./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/eureka_05.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/eureka_05.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8 --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 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 17:42:17,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:42:17,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:42:17,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:42:17,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:42:17,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:42:17,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:42:17,991 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:42:17,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:42:17,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:42:17,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:42:17,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:42:17,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:42:17,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:42:17,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:42:17,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:42:17,996 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:42:17,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:42:17,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:42:17,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:42:18,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:42:18,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:42:18,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:42:18,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:42:18,004 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:42:18,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:42:18,004 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:42:18,005 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:42:18,005 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:42:18,006 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:42:18,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:42:18,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:42:18,007 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:42:18,008 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:42:18,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:42:18,008 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:42:18,009 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:42:18,009 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:42:18,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:42:18,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:42:18,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:42:18,011 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 17:42:18,025 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:42:18,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:42:18,025 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:42:18,025 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:42:18,026 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:42:18,026 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:42:18,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:42:18,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:42:18,027 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:42:18,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:42:18,027 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:42:18,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:42:18,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:42:18,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:42:18,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 17:42:18,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:42:18,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 17:42:18,028 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:42:18,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 17:42:18,028 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:42:18,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 17:42:18,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:42:18,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:42:18,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:42:18,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:42:18,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:42:18,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:42:18,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 17:42:18,029 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:42:18,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:42:18,029 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:42:18,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 17:42:18,030 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:42:18,030 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:42:18,030 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:42:18,030 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab [2022-12-13 17:42:18,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:42:18,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:42:18,215 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:42:18,217 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:42:18,217 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:42:18,218 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/loops/eureka_05.i [2022-12-13 17:42:20,840 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:42:20,976 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:42:20,977 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/sv-benchmarks/c/loops/eureka_05.i [2022-12-13 17:42:20,981 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/data/58ae96a49/f32d9a69081948d1b7c8840855cb8faa/FLAGb4c5bd996 [2022-12-13 17:42:20,990 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/data/58ae96a49/f32d9a69081948d1b7c8840855cb8faa [2022-12-13 17:42:20,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:42:20,993 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:42:20,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:42:20,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:42:20,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:42:20,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:42:20" (1/1) ... [2022-12-13 17:42:20,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f6edd66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:42:20, skipping insertion in model container [2022-12-13 17:42:20,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:42:20" (1/1) ... [2022-12-13 17:42:21,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:42:21,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:42:21,117 WARN L237 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_435da0cd-db1e-4e17-aff3-5f58e854fa5c/sv-benchmarks/c/loops/eureka_05.i[810,823] [2022-12-13 17:42:21,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:42:21,140 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:42:21,149 WARN L237 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_435da0cd-db1e-4e17-aff3-5f58e854fa5c/sv-benchmarks/c/loops/eureka_05.i[810,823] [2022-12-13 17:42:21,156 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:42:21,167 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:42:21,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:42:21 WrapperNode [2022-12-13 17:42:21,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:42:21,168 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:42:21,168 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:42:21,168 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:42:21,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:42:21" (1/1) ... [2022-12-13 17:42:21,180 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:42:21" (1/1) ... [2022-12-13 17:42:21,195 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2022-12-13 17:42:21,196 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:42:21,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:42:21,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:42:21,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:42:21,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:42:21" (1/1) ... [2022-12-13 17:42:21,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:42:21" (1/1) ... [2022-12-13 17:42:21,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:42:21" (1/1) ... [2022-12-13 17:42:21,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:42:21" (1/1) ... [2022-12-13 17:42:21,209 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:42:21" (1/1) ... [2022-12-13 17:42:21,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:42:21" (1/1) ... [2022-12-13 17:42:21,213 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:42:21" (1/1) ... [2022-12-13 17:42:21,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:42:21" (1/1) ... [2022-12-13 17:42:21,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:42:21,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:42:21,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:42:21,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:42:21,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:42:21" (1/1) ... [2022-12-13 17:42:21,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:42:21,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:42:21,244 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:42:21,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:42:21,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:42:21,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:42:21,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:42:21,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:42:21,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:42:21,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:42:21,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 17:42:21,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:42:21,336 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:42:21,338 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:42:21,437 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:42:21,442 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:42:21,442 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 17:42:21,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:42:21 BoogieIcfgContainer [2022-12-13 17:42:21,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:42:21,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:42:21,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:42:21,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:42:21,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:42:20" (1/3) ... [2022-12-13 17:42:21,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e97f51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:42:21, skipping insertion in model container [2022-12-13 17:42:21,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:42:21" (2/3) ... [2022-12-13 17:42:21,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e97f51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:42:21, skipping insertion in model container [2022-12-13 17:42:21,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:42:21" (3/3) ... [2022-12-13 17:42:21,452 INFO L112 eAbstractionObserver]: Analyzing ICFG eureka_05.i [2022-12-13 17:42:21,466 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:42:21,466 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 17:42:21,502 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:42:21,508 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@ebc39c5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:42:21,508 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 17:42:21,511 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) [2022-12-13 17:42:21,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 17:42:21,516 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:42:21,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:42:21,517 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:42:21,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:42:21,521 INFO L85 PathProgramCache]: Analyzing trace with hash -2015864939, now seen corresponding path program 1 times [2022-12-13 17:42:21,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:42:21,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017709202] [2022-12-13 17:42:21,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:42:21,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:42:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:42:21,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:42:21,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:42:21,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017709202] [2022-12-13 17:42:21,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017709202] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:42:21,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:42:21,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:42:21,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575857332] [2022-12-13 17:42:21,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:42:21,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:42:21,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:42:21,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:42:21,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:42:21,723 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 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:21,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:42:21,750 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2022-12-13 17:42:21,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:42:21,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-12-13 17:42:21,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:42:21,759 INFO L225 Difference]: With dead ends: 42 [2022-12-13 17:42:21,759 INFO L226 Difference]: Without dead ends: 20 [2022-12-13 17:42:21,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:42:21,764 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:42:21,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 39 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:42:21,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-13 17:42:21,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-12-13 17:42:21,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:21,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-12-13 17:42:21,787 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2022-12-13 17:42:21,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:42:21,787 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-12-13 17:42:21,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:21,788 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-12-13 17:42:21,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 17:42:21,788 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:42:21,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:42:21,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:42:21,789 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:42:21,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:42:21,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1565230291, now seen corresponding path program 1 times [2022-12-13 17:42:21,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:42:21,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105626861] [2022-12-13 