./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array17_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array17_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX --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 1bbdbab39b20ef0f9bb51ea0fb71bf773586866898cf5babc34262381f9b9103 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:32:32,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:32:32,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:32:32,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:32:32,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:32:32,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:32:32,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:32:32,127 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:32:32,129 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:32:32,131 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:32:32,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:32:32,133 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:32:32,134 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:32:32,135 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:32:32,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:32:32,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:32:32,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:32:32,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:32:32,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:32:32,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:32:32,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:32:32,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:32:32,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:32:32,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:32:32,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:32:32,157 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:32:32,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:32:32,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:32:32,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:32:32,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:32:32,161 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:32:32,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:32:32,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:32:32,164 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:32:32,165 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:32:32,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:32:32,166 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:32:32,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:32:32,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:32:32,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:32:32,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:32:32,170 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:32:32,197 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:32:32,197 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:32:32,198 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:32:32,198 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:32:32,199 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:32:32,199 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:32:32,199 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:32:32,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:32:32,200 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:32:32,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:32:32,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:32:32,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:32:32,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:32:32,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:32:32,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:32:32,201 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:32:32,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:32:32,202 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:32:32,202 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:32:32,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:32:32,202 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:32:32,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:32:32,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:32:32,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:32:32,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:32:32,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:32:32,204 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:32:32,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:32:32,204 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:32:32,204 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:32:32,204 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:32:32,205 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:32:32,205 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_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bbdbab39b20ef0f9bb51ea0fb71bf773586866898cf5babc34262381f9b9103 [2021-11-09 09:32:32,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:32:32,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:32:32,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:32:32,516 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:32:32,517 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:32:32,518 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-patterns/array17_pattern.c [2021-11-09 09:32:32,585 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/data/ed4e7f0e3/78936340510d4d7dafe8a60be059cda5/FLAG33a681d68 [2021-11-09 09:32:33,015 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:32:33,015 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/sv-benchmarks/c/array-patterns/array17_pattern.c [2021-11-09 09:32:33,022 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/data/ed4e7f0e3/78936340510d4d7dafe8a60be059cda5/FLAG33a681d68 [2021-11-09 09:32:33,417 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/data/ed4e7f0e3/78936340510d4d7dafe8a60be059cda5 [2021-11-09 09:32:33,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:32:33,422 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:32:33,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:32:33,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:32:33,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:32:33,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:32:33" (1/1) ... [2021-11-09 09:32:33,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d6ee9e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:33, skipping insertion in model container [2021-11-09 09:32:33,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:32:33" (1/1) ... [2021-11-09 09:32:33,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:32:33,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:32:33,634 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_84f8638e-7909-47e2-b733-65aa3d81dcbe/sv-benchmarks/c/array-patterns/array17_pattern.c[1441,1454] [2021-11-09 09:32:33,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:32:33,682 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:32:33,705 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_84f8638e-7909-47e2-b733-65aa3d81dcbe/sv-benchmarks/c/array-patterns/array17_pattern.c[1441,1454] [2021-11-09 09:32:33,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:32:33,731 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:32:33,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:33 WrapperNode [2021-11-09 09:32:33,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:32:33,733 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:32:33,733 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:32:33,734 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:32:33,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:33" (1/1) ... [2021-11-09 09:32:33,766 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:33" (1/1) ... [2021-11-09 09:32:33,810 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:32:33,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:32:33,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:32:33,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:32:33,822 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:33" (1/1) ... [2021-11-09 09:32:33,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:33" (1/1) ... [2021-11-09 09:32:33,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:33" (1/1) ... [2021-11-09 09:32:33,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:33" (1/1) ... [2021-11-09 09:32:33,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:33" (1/1) ... [2021-11-09 09:32:33,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:33" (1/1) ... [2021-11-09 09:32:33,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:33" (1/1) ... [2021-11-09 09:32:33,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:32:33,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:32:33,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:32:33,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:32:33,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:33" (1/1) ... [2021-11-09 09:32:33,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:32:33,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:33,923 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:32:33,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:32:33,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:32:33,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:32:33,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:32:33,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:32:33,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:32:33,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 09:32:33,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:32:34,279 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:32:34,280 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-09 09:32:34,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:32:34 BoogieIcfgContainer [2021-11-09 09:32:34,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:32:34,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:32:34,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:32:34,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:32:34,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:32:33" (1/3) ... [2021-11-09 09:32:34,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26ed1c93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:32:34, skipping insertion in model container [2021-11-09 09:32:34,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:33" (2/3) ... [2021-11-09 09:32:34,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26ed1c93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:32:34, skipping insertion in model container [2021-11-09 09:32:34,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:32:34" (3/3) ... [2021-11-09 09:32:34,292 INFO L111 eAbstractionObserver]: Analyzing ICFG array17_pattern.c [2021-11-09 09:32:34,312 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:32:34,312 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:32:34,378 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:32:34,385 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, mAutomataTypeConcurrency=PETRI_NET, 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 [2021-11-09 09:32:34,385 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 09:32:34,401 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 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) [2021-11-09 09:32:34,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 09:32:34,418 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:34,419 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:34,420 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:34,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:34,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1763201290, now seen corresponding path program 1 times [2021-11-09 09:32:34,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:34,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388838257] [2021-11-09 09:32:34,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:34,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:34,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:34,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388838257] [2021-11-09 09:32:34,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388838257] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:34,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:34,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:32:34,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257265764] [2021-11-09 09:32:34,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:32:34,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:34,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:32:34,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:32:34,631 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-11-09 09:32:34,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:34,646 INFO L93 Difference]: Finished difference Result 57 states and 88 transitions. [2021-11-09 09:32:34,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:32:34,648 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2021-11-09 09:32:34,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:34,656 INFO L225 Difference]: With dead ends: 57 [2021-11-09 09:32:34,657 INFO L226 Difference]: Without dead ends: 26 [2021-11-09 09:32:34,659 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:32:34,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-09 09:32:34,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-09 09:32:34,690 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) [2021-11-09 09:32:34,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-11-09 09:32:34,692 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 11 [2021-11-09 09:32:34,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:34,692 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-11-09 09:32:34,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-11-09 