./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/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_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/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_6515a8c8-192c-4381-a845-521fc75dbde1/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 9a814f1cabb0a814aaaa0ad04ef0792a07c6fb7c73876a2da6ae85372115ff6c --- 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 20:22:31,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:22:31,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:22:31,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:22:31,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:22:31,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:22:31,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:22:31,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:22:31,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:22:31,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:22:31,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:22:31,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:22:31,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:22:31,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:22:31,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:22:31,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:22:31,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:22:31,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:22:31,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:22:31,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:22:31,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:22:31,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:22:31,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:22:31,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:22:31,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:22:31,290 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:22:31,291 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:22:31,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:22:31,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:22:31,295 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:22:31,296 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:22:31,297 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:22:31,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:22:31,302 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:22:31,303 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:22:31,303 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:22:31,304 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:22:31,305 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:22:31,305 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:22:31,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:22:31,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:22:31,308 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:22:31,354 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:22:31,354 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:22:31,355 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:22:31,356 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:22:31,357 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:22:31,357 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:22:31,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:22:31,358 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:22:31,358 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:22:31,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:22:31,360 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:22:31,361 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:22:31,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:22:31,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:22:31,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:22:31,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:22:31,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:22:31,362 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:22:31,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:22:31,363 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:22:31,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:22:31,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:22:31,364 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:22:31,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:22:31,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:22:31,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:22:31,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:22:31,365 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:22:31,366 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:22:31,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:22:31,366 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:22:31,367 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:22:31,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:22:31,367 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_6515a8c8-192c-4381-a845-521fc75dbde1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a814f1cabb0a814aaaa0ad04ef0792a07c6fb7c73876a2da6ae85372115ff6c [2022-11-02 20:22:31,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:22:31,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:22:31,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:22:31,764 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:22:31,765 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:22:31,767 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i [2022-11-02 20:22:31,859 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/data/d8f60a8da/10b2041eef7641d8af2a808bcb0ded2c/FLAG47c31124b [2022-11-02 20:22:32,608 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:22:32,608 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i [2022-11-02 20:22:32,628 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/data/d8f60a8da/10b2041eef7641d8af2a808bcb0ded2c/FLAG47c31124b [2022-11-02 20:22:32,815 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/data/d8f60a8da/10b2041eef7641d8af2a808bcb0ded2c [2022-11-02 20:22:32,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:22:32,820 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:22:32,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:22:32,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:22:32,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:22:32,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:22:32" (1/1) ... [2022-11-02 20:22:32,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64609eb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:32, skipping insertion in model container [2022-11-02 20:22:32,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:22:32" (1/1) ... [2022-11-02 20:22:32,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:22:32,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:22:33,534 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_6515a8c8-192c-4381-a845-521fc75dbde1/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i[33021,33034] [2022-11-02 20:22:33,733 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_6515a8c8-192c-4381-a845-521fc75dbde1/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i[44590,44603] [2022-11-02 20:22:33,742 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:22:33,755 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:22:33,788 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_6515a8c8-192c-4381-a845-521fc75dbde1/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i[33021,33034] [2022-11-02 20:22:33,913 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_6515a8c8-192c-4381-a845-521fc75dbde1/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i[44590,44603] [2022-11-02 20:22:33,924 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:22:33,997 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:22:33,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:33 WrapperNode [2022-11-02 20:22:33,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:22:33,999 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:22:34,000 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:22:34,000 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:22:34,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:33" (1/1) ... [2022-11-02 20:22:34,069 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:33" (1/1) ... [2022-11-02 20:22:34,179 INFO L138 Inliner]: procedures = 177, calls = 285, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1026 [2022-11-02 20:22:34,179 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:22:34,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:22:34,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:22:34,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:22:34,194 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:33" (1/1) ... [2022-11-02 20:22:34,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:33" (1/1) ... [2022-11-02 20:22:34,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:33" (1/1) ... [2022-11-02 20:22:34,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:33" (1/1) ... [2022-11-02 20:22:34,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:33" (1/1) ... [2022-11-02 20:22:34,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:33" (1/1) ... [2022-11-02 20:22:34,316 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:33" (1/1) ... [2022-11-02 20:22:34,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:33" (1/1) ... [2022-11-02 20:22:34,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:22:34,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:22:34,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:22:34,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:22:34,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:33" (1/1) ... [2022-11-02 