./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de41.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de41.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc --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 71e52c2f7da6d5380080fb621ed04f7c322fd22e434b0426cf7577ab025ae680 --- 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-5e519f3 [2022-11-02 20:33:29,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:33:29,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:33:29,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:33:29,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:33:29,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:33:29,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:33:29,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:33:29,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:33:29,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:33:29,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:33:29,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:33:29,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:33:29,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:33:29,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:33:29,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:33:29,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:33:29,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:33:29,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:33:29,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:33:29,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:33:29,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:33:29,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:33:29,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:33:29,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:33:29,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:33:29,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:33:29,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:33:29,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:33:29,234 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:33:29,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:33:29,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:33:29,237 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:33:29,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:33:29,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:33:29,240 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:33:29,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:33:29,241 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:33:29,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:33:29,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:33:29,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:33:29,245 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:33:29,285 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:33:29,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:33:29,286 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:33:29,287 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:33:29,288 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:33:29,288 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:33:29,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:33:29,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:33:29,290 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:33:29,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:33:29,291 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:33:29,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:33:29,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:33:29,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:33:29,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:33:29,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:33:29,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:33:29,293 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:33:29,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:33:29,294 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:33:29,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:33:29,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:33:29,294 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:33:29,295 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:33:29,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:33:29,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:33:29,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:33:29,297 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:33:29,298 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:33:29,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:33:29,298 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:33:29,298 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:33:29,299 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:33:29,299 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71e52c2f7da6d5380080fb621ed04f7c322fd22e434b0426cf7577ab025ae680 [2022-11-02 20:33:29,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:33:29,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:33:29,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:33:29,649 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:33:29,650 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:33:29,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/loops-crafted-1/in-de41.c [2022-11-02 20:33:29,752 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/data/c7853e58d/e1360af5b211476782f4491aafd4d53b/FLAG894d252bf [2022-11-02 20:33:30,314 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:33:30,315 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/sv-benchmarks/c/loops-crafted-1/in-de41.c [2022-11-02 20:33:30,323 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/data/c7853e58d/e1360af5b211476782f4491aafd4d53b/FLAG894d252bf [2022-11-02 20:33:30,660 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/data/c7853e58d/e1360af5b211476782f4491aafd4d53b [2022-11-02 20:33:30,664 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:33:30,670 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:33:30,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:33:30,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:33:30,679 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:33:30,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:33:30" (1/1) ... [2022-11-02 20:33:30,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@789411bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:30, skipping insertion in model container [2022-11-02 20:33:30,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:33:30" (1/1) ... [2022-11-02 20:33:30,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:33:30,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:33:30,950 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/sv-benchmarks/c/loops-crafted-1/in-de41.c[368,381] [2022-11-02 20:33:30,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:33:30,988 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:33:31,009 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/sv-benchmarks/c/loops-crafted-1/in-de41.c[368,381] [2022-11-02 20:33:31,023 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:33:31,040 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:33:31,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:31 WrapperNode [2022-11-02 20:33:31,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:33:31,046 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:33:31,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:33:31,046 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:33:31,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:31" (1/1) ... [2022-11-02 20:33:31,062 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:31" (1/1) ... [2022-11-02 20:33:31,080 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-11-02 20:33:31,081 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:33:31,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:33:31,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:33:31,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:33:31,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:31" (1/1) ... [2022-11-02 20:33:31,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:31" (1/1) ... [2022-11-02 20:33:31,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:31" (1/1) ... [2022-11-02 20:33:31,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:31" (1/1) ... [2022-11-02 20:33:31,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:31" (1/1) ... [2022-11-02 20:33:31,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:31" (1/1) ... [2022-11-02 20:33:31,105 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:31" (1/1) ... [2022-11-02 20:33:31,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:31" (1/1) ... [2022-11-02 20:33:31,108 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:33:31,109 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:33:31,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:33:31,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:33:31,110 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:31" (1/1) ... [2022-11-02 20:33:31,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:33:31,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:33:31,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:33:31,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:33:31,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:33:31,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:33:31,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:33:31,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:33:31,275 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:33:31,278 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:33:31,520 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:33:31,543 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:33:31,543 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-02 20:33:31,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:33:31 BoogieIcfgContainer [2022-11-02 20:33:31,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:33:31,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:33:31,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:33:31,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:33:31,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:33:30" (1/3) ... [2022-11-02 20:33:31,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b594431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:33:31, skipping insertion in model container [2022-11-02 20:33:31,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:33:31" (2/3) ... [2022-11-02 20:33:31,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b594431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:33:31, skipping insertion in model container [2022-11-02 20:33:31,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:33:31" (3/3) ... [2022-11-02 20:33:31,568 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de41.c [2022-11-02 20:33:31,599 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:33:31,599 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:33:31,658 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:33:31,666 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;@69f6e063, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:33:31,666 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:33:31,671 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 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) [2022-11-02 20:33:31,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-02 20:33:31,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:31,680 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:31,681 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:31,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:31,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1522018600, now seen corresponding path program 1 times [2022-11-02 20:33:31,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:31,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611810810] [2022-11-02 20:33:31,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:31,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:31,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:31,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611810810] [2022-11-02 20:33:31,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611810810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:33:31,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:33:31,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:33:31,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320737592] [2022-11-02 20:33:31,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:33:31,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:33:31,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:33:31,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:33:31,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:33:31,946 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 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) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-02 20:33:32,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:32,012 INFO L93 Difference]: Finished difference Result 27 states and 41 transitions. [2022-11-02 20:33:32,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:33:32,014 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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 [2022-11-02 20:33:32,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:32,026 INFO L225 Difference]: With dead ends: 27 [2022-11-02 20:33:32,027 INFO L226 Difference]: Without dead ends: 11 [2022-11-02 20:33:32,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:33:32,042 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:32,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:33:32,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-02 