09:32:34,693 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-11-09 09:32:34,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 09:32:34,694 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:34,694 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:34,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:32:34,695 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:34,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:34,696 INFO L85 PathProgramCache]: Analyzing trace with hash -204009896, now seen corresponding path program 1 times [2021-11-09 09:32:34,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:34,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508365885] [2021-11-09 09:32:34,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:34,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:34,717 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:34,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551187457] [2021-11-09 09:32:34,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:34,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:34,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:34,724 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:34,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:32:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:34,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 09:32:34,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:35,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:35,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508365885] [2021-11-09 09:32:35,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:35,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551187457] [2021-11-09 09:32:35,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551187457] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:35,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:35,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:32:35,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440909734] [2021-11-09 09:32:35,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:32:35,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:35,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:32:35,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:32:35,014 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2021-11-09 09:32:35,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:35,040 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-11-09 09:32:35,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:32:35,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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 19 [2021-11-09 09:32:35,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:35,042 INFO L225 Difference]: With dead ends: 33 [2021-11-09 09:32:35,042 INFO L226 Difference]: Without dead ends: 29 [2021-11-09 09:32:35,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:32:35,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-09 09:32:35,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-09 09:32:35,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 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) [2021-11-09 09:32:35,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-11-09 09:32:35,049 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 19 [2021-11-09 09:32:35,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:35,049 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-11-09 09:32:35,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2021-11-09 09:32:35,050 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-11-09 09:32:35,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 09:32:35,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:35,051 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:35,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:35,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:35,279 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:35,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:35,280 INFO L85 PathProgramCache]: Analyzing trace with hash 285952244, now seen corresponding path program 1 times [2021-11-09 09:32:35,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:35,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82226168] [2021-11-09 09:32:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:35,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:35,308 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:35,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265285160] [2021-11-09 09:32:35,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:35,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:35,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:35,313 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:35,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:32:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:35,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:32:35,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:32:35,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:35,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82226168] [2021-11-09 09:32:35,506 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:35,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265285160] [2021-11-09 09:32:35,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265285160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:35,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:35,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:32:35,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647558565] [2021-11-09 09:32:35,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:32:35,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:35,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:32:35,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:32:35,510 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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) [2021-11-09 09:32:35,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:35,633 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2021-11-09 09:32:35,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:32:35,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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 [2021-11-09 09:32:35,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:35,634 INFO L225 Difference]: With dead ends: 61 [2021-11-09 09:32:35,634 INFO L226 Difference]: Without dead ends: 39 [2021-11-09 09:32:35,635 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:32:35,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-09 09:32:35,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2021-11-09 09:32:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 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) [2021-11-09 09:32:35,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-11-09 09:32:35,641 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 24 [2021-11-09 09:32:35,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:35,641 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-11-09 09:32:35,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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) [2021-11-09 09:32:35,642 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-11-09 09:32:35,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 09:32:35,643 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:35,643 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:35,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:35,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:35,867 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:35,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:35,868 INFO L85 PathProgramCache]: Analyzing trace with hash -785938365, now seen corresponding path program 1 times [2021-11-09 09:32:35,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:35,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944008438] [2021-11-09 09:32:35,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:35,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:35,891 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:35,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13011179] [2021-11-09 09:32:35,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:35,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:35,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:35,893 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:35,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:32:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:35,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:32:35,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:36,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:32:36,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:36,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944008438] [2021-11-09 09:32:36,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:36,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13011179] [2021-11-09 09:32:36,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13011179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:36,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:36,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:32:36,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257483090] [2021-11-09 09:32:36,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:32:36,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:36,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:32:36,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:32:36,076 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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) [2021-11-09 09:32:36,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:36,162 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2021-11-09 09:32:36,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:32:36,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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 27 [2021-11-09 09:32:36,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:36,164 INFO L225 Difference]: With dead ends: 58 [2021-11-09 09:32:36,164 INFO L226 Difference]: Without dead ends: 33 [2021-11-09 09:32:36,165 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:32:36,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-09 09:32:36,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2021-11-09 09:32:36,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 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) [2021-11-09 09:32:36,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-11-09 09:32:36,180 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 27 [2021-11-09 09:32:36,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:36,181 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-11-09 09:32:36,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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) [2021-11-09 09:32:36,181 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-11-09 09:32:36,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:32:36,184 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:36,184 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:36,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:36,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:36,403 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:36,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:36,404 INFO L85 PathProgramCache]: Analyzing trace with hash 817488613, now seen corresponding path program 1 times [2021-11-09 09:32:36,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:36,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210389298] [2021-11-09 09:32:36,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:36,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:36,421 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:36,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1382788610] [2021-11-09 09:32:36,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:36,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:36,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:36,423 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:36,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:32:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:36,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 09:32:36,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:36,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 09:32:36,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 09:32:37,506 INFO L354 Elim1Store]: treesize reduction 94, result has 1.1 percent of original size [2021-11-09 09:32:37,507 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 67 treesize of output 61 [2021-11-09 09:32:37,563 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 20 treesize of output 3 [2021-11-09 09:32:37,847 INFO L354 Elim1Store]: treesize reduction 388, result has 8.7 percent of original size [2021-11-09 09:32:37,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 208 treesize of output 225 [2021-11-09 09:32:37,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 3 [2021-11-09 09:32:37,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:37,947 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 0 case distinctions, treesize of input 60 treesize of output 22 [2021-11-09 09:32:37,968 INFO L354 Elim1Store]: treesize reduction 39, result has 2.5 percent of original size [2021-11-09 09:32:37,969 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 80 treesize of output 40 [2021-11-09 09:32:38,315 INFO L354 Elim1Store]: treesize reduction 23, result has 11.5 percent of original size [2021-11-09 09:32:38,316 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 62 treesize of output 35 [2021-11-09 09:32:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:38,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:38,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210389298] [2021-11-09 09:32:38,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:38,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382788610] [2021-11-09 