17:42:21,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:42:21,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:42:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:42:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:42:21,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:42:21,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105626861] [2022-12-13 17:42:21,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105626861] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:42:21,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819841262] [2022-12-13 17:42:21,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:42:21,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:42:21,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:42:21,852 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:42:21,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:42:21,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:42:21,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 17:42:21,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:42:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:42:21,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:42:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:42:21,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819841262] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:42:21,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:42:21,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-12-13 17:42:21,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537538654] [2022-12-13 17:42:21,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:42:21,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:42:21,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:42:21,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:42:21,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:42:21,966 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:22,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:42:22,016 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-12-13 17:42:22,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:42:22,017 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-13 17:42:22,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:42:22,018 INFO L225 Difference]: With dead ends: 45 [2022-12-13 17:42:22,018 INFO L226 Difference]: Without dead ends: 31 [2022-12-13 17:42:22,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:42:22,020 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:42:22,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 56 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:42:22,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-13 17:42:22,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2022-12-13 17:42:22,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:22,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-12-13 17:42:22,024 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2022-12-13 17:42:22,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:42:22,024 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-12-13 17:42:22,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:22,024 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-12-13 17:42:22,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 17:42:22,025 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:42:22,025 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:42:22,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:42:22,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:42:22,233 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:42:22,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:42:22,235 INFO L85 PathProgramCache]: Analyzing trace with hash -7962739, now seen corresponding path program 2 times [2022-12-13 17:42:22,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:42:22,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119846820] [2022-12-13 17:42:22,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:42:22,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:42:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:42:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 17:42:22,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:42:22,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119846820] [2022-12-13 17:42:22,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119846820] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:42:22,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:42:22,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:42:22,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309379481] [2022-12-13 17:42:22,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:42:22,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:42:22,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:42:22,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:42:22,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:42:22,432 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:22,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:42:22,455 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-12-13 17:42:22,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:42:22,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-13 17:42:22,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:42:22,456 INFO L225 Difference]: With dead ends: 38 [2022-12-13 17:42:22,456 INFO L226 Difference]: Without dead ends: 31 [2022-12-13 17:42:22,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:42:22,457 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:42:22,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 30 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:42:22,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-13 17:42:22,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2022-12-13 17:42:22,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 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) [2022-12-13 17:42:22,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-12-13 17:42:22,462 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2022-12-13 17:42:22,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:42:22,462 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-12-13 17:42:22,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:22,463 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-12-13 17:42:22,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 17:42:22,463 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:42:22,463 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:42:22,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 17:42:22,463 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:42:22,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:42:22,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1148715813, now seen corresponding path program 1 times [2022-12-13 17:42:22,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:42:22,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385442134] [2022-12-13 17:42:22,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:42:22,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:42:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:42:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 17:42:22,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:42:22,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385442134] [2022-12-13 17:42:22,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385442134] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:42:22,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:42:22,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:42:22,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283749238] [2022-12-13 17:42:22,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:42:22,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:42:22,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:42:22,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:42:22,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:42:22,561 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:22,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:42:22,604 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-12-13 17:42:22,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:42:22,604 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-13 17:42:22,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:42:22,605 INFO L225 Difference]: With dead ends: 47 [2022-12-13 17:42:22,605 INFO L226 Difference]: Without dead ends: 34 [2022-12-13 17:42:22,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:42:22,607 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:42:22,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 40 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:42:22,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-13 17:42:22,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2022-12-13 17:42:22,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2022-12-13 17:42:22,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-12-13 17:42:22,614 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2022-12-13 17:42:22,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:42:22,614 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-12-13 17:42:22,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:22,615 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-12-13 17:42:22,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 17:42:22,615 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:42:22,615 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:42:22,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 17:42:22,616 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:42:22,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:42:22,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1025080129, now seen corresponding path program 1 times [2022-12-13 17:42:22,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:42:22,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935971245] [2022-12-13 17:42:22,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:42:22,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:42:22,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:42:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-13 17:42:22,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:42:22,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935971245] [2022-12-13 17:42:22,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935971245] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:42:22,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275843986] [2022-12-13 17:42:22,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:42:22,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:42:22,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:42:22,692 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:42:22,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 17:42:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:42:22,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:42:22,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:42:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:42:22,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:42:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:42:22,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275843986] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:42:22,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:42:22,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2022-12-13 17:42:22,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216120721] [2022-12-13 17:42:22,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:42:22,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 17:42:22,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:42:22,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 17:42:22,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:42:22,831 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2022-12-13 17:42:22,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:42:22,941 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-12-13 17:42:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 17:42:22,941 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 24 [2022-12-13 17:42:22,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:42:22,942 INFO L225 Difference]: With dead ends: 80 [2022-12-13 17:42:22,942 INFO L226 Difference]: Without dead ends: 64 [2022-12-13 17:42:22,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:42:22,944 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 60 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:42:22,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 109 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:42:22,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-13 17:42:22,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 35. [2022-12-13 17:42:22,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:22,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-12-13 17:42:22,951 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 24 [2022-12-13 17:42:22,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:42:22,951 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-12-13 17:42:22,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2022-12-13 17:42:22,952 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-12-13 17:42:22,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 17:42:22,952 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:42:22,952 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:42:22,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 17:42:23,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:42:23,154 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:42:23,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:42:23,156 INFO L85 PathProgramCache]: Analyzing trace with hash -2070168231, now seen corresponding path program 2 times [2022-12-13 17:42:23,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:42:23,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146813905] [2022-12-13 17:42:23,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:42:23,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:42:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:42:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-13 17:42:23,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:42:23,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146813905] [2022-12-13 17:42:23,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146813905] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:42:23,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560216779] [2022-12-13 17:42:23,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:42:23,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:42:23,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:42:23,350 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:42:23,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 17:42:23,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:42:23,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:42:23,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 17:42:23,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:42:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 17:42:23,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:42:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 