends: 241 [2021-10-13 00:58:16,876 INFO L226 Difference]: Without dead ends: 166 [2021-10-13 00:58:16,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1280.1ms TimeCoverageRelationStatistics Valid=221, Invalid=1339, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 00:58:16,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-10-13 00:58:16,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 159. [2021-10-13 00:58:16,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.1708860759493671) internal successors, (185), 158 states have internal predecessors, (185), 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) [2021-10-13 00:58:16,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 185 transitions. [2021-10-13 00:58:16,904 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 185 transitions. Word has length 30 [2021-10-13 00:58:16,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:58:16,904 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 185 transitions. [2021-10-13 00:58:16,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 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) [2021-10-13 00:58:16,905 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 185 transitions. [2021-10-13 00:58:16,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 00:58:16,905 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:58:16,906 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:58:16,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:17,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:17,122 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:58:17,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:17,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1061707579, now seen corresponding path program 2 times [2021-10-13 00:58:17,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:17,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547089244] [2021-10-13 00:58:17,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:17,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:58:17,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:58:17,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547089244] [2021-10-13 00:58:17,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547089244] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:17,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716784901] [2021-10-13 00:58:17,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:58:17,441 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:17,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:17,442 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:58:17,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 00:58:18,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:58:18,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:58:18,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-13 00:58:18,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:18,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:58:18,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:18,784 INFO L354 Elim1Store]: treesize reduction 158, result has 12.2 percent of original size [2021-10-13 00:58:18,784 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 3 case distinctions, treesize of input 195 treesize of output 146 [2021-10-13 00:58:18,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:18,814 INFO L354 Elim1Store]: treesize reduction 158, result has 12.2 percent of original size [2021-10-13 00:58:18,816 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 3 case distinctions, treesize of input 118 treesize of output 69 [2021-10-13 00:58:18,826 INFO L354 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2021-10-13 00:58:18,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 82 [2021-10-13 00:58:19,091 INFO L354 Elim1Store]: treesize reduction 331, result has 12.0 percent of original size [2021-10-13 00:58:19,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 197 treesize of output 135 [2021-10-13 00:58:19,183 INFO L354 Elim1Store]: treesize reduction 654, result has 9.2 percent of original size [2021-10-13 00:58:19,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 200 treesize of output 164 [2021-10-13 00:58:19,212 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-10-13 00:58:19,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 165 [2021-10-13 00:58:20,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:20,461 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 00:58:20,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 68 [2021-10-13 00:58:20,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:20,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:20,986 INFO L354 Elim1Store]: treesize reduction 95, result has 6.9 percent of original size [2021-10-13 00:58:20,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 117 treesize of output 75 [2021-10-13 00:58:21,183 INFO L354 Elim1Store]: treesize reduction 198, result has 20.8 percent of original size [2021-10-13 00:58:21,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 150 treesize of output 114 [2021-10-13 00:58:21,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 114 [2021-10-13 00:58:21,404 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:58:21,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 26 [2021-10-13 00:58:21,420 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:58:21,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716784901] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:21,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:58:21,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-10-13 00:58:21,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675525226] [2021-10-13 00:58:21,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 00:58:21,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:58:21,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 00:58:21,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-10-13 00:58:21,422 INFO L87 Difference]: Start difference. First operand 159 states and 185 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 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) [2021-10-13 00:58:22,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:58:22,669 INFO L93 Difference]: Finished difference Result 196 states and 226 transitions. [2021-10-13 00:58:22,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 00:58:22,669 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 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) Word has length 30 [2021-10-13 00:58:22,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:58:22,671 INFO L225 Difference]: With dead ends: 196 [2021-10-13 00:58:22,671 INFO L226 Difference]: Without dead ends: 182 [2021-10-13 00:58:22,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 806.0ms TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2021-10-13 00:58:22,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-10-13 00:58:22,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 169. [2021-10-13 00:58:22,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.1666666666666667) internal successors, (196), 168 states have internal predecessors, (196), 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) [2021-10-13 00:58:22,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 196 transitions. [2021-10-13 00:58:22,691 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 196 transitions. Word has length 30 [2021-10-13 00:58:22,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:58:22,691 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 196 transitions. [2021-10-13 00:58:22,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 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) [2021-10-13 00:58:22,692 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 196 transitions. [2021-10-13 00:58:22,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 00:58:22,693 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:58:22,693 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:58:22,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-10-13 00:58:22,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-13 00:58:22,899 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:58:22,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:22,900 INFO L82 PathProgramCache]: Analyzing trace with hash -137694500, now seen corresponding path program 7 times [2021-10-13 00:58:22,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:22,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750040674] [2021-10-13 00:58:22,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:22,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:58:23,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:58:23,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750040674] [2021-10-13 00:58:23,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750040674] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:23,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631902885] [2021-10-13 00:58:23,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:58:23,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:23,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:23,644 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:58:23,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-13 00:58:24,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:24,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 98 conjunts are in the unsatisfiable core [2021-10-13 00:58:24,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:24,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:58:25,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:25,065 INFO L354 Elim1Store]: treesize reduction 158, result has 12.2 percent of original size [2021-10-13 00:58:25,066 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 3 case distinctions, treesize of input 191 treesize of output 142 [2021-10-13 00:58:25,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:25,092 INFO L354 Elim1Store]: treesize reduction 138, result has 13.8 percent of original size [2021-10-13 00:58:25,092 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 3 case distinctions, treesize of input 82 treesize of output 62 [2021-10-13 00:58:25,104 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 00:58:25,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-10-13 00:58:25,370 INFO L354 Elim1Store]: treesize reduction 360, result has 9.1 percent of original size [2021-10-13 00:58:25,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 351 treesize of output 195 [2021-10-13 00:58:25,452 INFO L354 Elim1Store]: treesize reduction 428, result has 9.3 percent of original size [2021-10-13 00:58:25,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 163 treesize of output 129 [2021-10-13 00:58:25,517 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-13 00:58:25,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 127 [2021-10-13 00:58:25,959 INFO L354 Elim1Store]: treesize reduction 1958, result has 3.8 percent of original size [2021-10-13 00:58:25,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 362 treesize of output 277 [2021-10-13 00:58:26,019 INFO L354 Elim1Store]: treesize reduction 448, result has 11.8 percent of original size [2021-10-13 00:58:26,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 16 case distinctions, treesize of input 297 treesize of output 245 [2021-10-13 00:58:26,051 INFO L354 Elim1Store]: treesize reduction 105, result has 13.2 percent of original size [2021-10-13 00:58:26,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 230 treesize of output 214 [2021-10-13 00:58:26,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:26,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:26,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:26,849 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-10-13 00:58:26,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 240 treesize of output 147 [2021-10-13 00:58:26,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:26,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:26,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:26,894 INFO L354 Elim1Store]: treesize reduction 192, result has 0.5 percent of original size [2021-10-13 00:58:26,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 221 treesize of output 223 [2021-10-13 00:58:27,055 INFO L354 Elim1Store]: treesize reduction 378, result has 11.7 percent of original size [2021-10-13 00:58:27,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 280 treesize of output 178 [2021-10-13 00:58:27,150 INFO L354 Elim1Store]: treesize reduction 502, result has 12.8 percent of original size [2021-10-13 00:58:27,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 204 treesize of output 208 [2021-10-13 00:58:27,516 INFO L354 Elim1Store]: treesize reduction 164, result has 22.3 percent of original size [2021-10-13 00:58:27,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 27 case distinctions, treesize of input 248 treesize of output 167 [2021-10-13 00:58:27,594 INFO L354 Elim1Store]: treesize reduction 360, result has 15.7 percent of original size [2021-10-13 00:58:27,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 211 treesize of output 205 [2021-10-13 00:58:27,856 INFO L354 Elim1Store]: treesize reduction 505, result has 9.7 percent of original size [2021-10-13 00:58:27,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 37 case distinctions, treesize of input 260 treesize of output 201 [2021-10-13 00:58:27,964 INFO L354 Elim1Store]: treesize reduction 765, result has 7.0 percent of original size [2021-10-13 00:58:27,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 37 case distinctions, treesize of input 207 treesize of output 179 [2021-10-13 00:58:28,145 INFO L354 Elim1Store]: treesize reduction 262, result has 13.0 percent of original size [2021-10-13 00:58:28,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 181 treesize of output 159 [2021-10-13 00:58:28,203 INFO L354 Elim1Store]: treesize reduction 242, result has 12.0 percent of original size [2021-10-13 00:58:28,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 277 treesize of output 181 [2021-10-13 00:58:28,332 INFO L354 Elim1Store]: treesize reduction 32, result has 34.7 percent of original size [2021-10-13 00:58:28,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 200 treesize of output 85 [2021-10-13 00:58:28,343 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-10-13 00:58:28,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 46 [2021-10-13 00:58:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:58:28,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631902885] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:28,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:58:28,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-10-13 00:58:28,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015793195] [2021-10-13 