09:32:38,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382788610] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:38,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:32:38,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-09 09:32:38,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216454330] [2021-11-09 09:32:38,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:32:38,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:38,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:32:38,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:32:38,404 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 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) [2021-11-09 09:32:39,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:39,432 INFO L93 Difference]: Finished difference Result 100 states and 123 transitions. [2021-11-09 09:32:39,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 09:32:39,432 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 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 [2021-11-09 09:32:39,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:39,435 INFO L225 Difference]: With dead ends: 100 [2021-11-09 09:32:39,435 INFO L226 Difference]: Without dead ends: 78 [2021-11-09 09:32:39,436 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-11-09 09:32:39,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-09 09:32:39,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 53. [2021-11-09 09:32:39,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.25) internal successors, (65), 52 states have internal predecessors, (65), 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) [2021-11-09 09:32:39,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2021-11-09 09:32:39,444 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 29 [2021-11-09 09:32:39,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:39,445 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2021-11-09 09:32:39,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 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) [2021-11-09 09:32:39,445 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2021-11-09 09:32:39,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:32:39,446 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:39,447 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:39,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:39,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:39,651 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:39,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:39,651 INFO L85 PathProgramCache]: Analyzing trace with hash -462375065, now seen corresponding path program 1 times [2021-11-09 09:32:39,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:39,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238878135] [2021-11-09 09:32:39,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:39,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:39,665 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:39,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790872135] [2021-11-09 09:32:39,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:39,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:39,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:39,687 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:39,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:32:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:39,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 09:32:39,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:32:39,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:39,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238878135] [2021-11-09 09:32:39,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:39,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790872135] [2021-11-09 09:32:39,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790872135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:39,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:39,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:32:39,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045941671] [2021-11-09 09:32:39,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:32:39,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:39,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:32:39,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:32:39,890 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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) [2021-11-09 09:32:39,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:39,918 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2021-11-09 09:32:39,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:32:39,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 [2021-11-09 09:32:39,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:39,921 INFO L225 Difference]: With dead ends: 89 [2021-11-09 09:32:39,921 INFO L226 Difference]: Without dead ends: 69 [2021-11-09 09:32:39,922 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:32:39,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-09 09:32:39,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2021-11-09 09:32:39,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 states have internal predecessors, (67), 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) [2021-11-09 09:32:39,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-11-09 09:32:39,941 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 29 [2021-11-09 09:32:39,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:39,941 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-11-09 09:32:39,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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) [2021-11-09 09:32:39,942 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-11-09 09:32:39,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:32:39,945 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:39,945 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:39,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:40,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 09:32:40,159 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:40,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:40,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1049181079, now seen corresponding path program 1 times [2021-11-09 09:32:40,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:40,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134089450] [2021-11-09 09:32:40,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:40,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:40,185 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:40,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1140738397] [2021-11-09 09:32:40,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:40,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:40,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:40,190 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:40,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:32:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:40,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 09:32:40,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:32:40,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:40,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134089450] [2021-11-09 09:32:40,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:40,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140738397] [2021-11-09 09:32:40,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140738397] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:40,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:32:40,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-09 09:32:40,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626520204] [2021-11-09 09:32:40,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:32:40,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:40,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:32:40,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:32:40,654 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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) [2021-11-09 09:32:41,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:41,055 INFO L93 Difference]: Finished difference Result 118 states and 143 transitions. [2021-11-09 09:32:41,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:32:41,057 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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 [2021-11-09 09:32:41,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:41,058 INFO L225 Difference]: With dead ends: 118 [2021-11-09 09:32:41,058 INFO L226 Difference]: Without dead ends: 96 [2021-11-09 09:32:41,059 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:32:41,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-09 09:32:41,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-11-09 09:32:41,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 70 states have internal predecessors, (86), 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) [2021-11-09 09:32:41,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2021-11-09 09:32:41,073 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 29 [2021-11-09 09:32:41,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:41,075 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2021-11-09 09:32:41,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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) [2021-11-09 09:32:41,076 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2021-11-09 09:32:41,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 09:32:41,078 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:41,079 INFO L513 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, 1, 1, 1] [2021-11-09 09:32:41,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:41,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:41,295 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:41,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:41,295 INFO L85 PathProgramCache]: Analyzing trace with hash -212199577, now seen corresponding path program 2 times [2021-11-09 09:32:41,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:41,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150508386] [2021-11-09 09:32:41,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:41,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:41,328 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:41,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841878515] [2021-11-09 09:32:41,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:32:41,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:41,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:41,335 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:41,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:32:41,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:32:41,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:41,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:32:41,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:41,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:41,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:41,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150508386] [2021-11-09 09:32:41,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:41,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841878515] [2021-11-09 09:32:41,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841878515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:41,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:32:41,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 09:32:41,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564136359] [2021-11-09 09:32:41,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:32:41,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:41,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:32:41,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:32:41,619 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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) [2021-11-09 09:32:41,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:41,771 INFO L93 Difference]: Finished difference Result 163 states and 192 transitions. [2021-11-09 09:32:41,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:32:41,772 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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 [2021-11-09 09:32:41,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:41,773 INFO L225 Difference]: With dead ends: 163 [2021-11-09 09:32:41,774 INFO L226 Difference]: Without dead ends: 118 [2021-11-09 09:32:41,774 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:32:41,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-09 09:32:41,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 80. [2021-11-09 09:32:41,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 79 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) [2021-11-09 09:32:41,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2021-11-09 09:32:41,786 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 31 [2021-11-09 09:32:41,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:41,787 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2021-11-09 09:32:41,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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) [2021-11-09 09:32:41,788 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2021-11-09 09:32:41,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 09:32:41,789 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:41,789 INFO L513 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, 1, 1, 1] [2021-11-09 09:32:41,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:42,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:42,014 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:42,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:42,014 