20:33:32,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-02 20:33:32,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 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) [2022-11-02 20:33:32,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2022-11-02 20:33:32,086 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 10 [2022-11-02 20:33:32,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:32,087 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2022-11-02 20:33:32,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-02 20:33:32,088 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2022-11-02 20:33:32,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-02 20:33:32,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:32,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:32,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:33:32,091 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:32,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:32,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1522137764, now seen corresponding path program 1 times [2022-11-02 20:33:32,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:32,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845463025] [2022-11-02 20:33:32,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:32,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:32,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:32,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:32,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845463025] [2022-11-02 20:33:32,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845463025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:33:32,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:33:32,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:33:32,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423237268] [2022-11-02 20:33:32,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:33:32,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:33:32,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:33:32,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:33:32,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:33:32,821 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2022-11-02 20:33:32,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:32,924 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2022-11-02 20:33:32,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:33:32,925 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 [2022-11-02 20:33:32,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:32,926 INFO L225 Difference]: With dead ends: 29 [2022-11-02 20:33:32,926 INFO L226 Difference]: Without dead ends: 17 [2022-11-02 20:33:32,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:33:32,928 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:32,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 22 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:33:32,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-02 20:33:32,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-02 20:33:32,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:32,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-11-02 20:33:32,937 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 10 [2022-11-02 20:33:32,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:32,938 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-11-02 20:33:32,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2022-11-02 20:33:32,939 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-11-02 20:33:32,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 20:33:32,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:32,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:32,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:33:32,940 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:32,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:32,942 INFO L85 PathProgramCache]: Analyzing trace with hash 923648321, now seen corresponding path program 1 times [2022-11-02 20:33:32,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:32,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589626442] [2022-11-02 20:33:32,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:32,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:33,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:33,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589626442] [2022-11-02 20:33:33,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589626442] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:33:33,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507594402] [2022-11-02 20:33:33,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:33,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:33,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:33:33,057 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:33:33,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:33:33,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:33,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:33:33,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:33,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:33,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507594402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:33,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:33:33,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-02 20:33:33,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48202939] [2022-11-02 20:33:33,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:33,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:33:33,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:33:33,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:33:33,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:33:33,326 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2022-11-02 20:33:33,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:33,594 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2022-11-02 20:33:33,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:33:33,605 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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 11 [2022-11-02 20:33:33,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:33,608 INFO L225 Difference]: With dead ends: 65 [2022-11-02 20:33:33,608 INFO L226 Difference]: Without dead ends: 59 [2022-11-02 20:33:33,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:33:33,611 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:33,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 62 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:33:33,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-02 20:33:33,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 29. [2022-11-02 20:33:33,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:33,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-11-02 20:33:33,635 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 11 [2022-11-02 20:33:33,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:33,636 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-11-02 20:33:33,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2022-11-02 20:33:33,637 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-11-02 20:33:33,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-02 20:33:33,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:33,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:33,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:33:33,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:33,865 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:33,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:33,866 INFO L85 PathProgramCache]: Analyzing trace with hash -491381764, now seen corresponding path program 1 times [2022-11-02 20:33:33,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:33,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430029515] [2022-11-02 20:33:33,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:33,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:33,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:33:33,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:33,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430029515] [2022-11-02 20:33:33,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430029515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:33:33,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:33:33,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:33:33,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204133356] [2022-11-02 20:33:33,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:33:33,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:33:33,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:33:33,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:33:33,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:33:33,975 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:34,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:34,039 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2022-11-02 20:33:34,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:33:34,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-11-02 20:33:34,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:34,041 INFO L225 Difference]: With dead ends: 34 [2022-11-02 20:33:34,041 INFO L226 Difference]: Without dead ends: 24 [2022-11-02 20:33:34,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:33:34,043 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:34,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:33:34,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-02 20:33:34,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-02 20:33:34,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:34,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-11-02 20:33:34,052 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 12 [2022-11-02 20:33:34,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:34,055 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-11-02 20:33:34,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:34,057 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-11-02 20:33:34,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 20:33:34,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:34,060 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:34,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:33:34,062 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:34,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:34,065 INFO L85 PathProgramCache]: Analyzing trace with hash 607187538, now seen corresponding path program 1 times [2022-11-02 20:33:34,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:34,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037268480] [2022-11-02 20:33:34,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:34,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:33:34,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:34,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037268480] [2022-11-02 20:33:34,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037268480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:33:34,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089452988] [2022-11-02 20:33:34,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:34,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:34,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:33:34,213 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:33:34,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:33:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:34,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:33:34,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:33:34,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:33:34,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089452988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:34,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:33:34,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-02 20:33:34,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698934352] [2022-11-02 20:33:34,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:34,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:33:34,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:33:34,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:33:34,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:33:34,398 INFO L87 Difference]: Start difference. First operand 24 states and 32 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) [2022-11-02 20:33:34,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:34,442 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2022-11-02 20:33:34,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:33:34,443 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 [2022-11-02 20:33:34,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:34,444 INFO L225 Difference]: With dead ends: 39 [2022-11-02 20:33:34,444 INFO L226 Difference]: Without dead ends: 35 [2022-11-02 20:33:34,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:33:34,446 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:34,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:33:34,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-02 20:33:34,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-11-02 20:33:34,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:34,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2022-11-02 20:33:34,472 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 13 [2022-11-02 20:33:34,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:34,472 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2022-11-02 20:33:34,472 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) [2022-11-02 20:33:34,472 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2022-11-02 