00:58:28,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 00:58:28,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:58:28,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 00:58:28,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-10-13 00:58:28,401 INFO L87 Difference]: Start difference. First operand 169 states and 196 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 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) [2021-10-13 00:58:35,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:58:35,012 INFO L93 Difference]: Finished difference Result 272 states and 316 transitions. [2021-10-13 00:58:35,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 00:58:35,012 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 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) Word has length 30 [2021-10-13 00:58:35,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:58:35,014 INFO L225 Difference]: With dead ends: 272 [2021-10-13 00:58:35,014 INFO L226 Difference]: Without dead ends: 230 [2021-10-13 00:58:35,015 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1201.6ms TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 00:58:35,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-10-13 00:58:35,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 177. [2021-10-13 00:58:35,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.1761363636363635) internal successors, (207), 176 states have internal predecessors, (207), 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) [2021-10-13 00:58:35,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 207 transitions. [2021-10-13 00:58:35,044 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 207 transitions. Word has length 30 [2021-10-13 00:58:35,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:58:35,044 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 207 transitions. [2021-10-13 00:58:35,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 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) [2021-10-13 00:58:35,045 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 207 transitions. [2021-10-13 00:58:35,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 00:58:35,046 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:58:35,046 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:58:35,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:35,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-13 00:58:35,261 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:58:35,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:35,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1297388609, now seen corresponding path program 8 times [2021-10-13 00:58:35,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:35,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201960836] [2021-10-13 00:58:35,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:35,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:35,877 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:58:35,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:58:35,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201960836] [2021-10-13 00:58:35,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201960836] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:35,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666599079] [2021-10-13 00:58:35,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:58:35,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:35,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:35,879 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:58:35,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-13 00:58:37,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:58:37,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:58:37,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 78 conjunts are in the unsatisfiable core [2021-10-13 00:58:37,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:37,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:58:37,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:37,390 INFO L354 Elim1Store]: treesize reduction 158, result has 12.2 percent of original size [2021-10-13 00:58:37,391 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 3 case distinctions, treesize of input 191 treesize of output 142 [2021-10-13 00:58:37,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:37,419 INFO L354 Elim1Store]: treesize reduction 158, result has 12.2 percent of original size [2021-10-13 00:58:37,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 65 [2021-10-13 00:58:37,431 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-10-13 00:58:37,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 82 [2021-10-13 00:58:37,651 INFO L354 Elim1Store]: treesize reduction 360, result has 9.1 percent of original size [2021-10-13 00:58:37,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 351 treesize of output 195 [2021-10-13 00:58:37,716 INFO L354 Elim1Store]: treesize reduction 428, result has 9.3 percent of original size [2021-10-13 00:58:37,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 163 treesize of output 129 [2021-10-13 00:58:37,735 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-13 00:58:37,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 127 [2021-10-13 00:58:38,079 INFO L354 Elim1Store]: treesize reduction 578, result has 8.0 percent of original size [2021-10-13 00:58:38,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 517 treesize of output 238 [2021-10-13 00:58:38,209 INFO L354 Elim1Store]: treesize reduction 938, result has 7.7 percent of original size [2021-10-13 00:58:38,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 18 case distinctions, treesize of input 345 treesize of output 228 [2021-10-13 00:58:38,241 INFO L354 Elim1Store]: treesize reduction 190, result has 15.9 percent of original size [2021-10-13 00:58:38,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 213 treesize of output 223 [2021-10-13 00:58:38,729 INFO L354 Elim1Store]: treesize reduction 783, result has 8.5 percent of original size [2021-10-13 00:58:38,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 31 case distinctions, treesize of input 332 treesize of output 221 [2021-10-13 00:58:38,933 INFO L354 Elim1Store]: treesize reduction 2534, result has 5.6 percent of original size [2021-10-13 00:58:38,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 31 case distinctions, treesize of input 468 treesize of output 404 [2021-10-13 00:58:38,962 INFO L354 Elim1Store]: treesize reduction 136, result has 43.6 percent of original size [2021-10-13 00:58:38,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 383 treesize of output 437 [2021-10-13 00:58:40,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:40,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:40,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:40,289 INFO L354 Elim1Store]: treesize reduction 223, result has 3.0 percent of original size [2021-10-13 00:58:40,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 37 case distinctions, treesize of input 432 treesize of output 208 [2021-10-13 00:58:40,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:40,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:40,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:40,337 INFO L354 Elim1Store]: treesize reduction 623, result has 3.6 percent of original size [2021-10-13 00:58:40,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 37 case distinctions, treesize of input 413 treesize of output 421 [2021-10-13 00:58:40,635 INFO L354 Elim1Store]: treesize reduction 586, result has 9.8 percent of original size [2021-10-13 00:58:40,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 45 case distinctions, treesize of input 472 treesize of output 239 [2021-10-13 00:58:40,747 INFO L354 Elim1Store]: treesize reduction 826, result has 10.4 percent of original size [2021-10-13 00:58:40,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 292 treesize of output 302 [2021-10-13 00:58:41,552 INFO L354 Elim1Store]: treesize reduction 346, result has 15.8 percent of original size [2021-10-13 00:58:41,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 44 case distinctions, treesize of input 440 treesize of output 232 [2021-10-13 00:58:41,680 INFO L354 Elim1Store]: treesize reduction 854, result has 10.9 percent of original size [2021-10-13 00:58:41,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 371 treesize of output 371 [2021-10-13 00:58:42,117 INFO L354 Elim1Store]: treesize reduction 761, result has 8.2 percent of original size [2021-10-13 00:58:42,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 16 new quantified variables, introduced 56 case distinctions, treesize of input 392 treesize of output 238 [2021-10-13 00:58:42,188 INFO L354 Elim1Store]: treesize reduction 498, result has 0.6 percent of original size [2021-10-13 00:58:42,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 295 treesize of output 217 [2021-10-13 00:58:42,397 INFO L354 Elim1Store]: treesize reduction 148, result has 12.4 percent of original size [2021-10-13 00:58:42,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 297 treesize of output 89 [2021-10-13 00:58:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:58:42,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666599079] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:42,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:58:42,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-10-13 00:58:42,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817932023] [2021-10-13 00:58:42,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 00:58:42,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:58:42,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 00:58:42,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-10-13 00:58:42,424 INFO L87 Difference]: Start difference. First operand 177 states and 207 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 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) [2021-10-13 00:58:45,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:58:45,574 INFO L93 Difference]: Finished difference Result 325 states and 378 transitions. [2021-10-13 00:58:45,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 00:58:45,575 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 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) Word has length 30 [2021-10-13 00:58:45,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:58:45,577 INFO L225 Difference]: With dead ends: 325 [2021-10-13 00:58:45,577 INFO L226 Difference]: Without dead ends: 311 [2021-10-13 00:58:45,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1433.3ms TimeCoverageRelationStatistics Valid=193, Invalid=1367, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 00:58:45,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-10-13 00:58:45,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 178. [2021-10-13 00:58:45,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.1751412429378532) internal successors, (208), 177 states have internal predecessors, (208), 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) [2021-10-13 00:58:45,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 208 transitions. [2021-10-13 00:58:45,605 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 208 transitions. Word has length 30 [2021-10-13 00:58:45,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:58:45,606 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 208 transitions. [2021-10-13 00:58:45,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 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) [2021-10-13 00:58:45,606 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 208 transitions. [2021-10-13 00:58:45,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 00:58:45,607 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:58:45,607 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:58:45,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:45,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:45,817 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:58:45,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:45,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1509924016, now seen corresponding path program 4 times [2021-10-13 00:58:45,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:45,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842203162] [2021-10-13 00:58:45,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:45,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:58:46,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:58:46,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842203162] [2021-10-13 00:58:46,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842203162] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:46,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856968947] [2021-10-13 00:58:46,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:58:46,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:46,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:46,053 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:58:46,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-13 00:58:48,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:58:48,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:58:48,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 79 conjunts are in the unsatisfiable core [2021-10-13 00:58:48,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:48,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:58:48,184 INFO L354 Elim1Store]: treesize reduction 544, result has 9.3 percent of original size [2021-10-13 00:58:48,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 325 treesize of output 226 [2021-10-13 00:58:48,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:48,220 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-10-13 00:58:48,221 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 3 case distinctions, treesize of input 85 treesize of output 74 [2021-10-13 00:58:48,233 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-10-13 00:58:48,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 95 [2021-10-13 00:58:49,850 INFO L354 Elim1Store]: treesize reduction 116, result has 19.4 percent of original size [2021-10-13 00:58:49,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 111 [2021-10-13 00:58:49,882 INFO L354 Elim1Store]: treesize reduction 100, result has 21.9 percent of original size [2021-10-13 00:58:49,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 91 [2021-10-13 00:58:50,556 INFO L354 Elim1Store]: treesize reduction 1635, result has 5.2 percent of original size [2021-10-13 00:58:50,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 1364 treesize of output 853 [2021-10-13 00:58:50,914 INFO L354 Elim1Store]: treesize reduction 1410, result has 8.3 percent of original size [2021-10-13 