./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/conda.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/conda.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa --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 4382625030c70271d5cb32641146c4ec68928c0500a545b71e51fae395fc6041 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:01:03,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:01:03,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:01:03,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:01:03,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:01:03,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:01:03,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:01:03,127 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:01:03,129 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:01:03,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:01:03,130 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:01:03,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:01:03,132 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:01:03,133 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:01:03,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:01:03,137 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:01:03,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:01:03,139 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:01:03,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:01:03,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:01:03,146 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:01:03,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:01:03,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:01:03,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:01:03,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:01:03,153 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:01:03,154 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:01:03,155 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:01:03,156 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:01:03,157 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:01:03,157 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:01:03,158 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:01:03,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:01:03,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:01:03,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:01:03,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:01:03,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:01:03,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:01:03,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:01:03,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:01:03,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:01:03,163 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 22:01:03,186 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:01:03,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:01:03,187 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:01:03,187 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:01:03,187 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:01:03,187 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:01:03,188 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:01:03,188 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:01:03,188 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:01:03,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:01:03,189 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 22:01:03,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:01:03,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 22:01:03,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:01:03,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 22:01:03,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:01:03,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 22:01:03,190 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 22:01:03,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 22:01:03,190 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:01:03,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 22:01:03,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:01:03,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:01:03,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:01:03,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:01:03,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:01:03,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:01:03,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 22:01:03,196 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:01:03,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:01:03,197 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 22:01:03,197 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 22:01:03,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 22:01:03,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:01:03,197 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_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4382625030c70271d5cb32641146c4ec68928c0500a545b71e51fae395fc6041 [2021-12-06 22:01:03,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:01:03,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:01:03,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:01:03,409 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:01:03,409 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:01:03,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-fpi/conda.c [2021-12-06 22:01:03,452 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/data/d158a11f0/d9c38a03cf434942975f2b3e2c85c94f/FLAG83cbde12c [2021-12-06 22:01:03,828 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:01:03,828 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/sv-benchmarks/c/array-fpi/conda.c [2021-12-06 22:01:03,833 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/data/d158a11f0/d9c38a03cf434942975f2b3e2c85c94f/FLAG83cbde12c [2021-12-06 22:01:03,842 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/data/d158a11f0/d9c38a03cf434942975f2b3e2c85c94f [2021-12-06 22:01:03,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:01:03,845 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:01:03,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:01:03,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:01:03,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:01:03,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:01:03" (1/1) ... [2021-12-06 22:01:03,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@639d39ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:03, skipping insertion in model container [2021-12-06 22:01:03,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:01:03" (1/1) ... [2021-12-06 22:01:03,860 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:01:03,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:01:03,979 WARN L230 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_eb4720f0-98ce-413d-9c4c-013b55ea9dca/sv-benchmarks/c/array-fpi/conda.c[588,601] [2021-12-06 22:01:03,994 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:01:03,999 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:01:04,008 WARN L230 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_eb4720f0-98ce-413d-9c4c-013b55ea9dca/sv-benchmarks/c/array-fpi/conda.c[588,601] [2021-12-06 22:01:04,015 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:01:04,025 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:01:04,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:04 WrapperNode [2021-12-06 22:01:04,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:01:04,026 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:01:04,026 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:01:04,026 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:01:04,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:04" (1/1) ... [2021-12-06 22:01:04,037 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:04" (1/1) ... [2021-12-06 22:01:04,052 INFO L137 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 81 [2021-12-06 22:01:04,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:01:04,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:01:04,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:01:04,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:01:04,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:04" (1/1) ... [2021-12-06 22:01:04,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:04" (1/1) ... [2021-12-06 22:01:04,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:04" (1/1) ... [2021-12-06 22:01:04,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:04" (1/1) ... [2021-12-06 22:01:04,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:04" (1/1) ... [2021-12-06 22:01:04,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:04" (1/1) ... [2021-12-06 22:01:04,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:04" (1/1) ... [2021-12-06 22:01:04,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:01:04,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:01:04,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:01:04,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:01:04,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:04" (1/1) ... [2021-12-06 22:01:04,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:01:04,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:01:04,102 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:01:04,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:01:04,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 22:01:04,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 22:01:04,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 22:01:04,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 22:01:04,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 22:01:04,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:01:04,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:01:04,137 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 22:01:04,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 22:01:04,187 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:01:04,188 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:01:04,282 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:01:04,287 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:01:04,287 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 22:01:04,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:01:04 BoogieIcfgContainer [2021-12-06 22:01:04,289 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:01:04,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:01:04,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:01:04,293 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:01:04,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:01:03" (1/3) ... [2021-12-06 22:01:04,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b29f64b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:01:04, skipping insertion in model container [2021-12-06 22:01:04,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:04" (2/3) ... [2021-12-06 22:01:04,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b29f64b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:01:04, skipping insertion in model container [2021-12-06 22:01:04,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:01:04" (3/3) ... [2021-12-06 22:01:04,296 INFO L111 eAbstractionObserver]: Analyzing ICFG conda.c [2021-12-06 22:01:04,300 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:01:04,300 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 22:01:04,340 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:01:04,346 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 [2021-12-06 22:01:04,346 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 22:01:04,357 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 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) [2021-12-06 22:01:04,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 22:01:04,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:01:04,362 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:01:04,362 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:01:04,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:01:04,367 INFO L85 PathProgramCache]: Analyzing trace with hash -845640729, now seen corresponding path program 1 times [2021-12-06 22:01:04,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:01:04,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858022282] [2021-12-06 22:01:04,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:01:04,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:01:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:01:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:01:04,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:01:04,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858022282] [2021-12-06 22:01:04,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858022282] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:01:04,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:01:04,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:01:04,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190820729] [2021-12-06 22:01:04,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:01:04,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 22:01:04,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:01:04,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 22:01:04,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 22:01:04,516 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 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) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2021-12-06 22:01:04,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:01:04,532 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2021-12-06 22:01:04,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 22:01:04,534 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 22:01:04,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:01:04,542 INFO L225 Difference]: With dead ends: 40 [2021-12-06 22:01:04,543 INFO L226 Difference]: Without dead ends: 18 [2021-12-06 22:01:04,546 INFO L932 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 [2021-12-06 22:01:04,549 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:01:04,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:01:04,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-06 22:01:04,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-06 22:01:04,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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) [2021-12-06 22:01:04,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-12-06 22:01:04,578 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2021-12-06 22:01:04,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:01:04,579 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-12-06 22:01:04,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2021-12-06 22:01:04,579 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-12-06 22:01:04,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 22:01:04,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:01:04,580 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:01:04,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:01:04,581 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:01:04,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:01:04,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1238667739, now seen corresponding