INFO L85 PathProgramCache]: Analyzing trace with hash -182444793, now seen corresponding path program 3 times [2021-11-09 09:32:42,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:42,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969344803] [2021-11-09 09:32:42,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:42,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:42,031 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:42,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757225341] [2021-11-09 09:32:42,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:32:42,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:42,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:42,037 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:42,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:32:42,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:32:42,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:42,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 09:32:42,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:42,700 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 48 treesize of output 44 [2021-11-09 09:32:42,729 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 49 treesize of output 45 [2021-11-09 09:32:42,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2021-11-09 09:32:42,768 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 46 treesize of output 42 [2021-11-09 09:32:42,795 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 29 treesize of output 25 [2021-11-09 09:32:42,804 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-09 09:32:42,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-09 09:32:42,834 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-09 09:32:43,089 INFO L354 Elim1Store]: treesize reduction 23, result has 11.5 percent of original size [2021-11-09 09:32:43,090 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 62 treesize of output 35 [2021-11-09 09:32:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:32:43,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:43,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969344803] [2021-11-09 09:32:43,168 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:43,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757225341] [2021-11-09 09:32:43,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757225341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:43,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:32:43,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-09 09:32:43,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071938680] [2021-11-09 09:32:43,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 09:32:43,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:43,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 09:32:43,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:32:43,174 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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) [2021-11-09 09:32:44,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:44,012 INFO L93 Difference]: Finished difference Result 190 states and 224 transitions. [2021-11-09 09:32:44,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:32:44,013 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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 31 [2021-11-09 09:32:44,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:44,014 INFO L225 Difference]: With dead ends: 190 [2021-11-09 09:32:44,015 INFO L226 Difference]: Without dead ends: 159 [2021-11-09 09:32:44,015 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-11-09 09:32:44,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-09 09:32:44,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 113. [2021-11-09 09:32:44,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.2053571428571428) internal successors, (135), 112 states have internal predecessors, (135), 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) [2021-11-09 09:32:44,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 135 transitions. [2021-11-09 09:32:44,036 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 135 transitions. Word has length 31 [2021-11-09 09:32:44,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:44,036 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 135 transitions. [2021-11-09 09:32:44,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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) [2021-11-09 09:32:44,037 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 135 transitions. [2021-11-09 09:32:44,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 09:32:44,039 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:44,039 INFO L513 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, 1, 1, 1] [2021-11-09 09:32:44,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:44,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:44,263 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:44,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:44,263 INFO L85 PathProgramCache]: Analyzing trace with hash -2049114485, now seen corresponding path program 2 times [2021-11-09 09:32:44,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:44,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303328076] [2021-11-09 09:32:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:44,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:44,292 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:44,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465381041] [2021-11-09 09:32:44,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:32:44,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:44,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:44,294 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:44,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:32:44,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:32:44,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:44,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:32:44,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:44,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:44,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303328076] [2021-11-09 09:32:44,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:44,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465381041] [2021-11-09 09:32:44,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465381041] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:44,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:32:44,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 09:32:44,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591876266] [2021-11-09 09:32:44,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:32:44,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:44,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:32:44,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:32:44,649 INFO L87 Difference]: Start difference. First operand 113 states and 135 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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) [2021-11-09 09:32:44,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:44,773 INFO L93 Difference]: Finished difference Result 140 states and 162 transitions. [2021-11-09 09:32:44,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:32:44,773 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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 [2021-11-09 09:32:44,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:44,774 INFO L225 Difference]: With dead ends: 140 [2021-11-09 09:32:44,774 INFO L226 Difference]: Without dead ends: 114 [2021-11-09 09:32:44,775 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:32:44,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-09 09:32:44,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 101. [2021-11-09 09:32:44,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.18) internal successors, (118), 100 states have internal predecessors, (118), 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) [2021-11-09 09:32:44,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2021-11-09 09:32:44,793 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 31 [2021-11-09 09:32:44,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:44,793 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2021-11-09 09:32:44,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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) [2021-11-09 09:32:44,793 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2021-11-09 09:32:44,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 09:32:44,794 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:44,795 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:44,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:45,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 09:32:45,023 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:45,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:45,023 INFO L85 PathProgramCache]: Analyzing trace with hash 924471561, now seen corresponding path program 4 times [2021-11-09 09:32:45,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:45,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374998328] [2021-11-09 09:32:45,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:45,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:45,034 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:45,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605266994] [2021-11-09 09:32:45,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:32:45,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:45,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:45,063 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:45,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:32:45,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:32:45,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:45,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:32:45,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:45,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:32:45,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:45,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374998328] [2021-11-09 09:32:45,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:45,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605266994] [2021-11-09 09:32:45,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605266994] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:45,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:32:45,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 09:32:45,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464934911] [2021-11-09 09:32:45,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:32:45,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:45,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:32:45,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:32:45,427 INFO L87 Difference]: Start difference. First operand 101 states and 118 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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) [2021-11-09 09:32:45,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:45,545 INFO L93 Difference]: Finished difference Result 138 states and 160 transitions. [2021-11-09 09:32:45,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:32:45,546 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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 33 [2021-11-09 09:32:45,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:45,547 INFO L225 Difference]: With dead ends: 138 [2021-11-09 09:32:45,547 INFO L226 Difference]: Without dead ends: 114 [2021-11-09 09:32:45,547 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:32:45,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-09 09:32:45,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2021-11-09 09:32:45,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1666666666666667) internal successors, (112), 96 states have internal predecessors, (112), 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) [2021-11-09 09:32:45,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2021-11-09 09:32:45,557 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 33 [2021-11-09 09:32:45,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:45,557 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2021-11-09 09:32:45,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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) [2021-11-09 09:32:45,557 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2021-11-09 09:32:45,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 09:32:45,558 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:45,558 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:45,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:45,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:45,783 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:45,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:45,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1164461191, now seen corresponding path program 5 times [2021-11-09 09:32:45,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:45,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824929180] [2021-11-09 09:32:45,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:45,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:45,803 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:45,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110474100] [2021-11-09 09:32:45,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:32:45,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:45,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:45,810 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:45,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:32:46,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 09:32:46,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:46,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:32:46,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 