20:22:34,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:22:34,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:34,399 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:22:34,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:22:34,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:22:34,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 20:22:34,457 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 20:22:34,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:22:34,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-02 20:22:34,459 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-02 20:22:34,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:22:34,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:22:34,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 20:22:34,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:22:34,462 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-02 20:22:34,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 20:22:34,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:22:34,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:22:34,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:22:34,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:22:34,800 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:22:34,802 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:22:36,945 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:22:36,959 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:22:36,959 INFO L300 CfgBuilder]: Removed 63 assume(true) statements. [2022-11-02 20:22:36,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:22:36 BoogieIcfgContainer [2022-11-02 20:22:36,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:22:36,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:22:36,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:22:36,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:22:36,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:22:32" (1/3) ... [2022-11-02 20:22:36,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a01de79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:22:36, skipping insertion in model container [2022-11-02 20:22:36,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:33" (2/3) ... [2022-11-02 20:22:36,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a01de79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:22:36, skipping insertion in model container [2022-11-02 20:22:36,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:22:36" (3/3) ... [2022-11-02 20:22:36,988 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test3-1.i [2022-11-02 20:22:37,019 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:22:37,019 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-02 20:22:37,094 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:22:37,102 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;@1bf04e0f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:22:37,103 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:22:37,109 INFO L276 IsEmpty]: Start isEmpty. Operand has 202 states, 189 states have (on average 1.693121693121693) internal successors, (320), 196 states have internal predecessors, (320), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:22:37,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-02 20:22:37,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:22:37,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:22:37,119 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:22:37,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:37,126 INFO L85 PathProgramCache]: Analyzing trace with hash -858857507, now seen corresponding path program 1 times [2022-11-02 20:22:37,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:37,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030569862] [2022-11-02 20:22:37,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:37,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:37,389 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 20:22:37,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:37,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030569862] [2022-11-02 20:22:37,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030569862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:22:37,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:22:37,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:22:37,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136963189] [2022-11-02 20:22:37,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:22:37,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:22:37,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:37,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:22:37,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:22:37,454 INFO L87 Difference]: Start difference. First operand has 202 states, 189 states have (on average 1.693121693121693) internal successors, (320), 196 states have internal predecessors, (320), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:37,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:22:37,552 INFO L93 Difference]: Finished difference Result 402 states and 675 transitions. [2022-11-02 20:22:37,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:22:37,558 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-02 20:22:37,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:22:37,584 INFO L225 Difference]: With dead ends: 402 [2022-11-02 20:22:37,584 INFO L226 Difference]: Without dead ends: 198 [2022-11-02 20:22:37,589 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 20:22:37,594 INFO L413 NwaCegarLoop]: 267 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, 267 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 20:22:37,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:22:37,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-02 20:22:37,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-11-02 20:22:37,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 186 states have (on average 1.3279569892473118) internal successors, (247), 192 states have internal predecessors, (247), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:22:37,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 263 transitions. [2022-11-02 20:22:37,695 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 263 transitions. Word has length 9 [2022-11-02 20:22:37,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:22:37,696 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 263 transitions. [2022-11-02 20:22:37,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:37,696 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 263 transitions. [2022-11-02 20:22:37,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 20:22:37,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:22:37,699 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:22:37,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:22:37,700 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:22:37,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:37,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1463774514, now seen corresponding path program 1 times [2022-11-02 20:22:37,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:37,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354955449] [2022-11-02 20:22:37,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:37,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:38,074 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 20:22:38,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:38,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354955449] [2022-11-02 20:22:38,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354955449] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:22:38,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:22:38,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:22:38,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278395968] [2022-11-02 20:22:38,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:22:38,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:22:38,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:38,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:22:38,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:22:38,080 INFO L87 Difference]: Start difference. First operand 198 states and 263 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:38,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:22:38,810 INFO L93 Difference]: Finished difference Result 431 states and 581 transitions. [2022-11-02 20:22:38,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:22:38,811 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 20:22:38,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:22:38,813 INFO L225 Difference]: With dead ends: 431 [2022-11-02 20:22:38,813 INFO L226 Difference]: Without dead ends: 327 [2022-11-02 20:22:38,814 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 20:22:38,816 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 158 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:22:38,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 653 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:22:38,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-11-02 20:22:38,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 200. [2022-11-02 20:22:38,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 188 states have (on average 1.324468085106383) internal successors, (249), 194 states have internal predecessors, (249), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:22:38,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 265 transitions. [2022-11-02 20:22:38,841 