path program 1 times [2021-12-06 22:01:04,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:01:04,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487594949] [2021-12-06 22:01:04,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:01:04,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:01:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:01:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:01:04,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:01:04,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487594949] [2021-12-06 22:01:04,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487594949] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:01:04,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:01:04,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:01:04,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451003564] [2021-12-06 22:01:04,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:01:04,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:01:04,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:01:04,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:01:04,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:01:04,674 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-12-06 22:01:04,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:01:04,726 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-12-06 22:01:04,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:01:04,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 22:01:04,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:01:04,728 INFO L225 Difference]: With dead ends: 36 [2021-12-06 22:01:04,728 INFO L226 Difference]: Without dead ends: 25 [2021-12-06 22:01:04,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:01:04,730 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:01:04,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 11 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:01:04,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-06 22:01:04,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-12-06 22:01:04,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 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) [2021-12-06 22:01:04,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-12-06 22:01:04,737 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2021-12-06 22:01:04,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:01:04,737 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-12-06 22:01:04,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-12-06 22:01:04,738 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-12-06 22:01:04,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 22:01:04,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:01:04,739 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:01:04,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 22:01:04,739 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:01:04,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:01:04,740 INFO L85 PathProgramCache]: Analyzing trace with hash 2001188913, now seen corresponding path program 1 times [2021-12-06 22:01:04,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:01:04,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640977456] [2021-12-06 22:01:04,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:01:04,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:01:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:01:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:01:05,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:01:05,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640977456] [2021-12-06 22:01:05,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640977456] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:01:05,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276846309] [2021-12-06 22:01:05,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:01:05,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:01:05,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:01:05,108 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:01:05,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:01:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:01:05,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 22:01:05,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:01:05,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:01:05,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:01:05,275 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 14 treesize of output 16 [2021-12-06 22:01:05,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2021-12-06 22:01:05,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-12-06 22:01:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:01:05,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:01:05,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:01:05,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 28 [2021-12-06 22:01:05,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:01:05,860 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-12-06 22:01:05,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:01:05,865 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 22 treesize of output 14 [2021-12-06 22:01:05,869 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 14 treesize of output 10 [2021-12-06 22:01:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:01:05,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276846309] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:01:05,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:01:05,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 30 [2021-12-06 22:01:05,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143394038] [2021-12-06 22:01:05,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:01:05,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 22:01:05,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:01:05,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 22:01:05,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2021-12-06 22:01:05,889 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:01:06,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:01:06,097 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2021-12-06 22:01:06,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 22:01:06,097 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 22:01:06,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:01:06,100 INFO L225 Difference]: With dead ends: 38 [2021-12-06 22:01:06,100 INFO L226 Difference]: Without dead ends: 34 [2021-12-06 22:01:06,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 22:01:06,102 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:01:06,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 60 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 128 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2021-12-06 22:01:06,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-06 22:01:06,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2021-12-06 22:01:06,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 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) [2021-12-06 22:01:06,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-12-06 22:01:06,110 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2021-12-06 22:01:06,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:01:06,110 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-12-06 22:01:06,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:01:06,111 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-12-06 22:01:06,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 22:01:06,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:01:06,112 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:01:06,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 22:01:06,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:01:06,313 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:01:06,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:01:06,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1608161903, now seen corresponding path program 1 times [2021-12-06 22:01:06,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:01:06,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684602928] [2021-12-06 22:01:06,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:01:06,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:01:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:01:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:01:06,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:01:06,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684602928] [2021-12-06 22:01:06,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684602928] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:01:06,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127943575] [2021-12-06 22:01:06,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:01:06,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:01:06,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:01:06,530 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:01:06,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 22:01:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:01:06,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 22:01:06,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:01:06,586 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 18 treesize of output 14 [2021-12-06 22:01:06,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 22:01:06,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:01:06,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:01:06,654 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 14 treesize of output 12 [2021-12-06 22:01:06,656 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 22 treesize of output 20 [2021-12-06 22:01:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:01:06,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127943575] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:01:06,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:01:06,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-06 22:01:06,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087087343] [2021-12-06 22:01:06,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:01:06,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 22:01:06,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:01:06,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 22:01:06,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-06 22:01:06,668 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 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) [2021-12-06 22:01:06,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:01:06,730 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2021-12-06 22:01:06,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 22:01:06,731 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 22:01:06,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:01:06,731 INFO L225 Difference]: With dead ends: 48 [2021-12-06 22:01:06,731 INFO L226 Difference]: Without dead ends: 37 [2021-12-06 22:01:06,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:01:06,733 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:01:06,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 54 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:01:06,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-06 22:01:06,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-12-06 22:01:06,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 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) [2021-12-06 22:01:06,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-12-06 22:01:06,737 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 20 [2021-12-06 22:01:06,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:01:06,738 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-12-06 22:01:06,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 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) [2021-12-06 22:01:06,738 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-12-06 22:01:06,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 22:01:06,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:01:06,739 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:01:06,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 22:01:06,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:01:06,941 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:01:06,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:01:06,943 INFO L85 PathProgramCache]: Analyzing trace with hash -949569453, now seen corresponding path program 2 times [2021-12-06 22:01:06,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:01:06,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796132322] [2021-12-06 22:01:06,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:01:06,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:01:07,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:01:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:01:07,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:01:07,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796132322] [2021-12-06 22:01:07,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796132322] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:01:07,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719165115] [2021-12-06 22:01:07,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:01:07,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:01:07,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:01:07,105 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:01:07,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 22:01:07,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:01:07,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:01:07,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 22:01:07,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:01:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:01:07,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:01:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:01:07,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719165115] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:01:07,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:01:07,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-06 22:01:07,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764675488] [2021-12-06 22:01:07,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:01:07,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 22:01:07,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:01:07,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 22:01:07,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:01:07,220 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-12-06 22:01:07,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:01:07,292 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2021-12-06 22:01:07,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:01:07,293 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 22 [2021-12-06 22:01:07,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:01:07,293 INFO L225 Difference]: With dead ends: 70 [2021-12-06 22:01:07,293 INFO L226 Difference]: Without dead ends: 44 [2021-12-06 22:01:07,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-06 22:01:07,294 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:01:07,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 31 