17:42:23,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560216779] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:42:23,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:42:23,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-12-13 17:42:23,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923033425] [2022-12-13 17:42:23,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:42:23,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 17:42:23,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:42:23,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 17:42:23,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:42:23,528 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:23,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:42:23,687 INFO L93 Difference]: Finished difference Result 82 states and 110 transitions. [2022-12-13 17:42:23,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 17:42:23,687 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-12-13 17:42:23,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:42:23,688 INFO L225 Difference]: With dead ends: 82 [2022-12-13 17:42:23,688 INFO L226 Difference]: Without dead ends: 66 [2022-12-13 17:42:23,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2022-12-13 17:42:23,689 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 172 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:42:23,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 76 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:42:23,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-13 17:42:23,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2022-12-13 17:42:23,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.25) internal successors, (75), 60 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:23,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2022-12-13 17:42:23,699 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 30 [2022-12-13 17:42:23,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:42:23,699 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2022-12-13 17:42:23,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:23,699 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2022-12-13 17:42:23,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-13 17:42:23,700 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:42:23,700 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:42:23,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 17:42:23,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:42:23,901 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:42:23,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:42:23,902 INFO L85 PathProgramCache]: Analyzing trace with hash 271285953, now seen corresponding path program 3 times [2022-12-13 17:42:23,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:42:23,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540834463] [2022-12-13 17:42:23,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:42:23,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:42:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:42:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-13 17:42:24,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:42:24,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540834463] [2022-12-13 17:42:24,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540834463] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:42:24,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214822424] [2022-12-13 17:42:24,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:42:24,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:42:24,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:42:24,045 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:42:24,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 17:42:24,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 17:42:24,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:42:24,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 17:42:24,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:42:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 64 proven. 3 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-12-13 17:42:24,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:42:24,217 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 63 proven. 4 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-12-13 17:42:24,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214822424] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:42:24,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:42:24,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 12 [2022-12-13 17:42:24,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663338202] [2022-12-13 17:42:24,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:42:24,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 17:42:24,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:42:24,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 17:42:24,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:42:24,219 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:24,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:42:24,384 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2022-12-13 17:42:24,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 17:42:24,384 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-12-13 17:42:24,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:42:24,385 INFO L225 Difference]: With dead ends: 79 [2022-12-13 17:42:24,385 INFO L226 Difference]: Without dead ends: 72 [2022-12-13 17:42:24,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=222, Invalid=378, Unknown=0, NotChecked=0, Total=600 [2022-12-13 17:42:24,386 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 94 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:42:24,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 56 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:42:24,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-13 17:42:24,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-12-13 17:42:24,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.267605633802817) internal successors, (90), 71 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:24,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2022-12-13 17:42:24,393 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 58 [2022-12-13 17:42:24,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:42:24,399 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2022-12-13 17:42:24,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:24,399 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2022-12-13 17:42:24,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-13 17:42:24,400 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:42:24,400 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:42:24,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 17:42:24,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:42:24,601 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:42:24,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:42:24,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1550484977, now seen corresponding path program 4 times [2022-12-13 17:42:24,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:42:24,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844357220] [2022-12-13 17:42:24,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:42:24,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:42:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:42:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 33 proven. 123 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-12-13 17:42:24,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:42:24,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844357220] [2022-12-13 17:42:24,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844357220] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:42:24,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457103596] [2022-12-13 17:42:24,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:42:24,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:42:24,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:42:24,744 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:42:24,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 17:42:24,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:42:24,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:42:24,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 17:42:24,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:42:24,901 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 48 proven. 130 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 17:42:24,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:42:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 48 proven. 130 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 17:42:24,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457103596] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:42:24,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:42:24,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 13 [2022-12-13 17:42:24,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77341005] [2022-12-13 17:42:24,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:42:24,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 17:42:24,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:42:24,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 17:42:24,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:42:24,992 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:25,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:42:25,297 INFO L93 Difference]: Finished difference Result 137 states and 179 transitions. [2022-12-13 17:42:25,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 17:42:25,297 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 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 66 [2022-12-13 17:42:25,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:42:25,298 INFO L225 Difference]: With dead ends: 137 [2022-12-13 17:42:25,298 INFO L226 Difference]: Without dead ends: 113 [2022-12-13 17:42:25,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 117 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=386, Invalid=804, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 17:42:25,300 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 96 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:42:25,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 111 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:42:25,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-12-13 17:42:25,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2022-12-13 17:42:25,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.2980769230769231) internal successors, (135), 104 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:25,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 135 transitions. [2022-12-13 17:42:25,321 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 135 transitions. Word has length 66 [2022-12-13 17:42:25,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:42:25,321 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 135 transitions. [2022-12-13 17:42:25,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:25,321 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 135 transitions. [2022-12-13 17:42:25,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-13 17:42:25,323 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:42:25,323 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:42:25,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 17:42:25,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:42:25,524 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:42:25,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:42:25,526 INFO L85 PathProgramCache]: Analyzing trace with hash 96032675, now seen corresponding path program 5 times [2022-12-13 17:42:25,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:42:25,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819222761] [2022-12-13 17:42:25,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:42:25,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:42:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:42:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-12-13 17:42:26,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:42:26,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819222761] [2022-12-13 17:42:26,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819222761] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:42:26,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109639724] [2022-12-13 17:42:26,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:42:26,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:42:26,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:42:26,156 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:42:26,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 17:42:26,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-12-13 17:42:26,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:42:26,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 17:42:26,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:42:26,534 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:42:26,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 44 [2022-12-13 17:42:26,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:42:26,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 17 [2022-12-13 17:42:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 158 proven. 43 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-13 17:42:26,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:42:27,853 INFO L350 Elim1Store]: Elim1 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 139 treesize of output 125 [2022-12-13 17:42:27,916 INFO L321 Elim1Store]: treesize reduction 5, result has 95.9 percent of original size [2022-12-13 17:42:27,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 233 treesize of output 274 [2022-12-13 17:42:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 163 proven. 