./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/max-2-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/max-2-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R --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 d56d1653edfb1a7b1c72e82d390b1b74d1df9114797a2f1426eb2285f6c4408f --- 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-38b53e6 [2022-11-25 16:41:09,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:41:09,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:41:09,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:41:09,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:41:09,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:41:09,172 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:41:09,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:41:09,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:41:09,183 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:41:09,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:41:09,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:41:09,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:41:09,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:41:09,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:41:09,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:41:09,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:41:09,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:41:09,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:41:09,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:41:09,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:41:09,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:41:09,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:41:09,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:41:09,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:41:09,212 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:41:09,213 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:41:09,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:41:09,214 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:41:09,215 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:41:09,215 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:41:09,216 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:41:09,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:41:09,226 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:41:09,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:41:09,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:41:09,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:41:09,239 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:41:09,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:41:09,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:41:09,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:41:09,245 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 16:41:09,300 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:41:09,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:41:09,301 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:41:09,301 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:41:09,301 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:41:09,302 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:41:09,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:41:09,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:41:09,302 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:41:09,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:41:09,303 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 16:41:09,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:41:09,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 16:41:09,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:41:09,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 16:41:09,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:41:09,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 16:41:09,304 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 16:41:09,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 16:41:09,304 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:41:09,305 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 16:41:09,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:41:09,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:41:09,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:41:09,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:41:09,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:41:09,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:41:09,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 16:41:09,306 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:41:09,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:41:09,306 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:41:09,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 16:41:09,311 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:41:09,311 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:41:09,311 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_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d56d1653edfb1a7b1c72e82d390b1b74d1df9114797a2f1426eb2285f6c4408f [2022-11-25 16:41:09,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:41:09,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:41:09,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:41:09,674 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:41:09,674 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:41:09,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/array-multidimensional/max-2-u.c [2022-11-25 16:41:12,702 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 16:41:12,903 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 16:41:12,904 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/sv-benchmarks/c/array-multidimensional/max-2-u.c [2022-11-25 16:41:12,910 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/data/f352e6cad/af7857f0d2fb4c669eb8dd445f60f752/FLAG574564151 [2022-11-25 16:41:12,932 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/data/f352e6cad/af7857f0d2fb4c669eb8dd445f60f752 [2022-11-25 16:41:12,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 16:41:12,936 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 16:41:12,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 16:41:12,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 16:41:12,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 16:41:12,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:41:12" (1/1) ... [2022-11-25 16:41:12,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d6ed515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:12, skipping insertion in model container [2022-11-25 16:41:12,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:41:12" (1/1) ... [2022-11-25 16:41:12,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 16:41:12,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 16:41:13,119 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_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/sv-benchmarks/c/array-multidimensional/max-2-u.c[319,332] [2022-11-25 16:41:13,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:41:13,149 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 16:41:13,162 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_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/sv-benchmarks/c/array-multidimensional/max-2-u.c[319,332] [2022-11-25 16:41:13,171 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:41:13,186 INFO L208 MainTranslator]: Completed translation [2022-11-25 16:41:13,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:13 WrapperNode [2022-11-25 16:41:13,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 16:41:13,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 16:41:13,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 16:41:13,191 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 16:41:13,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:13" (1/1) ... [2022-11-25 16:41:13,207 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:13" (1/1) ... [2022-11-25 16:41:13,229 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2022-11-25 16:41:13,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 16:41:13,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 16:41:13,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 16:41:13,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 16:41:13,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:13" (1/1) ... [2022-11-25 16:41:13,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:13" (1/1) ... [2022-11-25 16:41:13,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:13" (1/1) ... [2022-11-25 16:41:13,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:13" (1/1) ... [2022-11-25 16:41:13,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:13" (1/1) ... [2022-11-25 16:41:13,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:13" (1/1) ... [2022-11-25 16:41:13,265 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:13" (1/1) ... [2022-11-25 16:41:13,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:13" (1/1) ... [2022-11-25 16:41:13,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 16:41:13,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 16:41:13,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 16:41:13,288 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 16:41:13,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:13" (1/1) ... [2022-11-25 