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 265 transitions. Word has length 14 [2022-11-02 20:22:38,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:22:38,841 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 265 transitions. [2022-11-02 20:22:38,842 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:38,842 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 265 transitions. [2022-11-02 20:22:38,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-02 20:22:38,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:22:38,845 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:22:38,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:22:38,845 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:22:38,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:38,846 INFO L85 PathProgramCache]: Analyzing trace with hash -921461318, now seen corresponding path program 1 times [2022-11-02 20:22:38,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:38,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268941092] [2022-11-02 20:22:38,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:38,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:39,093 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:22:39,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1084178691] [2022-11-02 20:22:39,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:39,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:39,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:39,108 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:39,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:22:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:40,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:22:40,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:40,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:22:40,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:40,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268941092] [2022-11-02 20:22:40,127 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:22:40,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084178691] [2022-11-02 20:22:40,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084178691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:22:40,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:22:40,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:22:40,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701959450] [2022-11-02 20:22:40,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:22:40,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:22:40,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:40,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:22:40,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:22:40,138 INFO L87 Difference]: Start difference. First operand 200 states and 265 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:40,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:22:40,256 INFO L93 Difference]: Finished difference Result 417 states and 557 transitions. [2022-11-02 20:22:40,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:22:40,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-02 20:22:40,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:22:40,260 INFO L225 Difference]: With dead ends: 417 [2022-11-02 20:22:40,261 INFO L226 Difference]: Without dead ends: 221 [2022-11-02 20:22:40,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:22:40,263 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 9 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:22:40,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 471 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:22:40,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-11-02 20:22:40,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2022-11-02 20:22:40,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 208 states have (on average 1.2932692307692308) internal successors, (269), 214 states have internal predecessors, (269), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:22:40,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 285 transitions. [2022-11-02 20:22:40,297 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 285 transitions. Word has length 66 [2022-11-02 20:22:40,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:22:40,297 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 285 transitions. [2022-11-02 20:22:40,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:40,298 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 285 transitions. [2022-11-02 20:22:40,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-02 20:22:40,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:22:40,300 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:22:40,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:22:40,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-02 20:22:40,535 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:22:40,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:40,535 INFO L85 PathProgramCache]: Analyzing trace with hash -568372936, now seen corresponding path program 1 times [2022-11-02 20:22:40,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:40,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772755459] [2022-11-02 20:22:40,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:40,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:40,736 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:22:40,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1672911423] [2022-11-02 20:22:40,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:40,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:40,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:40,739 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:40,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:22:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:41,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 1601 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:22:41,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:41,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:41,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:22:41,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:41,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772755459] [2022-11-02 20:22:41,779 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:22:41,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672911423] [2022-11-02 20:22:41,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672911423] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:22:41,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:22:41,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:22:41,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955633458] [2022-11-02 20:22:41,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:22:41,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:22:41,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:41,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:22:41,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:22:41,784 INFO L87 Difference]: Start difference. First operand 220 states and 285 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:41,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:22:41,927 INFO L93 Difference]: Finished difference Result 428 states and 558 transitions. [2022-11-02 20:22:41,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:22:41,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-02 20:22:41,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:22:41,930 INFO L225 Difference]: With dead ends: 428 [2022-11-02 20:22:41,930 INFO L226 Difference]: Without dead ends: 212 [2022-11-02 20:22:41,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 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 20:22:41,940 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 226 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:22:41,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 499 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:22:41,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-11-02 20:22:41,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 206. [2022-11-02 20:22:41,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 194 states have (on average 1.2783505154639174) internal successors, (248), 200 states have internal predecessors, (248), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:22:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 264 transitions. [2022-11-02 20:22:41,966 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 264 transitions. Word has length 66 [2022-11-02 20:22:41,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:22:41,968 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 264 transitions. [2022-11-02 20:22:41,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:41,968 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 264 transitions. [2022-11-02 20:22:41,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-02 20:22:41,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:22:41,972 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:22:42,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:22:42,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:42,179 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:22:42,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:42,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1138787002, now seen corresponding path program 1 times [2022-11-02 20:22:42,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:42,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740383199] [2022-11-02 20:22:42,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:42,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:42,358 