20:33:34,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 20:33:34,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:34,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:34,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:33:34,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:34,674 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:34,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:34,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1644609900, now seen corresponding path program 1 times [2022-11-02 20:33:34,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:34,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224619582] [2022-11-02 20:33:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:34,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:33:35,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:35,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224619582] [2022-11-02 20:33:35,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224619582] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:33:35,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148553952] [2022-11-02 20:33:35,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:35,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:35,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:33:35,366 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:33:35,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:33:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:35,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:33:35,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:35,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:36,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148553952] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:36,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:33:36,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-11-02 20:33:36,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228895912] [2022-11-02 20:33:36,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:36,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:33:36,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:33:36,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:33:36,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:33:36,325 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:37,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:37,658 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2022-11-02 20:33:37,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-02 20:33:37,664 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-02 20:33:37,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:37,665 INFO L225 Difference]: With dead ends: 77 [2022-11-02 20:33:37,665 INFO L226 Difference]: Without dead ends: 71 [2022-11-02 20:33:37,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:33:37,667 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 107 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:37,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 56 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:33:37,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-02 20:33:37,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 37. [2022-11-02 20:33:37,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 36 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:37,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 53 transitions. [2022-11-02 20:33:37,710 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 53 transitions. Word has length 14 [2022-11-02 20:33:37,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:37,711 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 53 transitions. [2022-11-02 20:33:37,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:37,712 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 53 transitions. [2022-11-02 20:33:37,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 20:33:37,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:37,714 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:37,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-02 20:33:37,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:37,917 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:37,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:37,918 INFO L85 PathProgramCache]: Analyzing trace with hash -2067097458, now seen corresponding path program 2 times [2022-11-02 20:33:37,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:37,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153302266] [2022-11-02 20:33:37,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:37,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:38,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:33:38,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:38,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153302266] [2022-11-02 20:33:38,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153302266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:33:38,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944754774] [2022-11-02 20:33:38,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:33:38,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:38,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:33:38,021 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:33:38,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:33:38,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:33:38,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:33:38,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:33:38,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:33:38,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:33:38,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944754774] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:38,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:33:38,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-02 20:33:38,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208410679] [2022-11-02 20:33:38,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:38,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:33:38,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:33:38,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:33:38,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:33:38,221 INFO L87 Difference]: Start difference. First operand 37 states and 53 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2022-11-02 20:33:38,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:38,460 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2022-11-02 20:33:38,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:33:38,469 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 14 [2022-11-02 20:33:38,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:38,470 INFO L225 Difference]: With dead ends: 74 [2022-11-02 20:33:38,470 INFO L226 Difference]: Without dead ends: 63 [2022-11-02 20:33:38,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:33:38,472 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:38,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 76 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:33:38,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-02 20:33:38,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 34. [2022-11-02 20:33:38,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:38,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2022-11-02 20:33:38,508 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 14 [2022-11-02 20:33:38,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:38,508 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2022-11-02 20:33:38,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2022-11-02 20:33:38,509 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2022-11-02 20:33:38,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 20:33:38,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:38,511 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:38,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:33:38,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 20:33:38,737 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:38,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:38,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1219996004, now seen corresponding path program 2 times [2022-11-02 20:33:38,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:38,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379328521] [2022-11-02 20:33:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:38,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:38,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:38,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379328521] [2022-11-02 20:33:38,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379328521] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:33:38,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825510260] [2022-11-02 20:33:38,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:33:38,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:38,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:33:38,905 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:33:38,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:33:38,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:33:38,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:33:38,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 20:33:38,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:39,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:39,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825510260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:39,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:33:39,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-11-02 20:33:39,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415853667] [2022-11-02 20:33:39,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:39,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:33:39,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:33:39,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:33:39,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:33:39,193 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:40,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:40,554 INFO L93 Difference]: Finished difference Result 166 states and 229 transitions. [2022-11-02 20:33:40,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 20:33:40,556 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-02 20:33:40,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:40,557 INFO L225 Difference]: With dead ends: 166 [2022-11-02 20:33:40,557 INFO L226 Difference]: Without dead ends: 156 [2022-11-02 20:33:40,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2022-11-02 20:33:40,559 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 257 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:40,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 184 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:33:40,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-02 20:33:40,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 60. [2022-11-02 20:33:40,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 59 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:40,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 83 transitions. [2022-11-02 20:33:40,621 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 83 transitions. Word has length 14 [2022-11-02 20:33:40,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:40,621 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 83 transitions. [2022-11-02 20:33:40,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:40,621 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 83 transitions. [2022-11-02 20:33:40,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-02 20:33:40,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:40,624 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:40,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:33:40,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:40,849 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:40,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:40,849 INFO L85 PathProgramCache]: Analyzing trace with hash -555035246, now seen corresponding path program 2 times [2022-11-02 20:33:40,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:40,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770803314] [2022-11-02 20:33:40,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:40,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:40,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:41,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:33:41,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:41,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770803314] [2022-11-02 20:33:41,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770803314] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:33:41,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516585355] [2022-11-02 20:33:41,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:33:41,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:41,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:33:41,005 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:33:41,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:33:41,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:33:41,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:33:41,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:33:41,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:41,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:33:41,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:33:41,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516585355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:41,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:33:41,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-02 