00:58:50,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 11 new quantified variables, introduced 22 case distinctions, treesize of input 1748 treesize of output 902 [2021-10-13 00:58:50,985 INFO L354 Elim1Store]: treesize reduction 28, result has 56.9 percent of original size [2021-10-13 00:58:50,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1514 treesize of output 1524 [2021-10-13 00:58:51,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:51,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:51,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:51,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:51,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:51,627 INFO L354 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-10-13 00:58:51,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 158 treesize of output 80 [2021-10-13 00:58:51,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:51,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:51,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:51,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:51,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:51,668 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-10-13 00:58:51,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 223 treesize of output 109 [2021-10-13 00:58:51,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:58:51,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:51,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:51,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:51,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:51,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:51,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 148 [2021-10-13 00:58:51,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:51,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:51,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:51,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:51,853 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-10-13 00:58:51,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 207 treesize of output 159 [2021-10-13 00:58:52,736 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-10-13 00:58:52,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 366 treesize of output 209 [2021-10-13 00:58:53,332 INFO L354 Elim1Store]: treesize reduction 170, result has 14.6 percent of original size [2021-10-13 00:58:53,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 19 case distinctions, treesize of input 274 treesize of output 202 [2021-10-13 00:58:53,376 INFO L354 Elim1Store]: treesize reduction 214, result has 14.7 percent of original size [2021-10-13 00:58:53,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 251 treesize of output 157 [2021-10-13 00:58:53,890 INFO L354 Elim1Store]: treesize reduction 503, result has 7.4 percent of original size [2021-10-13 00:58:53,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 270 treesize of output 193 [2021-10-13 00:58:53,953 INFO L354 Elim1Store]: treesize reduction 433, result has 9.2 percent of original size [2021-10-13 00:58:53,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 209 treesize of output 159 [2021-10-13 00:58:54,051 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-10-13 00:58:54,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 141 treesize of output 63 [2021-10-13 00:58:54,055 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-13 00:58:54,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 31 [2021-10-13 00:58:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:58:54,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856968947] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:54,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:58:54,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-10-13 00:58:54,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993874726] [2021-10-13 00:58:54,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 00:58:54,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:58:54,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 00:58:54,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-10-13 00:58:54,101 INFO L87 Difference]: Start difference. First operand 178 states and 208 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 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) [2021-10-13 00:59:12,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:59:12,829 INFO L93 Difference]: Finished difference Result 233 states and 271 transitions. [2021-10-13 00:59:12,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 00:59:12,829 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 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) Word has length 31 [2021-10-13 00:59:12,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:59:12,831 INFO L225 Difference]: With dead ends: 233 [2021-10-13 00:59:12,831 INFO L226 Difference]: Without dead ends: 218 [2021-10-13 00:59:12,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 978.1ms TimeCoverageRelationStatistics Valid=180, Invalid=1075, Unknown=5, NotChecked=0, Total=1260 [2021-10-13 00:59:12,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-10-13 00:59:12,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 182. [2021-10-13 00:59:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.171270718232044) internal successors, (212), 181 states have internal predecessors, (212), 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) [2021-10-13 00:59:12,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 212 transitions. [2021-10-13 00:59:12,876 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 212 transitions. Word has length 31 [2021-10-13 00:59:12,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:59:12,876 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 212 transitions. [2021-10-13 00:59:12,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 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) [2021-10-13 00:59:12,877 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 212 transitions. [2021-10-13 00:59:12,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 00:59:12,877 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:59:12,878 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-13 00:59:12,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-13 00:59:13,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:59:13,105 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:59:13,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:59:13,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1253340089, now seen corresponding path program 3 times [2021-10-13 00:59:13,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:59:13,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564731360] [2021-10-13 00:59:13,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:59:13,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:59:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:59:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:59:13,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:59:13,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564731360] [2021-10-13 00:59:13,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564731360] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:59:13,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672013067] [2021-10-13 00:59:13,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:59:13,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:59:13,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:59:13,514 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:59:13,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-13 00:59:15,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 00:59:15,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:59:15,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 86 conjunts are in the unsatisfiable core [2021-10-13 00:59:15,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:59:15,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:59:15,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:16,034 INFO L354 Elim1Store]: treesize reduction 158, result has 12.2 percent of original size [2021-10-13 00:59:16,034 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 3 case distinctions, treesize of input 191 treesize of output 142 [2021-10-13 00:59:16,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:16,060 INFO L354 Elim1Store]: treesize reduction 138, result has 13.8 percent of original size [2021-10-13 00:59:16,061 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 3 case distinctions, treesize of input 82 treesize of output 62 [2021-10-13 00:59:16,072 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 00:59:16,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-10-13 00:59:16,281 INFO L354 Elim1Store]: treesize reduction 448, result has 7.4 percent of original size [2021-10-13 00:59:16,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 489 treesize of output 319 [2021-10-13 00:59:16,308 INFO L354 Elim1Store]: treesize reduction 166, result has 15.3 percent of original size [2021-10-13 00:59:16,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 199 treesize of output 161 [2021-10-13 00:59:16,317 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-10-13 00:59:16,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 146 [2021-10-13 00:59:17,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 00:59:17,299 INFO L354 Elim1Store]: treesize reduction 202, result has 15.1 percent of original size [2021-10-13 00:59:17,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 181 treesize of output 123 [2021-10-13 00:59:17,346 INFO L354 Elim1Store]: treesize reduction 222, result has 16.5 percent of original size [2021-10-13 00:59:17,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 122 treesize of output 114 [2021-10-13 00:59:17,541 INFO L354 Elim1Store]: treesize reduction 186, result has 16.2 percent of original size [2021-10-13 00:59:17,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 295 treesize of output 171 [2021-10-13 00:59:17,559 INFO L354 Elim1Store]: treesize reduction 73, result has 13.1 percent of original size [2021-10-13 00:59:17,560 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 236 treesize of output 227 [2021-10-13 00:59:17,617 INFO L354 Elim1Store]: treesize reduction 330, result has 15.4 percent of original size [2021-10-13 00:59:17,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 224 treesize of output 206 [2021-10-13 00:59:17,887 INFO L354 Elim1Store]: treesize reduction 92, result has 26.4 percent of original size [2021-10-13 00:59:17,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 227 treesize of output 165 [2021-10-13 00:59:17,900 INFO L354 Elim1Store]: treesize reduction 117, result has 17.6 percent of original size [2021-10-13 00:59:17,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 217 treesize of output 208 [2021-10-13 00:59:17,912 INFO L354 Elim1Store]: treesize reduction 117, result has 17.6 percent of original size [2021-10-13 00:59:17,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 202 treesize of output 193 [2021-10-13 00:59:17,918 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-10-13 00:59:17,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 187 treesize of output 131 [2021-10-13 00:59:18,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:18,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:18,011 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-10-13 00:59:18,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 131 [2021-10-13 00:59:18,025 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-10-13 00:59:18,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 118 treesize of output 51 [2021-10-13 00:59:18,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:59:18,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672013067] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:59:18,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:59:18,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-10-13 00:59:18,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679853283] [2021-10-13 00:59:18,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 00:59:18,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:59:18,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 00:59:18,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-10-13 00:59:18,074 INFO L87 Difference]: Start difference. First operand 182 states and 212 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 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) [2021-10-13 00:59:21,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:59:21,879 INFO L93 Difference]: Finished difference Result 218 states and 252 transitions. [2021-10-13 00:59:21,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 00:59:21,880 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 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) Word has length 31 [2021-10-13 00:59:21,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:59:21,881 INFO L225 Difference]: With dead ends: 218 [2021-10-13 00:59:21,881 INFO L226 Difference]: Without dead ends: 204 [2021-10-13 00:59:21,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1052.7ms TimeCoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 00:59:21,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-10-13 00:59:21,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 182. [2021-10-13 00:59:21,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.1657458563535912) internal successors, (211), 181 states have internal predecessors, (211), 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) [2021-10-13 00:59:21,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 211 transitions. [2021-10-13 00:59:21,916 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 211 transitions. Word has length 31 [2021-10-13 00:59:21,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:59:21,917 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 211 transitions. [2021-10-13 00:59:21,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 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) [2021-10-13 00:59:21,917 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 211 transitions. [2021-10-13 00:59:21,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 00:59:21,918 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:59:21,918 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:59:21,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-13 00:59:22,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-13 00:59:22,131 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:59:22,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:59:22,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1135802293, now seen corresponding path program 9 times [2021-10-13 00:59:22,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:59:22,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850862194] [2021-10-13 