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:01:07,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-06 22:01:07,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2021-12-06 22:01:07,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 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) [2021-12-06 22:01:07,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-12-06 22:01:07,299 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2021-12-06 22:01:07,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:01:07,299 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-12-06 22:01:07,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-12-06 22:01:07,300 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-12-06 22:01:07,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 22:01:07,300 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:01:07,300 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:01:07,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 22:01:07,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:01:07,502 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:01:07,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:01:07,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2105967953, now seen corresponding path program 3 times [2021-12-06 22:01:07,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:01:07,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662976740] [2021-12-06 22:01:07,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:01:07,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:01:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:01:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:01:07,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:01:07,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662976740] [2021-12-06 22:01:07,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662976740] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:01:07,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097799369] [2021-12-06 22:01:07,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:01:07,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:01:07,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:01:07,582 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:01:07,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 22:01:07,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 22:01:07,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:01:07,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 22:01:07,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:01:07,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:01:07,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:01:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:01:07,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097799369] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:01:07,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:01:07,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-06 22:01:07,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781804170] [2021-12-06 22:01:07,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:01:07,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 22:01:07,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:01:07,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 22:01:07,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:01:07,724 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:01:07,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:01:07,802 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-12-06 22:01:07,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:01:07,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-06 22:01:07,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:01:07,803 INFO L225 Difference]: With dead ends: 39 [2021-12-06 22:01:07,803 INFO L226 Difference]: Without dead ends: 31 [2021-12-06 22:01:07,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-12-06 22:01:07,804 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:01:07,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 30 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:01:07,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-06 22:01:07,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-12-06 22:01:07,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 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) [2021-12-06 22:01:07,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-12-06 22:01:07,808 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 22 [2021-12-06 22:01:07,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:01:07,808 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-12-06 22:01:07,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:01:07,808 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-12-06 22:01:07,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 22:01:07,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:01:07,809 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:01:07,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 22:01:08,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 22:01:08,012 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:01:08,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:01:08,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1032594067, now seen corresponding path program 4 times [2021-12-06 22:01:08,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:01:08,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899344483] [2021-12-06 22:01:08,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:01:08,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:01:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:01:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:01:08,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:01:08,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899344483] [2021-12-06 22:01:08,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899344483] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:01:08,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495561293] [2021-12-06 22:01:08,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:01:08,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:01:08,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:01:08,593 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:01:08,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 22:01:08,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:01:08,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:01:08,633 WARN L261 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 22:01:08,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:01:08,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:01:08,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:01:08,676 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 14 treesize of output 16 [2021-12-06 22:01:08,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:01:08,712 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 14 treesize of output 16 [2021-12-06 22:01:08,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:01:08,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2021-12-06 22:01:08,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:01:08,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:01:08,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-12-06 22:01:09,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:01:09,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:01:09,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:01:09,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-12-06 22:01:09,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:01:09,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2021-12-06 22:01:09,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:01:09,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2021-12-06 22:01:09,311 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:01:09,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:01:10,125 INFO L354 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2021-12-06 22:01:10,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 554 treesize of output 290 [2021-12-06 22:01:10,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:01:10,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 67 [2021-12-06 22:01:10,313 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_4 (Array Int Int))) (let ((.cse2 (select v_arrayElimArr_4 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_4))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse0 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse1 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5))) (and (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) (div (+ .cse0 .cse1 .cse2) 2)) (<= (div (+ (- 1) .cse0 .cse1 .cse2) 2) |c_ULTIMATE.start_main_~i~0#1|)))))) (not (= 2 .cse2)) (not (= 2 (select v_arrayElimArr_4 .cse5)))))) is different from false [2021-12-06 22:01:10,353 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_4 (Array Int Int))) (let ((.cse2 (select v_arrayElimArr_4 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_4))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse0 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse1 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5))) (and (<= (div (+ (- 1) .cse0 .cse1 .cse2) 2) (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (<= (+ 2 |c_ULTIMATE.start_main_~i~0#1|) (div (+ .cse0 .cse1 .cse2) 2))))))) (not (= 2 .cse2)) (not (= 2 (select v_arrayElimArr_4 .cse5)))))) is different from false [2021-12-06 22:01:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-06 22:01:10,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495561293] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:01:10,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:01:10,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 50 [2021-12-06 22:01:10,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281009576] [2021-12-06 22:01:10,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:01:10,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 22:01:10,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:01:10,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 22:01:10,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1936, Unknown=2, NotChecked=186, Total=2450 [2021-12-06 22:01:10,404 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 50 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 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) [2021-12-06 22:02:00,034 WARN L227 SmtUtils]: Spent 12.86s on a formula simplification. DAG size of input: 72 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:02:07,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:02:07,676 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2021-12-06 22:02:07,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 22:02:07,677 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 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 [2021-12-06 22:02:07,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:02:07,678 INFO L225 Difference]: With dead ends: 63 [2021-12-06 22:02:07,678 INFO L226 Difference]: Without dead ends: 59 [2021-12-06 22:02:07,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 55.4s TimeCoverageRelationStatistics Valid=495, Invalid=2803, Unknown=16, NotChecked=226, Total=3540 [2021-12-06 22:02:07,681 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 41 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:02:07,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 99 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 546 Invalid, 0 Unknown, 116 Unchecked, 3.2s Time] [2021-12-06 22:02:07,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-06 22:02:07,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2021-12-06 22:02:07,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.175) internal successors, (47), 40 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) [2021-12-06 22:02:07,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-12-06 22:02:07,687 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 27 [2021-12-06 22:02:07,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:02:07,688 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-12-06 22:02:07,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 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) [2021-12-06 22:02:07,688 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-12-06 22:02:07,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 22:02:07,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:02:07,689 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:02:07,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 22:02:07,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:02:07,889 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:02:07,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:02:07,890 INFO L85 PathProgramCache]: Analyzing trace with hash -774428629, now seen corresponding path program 1 times [2021-12-06 22:02:07,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:02:07,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813423093] [2021-12-06 22:02:07,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:02:07,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:02:07,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:02:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:02:08,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:02:08,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813423093] [2021-12-06 22:02:08,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813423093] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:02:08,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489680411] [2021-12-06 22:02:08,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:02:08,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:02:08,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:02:08,805 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:02:08,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 22:02:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:02:08,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 22:02:08,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:02:08,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:02:09,322 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 22:02:09,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 22:02:09,489 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 19 treesize of output 7 [2021-12-06 22:02:09,659 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:02:09,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:02:10,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 22:02:10,236 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 28 treesize of output 24 [2021-12-06 22:02:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:02:10,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489680411] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:02:10,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:02:10,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 18 [2021-12-06 22:02:10,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352173004] [2021-12-06 22:02:10,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:02:10,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 22:02:10,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:02:10,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 22:02:10,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-12-06 22:02:10,340 