20:33:41,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682094251] [2022-11-02 20:33:41,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:41,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:33:41,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:33:41,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:33:41,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:33:41,152 INFO L87 Difference]: Start difference. First operand 60 states and 83 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:41,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:41,215 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2022-11-02 20:33:41,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:33:41,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-02 20:33:41,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:41,217 INFO L225 Difference]: With dead ends: 70 [2022-11-02 20:33:41,217 INFO L226 Difference]: Without dead ends: 58 [2022-11-02 20:33:41,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:33:41,218 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:41,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:33:41,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-02 20:33:41,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-11-02 20:33:41,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 57 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:41,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 82 transitions. [2022-11-02 20:33:41,277 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 82 transitions. Word has length 15 [2022-11-02 20:33:41,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:41,278 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 82 transitions. [2022-11-02 20:33:41,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:41,279 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 82 transitions. [2022-11-02 20:33:41,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-02 20:33:41,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:41,280 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:41,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:33:41,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:41,505 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:41,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:41,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1176713020, now seen corresponding path program 3 times [2022-11-02 20:33:41,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:41,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095945551] [2022-11-02 20:33:41,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:41,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:33:41,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:41,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095945551] [2022-11-02 20:33:41,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095945551] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:33:41,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532158785] [2022-11-02 20:33:41,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:33:41,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:41,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:33:41,636 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:33:41,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:33:41,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:33:41,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:33:41,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:33:41,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:33:41,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:33:41,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532158785] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:41,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:33:41,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-11-02 20:33:41,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937652532] [2022-11-02 20:33:41,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:41,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:33:41,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:33:41,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:33:41,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:33:41,884 INFO L87 Difference]: Start difference. First operand 58 states and 82 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2022-11-02 20:33:42,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:42,172 INFO L93 Difference]: Finished difference Result 109 states and 137 transitions. [2022-11-02 20:33:42,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:33:42,173 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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 16 [2022-11-02 20:33:42,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:42,174 INFO L225 Difference]: With dead ends: 109 [2022-11-02 20:33:42,174 INFO L226 Difference]: Without dead ends: 93 [2022-11-02 20:33:42,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:33:42,175 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:42,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 71 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:33:42,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-02 20:33:42,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2022-11-02 20:33:42,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 55 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:42,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2022-11-02 20:33:42,216 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 16 [2022-11-02 20:33:42,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:42,216 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2022-11-02 20:33:42,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2022-11-02 20:33:42,217 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2022-11-02 20:33:42,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-02 20:33:42,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:42,218 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:42,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:33:42,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:33:42,441 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:42,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:42,442 INFO L85 PathProgramCache]: Analyzing trace with hash 720326044, now seen corresponding path program 3 times [2022-11-02 20:33:42,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:42,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953772772] [2022-11-02 20:33:42,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:42,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:33:42,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:42,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953772772] [2022-11-02 20:33:42,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953772772] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:33:42,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7681401] [2022-11-02 20:33:42,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:33:42,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:42,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:33:42,642 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:33:42,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:33:42,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:33:42,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:33:42,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:33:42,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:33:42,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:33:42,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7681401] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:42,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:33:42,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-11-02 20:33:42,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611650547] [2022-11-02 20:33:42,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:42,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:33:42,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:33:42,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:33:42,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:33:42,861 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:42,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:42,967 INFO L93 Difference]: Finished difference Result 77 states and 108 transitions. [2022-11-02 20:33:42,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:33:42,968 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-02 20:33:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:42,969 INFO L225 Difference]: With dead ends: 77 [2022-11-02 20:33:42,969 INFO L226 Difference]: Without dead ends: 73 [2022-11-02 20:33:42,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:33:42,971 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 22 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:42,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 44 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:33:42,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-02 20:33:43,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-11-02 20:33:43,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 70 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:43,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 99 transitions. [2022-11-02 20:33:43,021 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 99 transitions. Word has length 16 [2022-11-02 20:33:43,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:43,021 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 99 transitions. [2022-11-02 20:33:43,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:43,021 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 99 transitions. [2022-11-02 20:33:43,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:33:43,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:43,023 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:43,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:33:43,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:43,241 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:43,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:43,241 INFO L85 PathProgramCache]: Analyzing trace with hash 796886620, now seen corresponding path program 4 times [2022-11-02 20:33:43,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:43,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518180347] [2022-11-02 20:33:43,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:43,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:43,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:33:43,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:43,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518180347] [2022-11-02 20:33:43,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518180347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:33:43,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518115422] [2022-11-02 20:33:43,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:33:43,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:43,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:33:43,964 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:33:43,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:33:44,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:33:44,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:33:44,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-02 20:33:44,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:44,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:33:45,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518115422] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:45,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:33:45,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 11] total 29 [2022-11-02 20:33:45,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996764466] [2022-11-02 20:33:45,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:45,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 20:33:45,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:33:45,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 20:33:45,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:33:45,074 INFO L87 Difference]: Start difference. First operand 71 states and 99 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:47,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:47,284 INFO L93 Difference]: Finished difference Result 152 states and 189 transitions. [2022-11-02 20:33:47,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-02 20:33:47,285 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:33:47,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:47,286 INFO L225 Difference]: With dead ends: 152 [2022-11-02 20:33:47,286 INFO L226 Difference]: Without dead ends: 131 [2022-11-02 20:33:47,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=457, Invalid=1993, Unknown=0, NotChecked=0, Total=2450 [2022-11-02 20:33:47,289 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 120 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:47,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 139 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:33:47,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-02 20:33:47,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2022-11-02 20:33:47,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.3908045977011494) internal successors, (121), 87 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:47,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2022-11-02 20:33:47,357 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 18 [2022-11-02 20:33:47,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:47,357 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2022-11-02 