00:59:22,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:59:22,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:59:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:59:22,807 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:59:22,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:59:22,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850862194] [2021-10-13 00:59:22,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850862194] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:59:22,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648691479] [2021-10-13 00:59:22,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:59:22,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:59:22,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:59:22,810 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:59:22,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-13 00:59:35,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-13 00:59:35,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:59:35,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 117 conjunts are in the unsatisfiable core [2021-10-13 00:59:35,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:59:35,525 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 6 treesize of output 5 [2021-10-13 00:59:35,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:35,608 INFO L354 Elim1Store]: treesize reduction 158, result has 12.2 percent of original size [2021-10-13 00:59:35,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 191 treesize of output 142 [2021-10-13 00:59:35,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:35,639 INFO L354 Elim1Store]: treesize reduction 158, result has 12.2 percent of original size [2021-10-13 00:59:35,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 65 [2021-10-13 00:59:35,649 INFO L354 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2021-10-13 00:59:35,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 74 [2021-10-13 00:59:35,868 INFO L354 Elim1Store]: treesize reduction 360, result has 9.1 percent of original size [2021-10-13 00:59:35,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 343 treesize of output 191 [2021-10-13 00:59:35,938 INFO L354 Elim1Store]: treesize reduction 520, result has 9.1 percent of original size [2021-10-13 00:59:35,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 256 treesize of output 153 [2021-10-13 00:59:35,959 INFO L354 Elim1Store]: treesize reduction 108, result has 20.0 percent of original size [2021-10-13 00:59:35,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 144 treesize of output 151 [2021-10-13 00:59:36,324 INFO L354 Elim1Store]: treesize reduction 578, result has 8.0 percent of original size [2021-10-13 00:59:36,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 513 treesize of output 234 [2021-10-13 00:59:36,440 INFO L354 Elim1Store]: treesize reduction 874, result has 7.8 percent of original size [2021-10-13 00:59:36,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 18 case distinctions, treesize of input 253 treesize of output 209 [2021-10-13 00:59:36,471 INFO L354 Elim1Store]: treesize reduction 158, result has 16.8 percent of original size [2021-10-13 00:59:36,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 194 treesize of output 204 [2021-10-13 00:59:37,127 INFO L354 Elim1Store]: treesize reduction 980, result has 6.1 percent of original size [2021-10-13 00:59:37,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 31 case distinctions, treesize of input 961 treesize of output 397 [2021-10-13 00:59:37,260 INFO L354 Elim1Store]: treesize reduction 894, result has 9.9 percent of original size [2021-10-13 00:59:37,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 29 case distinctions, treesize of input 447 treesize of output 381 [2021-10-13 00:59:37,280 INFO L354 Elim1Store]: treesize reduction 221, result has 8.3 percent of original size [2021-10-13 00:59:37,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 360 treesize of output 330 [2021-10-13 00:59:38,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:38,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:38,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:38,208 INFO L354 Elim1Store]: treesize reduction 128, result has 0.8 percent of original size [2021-10-13 00:59:38,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 4 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 36 case distinctions, treesize of input 353 treesize of output 185 [2021-10-13 00:59:38,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:38,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:38,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:38,229 INFO L354 Elim1Store]: treesize reduction 212, result has 0.5 percent of original size [2021-10-13 00:59:38,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 4 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 201 treesize of output 209 [2021-10-13 00:59:38,449 INFO L354 Elim1Store]: treesize reduction 526, result has 10.8 percent of original size [2021-10-13 00:59:38,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 2 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 45 case distinctions, treesize of input 393 treesize of output 216 [2021-10-13 00:59:38,575 INFO L354 Elim1Store]: treesize reduction 978, result has 12.8 percent of original size [2021-10-13 00:59:38,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 2 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 354 treesize of output 368 [2021-10-13 00:59:38,927 INFO L354 Elim1Store]: treesize reduction 776, result has 15.0 percent of original size [2021-10-13 00:59:38,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 365 treesize of output 377 [2021-10-13 00:59:39,020 INFO L354 Elim1Store]: treesize reduction 248, result has 20.8 percent of original size [2021-10-13 00:59:39,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 44 case distinctions, treesize of input 343 treesize of output 191 [2021-10-13 00:59:39,323 INFO L354 Elim1Store]: treesize reduction 280, result has 18.8 percent of original size [2021-10-13 00:59:39,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 53 case distinctions, treesize of input 308 treesize of output 220 [2021-10-13 00:59:39,404 INFO L354 Elim1Store]: treesize reduction 480, result has 13.4 percent of original size [2021-10-13 00:59:39,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 43 case distinctions, treesize of input 267 treesize of output 256 [2021-10-13 00:59:39,700 INFO L354 Elim1Store]: treesize reduction 232, result has 20.0 percent of original size [2021-10-13 00:59:39,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 43 case distinctions, treesize of input 384 treesize of output 189 [2021-10-13 00:59:39,716 INFO L354 Elim1Store]: treesize reduction 192, result has 0.5 percent of original size [2021-10-13 00:59:39,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 243 treesize of output 171 [2021-10-13 00:59:39,905 INFO L354 Elim1Store]: treesize reduction 76, result has 27.6 percent of original size [2021-10-13 00:59:39,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 250 treesize of output 90 [2021-10-13 00:59:39,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 00:59:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:59:39,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648691479] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:59:39,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:59:39,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-10-13 00:59:39,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561786199] [2021-10-13 00:59:39,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 00:59:39,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:59:39,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 00:59:39,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-10-13 00:59:39,953 INFO L87 Difference]: Start difference. First operand 182 states and 211 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 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) [2021-10-13 00:59:41,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:59:41,955 INFO L93 Difference]: Finished difference Result 322 states and 373 transitions. [2021-10-13 00:59:41,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 00:59:41,958 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 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) Word has length 31 [2021-10-13 00:59:41,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:59:41,959 INFO L225 Difference]: With dead ends: 322 [2021-10-13 00:59:41,959 INFO L226 Difference]: Without dead ends: 308 [2021-10-13 00:59:41,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1541.8ms TimeCoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 00:59:41,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-10-13 00:59:41,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 199. [2021-10-13 00:59:41,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.1717171717171717) internal successors, (232), 198 states have internal predecessors, (232), 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) [2021-10-13 00:59:41,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 232 transitions. [2021-10-13 00:59:41,994 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 232 transitions. Word has length 31 [2021-10-13 00:59:41,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:59:41,994 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 232 transitions. [2021-10-13 00:59:41,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 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) [2021-10-13 00:59:41,995 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 232 transitions. [2021-10-13 00:59:41,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 00:59:41,995 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:59:41,996 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:59:42,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-13 00:59:42,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:59:42,206 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:59:42,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:59:42,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1395986693, now seen corresponding path program 4 times [2021-10-13 00:59:42,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:59:42,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549558259] [2021-10-13 00:59:42,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:59:42,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:59:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:59:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:59:42,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:59:42,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549558259] [2021-10-13 00:59:42,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549558259] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:59:42,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190495415] [2021-10-13 00:59:42,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:59:42,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:59:42,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:59:42,690 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:59:42,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-13 00:59:44,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:59:44,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:59:44,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 90 conjunts are in the unsatisfiable core [2021-10-13 00:59:44,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:59:44,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:59:45,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:45,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:59:45,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:45,049 INFO L354 Elim1Store]: treesize reduction 158, result has 12.2 percent of original size [2021-10-13 00:59:45,050 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 3 case distinctions, treesize of input 191 treesize of output 142 [2021-10-13 00:59:45,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:45,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:45,087 INFO L354 Elim1Store]: treesize reduction 158, result has 12.2 percent of original size [2021-10-13 00:59:45,087 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 3 case distinctions, treesize of input 114 treesize of output 65 [2021-10-13 00:59:45,100 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 00:59:45,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-10-13 00:59:45,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:59:45,307 INFO L354 Elim1Store]: treesize reduction 331, result has 12.0 percent of original size [2021-10-13 00:59:45,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 197 treesize of output 135 [2021-10-13 00:59:45,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:59:45,383 INFO L354 Elim1Store]: treesize reduction 654, result has 9.2 percent of original size [2021-10-13 00:59:45,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 200 treesize of output 164 [2021-10-13 00:59:45,396 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-10-13 00:59:45,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 165 [2021-10-13 00:59:47,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:59:47,500 INFO L354 Elim1Store]: treesize reduction 230, result has 13.5 percent of original size [2021-10-13 00:59:47,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 200 treesize of output 138 [2021-10-13 00:59:47,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:47,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:59:47,564 INFO L354 Elim1Store]: treesize reduction 350, result has 14.6 percent of original size [2021-10-13 00:59:47,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 181 treesize of output 173 [2021-10-13 00:59:47,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 00:59:47,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:59:47,830 INFO L354 Elim1Store]: treesize reduction 210, result has 16.0 percent of original size [2021-10-13 00:59:47,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 314 treesize of output 190 [2021-10-13 00:59:47,843 INFO L354 Elim1Store]: treesize reduction 73, result has 13.1 percent of original size [2021-10-13 00:59:47,844 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 269 treesize of output 260 [2021-10-13 00:59:47,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:47,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:59:47,902 INFO L354 Elim1Store]: treesize reduction 366, result has 14.9 percent of original size [2021-10-13 00:59:47,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 257 treesize of output 235 [2021-10-13 00:59:48,325 INFO L354 Elim1Store]: treesize reduction 