16:41:13,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:41:13,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:41:13,369 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 16:41:13,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 16:41:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 16:41:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 16:41:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 16:41:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 16:41:13,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 16:41:13,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 16:41:13,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 16:41:13,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 16:41:13,501 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 16:41:13,504 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 16:41:13,657 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 16:41:13,668 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 16:41:13,668 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-25 16:41:13,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:41:13 BoogieIcfgContainer [2022-11-25 16:41:13,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 16:41:13,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 16:41:13,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 16:41:13,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 16:41:13,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 04:41:12" (1/3) ... [2022-11-25 16:41:13,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21fb5c98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:41:13, skipping insertion in model container [2022-11-25 16:41:13,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:13" (2/3) ... [2022-11-25 16:41:13,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21fb5c98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:41:13, skipping insertion in model container [2022-11-25 16:41:13,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:41:13" (3/3) ... [2022-11-25 16:41:13,692 INFO L112 eAbstractionObserver]: Analyzing ICFG max-2-u.c [2022-11-25 16:41:13,728 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 16:41:13,743 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 16:41:13,811 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:41:13,818 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;@d06894f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:41:13,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 16:41:13,823 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:13,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 16:41:13,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:13,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:13,832 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:41:13,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:13,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1824316411, now seen corresponding path program 1 times [2022-11-25 16:41:13,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:13,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975138699] [2022-11-25 16:41:13,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:13,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:13,975 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:41:13,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [944091204] [2022-11-25 16:41:13,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:13,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:13,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:41:13,983 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:41:14,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 16:41:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:14,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 16:41:14,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:41:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:41:14,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:41:14,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:14,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975138699] [2022-11-25 16:41:14,222 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:41:14,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944091204] [2022-11-25 16:41:14,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944091204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:41:14,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:41:14,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:41:14,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116672286] [2022-11-25 16:41:14,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:41:14,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:41:14,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:41:14,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:41:14,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:41:14,289 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:14,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:41:14,372 INFO L93 Difference]: Finished difference Result 47 states and 77 transitions. [2022-11-25 16:41:14,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:41:14,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 16:41:14,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:41:14,388 INFO L225 Difference]: With dead ends: 47 [2022-11-25 16:41:14,389 INFO L226 Difference]: Without dead ends: 22 [2022-11-25 16:41:14,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:41:14,400 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:41:14,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 39 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:41:14,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-25 16:41:14,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2022-11-25 16:41:14,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:14,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-11-25 16:41:14,433 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 10 [2022-11-25 16:41:14,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:41:14,433 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-11-25 16:41:14,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:14,434 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2022-11-25 16:41:14,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 16:41:14,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:14,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:14,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 16:41:14,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-25 16:41:14,637 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:41:14,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:14,637 INFO L85 PathProgramCache]: Analyzing trace with hash 435710502, now seen corresponding path program 1 times [2022-11-25 16:41:14,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:14,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671253847] [2022-11-25 16:41:14,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:14,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:14,650 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:41:14,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953748006] [2022-11-25 16:41:14,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:14,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:14,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:41:14,653 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:41:14,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 16:41:14,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:14,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 16:41:14,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:41:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:41:14,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:41:14,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:14,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671253847] [2022-11-25 16:41:14,778 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:41:14,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953748006] [2022-11-25 16:41:14,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953748006] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:41:14,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:41:14,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:41:14,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680566557] [2022-11-25 16:41:14,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:41:14,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:41:14,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:41:14,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:41:14,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:41:14,789 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:14,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:41:14,878 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-11-25 16:41:14,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:41:14,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 16:41:14,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:41:14,880 INFO L225 Difference]: With dead ends: 49 [2022-11-25 16:41:14,880 INFO L226 Difference]: Without dead ends: 32 [2022-11-25 16:41:14,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:41:14,882 