28 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-13 17:42:28,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109639724] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:42:28,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:42:28,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 20, 18] total 42 [2022-12-13 17:42:28,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32599849] [2022-12-13 17:42:28,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:42:28,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 17:42:28,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:42:28,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 17:42:28,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1560, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 17:42:28,940 INFO L87 Difference]: Start difference. First operand 105 states and 135 transitions. Second operand has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:50,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:42:57,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:42:58,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:42:58,385 INFO L93 Difference]: Finished difference Result 511 states and 684 transitions. [2022-12-13 17:42:58,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-12-13 17:42:58,386 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 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 69 [2022-12-13 17:42:58,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:42:58,388 INFO L225 Difference]: With dead ends: 511 [2022-12-13 17:42:58,388 INFO L226 Difference]: Without dead ends: 423 [2022-12-13 17:42:58,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12008 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=3866, Invalid=32806, Unknown=0, NotChecked=0, Total=36672 [2022-12-13 17:42:58,394 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 436 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 138 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-12-13 17:42:58,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 252 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1283 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2022-12-13 17:42:58,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-12-13 17:42:58,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 269. [2022-12-13 17:42:58,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.3507462686567164) internal successors, (362), 268 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:58,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 362 transitions. [2022-12-13 17:42:58,440 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 362 transitions. Word has length 69 [2022-12-13 17:42:58,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:42:58,440 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 362 transitions. [2022-12-13 17:42:58,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:42:58,441 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 362 transitions. [2022-12-13 17:42:58,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-13 17:42:58,442 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:42:58,442 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:42:58,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 17:42:58,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 17:42:58,644 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:42:58,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:42:58,646 INFO L85 PathProgramCache]: Analyzing trace with hash 962635175, now seen corresponding path program 1 times [2022-12-13 17:42:58,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:42:58,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267679436] [2022-12-13 17:42:58,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:42:58,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:42:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:43:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 115 proven. 101 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-13 17:43:00,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:43:00,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267679436] [2022-12-13 17:43:00,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267679436] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:43:00,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968978894] [2022-12-13 17:43:00,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:43:00,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:43:00,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:43:00,341 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:43:00,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 17:43:00,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:43:00,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-13 17:43:00,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:43:00,986 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:43:00,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 44 [2022-12-13 17:43:01,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:43:01,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:43:01,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 17:43:01,227 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:43:01,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 53 [2022-12-13 17:43:01,374 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:43:01,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2022-12-13 17:43:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 55 proven. 190 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 17:43:01,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:43:04,297 INFO L350 Elim1Store]: Elim1 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 86 treesize of output 76 [2022-12-13 17:43:04,348 INFO L321 Elim1Store]: treesize reduction 5, result has 94.6 percent of original size [2022-12-13 17:43:04,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 134 treesize of output 175 [2022-12-13 17:43:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 148 proven. 53 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-13 17:43:04,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968978894] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:43:04,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:43:04,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25, 16] total 60 [2022-12-13 17:43:04,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761183563] [2022-12-13 17:43:04,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:43:04,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-12-13 17:43:04,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:43:04,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-12-13 17:43:04,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=3293, Unknown=1, NotChecked=0, Total=3540 [2022-12-13 17:43:04,621 INFO L87 Difference]: Start difference. First operand 269 states and 362 transitions. Second operand has 60 states, 60 states have (on average 2.4166666666666665) internal successors, (145), 60 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:43:22,489 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse8 (* |c_ULTIMATE.start_SelectionSort_~lh~0#1| 4))) (let ((.cse4 (select |c_#memory_int| |c_~#array~0.base|)) (.cse5 (+ .cse8 |c_~#array~0.offset|)) (.cse9 (* |c_ULTIMATE.start_SelectionSort_~rh~0#1| 4)) (.cse10 (* |c_ULTIMATE.start_SelectionSort_~i~0#1| 4))) (let ((.cse6 (+ |c_~#array~0.offset| .cse10)) (.cse2 (+ .cse8 |c_~#array~0.offset| 4)) (.cse3 (+ .cse8 |c_~#array~0.offset| 12)) (.cse7 (+ .cse9 |c_~#array~0.offset|)) (.cse0 (select .cse4 .cse5))) (and (= |c_~#array~0.offset| 0) (forall ((v_ArrVal_305 Int) (v_ArrVal_304 Int)) (or (< v_ArrVal_304 .cse0) (let ((.cse1 (store (store .cse4 .cse5 v_ArrVal_305) .cse6 v_ArrVal_304))) (< (select .cse1 .cse2) (+ (select .cse1 .cse3) 1))))) (< (select .cse4 .cse7) (+ (select .cse4 .cse6) 1)) (or (and (= .cse8 .cse9) (= (+ .cse8 4) .cse10)) (= .cse9 .cse10)) (forall ((v_ArrVal_305 Int) (v_ArrVal_304 Int)) (or (let ((.cse11 (store (store .cse4 .cse5 v_ArrVal_305) .cse7 v_ArrVal_304))) (< (select .cse11 .cse2) (+ (select .cse11 .cse3) 1))) (< v_ArrVal_304 .cse0))))))) is different from false [2022-12-13 17:43:24,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:44:01,021 WARN L233 SmtUtils]: Spent 36.23s on a formula simplification. DAG size of input: 82 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:44:03,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:44:05,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:44:07,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:44:22,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:44:24,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:44:26,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:44:28,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:44:30,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:44:32,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:44:34,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:44:36,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:44:38,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:44:40,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:44:49,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:44:52,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:44:59,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:45:01,318 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse9 (* |c_ULTIMATE.start_SelectionSort_~lh~0#1| 4))) (let ((.cse6 (+ .cse9 |c_~#array~0.offset|)) (.cse10 (* |c_ULTIMATE.start_SelectionSort_~rh~0#1| 4)) (.cse11 (* |c_ULTIMATE.start_SelectionSort_~i~0#1| 4)) (.cse0 (select |c_#memory_int| |c_~#array~0.base|))) (let ((.cse2 (+ (select .cse0 (+ .cse9 |c_~#array~0.offset| 8)) 1)) (.cse7 (+ |c_~#array~0.offset| .cse11)) (.cse1 (+ .cse9 |c_~#array~0.offset| 4)) (.cse5 (+ .cse9 |c_~#array~0.offset| 12)) (.cse8 (+ .cse10 |c_~#array~0.offset|)) (.cse3 (select .cse0 .cse6))) (and (< (select .cse0 .cse1) .cse2) (< .cse3 .cse2) (forall ((v_ArrVal_305 Int) (v_ArrVal_304 Int)) (or (< v_ArrVal_304 .cse3) (let ((.cse4 (store (store .cse0 .cse6 v_ArrVal_305) .cse7 v_ArrVal_304))) (< (select .cse4 .cse1) (+ (select .cse4 .cse5) 1))))) (< (select .cse0 .cse8) (+ (select .cse0 .cse7) 1)) (or (and (= .cse9 .cse10) (= (+ .cse9 4) .cse11)) (= .cse10 .cse11)) (forall ((v_ArrVal_305 Int) (v_ArrVal_304 Int)) (or (let ((.cse12 (store (store .cse0 .cse6 v_ArrVal_305) .cse8 v_ArrVal_304))) (< (select .cse12 .cse1) (+ (select .cse12 .cse5) 1))) (< v_ArrVal_304 .cse3))))))) is different from false [2022-12-13 17:45:03,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:45:05,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:45:07,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:45:09,705 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse8 (* |c_ULTIMATE.start_SelectionSort_~lh~0#1| 4))) (let ((.cse4 (select |c_#memory_int| |c_~#array~0.base|)) (.cse5 (+ .cse8 |c_~#array~0.offset|)) (.cse9 (* |c_ULTIMATE.start_SelectionSort_~rh~0#1| 4)) (.cse10 (* |c_ULTIMATE.start_SelectionSort_~i~0#1| 4))) (let ((.cse6 (+ |c_~#array~0.offset| .cse10)) (.cse2 (+ .cse8 |c_~#array~0.offset| 4)) (.cse3 (+ .cse8 |c_~#array~0.offset| 12)) (.cse7 (+ .cse9 |c_~#array~0.offset|)) (.cse0 (select .cse4 .cse5))) (and (forall ((v_ArrVal_305 Int) (v_ArrVal_304 Int)) (or (< v_ArrVal_304 .cse0) (let ((.cse1 (store (store .cse4 .cse5 v_ArrVal_305) .cse6 v_ArrVal_304))) (< (select .cse1 .cse2) (+ (select .cse1 .cse3) 1))))) (< (select .cse4 .cse7) (+ (select .cse4 .cse6) 1)) (or (and (= .cse8 .cse9) (= (+ .cse8 4) .cse10)) (= .cse9 .cse10)) (forall ((v_ArrVal_305 Int) (v_ArrVal_304 Int)) (or (let ((.cse11 (store (store .cse4 .cse5 v_ArrVal_305) .cse7 v_ArrVal_304))) (< (select .cse11 .cse2) (+ (select .cse11 .cse3) 1))) (< v_ArrVal_304 .cse0))))))) is different from false [2022-12-13 17:45:09,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:09,871 INFO L93 Difference]: Finished difference Result 988 states and 1347 transitions. [2022-12-13 17:45:09,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-12-13 17:45:09,871 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.4166666666666665) internal successors, (145), 60 states have internal predecessors, (145), 0 states have call successors, (0), 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 69 [2022-12-13 17:45:09,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:09,873 INFO L225 Difference]: With dead ends: 988 [2022-12-13 17:45:09,873 INFO L226 Difference]: Without dead ends: 771 [2022-12-13 17:45:09,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 7348 ImplicationChecksByTransitivity, 86.3s TimeCoverageRelationStatistics Valid=1498, Invalid=21454, Unknown=12, NotChecked=906, Total=23870 [2022-12-13 17:45:09,877 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 466 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 2716 mSolverCounterSat, 67 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 2886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2716 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 42.7s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:09,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 604 Invalid, 2886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2716 Invalid, 20 Unknown, 83 Unchecked, 42.7s Time] [2022-12-13 17:45:09,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-12-13 17:45:09,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 390. [2022-12-13 17:45:09,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.3419023136246786) internal successors, (522), 389 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:09,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 522 transitions. [2022-12-13 17:45:09,934 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 522 transitions. Word has length 69 [2022-12-13 17:45:09,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:09,934 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 522 transitions. [2022-12-13 17:45:09,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.4166666666666665) internal successors, (145), 60 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:09,934 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 522 transitions. [2022-12-13 17:45:09,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-13 17:45:09,935 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:09,935 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:09,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 17:45:10,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 17:45:10,137 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:10,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:10,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1415361629, now seen corresponding path program 2 times [2022-12-13 17:45:10,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:10,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875064197] [2022-12-13 17:45:10,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:10,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-12-13 17:45:11,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:11,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875064197] [2022-12-13 17:45:11,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875064197] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:11,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988906219] [2022-12-13 17:45:11,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:45:11,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:11,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:11,192 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:11,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 17:45:11,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:45:11,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:11,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 17:45:11,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:11,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:45:11,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:45:11,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:45:11,592 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:45:11,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 52 [2022-12-13 17:45:11,726 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:45:11,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2022-12-13 17:45:11,744 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 121 proven. 