312, result has 11.4 percent of original size [2021-10-13 00:59:48,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 232 treesize of output 174 [2021-10-13 00:59:48,367 INFO L354 Elim1Store]: treesize reduction 326, result has 9.4 percent of original size [2021-10-13 00:59:48,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 212 treesize of output 187 [2021-10-13 00:59:48,376 INFO L354 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2021-10-13 00:59:48,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 166 treesize of output 113 [2021-10-13 00:59:48,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:48,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:48,509 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:59:48,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 112 [2021-10-13 00:59:48,525 INFO L354 Elim1Store]: treesize reduction 79, result has 3.7 percent of original size [2021-10-13 00:59:48,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 99 treesize of output 54 [2021-10-13 00:59:48,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-10-13 00:59:48,583 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-13 00:59:48,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 65 [2021-10-13 00:59:48,604 INFO L354 Elim1Store]: treesize reduction 60, result has 34.1 percent of original size [2021-10-13 00:59:48,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 56 [2021-10-13 00:59:48,621 INFO L354 Elim1Store]: treesize reduction 80, result has 22.3 percent of original size [2021-10-13 00:59:48,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 41 [2021-10-13 00:59:48,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:48,633 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 17 [2021-10-13 00:59:48,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2021-10-13 00:59:48,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2021-10-13 00:59:48,772 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 00:59:48,772 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 21 [2021-10-13 00:59:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:59:48,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190495415] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:59:48,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:59:48,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-10-13 00:59:48,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308250090] [2021-10-13 00:59:48,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 00:59:48,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:59:48,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 00:59:48,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-10-13 00:59:48,779 INFO L87 Difference]: Start difference. First operand 199 states and 232 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 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) [2021-10-13 00:59:50,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:59:50,485 INFO L93 Difference]: Finished difference Result 246 states and 284 transitions. [2021-10-13 00:59:50,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 00:59:50,485 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 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) Word has length 32 [2021-10-13 00:59:50,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:59:50,487 INFO L225 Difference]: With dead ends: 246 [2021-10-13 00:59:50,487 INFO L226 Difference]: Without dead ends: 244 [2021-10-13 00:59:50,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1089.9ms TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-10-13 00:59:50,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-10-13 00:59:50,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 194. [2021-10-13 00:59:50,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.1761658031088082) internal successors, (227), 193 states have internal predecessors, (227), 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) [2021-10-13 00:59:50,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 227 transitions. [2021-10-13 00:59:50,534 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 227 transitions. Word has length 32 [2021-10-13 00:59:50,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:59:50,535 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 227 transitions. [2021-10-13 00:59:50,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 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) [2021-10-13 00:59:50,535 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 227 transitions. [2021-10-13 00:59:50,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 00:59:50,536 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:59:50,536 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:59:50,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-13 00:59:50,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-13 00:59:50,761 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:59:50,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:59:50,762 INFO L82 PathProgramCache]: Analyzing trace with hash -179322006, now seen corresponding path program 5 times [2021-10-13 00:59:50,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:59:50,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416835640] [2021-10-13 00:59:50,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:59:50,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:59:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:59:51,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:59:51,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:59:51,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416835640] [2021-10-13 00:59:51,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416835640] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:59:51,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041780468] [2021-10-13 00:59:51,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:59:51,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:59:51,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:59:51,106 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:59:51,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-13 00:59:53,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 00:59:53,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:59:53,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 76 conjunts are in the unsatisfiable core [2021-10-13 00:59:53,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:59:53,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:59:53,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 00:59:53,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:54,065 INFO L354 Elim1Store]: treesize reduction 149, result has 17.2 percent of original size [2021-10-13 00:59:54,065 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 3 case distinctions, treesize of input 161 treesize of output 121 [2021-10-13 00:59:54,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:54,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:54,135 INFO L354 Elim1Store]: treesize reduction 185, result has 17.8 percent of original size [2021-10-13 00:59:54,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 102 [2021-10-13 00:59:54,151 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 00:59:54,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 89 [2021-10-13 00:59:54,552 INFO L354 Elim1Store]: treesize reduction 432, result has 11.7 percent of original size [2021-10-13 00:59:54,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 311 treesize of output 204 [2021-10-13 00:59:54,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:54,630 INFO L354 Elim1Store]: treesize reduction 238, result has 12.5 percent of original size [2021-10-13 00:59:54,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 309 treesize of output 255 [2021-10-13 00:59:54,727 INFO L354 Elim1Store]: treesize reduction 92, result has 31.9 percent of original size [2021-10-13 00:59:54,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 238 treesize of output 261 [2021-10-13 00:59:54,776 INFO L354 Elim1Store]: treesize reduction 216, result has 12.2 percent of original size [2021-10-13 00:59:54,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 240 treesize of output 246 [2021-10-13 00:59:57,414 INFO L354 Elim1Store]: treesize reduction 1414, result has 8.5 percent of original size [2021-10-13 00:59:57,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 26 case distinctions, treesize of input 686 treesize of output 403 [2021-10-13 00:59:57,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-10-13 00:59:57,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:59:57,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-13 00:59:57,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289172149] [2021-10-13 00:59:57,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 00:59:57,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:59:57,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 00:59:57,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-10-13 00:59:57,432 INFO L87 Difference]: Start difference. First operand 194 states and 227 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 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) [2021-10-13 00:59:57,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 00:59:57,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-13 00:59:57,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:59:57,639 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@4c6e39bf at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:864) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 00:59:57,641 INFO L168 Benchmark]: Toolchain (without parser) took 431432.41 ms. Allocated memory was 107.0 MB in the beginning and 597.7 MB in the end (delta: 490.7 MB). Free memory was 75.3 MB in the beginning and 298.3 MB in the end (delta: -223.0 MB). Peak memory consumption was 266.6 MB. Max. memory is 16.1 GB. [2021-10-13 00:59:57,641 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 107.0 MB. Free memory is still 61.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:59:57,641 INFO L168 Benchmark]: CACSL2BoogieTranslator took 527.84 ms. Allocated memory is still 107.0 MB. Free memory was 75.0 MB in the beginning and 74.3 MB in the end (delta: 731.2 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:59:57,642 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.45 ms. Allocated memory is still 107.0 MB. Free memory was 74.3 MB in the beginning and 72.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:59:57,642 INFO L168 Benchmark]: Boogie Preprocessor took 33.41 ms. Allocated memory is still 107.0 MB. Free memory was 72.3 MB in the beginning and 70.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:59:57,642 INFO L168 Benchmark]: RCFGBuilder took 753.82 ms. Allocated memory is still 107.0 MB. Free memory was 70.2 MB in the beginning and 53.4 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-13 00:59:57,643 INFO L168 Benchmark]: TraceAbstraction took 430059.74 ms. Allocated memory was 107.0 MB in the beginning and 597.7 MB in the end (delta: 490.7 MB). Free memory was 53.0 MB in the beginning and 298.3 MB in the end (delta: -245.3 MB). Peak memory consumption was 246.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:59:57,644 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 107.0 MB. Free memory is still 61.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 527.84 ms. Allocated memory is still 107.0 MB. Free memory was 75.0 MB in the beginning and 74.3 MB in the end (delta: 731.2 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.45 ms. Allocated memory is still 107.0 MB. Free memory was 74.3 MB in the beginning and 72.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.41 ms. Allocated memory is still 107.0 MB. Free memory was 72.3 MB in the beginning and 70.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 753.82 ms. Allocated memory is still 107.0 MB. Free memory was 70.2 MB in the beginning and 53.4 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 430059.74 ms. Allocated memory was 107.0 MB in the beginning and 597.7 MB in the end (delta: 490.7 MB). Free memory was 53.0 MB in the beginning and 298.3 MB in the end (delta: -245.3 MB). Peak memory consumption was 246.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@4c6e39bf de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@4c6e39bf: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 00:59:57,873 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-13 00:59:57,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 01:00:00,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 01:00:00,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 01:00:00,731 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 01:00:00,732 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 01:00:00,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 01:00:00,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 01:00:00,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 01:00:00,754 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 01:00:00,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 01:00:00,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 01:00:00,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 01:00:00,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 01:00:00,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 01:00:00,775 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 01:00:00,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 01:00:00,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 01:00:00,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 01:00:00,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 01:00:00,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 01:00:00,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 01:00:00,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 01:00:00,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 01:00:00,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 01:00:00,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 01:00:00,816 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 01:00:00,816 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 01:00:00,819 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 01:00:00,819 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 01:00:00,821 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 01:00:00,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 01:00:00,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 01:00:00,824 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 01:00:00,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 01:00:00,827 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 01:00:00,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 01:00:00,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 