20:33:47,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:47,358 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2022-11-02 20:33:47,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:33:47,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:47,359 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:47,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:33:47,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:33:47,573 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:47,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:47,573 INFO L85 PathProgramCache]: Analyzing trace with hash -922594724, now seen corresponding path program 4 times [2022-11-02 20:33:47,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:47,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076359921] [2022-11-02 20:33:47,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:47,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:33:47,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:47,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076359921] [2022-11-02 20:33:47,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076359921] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:33:47,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366139193] [2022-11-02 20:33:47,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:33:47,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:47,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:33:47,728 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:33:47,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:33:47,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:33:47,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:33:47,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 20:33:47,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:33:47,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:33:48,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366139193] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:48,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:33:48,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-11-02 20:33:48,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165580525] [2022-11-02 20:33:48,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:48,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:33:48,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:33:48,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:33:48,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:33:48,146 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:48,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:48,450 INFO L93 Difference]: Finished difference Result 115 states and 150 transitions. [2022-11-02 20:33:48,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:33:48,451 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:33:48,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:48,452 INFO L225 Difference]: With dead ends: 115 [2022-11-02 20:33:48,452 INFO L226 Difference]: Without dead ends: 95 [2022-11-02 20:33:48,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:33:48,454 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 46 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:48,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 92 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:33:48,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-02 20:33:48,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2022-11-02 20:33:48,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.380281690140845) internal successors, (98), 71 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:48,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 98 transitions. [2022-11-02 20:33:48,519 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 98 transitions. Word has length 18 [2022-11-02 20:33:48,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:48,519 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 98 transitions. [2022-11-02 20:33:48,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:48,520 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 98 transitions. [2022-11-02 20:33:48,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-02 20:33:48,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:48,520 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:48,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:33:48,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:48,734 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:48,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:48,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1610400402, now seen corresponding path program 5 times [2022-11-02 20:33:48,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:48,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325041069] [2022-11-02 20:33:48,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:48,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:33:48,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:48,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325041069] [2022-11-02 20:33:48,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325041069] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:33:48,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748632843] [2022-11-02 20:33:48,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:33:48,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:48,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:33:48,905 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:33:48,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:33:48,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-02 20:33:48,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:33:48,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:33:48,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:33:49,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:33:49,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748632843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:49,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:33:49,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2022-11-02 20:33:49,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397397360] [2022-11-02 20:33:49,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:49,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:33:49,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:33:49,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:33:49,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:33:49,126 INFO L87 Difference]: Start difference. First operand 72 states and 98 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:49,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:49,302 INFO L93 Difference]: Finished difference Result 96 states and 133 transitions. [2022-11-02 20:33:49,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:33:49,303 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-02 20:33:49,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:49,304 INFO L225 Difference]: With dead ends: 96 [2022-11-02 20:33:49,304 INFO L226 Difference]: Without dead ends: 92 [2022-11-02 20:33:49,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:33:49,306 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:49,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 96 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:33:49,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-02 20:33:49,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2022-11-02 20:33:49,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.3837209302325582) internal successors, (119), 86 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:49,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 119 transitions. [2022-11-02 20:33:49,355 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 119 transitions. Word has length 19 [2022-11-02 20:33:49,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:49,355 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 119 transitions. [2022-11-02 20:33:49,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:49,356 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 119 transitions. [2022-11-02 20:33:49,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-02 20:33:49,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:49,357 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:49,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:33:49,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:33:49,575 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:49,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:49,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1793951343, now seen corresponding path program 5 times [2022-11-02 20:33:49,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:49,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497730481] [2022-11-02 20:33:49,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:49,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:33:49,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:49,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497730481] [2022-11-02 20:33:49,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497730481] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:33:49,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401923088] [2022-11-02 20:33:49,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:33:49,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:49,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:33:49,778 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:33:49,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:33:49,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-02 20:33:49,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:33:49,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:33:49,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:49,929 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:33:49,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:33:50,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401923088] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:50,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:33:50,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-02 20:33:50,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080894276] [2022-11-02 20:33:50,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:50,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:33:50,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:33:50,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:33:50,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:33:50,163 INFO L87 Difference]: Start difference. First operand 87 states and 119 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:58,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:58,639 INFO L93 Difference]: Finished difference Result 362 states and 466 transitions. [2022-11-02 20:33:58,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-02 20:33:58,640 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-02 20:33:58,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:58,642 INFO L225 Difference]: With dead ends: 362 [2022-11-02 20:33:58,643 INFO L226 Difference]: Without dead ends: 337 [2022-11-02 20:33:58,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1448, Invalid=3954, Unknown=0, NotChecked=0, Total=5402 [2022-11-02 20:33:58,646 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 464 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:58,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 385 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 20:33:58,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-11-02 20:33:58,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 104. [2022-11-02 20:33:58,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.3786407766990292) internal successors, (142), 103 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:58,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 142 transitions. [2022-11-02 20:33:58,713 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 142 transitions. Word has length 19 [2022-11-02 20:33:58,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:58,713 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 142 transitions. [2022-11-02 20:33:58,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:58,714 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 142 transitions. [2022-11-02 20:33:58,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-02 20:33:58,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:58,715 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:58,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-02 20:33:58,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:33:58,921 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:58,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:58,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1979130930, now seen corresponding path program 6 times [2022-11-02 20:33:58,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:58,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381627929] [2022-11-02 20:33:58,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:58,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:33:59,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:59,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381627929] [2022-11-02 20:33:59,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381627929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:33:59,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206123185] [2022-11-02 20:33:59,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:33:59,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:59,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:33:59,088 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:33:59,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:33:59,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-02 