09:32:46,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:46,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824929180] [2021-11-09 09:32:46,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:46,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110474100] [2021-11-09 09:32:46,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110474100] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:46,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:32:46,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 09:32:46,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784602376] [2021-11-09 09:32:46,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:32:46,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:46,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:32:46,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:32:46,140 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 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) [2021-11-09 09:32:46,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:46,288 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2021-11-09 09:32:46,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:32:46,288 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 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 34 [2021-11-09 09:32:46,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:46,289 INFO L225 Difference]: With dead ends: 112 [2021-11-09 09:32:46,289 INFO L226 Difference]: Without dead ends: 54 [2021-11-09 09:32:46,290 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:32:46,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-09 09:32:46,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-11-09 09:32:46,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 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) [2021-11-09 09:32:46,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-11-09 09:32:46,296 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 34 [2021-11-09 09:32:46,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:46,296 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-11-09 09:32:46,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 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) [2021-11-09 09:32:46,297 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-11-09 09:32:46,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:32:46,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:46,297 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:46,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-09 09:32:46,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 09:32:46,511 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:46,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:46,511 INFO L85 PathProgramCache]: Analyzing trace with hash -451868680, now seen corresponding path program 6 times [2021-11-09 09:32:46,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:46,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751903327] [2021-11-09 09:32:46,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:46,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:46,521 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:46,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [84546344] [2021-11-09 09:32:46,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:32:46,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:46,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:46,523 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:46,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:32:48,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 09:32:48,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:48,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-09 09:32:48,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:48,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-09 09:32:48,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-09 09:32:48,602 INFO L354 Elim1Store]: treesize reduction 128, result has 19.5 percent of original size [2021-11-09 09:32:48,603 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 75 treesize of output 91 [2021-11-09 09:32:48,635 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-09 09:32:48,635 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 36 treesize of output 7 [2021-11-09 09:32:48,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,689 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 0 case distinctions, treesize of input 34 treesize of output 7 [2021-11-09 09:32:48,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:48,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751903327] [2021-11-09 09:32:48,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:48,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84546344] [2021-11-09 09:32:48,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~column~0] [2021-11-09 09:32:48,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:48,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-09 09:32:48,975 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-09 09:32:48,976 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-09 09:32:48,982 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 09:32:49,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:49,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:49,197 INFO L731 BasicCegarLoop]: Path program histogram: [6, 2, 1, 1, 1, 1, 1] [2021-11-09 09:32:49,199 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-09 09:32:49,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 09:32:49 BoogieIcfgContainer [2021-11-09 09:32:49,219 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-09 09:32:49,220 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-09 09:32:49,220 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-09 09:32:49,220 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-09 09:32:49,221 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:32:34" (3/4) ... [2021-11-09 09:32:49,224 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-09 09:32:49,224 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-09 09:32:49,225 INFO L168 Benchmark]: Toolchain (without parser) took 15803.14 ms. Allocated memory was 88.1 MB in the beginning and 157.3 MB in the end (delta: 69.2 MB). Free memory was 52.1 MB in the beginning and 56.3 MB in the end (delta: -4.2 MB). Peak memory consumption was 65.1 MB. Max. memory is 16.1 GB. [2021-11-09 09:32:49,225 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 88.1 MB. Free memory was 68.7 MB in the beginning and 68.6 MB in the end (delta: 40.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 09:32:49,226 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.58 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 51.9 MB in the beginning and 82.6 MB in the end (delta: -30.7 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. [2021-11-09 09:32:49,226 INFO L168 Benchmark]: Boogie Procedure Inliner took 77.42 ms. Allocated memory is still 107.0 MB. Free memory was 82.6 MB in the beginning and 80.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 09:32:49,227 INFO L168 Benchmark]: Boogie Preprocessor took 63.25 ms. Allocated memory is still 107.0 MB. Free memory was 80.7 MB in the beginning and 79.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 09:32:49,227 INFO L168 Benchmark]: RCFGBuilder took 405.73 ms. Allocated memory is still 107.0 MB. Free memory was 79.3 MB in the beginning and 67.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-09 09:32:49,227 INFO L168 Benchmark]: TraceAbstraction took 14935.89 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 66.9 MB in the beginning and 56.3 MB in the end (delta: 10.6 MB). Peak memory consumption was 63.6 MB. Max. memory is 16.1 GB. [2021-11-09 09:32:49,228 INFO L168 Benchmark]: Witness Printer took 4.22 ms. Allocated memory is still 157.3 MB. Free memory is still 56.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 09:32:49,230 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 88.1 MB. Free memory was 68.7 MB in the beginning and 68.6 MB in the end (delta: 40.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 306.58 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 51.9 MB in the beginning and 82.6 MB in the end (delta: -30.7 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 77.42 ms. Allocated memory is still 107.0 MB. Free memory was 82.6 MB in the beginning and 80.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 63.25 ms. Allocated memory is still 107.0 MB. Free memory was 80.7 MB in the beginning and 79.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 405.73 ms. Allocated memory is still 107.0 MB. Free memory was 79.3 MB in the beginning and 67.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14935.89 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 66.9 MB in the beginning and 56.3 MB in the end (delta: 10.6 MB). Peak memory consumption was 63.6 MB. Max. memory is 16.1 GB. * Witness Printer took 4.22 ms. Allocated memory is still 157.3 MB. Free memory is still 56.3 MB. 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 35]: 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: [L39] signed long long ARR_SIZE ; [L43] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L33] COND FALSE !(!cond) [L46] int array[ARR_SIZE][ARR_SIZE] ; [L48] int row = 0, column = 0, num = -1 ; [L49] signed long long sum = 0 ; [L50] int temp ; [L51] short index1,index2 ; [L53] row=0 [L53] COND TRUE row main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX 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 -> 1bbdbab39b20ef0f9bb51ea0fb71bf773586866898cf5babc34262381f9b9103 [2021-11-09 09:32:52,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:32:52,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:32:52,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:32:52,513 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:32:52,513 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:32:52,514 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-patterns/array17_pattern.c [2021-11-09 09:32:52,605 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/data/bf83fe229/630fd49e16244793b093ce4225d5ab99/FLAG9c3e38e66 [2021-11-09 09:32:53,228 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:32:53,232 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/sv-benchmarks/c/array-patterns/array17_pattern.c [2021-11-09 09:32:53,241 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/data/bf83fe229/630fd49e16244793b093ce4225d5ab99/FLAG9c3e38e66 [2021-11-09 09:32:53,535 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/data/bf83fe229/630fd49e16244793b093ce4225d5ab99 [2021-11-09 09:32:53,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:32:53,541 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:32:53,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:32:53,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:32:53,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:32:53,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:32:53" (1/1) ... [2021-11-09 09:32:53,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10fa4c68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:53, skipping insertion in model container [2021-11-09 09:32:53,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:32:53" (1/1) ... [2021-11-09 09:32:53,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:32:53,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:32:53,712 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_84f8638e-7909-47e2-b733-65aa3d81dcbe/sv-benchmarks/c/array-patterns/array17_pattern.c[1441,1454] [2021-11-09 09:32:53,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:32:53,749 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:32:53,764 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_84f8638e-7909-47e2-b733-65aa3d81dcbe/sv-benchmarks/c/array-patterns/array17_pattern.c[1441,1454] [2021-11-09 09:32:53,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:32:53,849 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:32:53,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:53 WrapperNode [2021-11-09 09:32:53,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:32:53,851 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:32:53,851 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:32:53,852 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:32:53,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:53" (1/1) ... [2021-11-09 09:32:53,879 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:53" (1/1) ... [2021-11-09 09:32:53,917 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:32:53,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:32:53,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:32:53,919 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:32:53,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:53" (1/1) ... [2021-11-09 09:32:53,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:53" (1/1) ... [2021-11-09 09:32:53,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:53" (1/1) ... [2021-11-09 09:32:53,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:53" (1/1) ... [2021-11-09 09:32:53,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:53" (1/1) ... [2021-11-09 09:32:53,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:53" (1/1) ... [2021-11-09 09:32:53,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:53" (1/1) ... [2021-11-09 09:32:53,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:32:53,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:32:53,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:32:53,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:32:53,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:53" (1/1) ... [2021-11-09 09:32:53,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:32:54,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:54,020 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:32:54,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:32:54,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-09 