47 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-12-13 17:45:11,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:23,346 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_365 Int) (v_ArrVal_364 Int) (|v_ULTIMATE.start_SelectionSort_~rh~0#1_58| Int)) (or (< |v_ULTIMATE.start_SelectionSort_~rh~0#1_58| (+ |c_ULTIMATE.start_SelectionSort_~i~0#1| 1)) (let ((.cse1 (* |c_ULTIMATE.start_SelectionSort_~lh~0#1| 4))) (let ((.cse0 (store (store (select |c_#memory_int| |c_~#array~0.base|) (+ .cse1 |c_~#array~0.offset|) v_ArrVal_365) (+ (* |v_ULTIMATE.start_SelectionSort_~rh~0#1_58| 4) |c_~#array~0.offset|) v_ArrVal_364))) (< (select .cse0 (+ .cse1 |c_~#array~0.offset| 12)) (select .cse0 (+ .cse1 |c_~#array~0.offset| 8))))))) is different from false [2022-12-13 17:45:25,441 INFO L350 Elim1Store]: Elim1 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 71 treesize of output 63 [2022-12-13 17:45:25,485 INFO L321 Elim1Store]: treesize reduction 5, result has 92.8 percent of original size [2022-12-13 17:45:25,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 131 [2022-12-13 17:45:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 123 proven. 41 refuted. 0 times theorem prover too weak. 87 trivial. 4 not checked. [2022-12-13 17:45:25,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988906219] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:25,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:25,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 16] total 40 [2022-12-13 17:45:25,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644292436] [2022-12-13 17:45:25,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:25,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 17:45:25,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:25,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 17:45:25,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1330, Unknown=6, NotChecked=74, Total=1560 [2022-12-13 17:45:25,698 INFO L87 Difference]: Start difference. First operand 390 states and 522 transitions. Second operand has 40 states, 40 states have (on average 2.05) internal successors, (82), 40 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:28,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:45:36,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:45:38,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:45:42,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:45:45,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:45:47,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:45:49,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:45:51,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:45:53,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:45:55,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:45:56,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:45:58,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:00,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:02,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:04,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:07,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:09,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:12,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:19,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:21,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:23,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:25,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:26,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:29,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:31,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:33,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:35,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:37,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:44,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:46,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:48,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:50,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:52,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:54,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:59,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:47:01,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:47:03,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:47:05,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:47:07,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:47:09,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:47:11,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:47:13,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:47:15,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:47:17,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:47:17,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:47:17,589 INFO L93 Difference]: Finished difference Result 915 states and 1228 transitions. [2022-12-13 17:47:17,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 17:47:17,590 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 40 states have internal predecessors, (82), 0 states have call successors, (0), 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 69 [2022-12-13 17:47:17,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:47:17,591 INFO L225 Difference]: With dead ends: 915 [2022-12-13 17:47:17,591 INFO L226 Difference]: Without dead ends: 545 [2022-12-13 17:47:17,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=482, Invalid=4484, Unknown=8, NotChecked=138, Total=5112 [2022-12-13 17:47:17,595 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 143 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 16 mSolverCounterUnsat, 42 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 42 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 91.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:47:17,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 282 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1305 Invalid, 42 Unknown, 82 Unchecked, 91.2s Time] [2022-12-13 17:47:17,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-12-13 17:47:17,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 439. [2022-12-13 17:47:17,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.3538812785388128) internal successors, (593), 438 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:17,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 593 transitions. [2022-12-13 17:47:17,656 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 593 transitions. Word has length 69 [2022-12-13 17:47:17,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:47:17,656 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 593 transitions. [2022-12-13 17:47:17,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 40 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:17,657 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 593 transitions. [2022-12-13 17:47:17,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-13 17:47:17,658 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:47:17,658 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:47:17,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 17:47:17,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:17,860 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:47:17,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:47:17,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1896441887, now seen corresponding path program 3 times [2022-12-13 17:47:17,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:47:17,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392195581] [2022-12-13 17:47:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:47:17,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:47:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:47:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-12-13 17:47:18,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:47:18,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392195581] [2022-12-13 17:47:18,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392195581] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:47:18,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355962906] [2022-12-13 17:47:18,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:47:18,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:18,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:47:18,476 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:47:18,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 17:47:18,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-12-13 17:47:18,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:47:18,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 17:47:18,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:47:18,723 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 17:47:18,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 17:47:18,752 INFO L350 Elim1Store]: Elim1 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 25 [2022-12-13 17:47:18,778 INFO L350 Elim1Store]: Elim1 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 25 [2022-12-13 17:47:18,796 INFO L350 Elim1Store]: Elim1 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 25 [2022-12-13 17:47:18,825 INFO L350 Elim1Store]: Elim1 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 25 [2022-12-13 17:47:18,844 INFO L350 Elim1Store]: Elim1 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 25 [2022-12-13 17:47:19,097 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:47:19,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 36 [2022-12-13 17:47:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 78 proven. 16 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-12-13 17:47:19,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:47:19,385 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_424 (Array Int Int)) (|ULTIMATE.start_SelectionSort_~rh~0#1| Int)) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| v_ArrVal_424) |c_~#array~0.base|))) (let ((.cse0 (select .cse1 (+ |c_~#array~0.offset| (* |ULTIMATE.start_SelectionSort_~rh~0#1| 4))))) (or (< .cse0 (+ (select .cse1 (+ |c_~#array~0.offset| 12)) 1)) (< (select .cse1 (+ |c_~#array~0.offset| 8)) .cse0))))) is different from false [2022-12-13 17:47:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 161 trivial. 9 not checked. [2022-12-13 17:47:19,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355962906] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:47:19,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:47:19,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 28 [2022-12-13 17:47:19,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327433099] [2022-12-13 17:47:19,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:47:19,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 17:47:19,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:47:19,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 17:47:19,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=660, Unknown=1, NotChecked=52, Total=812 [2022-12-13 17:47:19,485 INFO L87 Difference]: Start difference. First operand 439 states and 593 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:26,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:47:28,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:47:28,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:47:28,870 INFO L93 Difference]: Finished difference Result 799 states and 1088 transitions. [2022-12-13 17:47:28,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 17:47:28,870 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-12-13 17:47:28,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:47:28,871 INFO L225 Difference]: With dead ends: 799 [2022-12-13 17:47:28,871 INFO L226 Difference]: Without dead ends: 385 [2022-12-13 17:47:28,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=340, Invalid=1385, Unknown=1, NotChecked=80, Total=1806 [2022-12-13 17:47:28,872 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 147 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-12-13 17:47:28,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 168 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 195 Invalid, 2 Unknown, 33 Unchecked, 4.3s Time] [2022-12-13 17:47:28,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-12-13 17:47:28,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 378. [2022-12-13 17:47:28,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.363395225464191) internal successors, (514), 377 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:28,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 514 transitions. [2022-12-13 17:47:28,929 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 514 transitions. Word has length 69 [2022-12-13 17:47:28,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:47:28,929 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 514 transitions. [2022-12-13 17:47:28,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:28,929 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 514 transitions. [2022-12-13 17:47:28,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-13 17:47:28,930 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:47:28,930 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:47:28,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 17:47:29,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 17:47:29,130 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:47:29,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:47:29,131 INFO L85 PathProgramCache]: Analyzing trace with hash -882650715, now seen corresponding path program 4 times [2022-12-13 17:47:29,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:47:29,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386488844] [2022-12-13 17:47:29,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:47:29,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:47:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:47:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 94 proven. 24 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-12-13 17:47:29,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:47:29,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386488844] [2022-12-13 17:47:29,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386488844] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:47:29,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112948643] [2022-12-13 17:47:29,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:47:29,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:29,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:47:29,643 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:47:29,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 17:47:29,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:47:29,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:47:29,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 17:47:29,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:47:29,773 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 17:47:29,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 17:47:29,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 17:47:30,059 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2022-12-13 17:47:30,178 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2022-12-13 17:47:30,263 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2022-12-13 17:47:30,330 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2022-12-13 17:47:30,375 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2022-12-13 17:47:30,480 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-13 17:47:30,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2022-12-13 17:47:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-12-13 17:47:30,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:47:30,574 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_485 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_485) |c_ULTIMATE.start_main_~#array~1#1.base|) |c_ULTIMATE.start_main_~#array~1#1.offset|) 0)) is different from false [2022-12-13 17:47:30,731 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:47:30,731 INFO L350 Elim1Store]: Elim1 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 22 treesize of output 23 [2022-12-13 17:47:30,738 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 17:47:30,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 26 [2022-12-13 17:47:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 237 trivial. 