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:41:14,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 23 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:41:14,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-25 16:41:14,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-11-25 16:41:14,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 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) [2022-11-25 16:41:14,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-11-25 16:41:14,889 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 13 [2022-11-25 16:41:14,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:41:14,889 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-11-25 16:41:14,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:14,890 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-11-25 16:41:14,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 16:41:14,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:14,891 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:14,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 16:41:15,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:15,096 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:41:15,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:15,097 INFO L85 PathProgramCache]: Analyzing trace with hash -263900950, now seen corresponding path program 1 times [2022-11-25 16:41:15,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:15,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962460339] [2022-11-25 16:41:15,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:15,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:15,118 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:41:15,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315082292] [2022-11-25 16:41:15,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:15,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:15,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:41:15,124 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:41:15,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 16:41:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:15,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 16:41:15,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:41:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:41:15,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:41:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:41:15,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:15,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962460339] [2022-11-25 16:41:15,301 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:41:15,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315082292] [2022-11-25 16:41:15,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315082292] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:41:15,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:41:15,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-25 16:41:15,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143298150] [2022-11-25 16:41:15,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:41:15,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 16:41:15,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:41:15,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 16:41:15,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:41:15,305 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:15,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:41:15,479 INFO L93 Difference]: Finished difference Result 73 states and 98 transitions. [2022-11-25 16:41:15,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 16:41:15,480 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 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 14 [2022-11-25 16:41:15,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:41:15,481 INFO L225 Difference]: With dead ends: 73 [2022-11-25 16:41:15,481 INFO L226 Difference]: Without dead ends: 53 [2022-11-25 16:41:15,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-25 16:41:15,483 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 95 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:41:15,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 41 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:41:15,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-25 16:41:15,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2022-11-25 16:41:15,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:15,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-11-25 16:41:15,508 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 14 [2022-11-25 16:41:15,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:41:15,509 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-11-25 16:41:15,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:15,509 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-11-25 16:41:15,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 16:41:15,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:15,510 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:15,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 16:41:15,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:15,716 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:41:15,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:15,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1437205722, now seen corresponding path program 2 times [2022-11-25 16:41:15,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:15,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308576368] [2022-11-25 16:41:15,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:15,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:15,734 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:41:15,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1047198263] [2022-11-25 16:41:15,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:41:15,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:15,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:41:15,739 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:41:15,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 16:41:15,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 16:41:15,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:41:15,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 16:41:15,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:41:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 16:41:15,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:41:15,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:15,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308576368] [2022-11-25 16:41:15,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:41:15,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047198263] [2022-11-25 16:41:15,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047198263] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:41:15,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:41:15,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:41:15,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976736582] [2022-11-25 16:41:15,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:41:15,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:41:15,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:41:15,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:41:15,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:41:15,880 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:15,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:41:15,965 INFO L93 Difference]: Finished difference Result 100 states and 127 transitions. [2022-11-25 16:41:15,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:41:15,966 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-11-25 16:41:15,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:41:15,968 INFO L225 Difference]: With dead ends: 100 [2022-11-25 16:41:15,969 INFO L226 Difference]: Without dead ends: 82 [2022-11-25 16:41:15,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:41:15,970 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:41:15,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 18 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:41:15,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-25 16:41:15,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 45. [2022-11-25 16:41:15,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:15,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2022-11-25 16:41:15,983 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 17 [2022-11-25 16:41:15,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:41:15,984 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2022-11-25 16:41:15,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:15,984 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2022-11-25 16:41:15,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-25 16:41:15,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:15,985 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:15,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 16:41:16,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-25 16:41:16,190 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:41:16,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:16,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1223950390, now seen corresponding path program 1 times [2022-11-25 16:41:16,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:16,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587247863] [2022-11-25 