20:33:59,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:33:59,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:33:59,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:59,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:33:59,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:33:59,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206123185] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:59,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:33:59,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-11-02 20:33:59,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144865594] [2022-11-02 20:33:59,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:59,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:33:59,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:33:59,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:33:59,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:33:59,406 INFO L87 Difference]: Start difference. First operand 104 states and 142 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:00,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:34:00,176 INFO L93 Difference]: Finished difference Result 185 states and 226 transitions. [2022-11-02 20:34:00,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:34:00,176 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-02 20:34:00,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:34:00,178 INFO L225 Difference]: With dead ends: 185 [2022-11-02 20:34:00,178 INFO L226 Difference]: Without dead ends: 166 [2022-11-02 20:34:00,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:34:00,179 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 59 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:34:00,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 270 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:34:00,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-02 20:34:00,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 100. [2022-11-02 20:34:00,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.3535353535353536) internal successors, (134), 99 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:00,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 134 transitions. [2022-11-02 20:34:00,225 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 134 transitions. Word has length 20 [2022-11-02 20:34:00,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:34:00,225 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 134 transitions. [2022-11-02 20:34:00,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:00,226 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 134 transitions. [2022-11-02 20:34:00,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 20:34:00,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:34:00,227 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:00,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:00,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:34:00,433 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:34:00,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:00,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1987539476, now seen corresponding path program 7 times [2022-11-02 20:34:00,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:00,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434241129] [2022-11-02 20:34:00,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:00,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:34:01,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:01,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434241129] [2022-11-02 20:34:01,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434241129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:34:01,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195138980] [2022-11-02 20:34:01,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:34:01,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:01,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:01,186 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:01,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:34:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:01,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-02 20:34:01,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:03,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:34:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:05,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195138980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:34:05,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:34:05,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 18] total 40 [2022-11-02 20:34:05,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21322904] [2022-11-02 20:34:05,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:34:05,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-02 20:34:05,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:05,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-02 20:34:05,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1240, Unknown=0, NotChecked=0, Total=1560 [2022-11-02 20:34:05,235 INFO L87 Difference]: Start difference. First operand 100 states and 134 transitions. Second operand has 40 states, 40 states have (on average 1.425) internal successors, (57), 40 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) [2022-11-02 20:34:12,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:34:12,269 INFO L93 Difference]: Finished difference Result 198 states and 248 transitions. [2022-11-02 20:34:12,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-02 20:34:12,270 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.425) internal successors, (57), 40 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) Word has length 22 [2022-11-02 20:34:12,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:34:12,271 INFO L225 Difference]: With dead ends: 198 [2022-11-02 20:34:12,271 INFO L226 Difference]: Without dead ends: 179 [2022-11-02 20:34:12,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1691 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1229, Invalid=4777, Unknown=0, NotChecked=0, Total=6006 [2022-11-02 20:34:12,274 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 254 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:34:12,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 126 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-02 20:34:12,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-02 20:34:12,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 124. [2022-11-02 20:34:12,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.3414634146341464) internal successors, (165), 123 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:12,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 165 transitions. [2022-11-02 20:34:12,344 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 165 transitions. Word has length 22 [2022-11-02 20:34:12,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:34:12,344 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 165 transitions. [2022-11-02 20:34:12,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.425) internal successors, (57), 40 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) [2022-11-02 20:34:12,345 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 165 transitions. [2022-11-02 20:34:12,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 20:34:12,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:34:12,346 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:12,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:12,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:34:12,557 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:34:12,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:12,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1562904434, now seen corresponding path program 6 times [2022-11-02 20:34:12,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:12,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521195997] [2022-11-02 20:34:12,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:12,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:12,742 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:34:12,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:12,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521195997] [2022-11-02 20:34:12,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521195997] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:34:12,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512626664] [2022-11-02 20:34:12,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:34:12,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:12,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:12,746 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:12,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:34:12,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-02 20:34:12,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:34:12,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 20:34:12,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:12,959 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:34:12,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:34:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:34:13,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512626664] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:34:13,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:34:13,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-02 20:34:13,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085391214] [2022-11-02 20:34:13,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:34:13,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 20:34:13,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:13,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 20:34:13,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:34:13,170 INFO L87 Difference]: Start difference. First operand 124 states and 165 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:13,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:34:13,708 INFO L93 Difference]: Finished difference Result 165 states and 209 transitions. [2022-11-02 20:34:13,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 20:34:13,709 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-02 20:34:13,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:34:13,710 INFO L225 Difference]: With dead ends: 165 [2022-11-02 20:34:13,710 INFO L226 Difference]: Without dead ends: 140 [2022-11-02 20:34:13,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:34:13,712 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 78 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:34:13,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 105 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:34:13,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-02 20:34:13,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 103. [2022-11-02 20:34:13,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.3431372549019607) internal successors, (137), 102 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:13,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 137 transitions. [2022-11-02 20:34:13,756 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 137 transitions. Word has length 22 [2022-11-02 20:34:13,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:34:13,756 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 137 transitions. [2022-11-02 20:34:13,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:13,756 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 137 transitions. [2022-11-02 20:34:13,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 20:34:13,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:34:13,757 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:13,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:13,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:13,957 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:34:13,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:13,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1894811100, now seen corresponding path program 7 times [2022-11-02 20:34:13,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:13,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246974890] [2022-11-02 20:34:13,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:13,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 20:34:14,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:14,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246974890] [2022-11-02 20:34:14,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246974890] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:34:14,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093322403] [2022-11-02 20:34:14,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:34:14,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:14,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:14,204 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:14,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:34:14,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:14,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:34:14,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 20:34:14,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:34:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 20:34:14,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093322403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:34:14,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:34:14,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 14 [2022-11-02 20:34:14,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040234506] [2022-11-02 