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:12,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:02:12,399 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2021-12-06 22:02:12,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 22:02:12,400 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-06 22:02:12,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:02:12,401 INFO L225 Difference]: With dead ends: 62 [2021-12-06 22:02:12,401 INFO L226 Difference]: Without dead ends: 49 [2021-12-06 22:02:12,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-12-06 22:02:12,402 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:02:12,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 52 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 22:02:12,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-06 22:02:12,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-12-06 22:02:12,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:12,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-12-06 22:02:12,408 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 27 [2021-12-06 22:02:12,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:02:12,408 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-12-06 22:02:12,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:12,408 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-12-06 22:02:12,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 22:02:12,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:02:12,409 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:02:12,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 22:02:12,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 22:02:12,611 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:02:12,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:02:12,612 INFO L85 PathProgramCache]: Analyzing trace with hash -132219249, now seen corresponding path program 5 times [2021-12-06 22:02:12,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:02:12,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830787441] [2021-12-06 22:02:12,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:02:12,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:02:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:02:13,049 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 22:02:13,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:02:13,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830787441] [2021-12-06 22:02:13,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830787441] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:02:13,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336997592] [2021-12-06 22:02:13,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:02:13,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:02:13,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:02:13,051 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:02:13,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 22:02:13,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 22:02:13,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:02:13,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 22:02:13,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:02:13,732 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 22:02:13,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:02:14,041 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 22:02:14,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336997592] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:02:14,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:02:14,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-06 22:02:14,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307890324] [2021-12-06 22:02:14,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:02:14,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 22:02:14,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:02:14,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 22:02:14,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-06 22:02:14,043 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:14,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:02:14,952 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2021-12-06 22:02:14,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 22:02:14,952 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-06 22:02:14,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:02:14,953 INFO L225 Difference]: With dead ends: 86 [2021-12-06 22:02:14,953 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 22:02:14,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:02:14,955 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 74 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:02:14,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 35 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 22:02:14,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 22:02:14,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2021-12-06 22:02:14,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 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) [2021-12-06 22:02:14,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-12-06 22:02:14,962 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 29 [2021-12-06 22:02:14,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:02:14,962 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-12-06 22:02:14,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:14,962 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-12-06 22:02:14,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 22:02:14,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:02:14,963 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:02:14,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 22:02:15,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-06 22:02:15,165 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:02:15,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:02:15,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1292373713, now seen corresponding path program 6 times [2021-12-06 22:02:15,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:02:15,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744787539] [2021-12-06 22:02:15,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:02:15,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:02:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:02:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:02:15,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:02:15,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744787539] [2021-12-06 22:02:15,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744787539] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:02:15,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24260562] [2021-12-06 22:02:15,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:02:15,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:02:15,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:02:15,549 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:02:15,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 22:02:15,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-06 22:02:15,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:02:15,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 22:02:15,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:02:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 22:02:16,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:02:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 22:02:16,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24260562] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:02:16,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:02:16,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-06 22:02:16,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57226854] [2021-12-06 22:02:16,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:02:16,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 22:02:16,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:02:16,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 22:02:16,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-06 22:02:16,617 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 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) [2021-12-06 22:02:18,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:02:18,044 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2021-12-06 22:02:18,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 22:02:18,045 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 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 29 [2021-12-06 22:02:18,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:02:18,046 INFO L225 Difference]: With dead ends: 48 [2021-12-06 22:02:18,046 INFO L226 Difference]: Without dead ends: 38 [2021-12-06 22:02:18,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:02:18,047 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 67 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:02:18,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 25 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 22:02:18,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-06 22:02:18,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-12-06 22:02:18,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:18,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-12-06 22:02:18,053 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2021-12-06 22:02:18,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:02:18,053 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-12-06 22:02:18,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 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) [2021-12-06 22:02:18,053 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-12-06 22:02:18,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 22:02:18,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:02:18,054 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:02:18,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-06 22:02:18,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:02:18,256 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:02:18,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:02:18,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1250534543, now seen corresponding path program 7 times [2021-12-06 22:02:18,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:02:18,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296541703] [2021-12-06 22:02:18,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:02:18,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:02:18,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:02:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:02:25,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:02:25,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296541703] [2021-12-06 22:02:25,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296541703] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:02:25,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701727858] [2021-12-06 22:02:25,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:02:25,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:02:25,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:02:25,844 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:02:25,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 22:02:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:02:25,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-06 22:02:25,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:02:25,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:02:25,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:02:25,998 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 14 treesize of output 16 [2021-12-06 22:02:26,141 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 14 treesize of output 16 [2021-12-06 22:02:26,340 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 14 treesize of output 16 [2021-12-06 22:02:27,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2021-12-06 22:02:28,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:02:28,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 37 [2021-12-06 22:02:30,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:02:30,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:02:30,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:02:30,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2021-12-06 22:02:31,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:02:31,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:02:31,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:02:31,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:02:31,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-12-06 22:02:32,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:02:32,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:02:32,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:02:32,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:02:32,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:02:32,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 49 [2021-12-06 22:02:33,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 47 [2021-12-06 22:02:34,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 34 [2021-12-06 22:02:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:02:34,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:02:46,561 INFO L354 Elim1Store]: treesize reduction 476, result has 26.2 percent of original size [2021-12-06 22:02:46,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 6 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 9 new quantified variables, introduced 39 case distinctions, treesize of input 14664 treesize of output 4694 [2021-12-06 22:02:46,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:02:46,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:02:46,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:02:46,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-12-06 22:02:46,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:02:46,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:02:46,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:02:46,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-12-06 22:02:46,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:02:46,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:02:46,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:02:46,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 35 [2021-12-06 22:02:46,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:02:46,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:02:46,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:02:46,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 27 [2021-12-06 22:02:46,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:02:46,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:02:46,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:02:46,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-12-06 22:02:46,922 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_5 (Array Int Int)) (~N~0 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8))) (or (not (= 2 (select v_arrayElimArr_5 .cse0))) (= (* 2 ~N~0) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_5))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse4 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 2))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (+ .