16:41:16,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:16,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:16,212 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:41:16,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358420875] [2022-11-25 16:41:16,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:16,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:16,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:41:16,216 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:41:16,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 16:41:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:16,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 16:41:16,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:41:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-25 16:41:16,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:41:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-25 16:41:16,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:16,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587247863] [2022-11-25 16:41:16,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:41:16,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358420875] [2022-11-25 16:41:16,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358420875] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:41:16,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:41:16,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-25 16:41:16,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378919500] [2022-11-25 16:41:16,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:41:16,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 16:41:16,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:41:16,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 16:41:16,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-11-25 16:41:16,550 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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) [2022-11-25 16:41:16,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:41:16,889 INFO L93 Difference]: Finished difference Result 148 states and 193 transitions. [2022-11-25 16:41:16,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 16:41:16,890 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-25 16:41:16,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:41:16,896 INFO L225 Difference]: With dead ends: 148 [2022-11-25 16:41:16,897 INFO L226 Difference]: Without dead ends: 106 [2022-11-25 16:41:16,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-11-25 16:41:16,905 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 422 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:41:16,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 55 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 16:41:16,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-25 16:41:16,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2022-11-25 16:41:16,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 86 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:16,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2022-11-25 16:41:16,940 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 32 [2022-11-25 16:41:16,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:41:16,940 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2022-11-25 16:41:16,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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) [2022-11-25 16:41:16,941 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2022-11-25 16:41:16,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-25 16:41:16,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:16,942 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:16,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 16:41:17,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:17,147 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:41:17,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:17,147 INFO L85 PathProgramCache]: Analyzing trace with hash 307149302, now seen corresponding path program 2 times [2022-11-25 16:41:17,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:17,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029834888] [2022-11-25 16:41:17,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:17,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:17,170 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:41:17,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058763761] [2022-11-25 16:41:17,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:41:17,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:17,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:41:17,172 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:41:17,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 16:41:17,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:41:17,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:41:17,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 16:41:17,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:41:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-25 16:41:17,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:41:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-25 16:41:17,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:17,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029834888] [2022-11-25 16:41:17,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:41:17,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058763761] [2022-11-25 16:41:17,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058763761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:41:17,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:41:17,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-11-25 16:41:17,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309447507] [2022-11-25 16:41:17,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:41:17,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 16:41:17,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:41:17,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 16:41:17,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-11-25 16:41:17,841 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:18,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:41:18,499 INFO L93 Difference]: Finished difference Result 298 states and 385 transitions. [2022-11-25 16:41:18,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 16:41:18,499 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-25 16:41:18,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:41:18,501 INFO L225 Difference]: With dead ends: 298 [2022-11-25 16:41:18,501 INFO L226 Difference]: Without dead ends: 214 [2022-11-25 16:41:18,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 16:41:18,503 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 731 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:41:18,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [731 Valid, 123 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 16:41:18,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-25 16:41:18,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 171. [2022-11-25 16:41:18,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.2882352941176471) internal successors, (219), 170 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:18,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 219 transitions. [2022-11-25 16:41:18,531 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 219 transitions. Word has length 56 [2022-11-25 16:41:18,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:41:18,531 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 219 transitions. [2022-11-25 16:41:18,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:18,532 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 219 transitions. [2022-11-25 16:41:18,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-25 16:41:18,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:18,535 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:18,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 16:41:18,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:18,740 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:41:18,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:18,741 INFO L85 PathProgramCache]: Analyzing trace with hash 270851446, now seen corresponding path program 3 times [2022-11-25 16:41:18,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:18,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598304358] [2022-11-25 16:41:18,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:18,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:18,773 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:41:18,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652727817] [2022-11-25 16:41:18,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:41:18,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:18,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:41:18,775 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:41:18,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 16:41:18,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 16:41:18,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:41:18,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 16:41:18,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:41:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2022-11-25 