01:00:00,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 01:00:00,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 01:00:00,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 01:00:00,832 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 01:00:00,837 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-13 01:00:00,883 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 01:00:00,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 01:00:00,884 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 01:00:00,884 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 01:00:00,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 01:00:00,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 01:00:00,887 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 01:00:00,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 01:00:00,887 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 01:00:00,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 01:00:00,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 01:00:00,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 01:00:00,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 01:00:00,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 01:00:00,889 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 01:00:00,890 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 01:00:00,890 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 01:00:00,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 01:00:00,890 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 01:00:00,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 01:00:00,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 01:00:00,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 01:00:00,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 01:00:00,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:00:00,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 01:00:00,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 01:00:00,892 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 01:00:00,892 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 01:00:00,893 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 01:00:00,893 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 01:00:00,893 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 01:00:00,893 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 01:00:00,894 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8f03aacd6a0ba176a4c5bf885e9983ba429f85c [2021-10-13 01:00:01,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 01:00:01,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 01:00:01,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 01:00:01,286 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 01:00:01,287 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 01:00:01,289 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/forester-heap/dll-reverse.i [2021-10-13 01:00:01,361 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/data/090060590/a228461eede94e3fa4c3e08b610e9f7d/FLAGfb345f770 [2021-10-13 01:00:02,095 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 01:00:02,101 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/sv-benchmarks/c/forester-heap/dll-reverse.i [2021-10-13 01:00:02,126 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/data/090060590/a228461eede94e3fa4c3e08b610e9f7d/FLAGfb345f770 [2021-10-13 01:00:02,321 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/data/090060590/a228461eede94e3fa4c3e08b610e9f7d [2021-10-13 01:00:02,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 01:00:02,330 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 01:00:02,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 01:00:02,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 01:00:02,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 01:00:02,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:00:02" (1/1) ... [2021-10-13 01:00:02,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@586bbc01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:00:02, skipping insertion in model container [2021-10-13 01:00:02,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:00:02" (1/1) ... [2021-10-13 01:00:02,359 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 01:00:02,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 01:00:02,777 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/sv-benchmarks/c/forester-heap/dll-reverse.i[22309,22322] [2021-10-13 01:00:02,804 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/sv-benchmarks/c/forester-heap/dll-reverse.i[22394,22407] [2021-10-13 01:00:02,812 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/sv-benchmarks/c/forester-heap/dll-reverse.i[22924,22937] [2021-10-13 01:00:02,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:00:02,849 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 01:00:02,928 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/sv-benchmarks/c/forester-heap/dll-reverse.i[22309,22322] [2021-10-13 01:00:02,942 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/sv-benchmarks/c/forester-heap/dll-reverse.i[22394,22407] [2021-10-13 01:00:02,950 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/sv-benchmarks/c/forester-heap/dll-reverse.i[22924,22937] [2021-10-13 01:00:02,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:00:03,018 INFO L208 MainTranslator]: Completed translation [2021-10-13 01:00:03,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:00:03 WrapperNode [2021-10-13 01:00:03,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 01:00:03,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 01:00:03,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 01:00:03,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 01:00:03,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:00:03" (1/1) ... [2021-10-13 01:00:03,082 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:00:03" (1/1) ... [2021-10-13 01:00:03,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 01:00:03,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 01:00:03,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 01:00:03,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 01:00:03,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:00:03" (1/1) ... [2021-10-13 01:00:03,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:00:03" (1/1) ... [2021-10-13 01:00:03,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:00:03" (1/1) ... [2021-10-13 01:00:03,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:00:03" (1/1) ... [2021-10-13 01:00:03,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:00:03" (1/1) ... [2021-10-13 01:00:03,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:00:03" (1/1) ... [2021-10-13 01:00:03,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:00:03" (1/1) ... [2021-10-13 01:00:03,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 01:00:03,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 01:00:03,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 01:00:03,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 01:00:03,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:00:03" (1/1) ... [2021-10-13 01:00:03,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:00:03,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:00:03,215 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 01:00:03,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 01:00:03,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 01:00:03,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 01:00:03,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 01:00:03,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 01:00:03,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 01:00:03,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 01:00:03,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 01:00:03,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 01:00:03,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 01:00:03,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 01:00:04,365 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 01:00:04,365 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-13 01:00:04,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:00:04 BoogieIcfgContainer [2021-10-13 01:00:04,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 01:00:04,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 01:00:04,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 01:00:04,377 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 01:00:04,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:00:02" (1/3) ... [2021-10-13 01:00:04,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c71774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:00:04, skipping insertion in model container [2021-10-13 01:00:04,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:00:03" (2/3) ... [2021-10-13 01:00:04,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c71774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:00:04, skipping insertion in model container [2021-10-13 01:00:04,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:00:04" (3/3) ... [2021-10-13 01:00:04,382 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-reverse.i [2021-10-13 01:00:04,389 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 01:00:04,390 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-13 01:00:04,465 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 01:00:04,476 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=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 01:00:04,476 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 01:00:04,507 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 34 states have internal predecessors, (56), 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) [2021-10-13 01:00:04,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 01:00:04,527 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:00:04,528 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:00:04,529 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:00:04,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:00:04,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1808873062, now seen corresponding path program 1 times [2021-10-13 01:00:04,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:00:04,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433934864] [2021-10-13 01:00:04,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:00:04,576 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:00:04,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:00:04,584 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:00:04,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 01:00:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:00:04,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 01:00:04,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:00:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:00:04,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:00:04,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:00:04,813 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:00:04,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433934864] [2021-10-13 01:00:04,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433934864] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:00:04,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:00:04,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 01:00:04,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100279597] [2021-10-13 01:00:04,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 01:00:04,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:00:04,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 01:00:04,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 01:00:04,848 INFO L87 Difference]: Start difference. First operand has 35 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 34 states have internal predecessors, (56), 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-10-13 01:00:04,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:00:04,877 INFO L93 Difference]: Finished difference Result 67 states and 107 transitions. [2021-10-13 01:00:04,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 01:00:04,878 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) Word has length 7 [2021-10-13 01:00:04,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:00:04,888 INFO L225 Difference]: With dead ends: 67 [2021-10-13 01:00:04,888 INFO L226 Difference]: Without dead ends: 29 [2021-10-13 01:00:04,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 01:00:04,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-13 01:00:04,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-13 01:00:04,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 28 states have internal predecessors, (35), 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) [2021-10-13 01:00:04,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-10-13 01:00:04,936 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 7 [2021-10-13 01:00:04,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:00:04,937 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-10-13 01:00:04,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-10-13 01:00:04,937 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-10-13 01:00:04,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 01:00:04,938 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:00:04,938 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:00:04,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 01:00:05,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:00:05,156 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:00:05,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:00:05,156 INFO L82 PathProgramCache]: Analyzing trace with hash 239687661, now seen corresponding path program 1 times [2021-10-13 01:00:05,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:00:05,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585689225] [2021-10-13 01:00:05,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:00:05,158 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:00:05,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:00:05,162 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:00:05,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 01:00:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:00:05,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 01:00:05,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:00:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:00:05,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:00:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:00:05,401 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:00:05,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585689225] [2021-10-13 