20:34:14,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:34:14,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:34:14,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:14,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:34:14,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:34:14,441 INFO L87 Difference]: Start difference. First operand 103 states and 137 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:14,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:34:14,675 INFO L93 Difference]: Finished difference Result 134 states and 182 transitions. [2022-11-02 20:34:14,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:34:14,675 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-02 20:34:14,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:34:14,677 INFO L225 Difference]: With dead ends: 134 [2022-11-02 20:34:14,677 INFO L226 Difference]: Without dead ends: 130 [2022-11-02 20:34:14,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:34:14,678 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:34:14,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 135 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:34:14,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-02 20:34:14,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2022-11-02 20:34:14,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.3471074380165289) internal successors, (163), 121 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:14,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 163 transitions. [2022-11-02 20:34:14,731 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 163 transitions. Word has length 22 [2022-11-02 20:34:14,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:34:14,731 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 163 transitions. [2022-11-02 20:34:14,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:14,732 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 163 transitions. [2022-11-02 20:34:14,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-02 20:34:14,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:34:14,732 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:14,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:14,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:14,933 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:34:14,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:14,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1912260034, now seen corresponding path program 8 times [2022-11-02 20:34:14,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:14,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445286310] [2022-11-02 20:34:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:14,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 20:34:15,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:15,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445286310] [2022-11-02 20:34:15,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445286310] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:34:15,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903218121] [2022-11-02 20:34:15,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:34:15,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:15,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:15,188 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:15,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:34:15,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:34:15,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:34:15,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-02 20:34:15,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 20:34:15,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:34:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 20:34:15,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903218121] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:34:15,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:34:15,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-11-02 20:34:15,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000008803] [2022-11-02 20:34:15,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:34:15,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 20:34:15,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:15,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 20:34:15,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-11-02 20:34:15,793 INFO L87 Difference]: Start difference. First operand 122 states and 163 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:17,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:34:17,458 INFO L93 Difference]: Finished difference Result 274 states and 331 transitions. [2022-11-02 20:34:17,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:34:17,459 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-02 20:34:17,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:34:17,461 INFO L225 Difference]: With dead ends: 274 [2022-11-02 20:34:17,461 INFO L226 Difference]: Without dead ends: 247 [2022-11-02 20:34:17,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=489, Invalid=1863, Unknown=0, NotChecked=0, Total=2352 [2022-11-02 20:34:17,463 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 163 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:34:17,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 188 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:34:17,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-11-02 20:34:17,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 139. [2022-11-02 20:34:17,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.3115942028985508) internal successors, (181), 138 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:17,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 181 transitions. [2022-11-02 20:34:17,548 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 181 transitions. Word has length 23 [2022-11-02 20:34:17,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:34:17,548 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 181 transitions. [2022-11-02 20:34:17,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:17,548 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 181 transitions. [2022-11-02 20:34:17,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-02 20:34:17,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:34:17,549 INFO L195 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:17,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-02 20:34:17,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:17,777 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:34:17,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:17,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1236870529, now seen corresponding path program 3 times [2022-11-02 20:34:17,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:17,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505737074] [2022-11-02 20:34:17,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:17,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:18,106 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:18,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:18,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505737074] [2022-11-02 20:34:18,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505737074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:34:18,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204234743] [2022-11-02 20:34:18,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:34:18,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:18,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:18,109 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:18,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:34:18,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-02 20:34:18,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:34:18,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-02 20:34:18,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:18,435 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:18,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:34:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:19,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204234743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:34:19,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:34:19,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-11-02 20:34:19,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484606619] [2022-11-02 20:34:19,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:34:19,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 20:34:19,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:19,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 20:34:19,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:34:19,036 INFO L87 Difference]: Start difference. First operand 139 states and 181 transitions. Second operand has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:33,414 WARN L234 SmtUtils]: Spent 6.18s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:34:51,824 WARN L234 SmtUtils]: Spent 5.93s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:35:54,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:35:54,380 INFO L93 Difference]: Finished difference Result 847 states and 1132 transitions. [2022-11-02 20:35:54,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-02 20:35:54,381 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-02 20:35:54,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:35:54,385 INFO L225 Difference]: With dead ends: 847 [2022-11-02 20:35:54,385 INFO L226 Difference]: Without dead ends: 807 [2022-11-02 20:35:54,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1705 ImplicationChecksByTransitivity, 90.3s TimeCoverageRelationStatistics Valid=2101, Invalid=4705, Unknown=0, NotChecked=0, Total=6806 [2022-11-02 20:35:54,389 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 1414 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 773 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1414 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 773 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:35:54,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1414 Valid, 984 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [773 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-02 20:35:54,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-11-02 20:35:54,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 201. [2022-11-02 20:35:54,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.365) internal successors, (273), 200 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:54,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 273 transitions. [2022-11-02 20:35:54,536 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 273 transitions. Word has length 23 [2022-11-02 20:35:54,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:35:54,536 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 273 transitions. [2022-11-02 20:35:54,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:54,537 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 273 transitions. [2022-11-02 20:35:54,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 20:35:54,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:54,538 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:54,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:35:54,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:35:54,744 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:54,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:54,745 INFO L85 PathProgramCache]: Analyzing trace with hash -510369070, now seen corresponding path program 9 times [2022-11-02 20:35:54,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:35:54,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577141484] [2022-11-02 20:35:54,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:54,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:35:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:55,086 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:35:55,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:35:55,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577141484] [2022-11-02 20:35:55,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577141484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:35:55,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684945686] [2022-11-02 20:35:55,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:35:55,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:35:55,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:35:55,089 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:35:55,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:35:55,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 20:35:55,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:35:55,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 20:35:55,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:35:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:35:55,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:35:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:35:55,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684945686] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:35:55,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:35:55,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 17 [2022-11-02 20:35:55,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987255042] [2022-11-02 20:35:55,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:35:55,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:35:55,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:35:55,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:35:55,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:35:55,501 INFO L87 Difference]: Start difference. First operand 201 states and 273 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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) [2022-11-02 