16:41:19,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:41:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2022-11-25 16:41:19,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:19,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598304358] [2022-11-25 16:41:19,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:41:19,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652727817] [2022-11-25 16:41:19,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652727817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:41:19,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:41:19,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-25 16:41:19,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603614665] [2022-11-25 16:41:19,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:41:19,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 16:41:19,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:41:19,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 16:41:19,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:41:19,482 INFO L87 Difference]: Start difference. First operand 171 states and 219 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:19,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:41:19,659 INFO L93 Difference]: Finished difference Result 766 states and 981 transitions. [2022-11-25 16:41:19,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 16:41:19,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2022-11-25 16:41:19,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:41:19,663 INFO L225 Difference]: With dead ends: 766 [2022-11-25 16:41:19,663 INFO L226 Difference]: Without dead ends: 694 [2022-11-25 16:41:19,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-25 16:41:19,665 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 103 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:41:19,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 33 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:41:19,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-11-25 16:41:19,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 378. [2022-11-25 16:41:19,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.312997347480106) internal successors, (495), 377 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:19,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 495 transitions. [2022-11-25 16:41:19,727 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 495 transitions. Word has length 104 [2022-11-25 16:41:19,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:41:19,731 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 495 transitions. [2022-11-25 16:41:19,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:19,731 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 495 transitions. [2022-11-25 16:41:19,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-11-25 16:41:19,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:19,750 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 88, 22, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:19,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-25 16:41:19,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 16:41:19,956 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:41:19,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:19,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1665112998, now seen corresponding path program 4 times [2022-11-25 16:41:19,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:19,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295560529] [2022-11-25 16:41:19,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:19,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:20,026 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:41:20,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [742222987] [2022-11-25 16:41:20,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:41:20,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:20,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:41:20,028 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:41:20,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 16:41:20,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:41:20,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:41:20,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 16:41:20,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:41:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12112 backedges. 651 proven. 9062 refuted. 0 times theorem prover too weak. 2399 trivial. 0 not checked. [2022-11-25 16:41:21,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:41:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12112 backedges. 651 proven. 9062 refuted. 0 times theorem prover too weak. 2399 trivial. 0 not checked. [2022-11-25 16:41:23,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:23,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295560529] [2022-11-25 16:41:23,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:41:23,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742222987] [2022-11-25 16:41:23,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742222987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:41:23,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:41:23,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2022-11-25 16:41:23,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874828459] [2022-11-25 16:41:23,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:41:23,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-25 16:41:23,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:41:23,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-25 16:41:23,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1145, Invalid=2161, Unknown=0, NotChecked=0, Total=3306 [2022-11-25 16:41:23,018 INFO L87 Difference]: Start difference. First operand 378 states and 495 transitions. Second operand has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:27,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:41:27,516 INFO L93 Difference]: Finished difference Result 1965 states and 2419 transitions. [2022-11-25 16:41:27,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-11-25 16:41:27,517 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 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 311 [2022-11-25 16:41:27,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:41:27,524 INFO L225 Difference]: With dead ends: 1965 [2022-11-25 16:41:27,524 INFO L226 Difference]: Without dead ends: 1893 [2022-11-25 16:41:27,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 643 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10069 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=8406, Invalid=18000, Unknown=0, NotChecked=0, Total=26406 [2022-11-25 16:41:27,534 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 851 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1635 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 2125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 1635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-25 16:41:27,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 992 Invalid, 2125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 1635 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-25 16:41:27,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2022-11-25 16:41:27,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 792. [2022-11-25 16:41:27,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 1.3236409608091024) internal successors, (1047), 791 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:27,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1047 transitions. [2022-11-25 16:41:27,618 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1047 transitions. Word has length 311 [2022-11-25 16:41:27,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:41:27,619 INFO L495 AbstractCegarLoop]: Abstraction has 792 states and 1047 transitions. [2022-11-25 16:41:27,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:27,619 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1047 transitions. [2022-11-25 16:41:27,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2022-11-25 16:41:27,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:27,636 INFO L195 NwaCegarLoop]: trace histogram [220, 220, 220, 22, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:27,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 16:41:27,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:27,851 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:41:27,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:27,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1543634522, now seen corresponding path program 5 times [2022-11-25 16:41:27,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:27,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731417771] [2022-11-25 16:41:27,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:27,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:27,976 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:41:27,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828862114] [2022-11-25 16:41:27,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 16:41:27,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:27,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:41:27,983 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:41:28,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 16:51:12,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 184 check-sat command(s) [2022-11-25 16:51:12,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:51:12,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 2094 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 16:51:12,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:51:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 74869 backedges. 