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 2 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) 2 .cse4)))))) (not (= 2 (select v_arrayElimArr_5 |c_ULTIMATE.start_main_~a~0#1.offset|))) (<= ~N~0 |c_ULTIMATE.start_main_~i~0#1|) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0) (not (= (select v_arrayElimArr_5 .cse5) 2))))) is different from false [2021-12-06 22:02:47,143 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_5 (Array Int Int)) (~N~0 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8))) (or (not (= 2 (select v_arrayElimArr_5 .cse0))) (= (* 2 ~N~0) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_5))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse4 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 2))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (+ .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 2 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) 2 .cse4)))))) (not (= 2 (select v_arrayElimArr_5 |c_ULTIMATE.start_main_~a~0#1.offset|))) (< (+ 2 |c_ULTIMATE.start_main_~i~0#1|) ~N~0) (not (= (select v_arrayElimArr_5 .cse5) 2)) (<= ~N~0 (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2021-12-06 22:02:47,571 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_5 (Array Int Int)) (~N~0 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8))) (or (not (= 2 (select v_arrayElimArr_5 .cse0))) (= (* 2 ~N~0) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_5))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse4 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 2))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (+ .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 2 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) 2 .cse4)))))) (not (= 2 (select v_arrayElimArr_5 |c_ULTIMATE.start_main_~a~0#1.offset|))) (<= ~N~0 (+ 2 |c_ULTIMATE.start_main_~i~0#1|)) (< (+ 3 |c_ULTIMATE.start_main_~i~0#1|) ~N~0) (not (= (select v_arrayElimArr_5 .cse5) 2))))) is different from false [2021-12-06 22:02:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-12-06 22:02:47,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701727858] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:02:47,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:02:47,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 63 [2021-12-06 22:02:47,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431645461] [2021-12-06 22:02:47,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:02:47,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-06 22:02:47,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:02:47,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-06 22:02:47,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=3099, Unknown=3, NotChecked=354, Total=3906 [2021-12-06 22:02:47,820 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 63 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 63 states have internal predecessors, (83), 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) [2021-12-06 22:03:13,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:03:13,103 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2021-12-06 22:03:13,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 22:03:13,105 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 63 states have internal predecessors, (83), 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 [2021-12-06 22:03:13,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:03:13,105 INFO L225 Difference]: With dead ends: 83 [2021-12-06 22:03:13,106 INFO L226 Difference]: Without dead ends: 69 [2021-12-06 22:03:13,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 28 SyntacticMatches, 8 SemanticMatches, 75 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1657 ImplicationChecksByTransitivity, 38.5s TimeCoverageRelationStatistics Valid=743, Invalid=4668, Unknown=3, NotChecked=438, Total=5852 [2021-12-06 22:03:13,109 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:03:13,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 145 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1085 Invalid, 0 Unknown, 199 Unchecked, 8.3s Time] [2021-12-06 22:03:13,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-06 22:03:13,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 54. [2021-12-06 22:03:13,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 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) [2021-12-06 22:03:13,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-12-06 22:03:13,117 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 34 [2021-12-06 22:03:13,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:03:13,117 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-12-06 22:03:13,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 63 states have internal predecessors, (83), 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) [2021-12-06 22:03:13,117 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-12-06 22:03:13,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 22:03:13,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:03:13,118 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:03:13,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-06 22:03:13,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 22:03:13,320 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:03:13,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:03:13,321 INFO L85 PathProgramCache]: Analyzing trace with hash 2033315503, now seen corresponding path program 2 times [2021-12-06 22:03:13,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:03:13,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950055852] [2021-12-06 22:03:13,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:03:13,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:03:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:03:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 22:03:14,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:03:14,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950055852] [2021-12-06 22:03:14,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950055852] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:03:14,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220986134] [2021-12-06 22:03:14,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:03:14,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:03:14,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:03:14,111 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:03:14,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 22:03:14,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:03:14,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:03:14,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 22:03:14,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:03:14,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:03:15,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:15,056 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 25 treesize of output 24 [2021-12-06 22:03:15,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:15,339 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 25 treesize of output 24 [2021-12-06 22:03:15,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 22:03:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 22:03:15,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:03:16,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 22:03:16,333 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 28 treesize of output 24 [2021-12-06 22:03:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 22:03:16,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220986134] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:03:16,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:03:16,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 19 [2021-12-06 22:03:16,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285441172] [2021-12-06 22:03:16,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:03:16,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:03:16,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:03:16,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:03:16,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:03:16,476 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:18,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:03:18,609 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2021-12-06 22:03:18,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 22:03:18,610 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-06 22:03:18,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:03:18,611 INFO L225 Difference]: With dead ends: 77 [2021-12-06 22:03:18,611 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 22:03:18,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-12-06 22:03:18,613 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:03:18,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 82 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 22:03:18,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 22:03:18,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2021-12-06 22:03:18,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 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) [2021-12-06 22:03:18,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-12-06 22:03:18,621 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 34 [2021-12-06 22:03:18,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:03:18,621 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-12-06 22:03:18,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:18,622 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-12-06 22:03:18,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 22:03:18,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:03:18,623 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:03:18,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 22:03:18,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:03:18,825 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:03:18,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:03:18,826 INFO L85 PathProgramCache]: Analyzing trace with hash 880380819, now seen corresponding path program 8 times [2021-12-06 22:03:18,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:03:18,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819970266] [2021-12-06 22:03:18,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:03:18,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:03:18,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:03:19,462 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 22:03:19,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:03:19,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819970266] [2021-12-06 22:03:19,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819970266] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:03:19,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599941288] [2021-12-06 22:03:19,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:03:19,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:03:19,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:03:19,464 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:03:19,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 22:03:19,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:03:19,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:03:19,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 22:03:19,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:03:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 22:03:20,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:03:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 22:03:20,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599941288] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:03:20,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:03:20,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-06 22:03:20,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750211732] [2021-12-06 22:03:20,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:03:20,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 22:03:20,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:03:20,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 22:03:20,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:03:20,925 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 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) [2021-12-06 22:03:22,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:03:22,424 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2021-12-06 22:03:22,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 22:03:22,424 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 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 [2021-12-06 22:03:22,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:03:22,425 INFO L225 Difference]: With dead ends: 99 [2021-12-06 22:03:22,425 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 22:03:22,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-12-06 22:03:22,427 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 94 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:03:22,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 34 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 22:03:22,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 22:03:22,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2021-12-06 22:03:22,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:22,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-12-06 22:03:22,436 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 36 [2021-12-06 22:03:22,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:03:22,436 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-12-06 22:03:22,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 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) [2021-12-06 22:03:22,436 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-12-06 22:03:22,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 22:03:22,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:03:22,437 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:03:22,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-06 22:03:22,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:03:22,639 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:03:22,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:03:22,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1466624367, now seen corresponding path program 9 times [2021-12-06 22:03:22,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:03:22,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549358105] [2021-12-06 22:03:22,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:03:22,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:03:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:03:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 22:03:23,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:03:23,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549358105] [2021-12-06 22:03:23,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549358105] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:03:23,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933867282] [2021-12-06 22:03:23,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:03:23,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:03:23,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:03:23,338 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:03:23,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 22:03:23,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 