9 not checked. [2022-12-13 17:47:30,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112948643] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:47:30,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:47:30,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 28 [2022-12-13 17:47:30,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563916833] [2022-12-13 17:47:30,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:47:30,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 17:47:30,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:47:30,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 17:47:30,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=672, Unknown=1, NotChecked=52, Total=812 [2022-12-13 17:47:30,794 INFO L87 Difference]: Start difference. First operand 378 states and 514 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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) [2022-12-13 17:47:32,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:47:32,609 INFO L93 Difference]: Finished difference Result 738 states and 1011 transitions. [2022-12-13 17:47:32,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 17:47:32,610 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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) Word has length 69 [2022-12-13 17:47:32,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:47:32,612 INFO L225 Difference]: With dead ends: 738 [2022-12-13 17:47:32,612 INFO L226 Difference]: Without dead ends: 385 [2022-12-13 17:47:32,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=426, Invalid=1711, Unknown=29, NotChecked=90, Total=2256 [2022-12-13 17:47:32,613 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 214 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 11 mSolverCounterUnsat, 73 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 73 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 17:47:32,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 147 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 277 Invalid, 73 Unknown, 18 Unchecked, 0.5s Time] [2022-12-13 17:47:32,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-12-13 17:47:32,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 381. [2022-12-13 17:47:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 1.3605263157894736) internal successors, (517), 380 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:32,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 517 transitions. [2022-12-13 17:47:32,674 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 517 transitions. Word has length 69 [2022-12-13 17:47:32,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:47:32,675 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 517 transitions. [2022-12-13 17:47:32,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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) [2022-12-13 17:47:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 517 transitions. [2022-12-13 17:47:32,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-13 17:47:32,675 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:47:32,675 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:47:32,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 17:47:32,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 17:47:32,876 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:47:32,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:47:32,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1757098617, now seen corresponding path program 1 times [2022-12-13 17:47:32,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:47:32,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333506738] [2022-12-13 17:47:32,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:47:32,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:47:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:47:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 117 proven. 73 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-12-13 17:47:33,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:47:33,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333506738] [2022-12-13 17:47:33,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333506738] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:47:33,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84572823] [2022-12-13 17:47:33,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:47:33,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:33,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:47:33,747 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:47:33,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 17:47:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:47:33,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-13 17:47:33,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:47:33,878 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 17:47:33,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 17:47:33,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-13 17:47:33,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-13 17:47:34,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-13 17:47:34,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-13 17:47:34,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-13 17:47:34,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:47:34,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 17:47:34,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:47:34,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:47:34,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-12-13 17:47:34,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:47:34,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:47:34,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:47:34,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 17:47:34,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 18 [2022-12-13 17:47:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 117 proven. 86 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-13 17:47:35,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:47:36,290 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_544 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| v_ArrVal_544) |c_~#array~0.base|))) (let ((.cse0 (select .cse2 (+ |c_~#array~0.offset| 12))) (.cse1 (select .cse2 (+ 16 |c_~#array~0.offset|)))) (or (< .cse0 (+ .cse1 1)) (< (select .cse2 (+ |c_~#array~0.offset| 8)) (+ .cse0 1)) (< .cse1 (select .cse2 |c_~#array~0.offset|)))))) is different from false [2022-12-13 17:47:36,360 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~#array~1#1.base_12| Int) (v_ArrVal_544 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |v_ULTIMATE.start_main_~#array~1#1.base_12| v_ArrVal_544) |c_~#array~0.base|))) (let ((.cse1 (select .cse0 (+ |c_~#array~0.offset| 12))) (.cse2 (select .cse0 (+ 16 |c_~#array~0.offset|)))) (or (< (select .cse0 (+ |c_~#array~0.offset| 8)) (+ .cse1 1)) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~#array~1#1.base_12|) 0)) (< .cse1 (+ .cse2 1)) (< .cse2 (select .cse0 |c_~#array~0.offset|)))))) is different from false [2022-12-13 17:47:36,362 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 127 proven. 55 refuted. 0 times theorem prover too weak. 66 trivial. 9 not checked. [2022-12-13 17:47:36,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84572823] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:47:36,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:47:36,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 20] total 58 [2022-12-13 17:47:36,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971246665] [2022-12-13 17:47:36,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:47:36,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-13 17:47:36,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:47:36,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-13 17:47:36,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=2859, Unknown=2, NotChecked=222, Total=3422 [2022-12-13 17:47:36,363 INFO L87 Difference]: Start difference. First operand 381 states and 517 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:42,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:47:42,169 INFO L93 Difference]: Finished difference Result 913 states and 1255 transitions. [2022-12-13 17:47:42,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-13 17:47:42,169 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 states have internal predecessors, (119), 0 states have call successors, (0), 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 73 [2022-12-13 17:47:42,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:47:42,170 INFO L225 Difference]: With dead ends: 913 [2022-12-13 17:47:42,170 INFO L226 Difference]: Without dead ends: 583 [2022-12-13 17:47:42,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2261 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1469, Invalid=8239, Unknown=2, NotChecked=390, Total=10100 [2022-12-13 17:47:42,172 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 559 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:47:42,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 259 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 992 Invalid, 0 Unknown, 105 Unchecked, 1.1s Time] [2022-12-13 17:47:42,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-12-13 17:47:42,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 427. [2022-12-13 17:47:42,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 1.3474178403755868) internal successors, (574), 426 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:42,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 574 transitions. [2022-12-13 17:47:42,247 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 574 transitions. Word has length 73 [2022-12-13 17:47:42,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:47:42,247 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 574 transitions. [2022-12-13 17:47:42,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:42,248 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 574 transitions. [2022-12-13 17:47:42,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-13 17:47:42,248 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:47:42,248 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:47:42,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 17:47:42,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:42,449 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:47:42,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:47:42,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1737329913, now seen corresponding path program 2 times [2022-12-13 17:47:42,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:47:42,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802120302] [2022-12-13 17:47:42,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:47:42,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:47:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:47:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 119 proven. 29 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-12-13 17:47:43,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:47:43,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802120302] [2022-12-13 17:47:43,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802120302] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:47:43,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704483409] [2022-12-13 17:47:43,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:47:43,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:43,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:47:43,272 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:47:43,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 17:47:43,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:47:43,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:47:43,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:47:43,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:47:43,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 24 [2022-12-13 17:47:43,688 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:47:43,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 44 [2022-12-13 17:47:43,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:47:43,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2022-12-13 17:47:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 55 proven. 