34471 proven. 715 refuted. 0 times theorem prover too weak. 39683 trivial. 0 not checked. [2022-11-25 16:51:13,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:51:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 74869 backedges. 31477 proven. 3709 refuted. 0 times theorem prover too weak. 39683 trivial. 0 not checked. [2022-11-25 16:51:14,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:14,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731417771] [2022-11-25 16:51:14,999 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:51:14,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828862114] [2022-11-25 16:51:14,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828862114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:51:15,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:51:15,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-11-25 16:51:15,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295196200] [2022-11-25 16:51:15,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:51:15,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-25 16:51:15,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:15,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-25 16:51:15,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-11-25 16:51:15,008 INFO L87 Difference]: Start difference. First operand 792 states and 1047 transitions. Second operand has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:16,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:51:16,895 INFO L93 Difference]: Finished difference Result 2488 states and 3505 transitions. [2022-11-25 16:51:16,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-25 16:51:16,895 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 states have internal predecessors, (175), 0 states have call successors, (0), 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 725 [2022-11-25 16:51:16,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:51:16,900 INFO L225 Difference]: With dead ends: 2488 [2022-11-25 16:51:16,901 INFO L226 Difference]: Without dead ends: 1699 [2022-11-25 16:51:16,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1471 GetRequests, 1400 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2022-11-25 16:51:16,904 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1009 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1009 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 16:51:16,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1009 Valid, 210 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 16:51:16,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2022-11-25 16:51:17,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1608. [2022-11-25 16:51:17,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 1.3235843186060983) internal successors, (2127), 1607 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:17,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 2127 transitions. [2022-11-25 16:51:17,068 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 2127 transitions. Word has length 725 [2022-11-25 16:51:17,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:51:17,069 INFO L495 AbstractCegarLoop]: Abstraction has 1608 states and 2127 transitions. [2022-11-25 16:51:17,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:17,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 2127 transitions. [2022-11-25 16:51:17,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1470 [2022-11-25 16:51:17,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:51:17,136 INFO L195 NwaCegarLoop]: trace histogram [460, 460, 460, 46, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:17,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 16:51:17,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:51:17,337 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:51:17,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:17,338 INFO L85 PathProgramCache]: Analyzing trace with hash 467146662, now seen corresponding path program 6 times [2022-11-25 16:51:17,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:17,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154701707] [2022-11-25 16:51:17,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:17,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:17,476 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:51:17,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [64843417] [2022-11-25 16:51:17,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 16:51:17,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:51:17,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:51:17,483 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:51:17,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 16:51:17,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 16:51:17,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:51:17,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 16:51:17,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:51:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 322537 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 322536 trivial. 0 not checked. [2022-11-25 16:51:18,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:51:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 322537 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 322536 trivial. 0 not checked. [2022-11-25 16:51:18,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:18,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154701707] [2022-11-25 16:51:18,263 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:51:18,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64843417] [2022-11-25 16:51:18,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64843417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:51:18,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:51:18,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-25 16:51:18,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159413730] [2022-11-25 16:51:18,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:51:18,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 16:51:18,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:18,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 16:51:18,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:51:18,267 INFO L87 Difference]: Start difference. First operand 1608 states and 2127 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:18,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:51:18,487 INFO L93 Difference]: Finished difference Result 3311 states and 4353 transitions. [2022-11-25 16:51:18,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:51:18,488 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1469 [2022-11-25 16:51:18,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:51:18,494 INFO L225 Difference]: With dead ends: 3311 [2022-11-25 16:51:18,494 INFO L226 Difference]: Without dead ends: 1755 [2022-11-25 16:51:18,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2936 GetRequests, 2932 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:51:18,497 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:51:18,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 52 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:51:18,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2022-11-25 16:51:18,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 1755. [2022-11-25 16:51:18,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1754 states have (on average 1.298175598631699) internal successors, (2277), 1754 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:18,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 2277 transitions. [2022-11-25 16:51:18,713 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 2277 transitions. Word has length 1469 [2022-11-25 16:51:18,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:51:18,713 INFO L495 AbstractCegarLoop]: Abstraction has 1755 states and 2277 transitions. [2022-11-25 16:51:18,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:18,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 2277 transitions. [2022-11-25 16:51:18,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1617 [2022-11-25 16:51:18,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:51:18,742 INFO L195 NwaCegarLoop]: trace histogram [460, 460, 460, 184, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:18,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 16:51:18,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 16:51:18,948 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:51:18,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:18,949 INFO L85 PathProgramCache]: Analyzing trace with hash -317084805, now seen corresponding path program 7 times [2022-11-25 16:51:18,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:18,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065190141] [2022-11-25 16:51:18,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:18,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:19,121 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:51:19,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380274693] [2022-11-25 16:51:19,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 16:51:19,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:51:19,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:51:19,123 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:51:19,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 16:51:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:20,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 5490 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 16:51:20,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:51:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 339049 backedges. 