01:00:05,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585689225] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:00:05,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:00:05,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 01:00:05,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780337870] [2021-10-13 01:00:05,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:00:05,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:00:05,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:00:05,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:00:05,411 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-10-13 01:00:05,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:00:05,791 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-10-13 01:00:05,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 01:00:05,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) Word has length 8 [2021-10-13 01:00:05,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:00:05,793 INFO L225 Difference]: With dead ends: 54 [2021-10-13 01:00:05,793 INFO L226 Difference]: Without dead ends: 40 [2021-10-13 01:00:05,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:00:05,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-13 01:00:05,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-10-13 01:00:05,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 33 states have internal predecessors, (41), 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) [2021-10-13 01:00:05,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-10-13 01:00:05,803 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 8 [2021-10-13 01:00:05,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:00:05,803 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-10-13 01:00:05,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-10-13 01:00:05,804 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-10-13 01:00:05,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 01:00:05,805 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:00:05,805 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:00:05,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 01:00:06,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:00:06,019 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:00:06,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:00:06,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1200905122, now seen corresponding path program 1 times [2021-10-13 01:00:06,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:00:06,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887360320] [2021-10-13 01:00:06,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:00:06,022 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:00:06,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:00:06,023 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:00:06,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 01:00:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:00:06,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 01:00:06,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:00:06,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-10-13 01:00:06,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-10-13 01:00:06,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:00:06,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:00:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:00:06,624 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:00:06,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887360320] [2021-10-13 01:00:06,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887360320] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 01:00:06,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:00:06,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-13 01:00:06,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480824489] [2021-10-13 01:00:06,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 01:00:06,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:00:06,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 01:00:06,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:00:06,639 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 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) [2021-10-13 01:00:07,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:00:07,470 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-10-13 01:00:07,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 01:00:07,471 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 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) Word has length 13 [2021-10-13 01:00:07,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:00:07,473 INFO L225 Difference]: With dead ends: 35 [2021-10-13 01:00:07,473 INFO L226 Difference]: Without dead ends: 31 [2021-10-13 01:00:07,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:00:07,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-13 01:00:07,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-10-13 01:00:07,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 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) [2021-10-13 01:00:07,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-10-13 01:00:07,480 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 13 [2021-10-13 01:00:07,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:00:07,480 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-10-13 01:00:07,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 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) [2021-10-13 01:00:07,481 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-10-13 01:00:07,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 01:00:07,482 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:00:07,482 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:00:07,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 01:00:07,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:00:07,702 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:00:07,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:00:07,703 INFO L82 PathProgramCache]: Analyzing trace with hash 825424614, now seen corresponding path program 1 times [2021-10-13 01:00:07,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:00:07,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1680257468] [2021-10-13 01:00:07,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:00:07,704 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:00:07,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:00:07,706 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:00:07,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 01:00:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:00:07,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 01:00:07,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:00:07,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 01:00:13,355 WARN L207 SmtUtils]: Spent 5.12 s on a formula simplification. DAG size of input: 81 DAG size of output: 33 [2021-10-13 01:00:13,357 INFO L354 Elim1Store]: treesize reduction 328, result has 15.7 percent of original size [2021-10-13 01:00:13,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 151 treesize of output 136 [2021-10-13 01:00:13,407 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 01:00:13,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 169 [2021-10-13 01:00:17,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:00:17,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 01:00:17,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 50 [2021-10-13 01:00:19,134 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-10-13 01:00:19,136 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 38 [2021-10-13 01:00:19,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:00:19,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:00:23,321 INFO L354 Elim1Store]: treesize reduction 306, result has 32.2 percent of original size [2021-10-13 01:00:23,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 150 treesize of output 189 [2021-10-13 01:00:28,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 01:00:28,810 INFO L354 Elim1Store]: treesize reduction 11, result has 79.6 percent of original size [2021-10-13 01:00:28,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 73 treesize of output 97 [2021-10-13 01:00:29,340 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-10-13 01:00:29,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 100 treesize of output 100 [2021-10-13 01:00:29,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 01:00:29,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 103 treesize of output 183 [2021-10-13 01:00:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:00:33,271 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:00:33,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1680257468] [2021-10-13 01:00:33,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1680257468] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 01:00:33,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:00:33,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-13 01:00:33,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792900786] [2021-10-13 01:00:33,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 01:00:33,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:00:33,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 01:00:33,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:00:33,274 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 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) [2021-10-13 01:00:41,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:00:41,738 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2021-10-13 01:00:41,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 01:00:41,739 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 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) Word has length 18 [2021-10-13 01:00:41,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:00:41,742 INFO L225 Difference]: With dead ends: 109 [2021-10-13 01:00:41,742 INFO L226 Difference]: Without dead ends: 99 [2021-10-13 01:00:41,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 452.9ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-10-13 01:00:41,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-13 01:00:41,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 43. [2021-10-13 01:00:41,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 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) [2021-10-13 01:00:41,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2021-10-13 01:00:41,755 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 18 [2021-10-13 01:00:41,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:00:41,756 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2021-10-13 01:00:41,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 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) [2021-10-13 01:00:41,756 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2021-10-13 01:00:41,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 01:00:41,757 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:00:41,758 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:00:41,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-10-13 01:00:41,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:00:41,979 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:00:41,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:00:41,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1505482984, now seen corresponding path program 1 times [2021-10-13 01:00:41,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:00:41,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612414032] [2021-10-13 01:00:41,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:00:41,981 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:00:41,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:00:41,982 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:00:41,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 01:00:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:00:42,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 01:00:42,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:00:42,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:00:42,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:00:42,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:00:42,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-13 01:00:42,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:00:42,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:00:42,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:00:42,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-13 01:00:42,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 01:00:42,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 64 [2021-10-13 01:00:42,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 01:00:42,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 46 [2021-10-13 01:00:42,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-10-13 01:00:42,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-10-13 01:00:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:00:42,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:00:42,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:00:42,827 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:00:42,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612414032] [2021-10-13 01:00:42,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612414032] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:00:42,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:00:42,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-13 01:00:42,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418532176] [2021-10-13 01:00:42,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 01:00:42,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:00:42,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 01:00:42,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-13 01:00:42,829 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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) [2021-10-13 01:00:44,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:00:44,444 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2021-10-13 01:00:44,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 01:00:44,445 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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) Word has length 18 [2021-10-13 01:00:44,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:00:44,446 INFO L225 Difference]: With dead ends: 76 [2021-10-13 01:00:44,446 INFO L226 Difference]: Without dead ends: 63 [2021-10-13 01:00:44,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 190.