09:32:54,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:32:54,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-09 09:32:54,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:32:54,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:32:54,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:32:54,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-09 09:32:54,700 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:32:54,700 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-09 09:32:54,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:32:54 BoogieIcfgContainer [2021-11-09 09:32:54,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:32:54,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:32:54,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:32:54,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:32:54,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:32:53" (1/3) ... [2021-11-09 09:32:54,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3368055a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:32:54, skipping insertion in model container [2021-11-09 09:32:54,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:53" (2/3) ... [2021-11-09 09:32:54,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3368055a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:32:54, skipping insertion in model container [2021-11-09 09:32:54,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:32:54" (3/3) ... [2021-11-09 09:32:54,712 INFO L111 eAbstractionObserver]: Analyzing ICFG array17_pattern.c [2021-11-09 09:32:54,718 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:32:54,718 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:32:54,777 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:32:54,784 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, mAutomataTypeConcurrency=PETRI_NET, 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 [2021-11-09 09:32:54,784 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 09:32:54,798 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 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) [2021-11-09 09:32:54,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 09:32:54,804 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:54,804 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:54,805 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:54,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:54,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1763201290, now seen corresponding path program 1 times [2021-11-09 09:32:54,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:32:54,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719034924] [2021-11-09 09:32:54,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:54,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:32:54,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:32:54,829 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:32:54,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-09 09:32:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:54,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-09 09:32:54,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:54,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:32:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:55,051 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:32:55,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719034924] [2021-11-09 09:32:55,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719034924] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:55,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:55,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 09:32:55,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023833896] [2021-11-09 09:32:55,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:32:55,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:32:55,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:32:55,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:32:55,076 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-11-09 09:32:55,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:55,093 INFO L93 Difference]: Finished difference Result 57 states and 88 transitions. [2021-11-09 09:32:55,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:32:55,094 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2021-11-09 09:32:55,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:55,102 INFO L225 Difference]: With dead ends: 57 [2021-11-09 09:32:55,103 INFO L226 Difference]: Without dead ends: 26 [2021-11-09 09:32:55,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:32:55,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-09 09:32:55,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-09 09:32:55,135 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) [2021-11-09 09:32:55,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-11-09 09:32:55,137 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 11 [2021-11-09 09:32:55,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:55,138 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-11-09 09:32:55,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-11-09 09:32:55,138 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-11-09 09:32:55,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 09:32:55,139 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:55,140 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:55,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:55,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:32:55,351 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:55,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:55,352 INFO L85 PathProgramCache]: Analyzing trace with hash -204009896, now seen corresponding path program 1 times [2021-11-09 09:32:55,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:32:55,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99490247] [2021-11-09 09:32:55,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:55,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:32:55,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:32:55,359 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:32:55,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-09 09:32:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:55,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:32:55,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:55,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:32:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:55,995 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:32:55,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99490247] [2021-11-09 09:32:55,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99490247] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:55,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:55,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-09 09:32:55,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812206716] [2021-11-09 09:32:55,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:32:55,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:32:55,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:32:56,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:32:56,000 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 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) [2021-11-09 09:32:56,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:56,080 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-11-09 09:32:56,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:32:56,081 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 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 19 [2021-11-09 09:32:56,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:56,082 INFO L225 Difference]: With dead ends: 33 [2021-11-09 09:32:56,082 INFO L226 Difference]: Without dead ends: 29 [2021-11-09 09:32:56,083 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:32:56,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-09 09:32:56,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-09 09:32:56,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 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) [2021-11-09 09:32:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-11-09 09:32:56,089 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 19 [2021-11-09 09:32:56,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:56,090 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-11-09 09:32:56,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 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) [2021-11-09 09:32:56,091 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-11-09 09:32:56,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 09:32:56,092 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:56,092 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:56,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:56,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:32:56,305 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:56,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:56,306 INFO L85 PathProgramCache]: Analyzing trace with hash 285952244, now seen corresponding path program 1 times [2021-11-09 09:32:56,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:32:56,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409446479] [2021-11-09 09:32:56,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:56,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:32:56,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:32:56,309 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:32:56,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-09 09:32:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:56,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:32:56,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:32:56,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:32:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:32:57,105 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:32:57,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409446479] [2021-11-09 09:32:57,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409446479] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:57,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:57,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-09 09:32:57,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843662867] [2021-11-09 09:32:57,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:32:57,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:32:57,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:32:57,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:32:57,110 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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) [2021-11-09 09:32:57,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:57,724 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2021-11-09 09:32:57,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:32:57,727 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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 [2021-11-09 09:32:57,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:57,728 INFO L225 Difference]: With dead ends: 61 [2021-11-09 09:32:57,728 INFO L226 Difference]: Without dead ends: 40 [2021-11-09 09:32:57,729 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:32:57,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-09 09:32:57,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2021-11-09 09:32:57,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 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) [2021-11-09 09:32:57,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-11-09 09:32:57,743 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 24 [2021-11-09 09:32:57,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:57,744 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-11-09 09:32:57,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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) [2021-11-09 09:32:57,744 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-11-09 09:32:57,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 09:32:57,745 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:57,745 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:57,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:57,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:32:57,946 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:57,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:57,947 INFO L85 PathProgramCache]: Analyzing trace with hash -785938365, now seen corresponding path program 1 times [2021-11-09 09:32:57,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:32:57,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319788663] [2021-11-09 09:32:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:57,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:32:57,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:32:57,950 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:32:57,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-09 09:32:58,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:58,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:32:58,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:32:58,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:32:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:32:58,636 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:32:58,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319788663] [2021-11-09 09:32:58,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319788663] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:58,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:58,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-09 09:32:58,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170335175] [2021-11-09 09:32:58,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:32:58,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:32:58,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:32:58,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:32:58,640 