6631 proven. 1081 refuted. 0 times theorem prover too weak. 331337 trivial. 0 not checked. [2022-11-25 16:51:22,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:51:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 339049 backedges. 6631 proven. 1081 refuted. 0 times theorem prover too weak. 331337 trivial. 0 not checked. [2022-11-25 16:51:24,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:24,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065190141] [2022-11-25 16:51:24,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:51:24,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380274693] [2022-11-25 16:51:24,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380274693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:51:24,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:51:24,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-11-25 16:51:24,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920888194] [2022-11-25 16:51:24,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:51:24,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-25 16:51:24,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:24,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-25 16:51:24,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-11-25 16:51:24,557 INFO L87 Difference]: Start difference. First operand 1755 states and 2277 transitions. Second operand has 98 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 98 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:32,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:51:32,298 INFO L93 Difference]: Finished difference Result 5423 states and 7621 transitions. [2022-11-25 16:51:32,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-25 16:51:32,299 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 98 states have internal predecessors, (117), 0 states have call successors, (0), 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 1616 [2022-11-25 16:51:32,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:51:32,311 INFO L225 Difference]: With dead ends: 5423 [2022-11-25 16:51:32,311 INFO L226 Difference]: Without dead ends: 3718 [2022-11-25 16:51:32,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3277 GetRequests, 3134 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2022-11-25 16:51:32,317 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2723 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 756 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2723 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:51:32,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2723 Valid, 427 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [756 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 16:51:32,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2022-11-25 16:51:32,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 3531. [2022-11-25 16:51:32,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 3530 states have (on average 1.2977337110481586) internal successors, (4581), 3530 states have internal predecessors, (4581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:32,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 4581 transitions. [2022-11-25 16:51:32,704 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 4581 transitions. Word has length 1616 [2022-11-25 16:51:32,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:51:32,705 INFO L495 AbstractCegarLoop]: Abstraction has 3531 states and 4581 transitions. [2022-11-25 16:51:32,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 98 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:51:32,705 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 4581 transitions. [2022-11-25 16:51:32,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3249 [2022-11-25 16:51:32,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:51:32,802 INFO L195 NwaCegarLoop]: trace histogram [940, 940, 940, 376, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:51:32,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 16:51:33,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:51:33,002 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:51:33,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:33,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1104229509, now seen corresponding path program 8 times [2022-11-25 16:51:33,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:33,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647625021] [2022-11-25 16:51:33,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:33,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:33,337 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:51:33,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378633320] [2022-11-25 16:51:33,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:51:33,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:51:33,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:51:33,339 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:51:33,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 16:51:36,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:51:36,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:51:36,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 11058 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-25 16:51:36,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:51:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1405561 backedges. 27079 proven. 4465 refuted. 0 times theorem prover too weak. 1374017 trivial. 0 not checked. [2022-11-25 16:51:41,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:51:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1405561 backedges. 27079 proven. 4465 refuted. 0 times theorem prover too weak. 1374017 trivial. 0 not checked. [2022-11-25 16:51:50,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:50,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647625021] [2022-11-25 16:51:50,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:51:50,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378633320] [2022-11-25 16:51:50,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378633320] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:51:50,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:51:50,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 194 [2022-11-25 16:51:50,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952286099] [2022-11-25 16:51:50,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:51:50,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-11-25 16:51:50,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:50,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-11-25 16:51:50,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18531, Invalid=18911, Unknown=0, NotChecked=0, Total=37442 [2022-11-25 16:51:50,099 INFO L87 Difference]: Start difference. First operand 3531 states and 4581 transitions. Second operand has 194 states, 194 states have (on average 1.097938144329897) internal successors, (213), 194 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:52:39,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:52:39,807 INFO L93 Difference]: Finished difference Result 10895 states and 15301 transitions. [2022-11-25 16:52:39,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-11-25 16:52:39,808 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 1.097938144329897) internal successors, (213), 194 states have internal predecessors, (213), 0 states have call successors, (0), 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 3248 [2022-11-25 16:52:39,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:52:39,831 INFO L225 Difference]: With dead ends: 10895 [2022-11-25 16:52:39,831 INFO L226 Difference]: Without dead ends: 7462 [2022-11-25 16:52:39,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6589 GetRequests, 6302 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18145 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=36961, Invalid=46271, Unknown=0, NotChecked=0, Total=83232 [2022-11-25 16:52:39,845 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 8071 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 1975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8071 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 3144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1975 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-25 16:52:39,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8071 Valid, 795 Invalid, 3144 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1975 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-25 16:52:39,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7462 