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:00:44,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-13 01:00:44,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 50. [2021-10-13 01:00:44,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 49 states have internal predecessors, (63), 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) [2021-10-13 01:00:44,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2021-10-13 01:00:44,459 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 18 [2021-10-13 01:00:44,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:00:44,459 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2021-10-13 01:00:44,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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) [2021-10-13 01:00:44,460 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2021-10-13 01:00:44,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 01:00:44,461 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:00:44,461 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:00:44,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 01:00:44,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:00:44,682 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:00:44,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:00:44,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1413183039, now seen corresponding path program 2 times [2021-10-13 01:00:44,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:00:44,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725238143] [2021-10-13 01:00:44,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 01:00:44,683 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:00:44,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:00:44,685 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:00:44,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 01:00:44,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 01:00:44,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:00:44,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 01:00:44,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:00:44,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 01:00:45,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 01:00:45,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:00:45,685 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-10-13 01:00:45,686 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 3 case distinctions, treesize of input 124 treesize of output 113 [2021-10-13 01:00:45,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:00:45,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:00:45,822 INFO L354 Elim1Store]: treesize reduction 237, result has 16.8 percent of original size [2021-10-13 01:00:45,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 114 [2021-10-13 01:00:45,842 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 01:00:45,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 93 [2021-10-13 01:00:46,226 INFO L354 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2021-10-13 01:00:46,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 86 [2021-10-13 01:00:46,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:00:46,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:00:46,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:00:46,273 INFO L354 Elim1Store]: treesize reduction 97, result has 8.5 percent of original size [2021-10-13 01:00:46,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 56 [2021-10-13 01:00:46,446 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-13 01:00:46,447 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 1 case distinctions, treesize of input 71 treesize of output 71 [2021-10-13 01:00:48,410 INFO L354 Elim1Store]: treesize reduction 78, result has 25.7 percent of original size [2021-10-13 01:00:48,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 60 [2021-10-13 01:00:49,905 INFO L354 Elim1Store]: treesize reduction 90, result has 23.1 percent of original size [2021-10-13 01:00:49,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 47 [2021-10-13 01:00:49,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:00:49,920 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 17 [2021-10-13 01:00:50,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-10-13 01:00:50,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-10-13 01:00:50,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 01:00:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:00:50,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:00:50,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 68 [2021-10-13 01:00:50,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 88 [2021-10-13 01:01:01,003 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_60 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_11) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) v_DerPreprocessor_10))) (.cse1 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset))) (store .cse0 .cse1 (store (store (select .cse0 .cse1) v_ULTIMATE.start_main_~x~0.offset_60 v_DerPreprocessor_9) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_60) v_DerPreprocessor_8))) c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~x~0.offset)) (_ bv1 32))) is different from false [2021-10-13 01:01:03,032 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_60 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~head~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~head~0.base) c_ULTIMATE.start_main_~head~0.offset v_DerPreprocessor_11) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32)) v_DerPreprocessor_10))) (.cse1 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~head~0.base) c_ULTIMATE.start_main_~head~0.offset))) (store .cse0 .cse1 (store (store (select .cse0 .cse1) v_ULTIMATE.start_main_~x~0.offset_60 v_DerPreprocessor_9) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_60) v_DerPreprocessor_8))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv8 32))) (_ bv1 32))) is different from false [2021-10-13 01:01:23,070 WARN L207 SmtUtils]: Spent 20.00 s on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2021-10-13 01:01:23,070 INFO L354 Elim1Store]: treesize reduction 306, result has 32.2 percent of original size [2021-10-13 01:01:23,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 429 treesize of output 468 [2021-10-13 01:01:23,077 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:01:23,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725238143] [2021-10-13 01:01:23,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-10-13 01:01:23,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [162220522] [2021-10-13 01:01:23,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 01:01:23,079 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 01:01:23,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/cvc4 [2021-10-13 01:01:23,105 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 01:01:23,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-13 01:01:23,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 01:01:23,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:01:23,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-13 01:01:23,559 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@cb94e35 [2021-10-13 01:01:23,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482355933] [2021-10-13 01:01:23,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 01:01:23,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:01:23,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:01:23,563 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:01:23,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 01:01:24,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 01:01:24,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:01:24,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 01:01:24,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@cb94e35 [2021-10-13 01:01:24,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:01:24,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 01:01:24,037 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-10-13 01:01:24,037 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 01:01:24,046 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 01:01:24,048 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 01:01:24,049 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 01:01:24,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-13 01:01:24,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 01:01:24,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-13 01:01:24,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:01:24,658 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 01:01:24,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 01:01:24 BoogieIcfgContainer [2021-10-13 01:01:24,685 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 01:01:24,685 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 01:01:24,697 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 01:01:24,697 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 01:01:24,698 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:00:04" (3/4) ... [2021-10-13 01:01:24,700 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 01:01:24,700 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 01:01:24,701 INFO L168 Benchmark]: Toolchain (without parser) took 82371.11 ms. Allocated memory was 81.8 MB in the beginning and 109.1 MB in the end (delta: 27.3 MB). Free memory was 60.9 MB in the beginning and 76.0 MB in the end (delta: -15.1 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. [2021-10-13 01:01:24,701 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 52.4 MB. Free memory is still 33.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:01:24,702 INFO L168 Benchmark]: CACSL2BoogieTranslator took 687.83 ms. Allocated memory is still 81.8 MB. Free memory was 60.7 MB in the beginning and 58.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 01:01:24,702 INFO L168 Benchmark]: Boogie Procedure Inliner took 110.73 ms. Allocated memory is still 81.8 MB. Free memory was 58.2 MB in the beginning and 56.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 01:01:24,702 INFO L168 Benchmark]: Boogie Preprocessor took 43.51 ms. Allocated memory is still 81.8 MB. Free memory was 56.2 MB in the beginning and 54.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 01:01:24,703 INFO L168 Benchmark]: RCFGBuilder took 1190.81 ms. Allocated memory is still 81.8 MB. Free memory was 54.1 MB in the beginning and 36.3 MB in the end (delta: 17.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-13 01:01:24,703 INFO L168 Benchmark]: TraceAbstraction took 80311.52 ms. Allocated memory was 81.8 MB in the beginning and 109.1 MB in the end (delta: 27.3 MB). Free memory was 35.6 MB in the beginning and 77.1 MB in the end (delta: -41.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:01:24,704 INFO L168 Benchmark]: Witness Printer took 15.25 ms. Allocated memory is still 109.1 MB. Free memory was 76.0 MB in the beginning and 76.0 MB in the end (delta: 2.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:01:24,706 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 52.4 MB. Free memory is still 33.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 687.83 ms. Allocated memory is still 81.8 MB. Free memory was 60.7 MB in the beginning and 58.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 110.73 ms. Allocated memory is still 81.8 MB. Free memory was 58.2 MB in the beginning and 56.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.51 ms. Allocated memory is still 81.8 MB. Free memory was 56.2 MB in the beginning and 54.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1190.81 ms. Allocated memory is still 81.8 MB. Free memory was 54.1 MB in the beginning and 36.3 MB in the end (delta: 17.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 80311.52 ms. Allocated memory was 81.8 MB in the beginning and 109.1 MB in the end (delta: 27.3 MB). Free memory was 35.6 MB in the beginning and 77.1 MB in the end (delta: -41.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 15.25 ms. Allocated memory is still 109.1 MB. Free memory was 76.0 MB in the beginning and 76.0 MB in the end (delta: 2.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 1049]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L996] DLL* head = malloc(sizeof(DLL)); [L997] head->next = ((void*)0) [L998] head->prev = ((void*)0) [L999] head->data = 0 [L1001] DLL* x = head; [L1004] COND FALSE !(__VERIFIER_nondet_int()) [L1007] x = head [L1008] EXPR x->next [L1008] COND FALSE !(x->next != ((void*)0) && __VERIFIER_nondet_int()) [L1013] COND FALSE !(!(x != ((void*)0))) [L1015] x->data = 1 [L1017] EXPR x->next [L1017] COND TRUE x->next == ((void*)0) [L1019] x->next = malloc(sizeof(DLL)) [L1019] EXPR x->next [L1019] x->next->prev = x [L1019] EXPR x->next [L1019] x = x->next [L1019] x->next = ((void*)0) [L1019] x->data = 2 [L1025] DLL* prev = ((void*)0); [L1026] x = head [L1027] COND TRUE x != ((void*)0) [L1029] EXPR x->next [L1029] DLL* next = x->next; [L1031] x->next = prev [L1032] x->prev = next [L1034] prev = x [L1036] x = next [L1027] COND TRUE x != ((void*)0) [L1029] EXPR x->next [L1029] DLL* next = x->next; [L1031] x->next = prev [L1032] x->prev = next [L1034] prev = x [L1036] x = next [L1027] COND FALSE !(x != ((void*)0)) [L1039] head = prev [L1042] x = head [L1043] COND TRUE x != ((void*)0) [L1045] EXPR x->data [L1045] int t1 = x->data; [L1046] int t2 = 0; [L1047] COND TRUE t1 == 2 [L1048] EXPR x->next [L1048] EXPR x->next->data [L1048] t2 = x->next->data [L1049] COND TRUE !(t1 != 2 || t2 == 1) [L1049] reach_error() - UnprovableResult [Line: 1010]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1013]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 35 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 80194.9ms, OverallIterations: 6, TraceHistogramMax: 2, EmptinessCheckTime: 31.2ms, AutomataDifference: 11382.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 138 SDtfs, 229 SDslu, 213 SDs, 0 SdLazy, 332 SolverSat, 114 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 10435.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 131 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 775.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=5, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 64.5ms AutomataMinimizationTime, 5 MinimizatonAttempts, 80 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 105.6ms SsaConstructionTime, 333.0ms SatisfiabilityAnalysisTime, 26643.6ms InterpolantComputationTime, 64 NumberOfCodeBlocks, 64 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 118 ConstructedInterpolants, 15 QuantifiedInterpolants, 1148 SizeOfPredicates, 17 NumberOfNonLiveVariables, 291 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 10 InterpolantComputations, 6 PerfectInterpolantSequences, 4/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-13 01:01:24,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e261370-33bb-49d8-ba5a-11dffb25ae57/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...