142 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-13 17:47:43,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:47:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-12-13 17:47:46,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704483409] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:47:46,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:47:46,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 11] total 36 [2022-12-13 17:47:46,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713923426] [2022-12-13 17:47:46,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:47:46,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 17:47:46,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:47:46,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 17:47:46,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1119, Unknown=1, NotChecked=0, Total=1260 [2022-12-13 17:47:46,230 INFO L87 Difference]: Start difference. First operand 427 states and 574 transitions. Second operand has 36 states, 36 states have (on average 2.75) internal successors, (99), 36 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:51,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:47:53,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:48:02,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:48:04,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:48:12,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:48:14,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:48:21,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:48:21,286 INFO L93 Difference]: Finished difference Result 1346 states and 1854 transitions. [2022-12-13 17:48:21,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-12-13 17:48:21,287 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.75) internal successors, (99), 36 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-12-13 17:48:21,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:48:21,289 INFO L225 Difference]: With dead ends: 1346 [2022-12-13 17:48:21,289 INFO L226 Difference]: Without dead ends: 996 [2022-12-13 17:48:21,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3007 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=1049, Invalid=8449, Unknown=8, NotChecked=0, Total=9506 [2022-12-13 17:48:21,290 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 344 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 24 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2022-12-13 17:48:21,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 345 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1106 Invalid, 6 Unknown, 0 Unchecked, 13.4s Time] [2022-12-13 17:48:21,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2022-12-13 17:48:21,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 403. [2022-12-13 17:48:21,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.3507462686567164) internal successors, (543), 402 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:21,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 543 transitions. [2022-12-13 17:48:21,401 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 543 transitions. Word has length 73 [2022-12-13 17:48:21,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:48:21,401 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 543 transitions. [2022-12-13 17:48:21,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.75) internal successors, (99), 36 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:21,402 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 543 transitions. [2022-12-13 17:48:21,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-13 17:48:21,403 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:48:21,403 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:48:21,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 17:48:21,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 17:48:21,604 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:48:21,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:21,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1614104453, now seen corresponding path program 3 times [2022-12-13 17:48:21,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:48:21,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551678166] [2022-12-13 17:48:21,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:48:21,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:48:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-12-13 17:48:22,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:48:22,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551678166] [2022-12-13 17:48:22,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551678166] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:48:22,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512708789] [2022-12-13 17:48:22,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:48:22,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:48:22,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:48:22,311 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:48:22,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 17:48:22,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-13 17:48:22,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:48:22,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 17:48:22,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:48:22,551 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 17:48:22,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 17:48:22,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 17:48:22,702 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-13 17:48:22,702 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 17:48:22,820 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-12-13 17:48:22,883 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-12-13 17:48:22,945 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-12-13 17:48:22,976 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-12-13 17:48:22,994 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-12-13 17:48:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-12-13 17:48:23,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:48:23,186 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_670 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_670) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 4)) 1)) is different from false [2022-12-13 17:48:23,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:48:23,490 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 32 treesize of output 38 [2022-12-13 17:48:23,497 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 17:48:23,497 INFO L350 Elim1Store]: Elim1 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 38 treesize of output 28 [2022-12-13 17:48:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 221 trivial. 9 not checked. [2022-12-13 17:48:23,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512708789] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:48:23,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:48:23,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 15] total 38 [2022-12-13 17:48:23,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885804359] [2022-12-13 17:48:23,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:48:23,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 17:48:23,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:48:23,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 17:48:23,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1144, Unknown=2, NotChecked=72, Total=1482 [2022-12-13 17:48:23,695 INFO L87 Difference]: Start difference. First operand 403 states and 543 transitions. Second operand has 39 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 38 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:25,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:48:25,367 INFO L93 Difference]: Finished difference Result 820 states and 1100 transitions. [2022-12-13 17:48:25,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 17:48:25,367 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 38 states have internal predecessors, (95), 0 states have call successors, (0), 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 73 [2022-12-13 17:48:25,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:48:25,369 INFO L225 Difference]: With dead ends: 820 [2022-12-13 17:48:25,369 INFO L226 Difference]: Without dead ends: 818 [2022-12-13 17:48:25,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=925, Invalid=3499, Unknown=2, NotChecked=130, Total=4556 [2022-12-13 17:48:25,370 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 295 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 17:48:25,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 345 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 388 Invalid, 0 Unknown, 47 Unchecked, 0.3s Time] [2022-12-13 17:48:25,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-12-13 17:48:25,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 407. [2022-12-13 17:48:25,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.3472906403940887) internal successors, (547), 406 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:25,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 547 transitions. [2022-12-13 17:48:25,481 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 547 transitions. Word has length 73 [2022-12-13 17:48:25,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:48:25,482 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 547 transitions. [2022-12-13 17:48:25,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 38 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:25,482 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 547 transitions. [2022-12-13 17:48:25,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-13 17:48:25,483 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:48:25,483 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:48:25,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 17:48:25,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 17:48:25,684 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:48:25,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:25,684 INFO L85 PathProgramCache]: Analyzing trace with hash -613320047, now seen corresponding path program 4 times [2022-12-13 17:48:25,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:48:25,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043072495] [2022-12-13 17:48:25,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:48:25,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:48:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 17:48:26,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:48:26,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043072495] [2022-12-13 17:48:26,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043072495] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:48:26,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394438634] [2022-12-13 17:48:26,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:48:26,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:48:26,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:48:26,845 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:48:26,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 17:48:26,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:48:26,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:48:26,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-13 17:48:26,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:48:27,229 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:48:27,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 42 [2022-12-13 17:48:27,451 INFO L321 Elim1Store]: treesize reduction 122, result has 9.6 percent of original size [2022-12-13 17:48:27,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 42 [2022-12-13 17:48:27,587 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:48:27,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2022-12-13 17:48:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 55 proven. 168 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 17:48:27,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:48:40,150 INFO L350 Elim1Store]: Elim1 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 84 treesize of output 74 [2022-12-13 17:48:40,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:48:40,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 128 treesize of output 174 [2022-12-13 17:48:40,522 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 147 proven. 54 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-12-13 17:48:40,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394438634] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:48:40,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:48:40,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 16] total 52 [2022-12-13 17:48:40,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394817460] [2022-12-13 17:48:40,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:48:40,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-13 17:48:40,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:48:40,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-13 17:48:40,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2483, Unknown=4, NotChecked=0, Total=2652 [2022-12-13 17:48:40,525 INFO L87 Difference]: Start difference. First operand 407 states and 547 transitions. Second operand has 52 states, 52 states have (on average 2.8653846153846154) internal successors, (149), 52 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:52,941 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse10 (* |c_ULTIMATE.start_SelectionSort_~lh~0#1| 4))) (let ((.cse4 (select |c_#memory_int| |c_~#array~0.base|)) (.cse5 (+ .cse10 |c_~#array~0.offset|))) (let ((.cse2 (+ .cse10 |c_~#array~0.offset| 8)) (.cse0 (select .cse4 .cse5)) (.cse3 (+ .cse10 |c_~#array~0.offset| 4)) (.cse6 (+ (* |c_ULTIMATE.start_SelectionSort_~rh~0#1| 4) |c_~#array~0.offset|)) (.cse8 (+ |c_~#array~0.offset| (* |c_ULTIMATE.start_SelectionSort_~i~0#1| 4))) (.cse9 (= 2 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_~#array~0.offset| 8))))) (and (<= |c_~#array~0.offset| 0) (forall ((v_ArrVal_727 Int) (v_ArrVal_726 Int)) (or (< .cse0 v_ArrVal_726) (let ((.cse1 (store (store .cse4 .cse5 v_ArrVal_727) .cse6 v_ArrVal_726))) (< (select .cse1 .cse2) (+ (select .cse1 .cse3) 1))))) (= (select |c_#valid| 3) 1) (forall ((v_ArrVal_727 Int) (v_ArrVal_726 Int)) (or (< .cse0 v_ArrVal_726) (let ((.cse7 (store (store .cse4 .cse5 v_ArrVal_727) .cse8 v_ArrVal_726))) (< (select .cse7 .cse2) (+ (select .cse7 .cse3) 1))))) (< .cse0 (+ (select .cse4 .cse3) 1)) (= |c_~#array~0.base| 3) (or (not (= (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)) 0)) .cse9) (< (select .cse4 .cse6) (+ (select .cse4 .cse8) 1)) (<= |c_ULTIMATE.start_main_~i~1#1| 0) (not (= |c_~#array~0.base| |c_ULTIMATE.start_main_~#array~1#1.base|)) (= |c_ULTIMATE.start_main_~#array~1#1.offset| 0) (<= 0 |c_~#array~0.offset|) .cse9)))) is different from false [2022-12-13 17:49:08,663 WARN L233 SmtUtils]: Spent 6.25s on a formula simplification. DAG size of input: 72 DAG size of output: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:49:17,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:49:24,429 WARN L233 SmtUtils]: Spent 6.59s on a formula simplification. DAG size of input: 93 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:49:33,885 WARN L233 SmtUtils]: Spent 6.16s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:49:57,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:49:59,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:50:01,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:50:03,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:50:05,563 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse10 (* |c_ULTIMATE.start_SelectionSort_~lh~0#1| 4))) (let ((.cse4 (select |c_#memory_int| |c_~#array~0.base|)) (.cse5 (+ .cse10 |c_~#array~0.offset|))) (let ((.cse0 (select .cse4 .cse5)) (.cse2 (+ .cse10 |c_~#array~0.offset| 8)) (.cse3 (+ .cse10 |c_~#array~0.offset| 4)) (.cse6 (+ (* |c_ULTIMATE.start_SelectionSort_~rh~0#1| 4) |c_~#array~0.offset|)) (.cse8 (+ |c_~#array~0.offset| (* |c_ULTIMATE.start_SelectionSort_~i~0#1| 4))) (.cse9 (= 2 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_~#array~0.offset| 8))))) (and (<= |c_~#array~0.offset| 0) (forall ((v_ArrVal_727 Int) (v_ArrVal_726 Int)) (or (< .cse0 v_ArrVal_726) (let ((.cse1 (store (store .cse4 .cse5 v_ArrVal_727) .cse6 v_ArrVal_726))) (< (select .cse1 .cse2) (+ (select .cse1 .cse3) 1))))) (= (select |c_#valid| 3) 1) (forall ((v_ArrVal_727 Int) (v_ArrVal_726 Int)) (or (< .cse0 v_ArrVal_726) (let ((.cse7 (store (store .cse4 .cse5 v_ArrVal_727) .cse8 v_ArrVal_726))) (< (select .cse7 .cse2) (+ (select .cse7 .cse3) 1))))) (= |c_~#array~0.base| 3) (or (not (= (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)) 0)) .cse9) (<= (select .cse4 (+ |c_~#array~0.offset| 12)) (select .cse4 .cse3)) (= 3 |c_ULTIMATE.start_SelectionSort_~lh~0#1|) (< (select .cse4 .cse6) (+ (select .cse4 .cse8) 1)) (<= |c_ULTIMATE.start_main_~i~1#1| 0) (not (= |c_~#array~0.base| |c_ULTIMATE.start_main_~#array~1#1.base|)) (= |c_ULTIMATE.start_main_~#array~1#1.offset| 0) (<= 0 |c_~#array~0.offset|) .cse9)))) is different from false [2022-12-13 17:50:07,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:50:23,442 WARN L233 SmtUtils]: Spent 8.25s on a formula