20:35:55,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:35:55,999 INFO L93 Difference]: Finished difference Result 248 states and 342 transitions. [2022-11-02 20:35:56,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:35:56,000 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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) Word has length 25 [2022-11-02 20:35:56,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:35:56,002 INFO L225 Difference]: With dead ends: 248 [2022-11-02 20:35:56,002 INFO L226 Difference]: Without dead ends: 244 [2022-11-02 20:35:56,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:35:56,005 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 46 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:35:56,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 146 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:35:56,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-02 20:35:56,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 234. [2022-11-02 20:35:56,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.3690987124463518) internal successors, (319), 233 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:56,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 319 transitions. [2022-11-02 20:35:56,159 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 319 transitions. Word has length 25 [2022-11-02 20:35:56,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:35:56,159 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 319 transitions. [2022-11-02 20:35:56,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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) [2022-11-02 20:35:56,160 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 319 transitions. [2022-11-02 20:35:56,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:35:56,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:56,162 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:56,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:35:56,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:35:56,367 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:56,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:56,368 INFO L85 PathProgramCache]: Analyzing trace with hash -955275428, now seen corresponding path program 8 times [2022-11-02 20:35:56,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:35:56,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732952806] [2022-11-02 20:35:56,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:56,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:35:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:57,215 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:35:57,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:35:57,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732952806] [2022-11-02 20:35:57,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732952806] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:35:57,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966286907] [2022-11-02 20:35:57,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:35:57,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:35:57,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:35:57,218 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:35:57,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-02 20:35:57,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:35:57,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:35:57,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-02 20:35:57,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:35:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:58,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:35:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:59,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966286907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:35:59,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:35:59,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 16] total 44 [2022-11-02 20:35:59,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897303384] [2022-11-02 20:35:59,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:35:59,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-02 20:35:59,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:35:59,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-02 20:35:59,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1577, Unknown=0, NotChecked=0, Total=1892 [2022-11-02 20:35:59,917 INFO L87 Difference]: Start difference. First operand 234 states and 319 transitions. Second operand has 44 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 44 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:05,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:05,432 INFO L93 Difference]: Finished difference Result 343 states and 431 transitions. [2022-11-02 20:36:05,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-02 20:36:05,433 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 44 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-02 20:36:05,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:05,437 INFO L225 Difference]: With dead ends: 343 [2022-11-02 20:36:05,437 INFO L226 Difference]: Without dead ends: 318 [2022-11-02 20:36:05,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=801, Invalid=3621, Unknown=0, NotChecked=0, Total=4422 [2022-11-02 20:36:05,440 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 143 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:05,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 135 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-02 20:36:05,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-11-02 20:36:05,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 232. [2022-11-02 20:36:05,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.3722943722943723) internal successors, (317), 231 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:05,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 317 transitions. [2022-11-02 20:36:05,614 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 317 transitions. Word has length 26 [2022-11-02 20:36:05,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:05,615 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 317 transitions. [2022-11-02 20:36:05,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 44 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:05,615 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 317 transitions. [2022-11-02 20:36:05,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:36:05,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:05,616 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:05,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:05,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-02 20:36:05,831 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:05,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:05,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1118982868, now seen corresponding path program 9 times [2022-11-02 20:36:05,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:05,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3189624] [2022-11-02 20:36:05,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:05,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:06,082 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-02 20:36:06,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:06,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3189624] [2022-11-02 20:36:06,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3189624] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:06,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538382556] [2022-11-02 20:36:06,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:36:06,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:06,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:06,084 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:06,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-02 20:36:06,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 20:36:06,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:36:06,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-02 20:36:06,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:06,388 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-02 20:36:06,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:06,673 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 20:36:06,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538382556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:06,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:36:06,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 24 [2022-11-02 20:36:06,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136772897] [2022-11-02 20:36:06,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:06,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 20:36:06,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:06,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 20:36:06,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:36:06,675 INFO L87 Difference]: Start difference. First operand 232 states and 317 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:08,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:08,213 INFO L93 Difference]: Finished difference Result 398 states and 486 transitions. [2022-11-02 20:36:08,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:36:08,213 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-02 20:36:08,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:08,215 INFO L225 Difference]: With dead ends: 398 [2022-11-02 20:36:08,216 INFO L226 Difference]: Without dead ends: 333 [2022-11-02 20:36:08,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:36:08,217 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 100 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:08,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 391 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:36:08,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-11-02 20:36:08,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 217. [2022-11-02 20:36:08,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.3425925925925926) internal successors, (290), 216 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:08,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 290 transitions. [2022-11-02 20:36:08,349 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 290 transitions. Word has length 26 [2022-11-02 20:36:08,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:08,349 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 290 transitions. [2022-11-02 20:36:08,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:08,349 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 290 transitions. [2022-11-02 20:36:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:36:08,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:08,350 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:08,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:08,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-02 20:36:08,561 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:08,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:08,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1509115665, now seen corresponding path program 10 times [2022-11-02 20:36:08,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:08,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670106697] [2022-11-02 20:36:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:08,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:36:08,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:08,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670106697] [2022-11-02 20:36:08,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670106697] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:08,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960846213] [2022-11-02 20:36:08,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:36:08,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:08,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:09,001 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:09,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdfe3f6-a7c2-49d7-b47b-38046745cf9f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-02 20:36:09,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:36:09,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:36:09,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-02 20:36:09,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:36:09,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:36:09,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960846213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:09,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:36:09,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2022-11-02 20:36:09,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467875489] [2022-11-02 20:36:09,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:09,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-02 20:36:09,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:09,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-02 20:36:09,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 20:36:09,753 INFO L87 Difference]: Start difference. First operand 217 states and 290 transitions. Second operand has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:31,062 WARN L234 SmtUtils]: Spent 12.98s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:36:41,943 WARN L234 SmtUtils]: Spent 5.46s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:37:04,099 WARN L234 SmtUtils]: Spent 14.88s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:37:14,865 WARN L234 SmtUtils]: Spent 5.03s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:37:34,957 WARN L234 SmtUtils]: Spent 11.81s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)