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-11-09 09:32:59,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:59,320 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2021-11-09 09:32:59,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:32:59,323 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) Word has length 27 [2021-11-09 09:32:59,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:59,324 INFO L225 Difference]: With dead ends: 59 [2021-11-09 09:32:59,324 INFO L226 Difference]: Without dead ends: 34 [2021-11-09 09:32:59,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:32:59,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-09 09:32:59,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2021-11-09 09:32:59,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 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) [2021-11-09 09:32:59,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-11-09 09:32:59,334 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 27 [2021-11-09 09:32:59,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:59,335 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-11-09 09:32:59,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-11-09 09:32:59,335 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-11-09 09:32:59,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:32:59,337 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:59,337 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:59,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:59,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:32:59,547 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:59,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:59,548 INFO L85 PathProgramCache]: Analyzing trace with hash 817488613, now seen corresponding path program 1 times [2021-11-09 09:32:59,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:32:59,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644722516] [2021-11-09 09:32:59,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:59,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:32:59,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:32:59,550 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:32:59,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-09 09:32:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:59,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 09:32:59,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:01,457 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 48 treesize of output 44 [2021-11-09 09:33:03,075 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-09 09:33:03,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 34 [2021-11-09 09:33:03,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:03,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:33:04,732 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 63 treesize of output 59 [2021-11-09 09:33:04,751 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 119 treesize of output 115 [2021-11-09 09:34:23,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:23,671 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:34:23,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644722516] [2021-11-09 09:34:23,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644722516] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:34:23,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:34:23,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-11-09 09:34:23,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867532935] [2021-11-09 09:34:23,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 09:34:23,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:34:23,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 09:34:23,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-11-09 09:34:23,675 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 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) [2021-11-09 09:34:44,698 WARN L207 SmtUtils]: Spent 6.33 s on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-11-09 09:35:01,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:01,416 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2021-11-09 09:35:01,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 09:35:01,417 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 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 29 [2021-11-09 09:35:01,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:01,419 INFO L225 Difference]: With dead ends: 99 [2021-11-09 09:35:01,419 INFO L226 Difference]: Without dead ends: 72 [2021-11-09 09:35:01,421 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 45.4s TimeCoverageRelationStatistics Valid=670, Invalid=2870, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 09:35:01,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-09 09:35:01,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 52. [2021-11-09 09:35:01,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 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) [2021-11-09 09:35:01,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-11-09 09:35:01,433 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 29 [2021-11-09 09:35:01,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:01,434 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-11-09 09:35:01,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 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) [2021-11-09 09:35:01,434 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-11-09 09:35:01,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 09:35:01,436 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:01,436 INFO L513 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, 1, 1, 1] [2021-11-09 09:35:01,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-09 09:35:01,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:35:01,647 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:01,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:01,648 INFO L85 PathProgramCache]: Analyzing trace with hash -212199577, now seen corresponding path program 2 times [2021-11-09 09:35:01,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:35:01,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713642314] [2021-11-09 09:35:01,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:35:01,649 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:35:01,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:35:01,650 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:35:01,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-09 09:35:01,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:35:01,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:35:01,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 09:35:01,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:35:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:35:02,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:35:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:35:03,058 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:35:03,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713642314] [2021-11-09 09:35:03,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713642314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:35:03,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:35:03,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-09 09:35:03,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143576648] [2021-11-09 09:35:03,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 09:35:03,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:35:03,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 09:35:03,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:35:03,061 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 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) [2021-11-09 09:35:05,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:05,641 INFO L93 Difference]: Finished difference Result 134 states and 159 transitions. [2021-11-09 09:35:05,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 09:35:05,643 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 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) Word has length 31 [2021-11-09 09:35:05,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:05,644 INFO L225 Difference]: With dead ends: 134 [2021-11-09 09:35:05,644 INFO L226 Difference]: Without dead ends: 108 [2021-11-09 09:35:05,646 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 09:35:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-09 09:35:05,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 77. [2021-11-09 09:35:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.2236842105263157) internal successors, (93), 76 states have internal predecessors, (93), 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) [2021-11-09 09:35:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2021-11-09 09:35:05,662 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 31 [2021-11-09 09:35:05,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:05,663 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2021-11-09 09:35:05,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 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) [2021-11-09 09:35:05,663 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2021-11-09 09:35:05,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 09:35:05,665 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:05,665 INFO L513 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, 1, 1, 1] [2021-11-09 09:35:05,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:35:05,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:35:05,880 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:05,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:05,880 INFO L85 PathProgramCache]: Analyzing trace with hash -182444793, now seen corresponding path program 3 times [2021-11-09 09:35:05,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:35:05,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276681326] [2021-11-09 09:35:05,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:35:05,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:35:05,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:35:05,882 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:35:05,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-09 09:35:06,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:35:06,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:35:06,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 09:35:06,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:35:08,001 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 48 treesize of output 44 [2021-11-09 09:35:09,592 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-09 09:35:09,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 34 [2021-11-09 09:35:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:35:09,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:35:11,361 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 63 treesize of output 59 [2021-11-09 09:35:11,365 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 119 treesize of output 115 [2021-11-09 09:37:02,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:37:02,713 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:37:02,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276681326] [2021-11-09 09:37:02,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276681326] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:37:02,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:02,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-11-09 09:37:02,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873390150] [2021-11-09 09:37:02,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 09:37:02,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:37:02,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 09:37:02,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2021-11-09 09:37:02,716 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2021-11-09 09:37:33,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:33,227 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2021-11-09 09:37:33,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 09:37:33,228 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 [2021-11-09 09:37:33,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:33,229 INFO L225 Difference]: With dead ends: 119 [2021-11-09 09:37:33,229 INFO L226 Difference]: Without dead ends: 75 [2021-11-09 09:37:33,231 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 41.4s TimeCoverageRelationStatistics Valid=586, Invalid=2384, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 09:37:33,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-09 09:37:33,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2021-11-09 09:37:33,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 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) [2021-11-09 09:37:33,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-11-09 09:37:33,245 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 31 [2021-11-09 09:37:33,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:33,245 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-11-09 09:37:33,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2021-11-09 09:37:33,246 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-11-09 09:37:33,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 09:37:33,247 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:33,247 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:33,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:33,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:37:33,464 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:33,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:33,465 INFO L85 PathProgramCache]: Analyzing trace with hash -759653290, now seen corresponding path program 4 times [2021-11-09 