22:03:23,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:03:23,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 22:03:23,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:03:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 22:03:24,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:03:24,858 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 22:03:24,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933867282] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:03:24,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:03:24,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-06 22:03:24,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323525803] [2021-12-06 22:03:24,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:03:24,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 22:03:24,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:03:24,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 22:03:24,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:03:24,860 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:26,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:03:26,788 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-12-06 22:03:26,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 22:03:26,789 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-06 22:03:26,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:03:26,790 INFO L225 Difference]: With dead ends: 57 [2021-12-06 22:03:26,790 INFO L226 Difference]: Without dead ends: 45 [2021-12-06 22:03:26,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-12-06 22:03:26,791 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 73 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:03:26,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 33 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 22:03:26,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-06 22:03:26,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-12-06 22:03:26,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:26,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-12-06 22:03:26,797 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 36 [2021-12-06 22:03:26,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:03:26,797 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-12-06 22:03:26,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:26,798 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-12-06 22:03:26,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 22:03:26,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:03:26,798 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:03:26,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 22:03:26,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 22:03:27,000 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:03:27,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:03:27,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1118330549, now seen corresponding path program 10 times [2021-12-06 22:03:27,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:03:27,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800664758] [2021-12-06 22:03:27,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:03:27,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:03:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:03:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:03:37,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:03:37,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800664758] [2021-12-06 22:03:37,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800664758] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:03:37,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585503095] [2021-12-06 22:03:37,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:03:37,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:03:37,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:03:37,300 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:03:37,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 22:03:37,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:03:37,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:03:37,355 WARN L261 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-06 22:03:37,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:03:37,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:03:37,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:37,735 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 14 treesize of output 16 [2021-12-06 22:03:38,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:38,148 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 14 treesize of output 16 [2021-12-06 22:03:38,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:38,544 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 14 treesize of output 16 [2021-12-06 22:03:38,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:38,988 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 14 treesize of output 16 [2021-12-06 22:03:40,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:40,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2021-12-06 22:03:42,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:42,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:42,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2021-12-06 22:03:44,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:44,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:44,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:44,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:44,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 49 [2021-12-06 22:03:45,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:45,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:45,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:45,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:45,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:45,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:45,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:45,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2021-12-06 22:03:47,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:03:47,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:47,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:47,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:47,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:47,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:47,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:47,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:47,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 63 [2021-12-06 22:03:48,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:48,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:48,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:48,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:48,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:48,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:03:48,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:48,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:48,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:48,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 61 [2021-12-06 22:03:49,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:49,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:49,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:49,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:49,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:49,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:49,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:49,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:03:49,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:49,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 61 [2021-12-06 22:03:51,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:51,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2021-12-06 22:03:51,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:03:51,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 38 [2021-12-06 22:03:52,237 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:03:52,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:04:23,452 WARN L227 SmtUtils]: Spent 7.73s on a formula simplification. DAG size of input: 793 DAG size of output: 324 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-06 22:04:23,454 INFO L354 Elim1Store]: treesize reduction 3907, result has 18.3 percent of original size [2021-12-06 22:04:23,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 23 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 27 new quantified variables, introduced 190 case distinctions, treesize of input 2224890 treesize of output 511328 [2021-12-06 22:04:26,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:26,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:26,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:26,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:26,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:26,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:26,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 31 [2021-12-06 22:04:26,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:26,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:26,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:26,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:26,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:26,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:26,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 31 [2021-12-06 22:04:27,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 31 [2021-12-06 22:04:27,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 31 [2021-12-06 22:04:27,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 31 [2021-12-06 22:04:27,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 2149 treesize of output 2039 [2021-12-06 22:04:27,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 695 treesize of output 587 [2021-12-06 22:04:27,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 37 [2021-12-06 22:04:27,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-12-06 22:04:27,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 39 [2021-12-06 22:04:27,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:27,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 39 [2021-12-06 22:04:28,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:28,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:28,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:28,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:28,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:28,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:28,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 59 [2021-12-06 22:04:28,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:28,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:28,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:28,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:28,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:28,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:28,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 243 treesize of output 161 [2021-12-06 22:04:28,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:28,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:28,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:28,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:28,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:28,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:28,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 37 [2021-12-06 22:04:29,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 51 [2021-12-06 22:04:29,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 47 [2021-12-06 22:04:29,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 41 [2021-12-06 22:04:29,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 37 [2021-12-06 22:04:29,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-12-06 22:04:29,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 361 treesize of output 295 [2021-12-06 22:04:29,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 39 [2021-12-06 22:04:29,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:04:29,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 335 treesize of output 273 [2021-12-06 22:04:29,879 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_26 (Array Int Int)) (~N~0 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12)) (.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) (.cse1 (select v_arrayElimArr_26 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (not (= 2 (select v_arrayElimArr_26 .cse0))) (not (= 2 .cse1)) (not (= 2 (select v_arrayElimArr_26 .cse2))) (not (= 2 (select v_arrayElimArr_26 .cse3))) (= (* 2 ~N~0) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_26))) (let ((.cse6 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse8 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse4 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse3))) (let ((.cse7 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse4 .cse1 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2))) (+ .cse4 .cse1 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse4 .cse1 .cse7 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) .cse7 .cse8))))))) (<= ~N~0 |c_ULTIMATE.start_main_~i~0#1|) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0)))) is different from false [2021-12-06 22:04:30,238 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_26 (Array Int Int)) (~N~0 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12)) (.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) (.cse1 (select v_arrayElimArr_26 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (not (= 2 (select v_arrayElimArr_26 .cse0))) (not (= 2 .cse1)) (not (= 2 (select v_arrayElimArr_26 .cse2))) (< (+ 2 |c_ULTIMATE.start_main_~i~0#1|) ~N~0) (not (= 2 (select v_arrayElimArr_26 .cse3))) (= (* 2 ~N~0) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_26))) (let ((.cse6 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse8 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse4 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse3))) (let ((.cse7 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse4 .cse1 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2))) (+ .cse4 .cse1 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse4 .cse1 .cse7 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) .cse7 .cse8))))))) (<= ~N~0 (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2021-12-06 22:04:30,888 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_26 (Array Int Int)) (~N~0 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12)) (.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) (.cse1 (select v_arrayElimArr_26 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (not (= 2 (select v_arrayElimArr_26 .cse0))) (not (= 2 .cse1)) (not (= 2 (select v_arrayElimArr_26 .cse2))) (<= ~N~0 (+ 2 |c_ULTIMATE.start_main_~i~0#1|)) (not (= 2 (select v_arrayElimArr_26 .cse3))) (= (* 2 ~N~0) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_26))) (let ((.cse6 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse8 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse4 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse3))) (let ((.cse7 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse4 .cse1 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2))) (+ .cse4 .cse1 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse4 .cse1 .cse7 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) .cse7 .cse8))))))) (< (+ 3 |c_ULTIMATE.start_main_~i~0#1|) ~N~0)))) is different from false [2021-12-06 22:04:31,508 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_26 (Array Int Int)) (~N~0 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12)) (.