states. [2022-11-25 16:52:40,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7462 to 7083. [2022-11-25 16:52:40,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7083 states, 7082 states have (on average 1.2975148263202485) internal successors, (9189), 7082 states have internal predecessors, (9189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:52:40,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7083 states to 7083 states and 9189 transitions. [2022-11-25 16:52:40,657 INFO L78 Accepts]: Start accepts. Automaton has 7083 states and 9189 transitions. Word has length 3248 [2022-11-25 16:52:40,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:52:40,658 INFO L495 AbstractCegarLoop]: Abstraction has 7083 states and 9189 transitions. [2022-11-25 16:52:40,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 1.097938144329897) internal successors, (213), 194 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:52:40,659 INFO L276 IsEmpty]: Start isEmpty. Operand 7083 states and 9189 transitions. [2022-11-25 16:52:40,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6513 [2022-11-25 16:52:40,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:52:40,897 INFO L195 NwaCegarLoop]: trace histogram [1900, 1900, 1900, 760, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:52:40,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 16:52:41,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:52:41,098 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:52:41,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:52:41,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1384713083, now seen corresponding path program 9 times [2022-11-25 16:52:41,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:52:41,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103639117] [2022-11-25 16:52:41,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:52:41,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:52:41,595 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:52:41,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601780324] [2022-11-25 16:52:41,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:52:41,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:52:41,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:52:41,598 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:52:41,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 16:52:43,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 16:52:43,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:52:43,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 16:52:43,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:52:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5722777 backedges. 3818 proven. 0 refuted. 0 times theorem prover too weak. 5718959 trivial. 0 not checked. [2022-11-25 16:52:47,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:52:47,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:52:47,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103639117] [2022-11-25 16:52:47,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:52:47,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601780324] [2022-11-25 16:52:47,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601780324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:52:47,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:52:47,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 16:52:47,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821325827] [2022-11-25 16:52:47,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:52:47,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 16:52:47,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:52:47,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 16:52:47,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:52:47,019 INFO L87 Difference]: Start difference. First operand 7083 states and 9189 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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) [2022-11-25 16:52:47,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:52:47,799 INFO L93 Difference]: Finished difference Result 13954 states and 18349 transitions. [2022-11-25 16:52:47,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:52:47,800 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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) Word has length 6512 [2022-11-25 16:52:47,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:52:47,828 INFO L225 Difference]: With dead ends: 13954 [2022-11-25 16:52:47,828 INFO L226 Difference]: Without dead ends: 7650 [2022-11-25 16:52:47,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6512 GetRequests, 6507 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-25 16:52:47,838 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:52:47,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 28 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:52:47,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7650 states. [2022-11-25 16:52:48,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7650 to 7083. [2022-11-25 16:52:48,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7083 states, 7082 states have (on average 1.2973736232702626) internal successors, (9188), 7082 states have internal predecessors, (9188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:52:48,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7083 states to 7083 states and 9188 transitions. [2022-11-25 16:52:48,419 INFO L78 Accepts]: Start accepts. Automaton has 7083 states and 9188 transitions. Word has length 6512 [2022-11-25 16:52:48,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:52:48,421 INFO L495 AbstractCegarLoop]: Abstraction has 7083 states and 9188 transitions. [2022-11-25 16:52:48,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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) [2022-11-25 16:52:48,422 INFO L276 IsEmpty]: Start isEmpty. Operand 7083 states and 9188 transitions. [2022-11-25 16:52:48,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6513 [2022-11-25 16:52:48,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:52:48,683 INFO L195 NwaCegarLoop]: trace histogram [1900, 1900, 1899, 760, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:52:48,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 16:52:48,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 16:52:48,884 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:52:48,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:52:48,886 INFO L85 PathProgramCache]: Analyzing trace with hash 355652793, now seen corresponding path program 1 times [2022-11-25 16:52:48,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:52:48,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256579040] [2022-11-25 16:52:48,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:52:48,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:52:49,385 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:52:49,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526379112] [2022-11-25 16:52:49,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:52:49,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:52:49,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:52:49,387 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:52:49,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56dfee12-39c5-4b2f-b8e5-3f31bcc8c240/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 16:52:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:55,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 22192 conjuncts, 193 conjunts are in the unsatisfiable core [2022-11-25 16:52:55,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:53:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5722777 backedges. 109447 proven. 18145 refuted. 0 times theorem prover too weak. 5595185 trivial. 0 not checked. [2022-11-25 16:53:14,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:53:50,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5722777 backedges. 109447 proven. 18145 refuted. 0 times theorem prover too weak. 5595185 trivial. 0 not checked. [2022-11-25 16:53:50,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:53:50,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256579040] [2022-11-25 16:53:50,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:53:50,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526379112] [2022-11-25 16:53:50,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526379112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:53:50,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:53:50,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194] total 386 [2022-11-25 16:53:50,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486893074] [2022-11-25 16:53:50,224 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:53:50,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 386 states [2022-11-25 16:53:50,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:53:50,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 386 interpolants. [2022-11-25 16:53:50,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73923, Invalid=74687, Unknown=0, NotChecked=0, Total=148610 [2022-11-25 16:53:50,261 INFO L87 Difference]: Start difference. First operand 7083 states and 9188 transitions. Second operand has 386 states, 386 states have (on average 1.0518134715025906) internal successors, (406), 386 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)