09:37:33,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:37:33,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106089652] [2021-11-09 09:37:33,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:37:33,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:37:33,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:37:33,468 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:37:33,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-09 09:37:33,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:37:33,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:33,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 09:37:33,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:34,572 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 09:37:34,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:37:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 09:37:34,955 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:37:34,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106089652] [2021-11-09 09:37:34,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106089652] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:37:34,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:34,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-09 09:37:34,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177504388] [2021-11-09 09:37:34,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 09:37:34,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:37:34,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 09:37:34,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:37:34,957 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 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) [2021-11-09 09:37:38,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:38,379 INFO L93 Difference]: Finished difference Result 129 states and 153 transitions. [2021-11-09 09:37:38,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 09:37:38,384 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 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 36 [2021-11-09 09:37:38,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:38,385 INFO L225 Difference]: With dead ends: 129 [2021-11-09 09:37:38,386 INFO L226 Difference]: Without dead ends: 95 [2021-11-09 09:37:38,387 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=330, Invalid=930, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 09:37:38,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-09 09:37:38,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2021-11-09 09:37:38,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.2162162162162162) internal successors, (90), 74 states have internal predecessors, (90), 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) [2021-11-09 09:37:38,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2021-11-09 09:37:38,409 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 36 [2021-11-09 09:37:38,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:38,409 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2021-11-09 09:37:38,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 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) [2021-11-09 09:37:38,409 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2021-11-09 09:37:38,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 09:37:38,411 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:38,411 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:38,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:38,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:37:38,626 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:38,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:38,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1067784180, now seen corresponding path program 5 times [2021-11-09 09:37:38,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:37:38,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288220628] [2021-11-09 09:37:38,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:37:38,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:37:38,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:37:38,628 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:37:38,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-09 09:37:38,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 09:37:38,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:38,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 09:37:38,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:37:39,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:37:39,873 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:37:39,874 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:37:39,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288220628] [2021-11-09 09:37:39,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288220628] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:37:39,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:39,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-11-09 09:37:39,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55640003] [2021-11-09 09:37:39,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:37:39,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:37:39,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:37:39,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:37:39,876 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2021-11-09 09:37:41,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:41,946 INFO L93 Difference]: Finished difference Result 232 states and 294 transitions. [2021-11-09 09:37:41,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 09:37:41,947 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 38 [2021-11-09 09:37:41,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:41,948 INFO L225 Difference]: With dead ends: 232 [2021-11-09 09:37:41,948 INFO L226 Difference]: Without dead ends: 172 [2021-11-09 09:37:41,949 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2021-11-09 09:37:41,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-09 09:37:41,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 74. [2021-11-09 09:37:41,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 73 states have internal predecessors, (89), 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) [2021-11-09 09:37:41,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2021-11-09 09:37:41,969 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 38 [2021-11-09 09:37:41,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:41,969 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2021-11-09 09:37:41,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2021-11-09 09:37:41,970 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2021-11-09 09:37:41,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 09:37:41,971 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:41,972 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:41,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-09 09:37:42,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:37:42,184 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:42,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:42,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1666751914, now seen corresponding path program 6 times [2021-11-09 09:37:42,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:37:42,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470909128] [2021-11-09 09:37:42,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:37:42,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:37:42,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:37:42,186 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:37:42,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-09 09:37:42,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-09 09:37:42,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:42,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 09:37:42,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:37:43,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:37:43,957 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:37:43,958 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:37:43,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470909128] [2021-11-09 09:37:43,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470909128] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:37:43,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:43,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-09 09:37:43,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168107775] [2021-11-09 09:37:43,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 09:37:43,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:37:43,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 09:37:43,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:37:43,961 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 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) [2021-11-09 09:37:45,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:45,115 INFO L93 Difference]: Finished difference Result 124 states and 146 transitions. [2021-11-09 09:37:45,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:37:45,117 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 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 40 [2021-11-09 09:37:45,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:45,118 INFO L225 Difference]: With dead ends: 124 [2021-11-09 09:37:45,119 INFO L226 Difference]: Without dead ends: 120 [2021-11-09 09:37:45,119 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:37:45,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-09 09:37:45,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 90. [2021-11-09 09:37:45,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.202247191011236) internal successors, (107), 89 states have internal predecessors, (107), 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) [2021-11-09 09:37:45,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 107 transitions. [2021-11-09 09:37:45,148 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 107 transitions. Word has length 40 [2021-11-09 09:37:45,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:45,149 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 107 transitions. [2021-11-09 09:37:45,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 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) [2021-11-09 09:37:45,149 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 107 transitions. [2021-11-09 09:37:45,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:37:45,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:45,151 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:45,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:45,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:37:45,363 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:45,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:45,364 INFO L85 PathProgramCache]: Analyzing trace with hash -451868680, now seen corresponding path program 7 times [2021-11-09 09:37:45,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:37:45,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160734989] [2021-11-09 09:37:45,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:37:45,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:37:45,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:37:45,366 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:37:45,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f8638e-7909-47e2-b733-65aa3d81dcbe/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-09 09:37:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:46,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 09:37:46,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:46,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-09 09:37:47,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:37:47,142 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 40 treesize of output 39 [2021-11-09 09:37:48,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:37:48,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:37:48,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:37:48,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:37:48,527 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 55 treesize of output 57 [2021-11-09 09:37:49,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:37:49,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:37:49,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:37:49,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:37:49,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:37:49,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:37:49,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:37:49,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 51 [2021-11-09 09:37:51,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:37:51,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:37:51,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:37:51,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:37:51,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:37:51,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:37:51,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:37:51,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:37:51,298 INFO L354 Elim1Store]: treesize reduction 63, result has 47.1 percent of original size [2021-11-09 09:37:51,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 65 treesize of output 108 [2021-11-09 09:37:53,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:37:53,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:37:53,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:37:53,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:37:53,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:37:53,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:37:53,402 INFO L354 Elim1Store]: treesize reduction 383, result has 21.7 percent of original size [2021-11-09 09:37:53,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 141 treesize of output 197