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) (.cse1 (select v_arrayElimArr_26 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (<= ~N~0 (+ 3 |c_ULTIMATE.start_main_~i~0#1|)) (not (= 2 (select v_arrayElimArr_26 .cse0))) (not (= 2 .cse1)) (not (= 2 (select v_arrayElimArr_26 .cse2))) (not (= 2 (select v_arrayElimArr_26 .cse3))) (< (+ |c_ULTIMATE.start_main_~i~0#1| 4) ~N~0) (= (* 2 ~N~0) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_26))) (let ((.cse6 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse8 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse4 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse3))) (let ((.cse7 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse4 .cse1 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2))) (+ .cse4 .cse1 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse4 .cse1 .cse7 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) .cse7 .cse8)))))))))) is different from false [2021-12-06 22:04:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 16 not checked. [2021-12-06 22:04:31,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585503095] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:04:31,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:04:31,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 85 [2021-12-06 22:04:31,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121429884] [2021-12-06 22:04:31,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:04:31,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-06 22:04:31,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:04:31,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-06 22:04:31,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=758, Invalid=5734, Unknown=4, NotChecked=644, Total=7140 [2021-12-06 22:04:31,887 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 85 states, 85 states have (on average 1.3176470588235294) internal successors, (112), 85 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) [2021-12-06 22:05:50,556 WARN L227 SmtUtils]: Spent 14.97s on a formula simplification. DAG size of input: 222 DAG size of output: 179 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:05:58,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:58,028 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2021-12-06 22:05:58,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-06 22:05:58,031 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.3176470588235294) internal successors, (112), 85 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) Word has length 41 [2021-12-06 22:05:58,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:58,032 INFO L225 Difference]: With dead ends: 114 [2021-12-06 22:05:58,032 INFO L226 Difference]: Without dead ends: 94 [2021-12-06 22:05:58,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 124 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 5401 ImplicationChecksByTransitivity, 113.5s TimeCoverageRelationStatistics Valid=1715, Invalid=13059, Unknown=4, NotChecked=972, Total=15750 [2021-12-06 22:05:58,039 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 90 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 2059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:58,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 141 Invalid, 2059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 1389 Invalid, 0 Unknown, 264 Unchecked, 11.7s Time] [2021-12-06 22:05:58,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-06 22:05:58,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 65. [2021-12-06 22:05:58,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.140625) internal successors, (73), 64 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) [2021-12-06 22:05:58,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-12-06 22:05:58,050 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 41 [2021-12-06 22:05:58,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:58,051 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-12-06 22:05:58,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.3176470588235294) internal successors, (112), 85 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) [2021-12-06 22:05:58,051 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-12-06 22:05:58,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 22:05:58,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:58,052 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:58,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 22:05:58,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 22:05:58,253 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:58,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:58,255 INFO L85 PathProgramCache]: Analyzing trace with hash 97262195, now seen corresponding path program 3 times [2021-12-06 22:05:58,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:58,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085474373] [2021-12-06 22:05:58,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:58,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 22:06:00,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:00,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085474373] [2021-12-06 22:06:00,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085474373] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:00,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237117266] [2021-12-06 22:06:00,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:06:00,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:00,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:00,758 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:00,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 22:06:00,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 22:06:00,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:00,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 22:06:00,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:01,238 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 [2021-12-06 22:06:08,303 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 22:06:08,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-06 22:06:08,789 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-12-06 22:06:08,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2021-12-06 22:06:09,517 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-12-06 22:06:09,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 38 [2021-12-06 22:06:10,560 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:06:10,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2021-12-06 22:06:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:06:13,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:07:27,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2021-12-06 22:07:27,114 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 210 treesize of output 198 [2021-12-06 22:07:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 23 proven. 20 refuted. 2 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 22:07:27,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237117266] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:07:27,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:07:27,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 17] total 49 [2021-12-06 22:07:27,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919559652] [2021-12-06 22:07:27,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:07:27,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 22:07:27,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:07:27,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 22:07:27,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=1887, Unknown=20, NotChecked=0, Total=2352 [2021-12-06 22:07:27,174 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 49 states, 49 states have (on average 1.9183673469387754) internal successors, (94), 49 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) [2021-12-06 22:07:34,680 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= 4 c_~N~0) (exists ((|v_ULTIMATE.start_main_~i~0#1_202| Int)) (and (< |v_ULTIMATE.start_main_~i~0#1_202| c_~N~0) (<= c_~N~0 (+ |v_ULTIMATE.start_main_~i~0#1_202| 1)) (or (<= |v_ULTIMATE.start_main_~i~0#1_202| 1) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_202| 4))) 1)))) (or (<= c_~N~0 3) (forall ((v_ArrVal_698 Int) (v_ArrVal_697 Int) (|v_ULTIMATE.start_main_~i~0#1_215| Int) (|v_ULTIMATE.start_main_~i~0#1_217| Int) (|v_ULTIMATE.start_main_~i~0#1_218| Int)) (or (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_218| 4)) v_ArrVal_697) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_217| 4)) v_ArrVal_698) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_215| 4))) 1) (<= c_~N~0 |v_ULTIMATE.start_main_~i~0#1_215|) (< |v_ULTIMATE.start_main_~i~0#1_215| (+ |v_ULTIMATE.start_main_~i~0#1_217| 1)) (< (+ |v_ULTIMATE.start_main_~i~0#1_215| 1) c_~N~0) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_218|)))) (< 1 c_~N~0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) 12) 1) (<= |c_ULTIMATE.start_main_~i~0#1| 1)) is different from false [2021-12-06 22:07:36,692 WARN L838 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_698 Int) (v_ArrVal_697 Int) (|v_ULTIMATE.start_main_~i~0#1_215| Int) (|v_ULTIMATE.start_main_~i~0#1_217| Int)) (or (<= c_~N~0 |v_ULTIMATE.start_main_~i~0#1_215|) (< |v_ULTIMATE.start_main_~i~0#1_215| (+ |v_ULTIMATE.start_main_~i~0#1_217| 1)) (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) v_ArrVal_697) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_217| 4)) v_ArrVal_698) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_215| 4))) 1) (< (+ |v_ULTIMATE.start_main_~i~0#1_215| 1) c_~N~0))) (<= c_~N~0 3)) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= 4 c_~N~0) (<= |c_ULTIMATE.start_main_~i~0#1| 2) (exists ((|v_ULTIMATE.start_main_~i~0#1_202| Int)) (and (< |v_ULTIMATE.start_main_~i~0#1_202| c_~N~0) (<= c_~N~0 (+ |v_ULTIMATE.start_main_~i~0#1_202| 1)) (or (<= |v_ULTIMATE.start_main_~i~0#1_202| 1) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_202| 4))) 1)))) (< 1 c_~N~0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) 12) 1)) is different from false [2021-12-06 22:07:43,223 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= 4 c_~N~0) (<= |c_ULTIMATE.start_main_~i~0#1| 2) (exists ((|v_ULTIMATE.start_main_~i~0#1_202| Int)) (and (or (<= |v_ULTIMATE.start_main_~i~0#1_202| 1) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_202| 4))) 1) (= (* 4 |v_ULTIMATE.start_main_~i~0#1_202|) (* 4 |c_ULTIMATE.start_main_~i~0#1|))) (< |v_ULTIMATE.start_main_~i~0#1_202| c_~N~0) (<= c_~N~0 (+ |v_ULTIMATE.start_main_~i~0#1_202| 1)))) (or (forall ((v_ArrVal_698 Int) (|ULTIMATE.start_main_~i~0#1| Int) (|v_ULTIMATE.start_main_~i~0#1_215| Int)) (or (<= c_~N~0 |v_ULTIMATE.start_main_~i~0#1_215|) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) v_ArrVal_698) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_215| 4))) 1) (< (+ |v_ULTIMATE.start_main_~i~0#1_215| 1) c_~N~0) (< |v_ULTIMATE.start_main_~i~0#1_215| (+ |ULTIMATE.start_main_~i~0#1| 1)))) (<= c_~N~0 3)) (< 1 c_~N~0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) 12) 1)) is different from false [2021-12-06 22:08:01,950 WARN L227 SmtUtils]: Spent 10.17s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:08:49,506 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_main_#t~mem8#1| 1)) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* 4 |c_ULTIMATE.start_main_~i~0#1|)))) (and (or .cse0 (<= c_~N~0 2) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) c_~N~0)) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= |c_ULTIMATE.start_main_~i~0#1| 3) (or (not (= .cse1 12)) .cse0) (< |c_ULTIMATE.start_main_~i~0#1| c_~N~0) (or (forall ((v_ArrVal_698 Int) (|ULTIMATE.start_main_~i~0#1| Int) (|v_ULTIMATE.start_main_~i~0#1_215| Int)) (or (<= c_~N~0 |v_ULTIMATE.start_main_~i~0#1_215|) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) v_ArrVal_698) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_215| 4))) 1) (< (+ |v_ULTIMATE.start_main_~i~0#1_215| 1) c_~N~0) (< |v_ULTIMATE.start_main_~i~0#1_215| (+ |ULTIMATE.start_main_~i~0#1| 1)))) (<= c_~N~0 3)) (< 1 c_~N~0) (or (<= 4 c_~N~0) (< 11 .cse1)))) is different from false [2021-12-06 22:09:33,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:09:33,821 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2021-12-06 22:09:33,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 22:09:33,822 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9183673469387754) internal successors, (94), 49 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) Word has length 41 [2021-12-06 22:09:33,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:09:33,823 INFO L225 Difference]: With dead ends: 103 [2021-12-06 22:09:33,823 INFO L226 Difference]: Without dead ends: 75 [2021-12-06 22:09:33,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2285 ImplicationChecksByTransitivity, 207.8s TimeCoverageRelationStatistics Valid=1183, Invalid=5412, Unknown=63, NotChecked=652, Total=7310 [2021-12-06 22:09:33,829 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 52 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:09:33,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 44 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 285 Invalid, 0 Unknown, 125 Unchecked, 1.7s Time] [2021-12-06 22:09:33,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-06 22:09:33,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2021-12-06 22:09:33,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 67 states have internal predecessors, (77), 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) [2021-12-06 22:09:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2021-12-06 22:09:33,843 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 41 [2021-12-06 22:09:33,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:09:33,843 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2021-12-06 22:09:33,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.9183673469387754) internal successors, (94), 49 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) [2021-12-06 22:09:33,843 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2021-12-06 22:09:33,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 22:09:33,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:09:33,844 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:09:33,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-06 22:09:34,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 22:09:34,046 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:09:34,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:09:34,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1027067351, now seen corresponding path program 11 times [2021-12-06 22:09:34,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:09:34,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630337797] [2021-12-06 22:09:34,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:09:34,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:09:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:09:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-06 22:09:34,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:09:34,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630337797] [2021-12-06 