simplification. DAG size of input: 90 DAG size of output: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:50:31,765 WARN L233 SmtUtils]: Spent 8.14s on a formula simplification. DAG size of input: 69 DAG size of output: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:50:33,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:50:33,000 INFO L93 Difference]: Finished difference Result 1328 states and 1814 transitions. [2022-12-13 17:50:33,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-12-13 17:50:33,000 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.8653846153846154) internal successors, (149), 52 states have internal predecessors, (149), 0 states have call successors, (0), 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 77 [2022-12-13 17:50:33,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:50:33,002 INFO L225 Difference]: With dead ends: 1328 [2022-12-13 17:50:33,002 INFO L226 Difference]: Without dead ends: 1132 [2022-12-13 17:50:33,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 9111 ImplicationChecksByTransitivity, 110.6s TimeCoverageRelationStatistics Valid=2067, Invalid=25647, Unknown=16, NotChecked=662, Total=28392 [2022-12-13 17:50:33,004 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 555 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 2130 mSolverCounterSat, 60 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 2198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2130 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2022-12-13 17:50:33,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [555 Valid, 778 Invalid, 2198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2130 Invalid, 6 Unknown, 2 Unchecked, 14.8s Time] [2022-12-13 17:50:33,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2022-12-13 17:50:33,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 501. [2022-12-13 17:50:33,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.332) internal successors, (666), 500 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:33,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 666 transitions. [2022-12-13 17:50:33,145 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 666 transitions. Word has length 77 [2022-12-13 17:50:33,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:50:33,145 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 666 transitions. [2022-12-13 17:50:33,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.8653846153846154) internal successors, (149), 52 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:33,145 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 666 transitions. [2022-12-13 17:50:33,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-13 17:50:33,146 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:50:33,146 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:50:33,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 17:50:33,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 17:50:33,348 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:50:33,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:50:33,349 INFO L85 PathProgramCache]: Analyzing trace with hash -2033195035, now seen corresponding path program 5 times [2022-12-13 17:50:33,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:50:33,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688588722] [2022-12-13 17:50:33,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:50:33,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:50:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:50:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 90 proven. 122 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-12-13 17:50:34,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:50:34,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688588722] [2022-12-13 17:50:34,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688588722] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:50:34,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453719595] [2022-12-13 17:50:34,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:50:34,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:50:34,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:50:34,717 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:50:34,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 17:50:34,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-12-13 17:50:34,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:50:34,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-13 17:50:34,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:50:35,017 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 17:50:35,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 17:50:35,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 17:50:35,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:50:35,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-12-13 17:50:35,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:50:35,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-12-13 17:50:35,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:50:35,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-12-13 17:50:35,454 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-12-13 17:50:35,546 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-12-13 17:50:35,621 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-12-13 17:50:35,675 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-12-13 17:50:35,710 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-12-13 17:50:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-12-13 17:50:36,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:50:38,923 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_792 Int) (v_ArrVal_790 Int) (|v_ULTIMATE.start_main_~i~1#1_98| Int) (v_ArrVal_797 (Array Int Int))) (or (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_98| 1) |c_ULTIMATE.start_main_~i~1#1|)) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)) v_ArrVal_790) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_98| 4)) v_ArrVal_792)) |c_~#array~0.base| v_ArrVal_797) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 12)) 3))) is different from false [2022-12-13 17:50:40,958 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~1#1_99| Int)) (or (forall ((v_ArrVal_792 Int) (v_ArrVal_790 Int) (|v_ULTIMATE.start_main_~i~1#1_98| Int) (v_ArrVal_797 (Array Int Int))) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ (* |v_ULTIMATE.start_main_~i~1#1_99| 4) |c_ULTIMATE.start_main_~#array~1#1.offset|) v_ArrVal_790) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_98| 4)) v_ArrVal_792)) |c_~#array~0.base| v_ArrVal_797) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 12)) 3) (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_98| 1) |v_ULTIMATE.start_main_~i~1#1_99|)))) (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_99| 1) |c_ULTIMATE.start_main_~i~1#1|)))) is different from false [2022-12-13 17:50:42,977 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_792 Int) (v_ArrVal_790 Int) (|v_ULTIMATE.start_main_~i~1#1_99| Int) (|v_ULTIMATE.start_main_~i~1#1_98| Int) (v_ArrVal_797 (Array Int Int)) (v_ArrVal_787 Int)) (or (= 3 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)) v_ArrVal_787) (+ (* |v_ULTIMATE.start_main_~i~1#1_99| 4) |c_ULTIMATE.start_main_~#array~1#1.offset|) v_ArrVal_790) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_98| 4)) v_ArrVal_792)) |c_~#array~0.base| v_ArrVal_797) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 12))) (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_99| 1) |c_ULTIMATE.start_main_~i~1#1|)) (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_98| 1) |v_ULTIMATE.start_main_~i~1#1_99|)))) is different from false [2022-12-13 17:50:44,998 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~1#1_100| Int)) (or (forall ((v_ArrVal_792 Int) (v_ArrVal_790 Int) (|v_ULTIMATE.start_main_~i~1#1_99| Int) (|v_ULTIMATE.start_main_~i~1#1_98| Int) (v_ArrVal_797 (Array Int Int)) (v_ArrVal_787 Int)) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ (* 4 |v_ULTIMATE.start_main_~i~1#1_100|) |c_ULTIMATE.start_main_~#array~1#1.offset|) v_ArrVal_787) (+ (* |v_ULTIMATE.start_main_~i~1#1_99| 4) |c_ULTIMATE.start_main_~#array~1#1.offset|) v_ArrVal_790) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_98| 4)) v_ArrVal_792)) |c_~#array~0.base| v_ArrVal_797) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 12)) 3) (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_99| 1) |v_ULTIMATE.start_main_~i~1#1_100|)) (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_98| 1) |v_ULTIMATE.start_main_~i~1#1_99|)))) (not (<= (+ 1 |v_ULTIMATE.start_main_~i~1#1_100|) |c_ULTIMATE.start_main_~i~1#1|)))) is different from false [2022-12-13 17:50:45,059 INFO L321 Elim1Store]: treesize reduction 203, result has 19.4 percent of original size [2022-12-13 17:50:45,060 INFO L350 Elim1Store]: Elim1 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 4 case distinctions, treesize of input 45 treesize of output 61 [2022-12-13 17:50:45,068 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:50:45,068 INFO L350 Elim1Store]: Elim1 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 38 treesize of output 34 [2022-12-13 17:50:45,075 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 3 [2022-12-13 17:50:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 221 trivial. 16 not checked. [2022-12-13 17:50:45,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453719595] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:50:45,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:50:45,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 18] total 52 [2022-12-13 17:50:45,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671731757] [2022-12-13 17:50:45,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:50:45,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-13 17:50:45,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:50:45,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-13 17:50:45,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2155, Unknown=14, NotChecked=388, Total=2756 [2022-12-13 17:50:45,166 INFO L87 Difference]: Start difference. First operand 501 states and 666 transitions. Second operand has 53 states, 53 states have (on average 2.547169811320755) internal successors, (135), 52 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:53,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:50:53,218 INFO L93 Difference]: Finished difference Result 825 states and 1112 transitions. [2022-12-13 17:50:53,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-13 17:50:53,218 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.547169811320755) internal successors, (135), 52 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-12-13 17:50:53,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:50:53,220 INFO L225 Difference]: With dead ends: 825 [2022-12-13 17:50:53,220 INFO L226 Difference]: Without dead ends: 572 [2022-12-13 17:50:53,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=1208, Invalid=7914, Unknown=14, NotChecked=764, Total=9900 [2022-12-13 17:50:53,221 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 638 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 17:50:53,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 363 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 954 Invalid, 0 Unknown, 356 Unchecked, 0.8s Time] [2022-12-13 17:50:53,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-12-13 17:50:53,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 505. [2022-12-13 17:50:53,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.3293650793650793) internal successors, (670), 504 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:53,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 670 transitions. [2022-12-13 17:50:53,379 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 670 transitions. Word has length 81 [2022-12-13 17:50:53,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:50:53,380 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 670 transitions. [2022-12-13 17:50:53,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.547169811320755) internal successors, (135), 52 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:53,380 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 670 transitions. [2022-12-13 17:50:53,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-13 17:50:53,381 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:50:53,381 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:50:53,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 17:50:53,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 17:50:53,583 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:50:53,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:50:53,584 INFO L85 PathProgramCache]: Analyzing trace with hash 2048079039, now seen corresponding path program 6 times [2022-12-13 17:50:53,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:50:53,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19594011] [2022-12-13 17:50:53,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:50:53,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:50:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:50:54,562 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-12-13 17:50:54,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:50:54,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19594011] [2022-12-13 17:50:54,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19594011] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:50:54,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261252772] [2022-12-13 17:50:54,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:50:54,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:50:54,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:50:54,564 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:50:54,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435da0cd-db1e-4e17-aff3-5f58e854fa5c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 17:50:54,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-12-13 17:50:54,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:50:54,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-13 17:50:54,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:50:55,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:50:55,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 34 [2022-12-13 17:50:55,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:50:55,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:50:55,756 INFO L321 Elim1Store]: treesize reduction 52, result has 61.2 percent of original size [2022-12-13 17:50:55,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 50 treesize of output 99 [2022-12-13 17:50:56,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:50:56,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 136 [2022-12-13 17:50:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 4 proven. 201 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-12-13 17:50:57,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:51:18,947 INFO L350 Elim1Store]: Elim1 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 139 treesize of output 125 [2022-12-13 17:51:19,170 INFO L321 Elim1Store]: treesize reduction 96, result has 61.8 percent of original size [2022-12-13 17:51:19,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 13893 treesize of output 12665