22:09:34,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630337797] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:09:34,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158467879] [2021-12-06 22:09:34,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:09:34,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:09:34,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:09:34,687 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:09:34,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 22:09:34,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-06 22:09:34,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:09:34,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 22:09:34,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:09:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-06 22:09:36,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:09:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-06 22:09:36,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158467879] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:09:36,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:09:36,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-06 22:09:36,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050853876] [2021-12-06 22:09:36,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:09:36,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 22:09:36,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:09:36,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 22:09:36,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:09:36,652 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:38,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:09:38,430 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2021-12-06 22:09:38,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 22:09:38,431 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-06 22:09:38,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:09:38,432 INFO L225 Difference]: With dead ends: 109 [2021-12-06 22:09:38,432 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 22:09:38,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-12-06 22:09:38,433 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 119 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:09:38,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 43 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 22:09:38,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 22:09:38,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2021-12-06 22:09:38,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2021-12-06 22:09:38,440 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 43 [2021-12-06 22:09:38,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:09:38,441 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2021-12-06 22:09:38,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:38,441 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2021-12-06 22:09:38,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 22:09:38,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:09:38,441 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:09:38,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 22:09:38,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 22:09:38,643 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:09:38,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:09:38,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1824213007, now seen corresponding path program 12 times [2021-12-06 22:09:38,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:09:38,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185935571] [2021-12-06 22:09:38,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:09:38,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:09:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:09:39,485 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 22:09:39,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:09:39,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185935571] [2021-12-06 22:09:39,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185935571] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:09:39,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390238116] [2021-12-06 22:09:39,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:09:39,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:09:39,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:09:39,487 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:09:39,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 22:09:39,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 22:09:39,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:09:39,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 22:09:39,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:09:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 22:09:40,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:09:41,388 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 22:09:41,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390238116] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:09:41,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:09:41,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-06 22:09:41,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462657325] [2021-12-06 22:09:41,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:09:41,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 22:09:41,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:09:41,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 22:09:41,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:09:41,390 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 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) [2021-12-06 22:09:43,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:09:43,970 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2021-12-06 22:09:43,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 22:09:43,970 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 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) Word has length 46 [2021-12-06 22:09:43,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:09:43,971 INFO L225 Difference]: With dead ends: 61 [2021-12-06 22:09:43,971 INFO L226 Difference]: Without dead ends: 57 [2021-12-06 22:09:43,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2021-12-06 22:09:43,972 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 98 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:09:43,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 30 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 22:09:43,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-06 22:09:43,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2021-12-06 22:09:43,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 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) [2021-12-06 22:09:43,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2021-12-06 22:09:43,980 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 46 [2021-12-06 22:09:43,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:09:43,981 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2021-12-06 22:09:43,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 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) [2021-12-06 22:09:43,981 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2021-12-06 22:09:43,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 22:09:43,981 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:09:43,981 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:09:44,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-06 22:09:44,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 22:09:44,183 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:09:44,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:09:44,184 INFO L85 PathProgramCache]: Analyzing trace with hash 775276721, now seen corresponding path program 13 times [2021-12-06 22:09:44,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:09:44,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102790160] [2021-12-06 22:09:44,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:09:44,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:09:44,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:09:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:57,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:09:57,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102790160] [2021-12-06 22:09:57,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102790160] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:09:57,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953889947] [2021-12-06 22:09:57,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:09:57,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:09:57,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:09:57,436 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:09:57,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4720f0-98ce-413d-9c4c-013b55ea9dca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 22:09:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:09:57,509 WARN L261 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 113 conjunts are in the unsatisfiable core [2021-12-06 22:09:57,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:09:57,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:09:57,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:09:57,622 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 14 treesize of output 16 [2021-12-06 22:09:57,735 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 14 treesize of output 16 [2021-12-06 22:09:57,929 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 14 treesize of output 16 [2021-12-06 22:09:58,025 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 14 treesize of output 16 [2021-12-06 22:09:58,209 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 14 treesize of output 16 [2021-12-06 22:09:59,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2021-12-06 22:10:00,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:00,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2021-12-06 22:10:01,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:01,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:01,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:01,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 57 [2021-12-06 22:10:03,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:03,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:03,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:03,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:03,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:03,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:03,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 61 [2021-12-06 22:10:04,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:04,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:04,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:05,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:05,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:05,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:05,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:05,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:05,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:05,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:05,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 71 [2021-12-06 22:10:06,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:10:06,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:06,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:06,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:06,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:06,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:06,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:06,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:06,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:06,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:06,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:06,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 75 [2021-12-06 22:10:07,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:07,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:10:07,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:07,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:07,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:07,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:07,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:07,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:07,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:07,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:07,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:07,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 78 [2021-12-06 22:10:09,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:09,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:09,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:09,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:09,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:09,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:09,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:09,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:09,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:10:09,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:09,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:09,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:09,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 83 [2021-12-06 22:10:10,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:10,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:10,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:10,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:10,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:10,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:10,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:10,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:10,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:10,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:10,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:10:10,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:10,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:10,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 75 [2021-12-06 22:10:12,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 65 [2021-12-06 22:10:13,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 37 [2021-12-06 22:10:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:13,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:12:50,307 WARN L227 SmtUtils]: Spent 1.71m on a formula simplification. DAG size of input: 4992 DAG size of output: 1730 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-06 22:12:50,312 INFO L354 Elim1Store]: treesize reduction 32760, result has 13.4 percent of original size [2021-12-06 22:12:50,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 106 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 111 new quantified variables, introduced 1070 case distinctions, treesize of input 523116372 treesize of output 94432044 [2021-12-06 22:13:31,083 WARN L227 SmtUtils]: Spent 40.73s on a formula simplification that was a NOOP. DAG size: 20650 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:14:12,207 WARN L227 SmtUtils]: Spent 40.56s on a formula simplification that was a NOOP. DAG size: 20636 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)