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:22:42,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [655369516] [2022-11-02 20:22:42,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:42,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:42,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:42,369 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:42,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:22:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:43,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 1587 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:22:43,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:43,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:43,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:22:43,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:43,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740383199] [2022-11-02 20:22:43,574 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:22:43,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655369516] [2022-11-02 20:22:43,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655369516] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:22:43,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:22:43,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:22:43,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229909297] [2022-11-02 20:22:43,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:22:43,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:22:43,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:43,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:22:43,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:22:43,577 INFO L87 Difference]: Start difference. First operand 206 states and 264 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:43,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:22:43,727 INFO L93 Difference]: Finished difference Result 532 states and 686 transitions. [2022-11-02 20:22:43,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:22:43,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-02 20:22:43,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:22:43,730 INFO L225 Difference]: With dead ends: 532 [2022-11-02 20:22:43,730 INFO L226 Difference]: Without dead ends: 330 [2022-11-02 20:22:43,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:22:43,732 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 113 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:22:43,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 550 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:22:43,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-11-02 20:22:43,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 312. [2022-11-02 20:22:43,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 300 states have (on average 1.27) internal successors, (381), 306 states have internal predecessors, (381), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:22:43,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 397 transitions. [2022-11-02 20:22:43,788 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 397 transitions. Word has length 66 [2022-11-02 20:22:43,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:22:43,790 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 397 transitions. [2022-11-02 20:22:43,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:43,791 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 397 transitions. [2022-11-02 20:22:43,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-02 20:22:43,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:22:43,801 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:22:43,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:22:44,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:44,002 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:22:44,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:44,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1268606516, now seen corresponding path program 1 times [2022-11-02 20:22:44,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:44,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706951486] [2022-11-02 20:22:44,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:44,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:44,087 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:22:44,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090473918] [2022-11-02 20:22:44,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:44,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:44,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:44,093 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:44,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:22:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:44,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:22:44,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:44,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:22:44,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:22:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:22:45,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:22:45,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:45,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706951486] [2022-11-02 20:22:45,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:22:45,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090473918] [2022-11-02 20:22:45,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090473918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:22:45,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:22:45,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:22:45,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818062906] [2022-11-02 20:22:45,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:22:45,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:22:45,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:45,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:22:45,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:22:45,016 INFO L87 Difference]: Start difference. First operand 312 states and 397 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:22:45,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:22:45,531 INFO L93 Difference]: Finished difference Result 427 states and 554 transitions. [2022-11-02 20:22:45,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:22:45,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 81 [2022-11-02 20:22:45,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:22:45,535 INFO L225 Difference]: With dead ends: 427 [2022-11-02 20:22:45,535 INFO L226 Difference]: Without dead ends: 406 [2022-11-02 20:22:45,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 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 20:22:45,536 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 102 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:22:45,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 674 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:22:45,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-11-02 20:22:45,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 314. [2022-11-02 20:22:45,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 302 states have (on average 1.2682119205298013) internal successors, (383), 308 states have internal predecessors, (383), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:22:45,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 399 transitions. [2022-11-02 20:22:45,554 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 399 transitions. Word has length 81 [2022-11-02 20:22:45,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:22:45,555 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 399 transitions. [2022-11-02 20:22:45,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:22:45,556 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 399 transitions. [2022-11-02 20:22:45,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-02 20:22:45,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:22:45,559 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:22:45,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:22:45,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:22:45,779 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:22:45,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:45,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1512236935, now seen corresponding path program 1 times [2022-11-02 20:22:45,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:45,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086664388] [2022-11-02 20:22:45,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:45,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:45,849 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:22:45,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66393618] [2022-11-02 20:22:45,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:45,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:45,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:45,851 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:45,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:22:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:46,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:22:46,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:46,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:22:46,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:22:46,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:46,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086664388] [2022-11-02 20:22:46,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:22:46,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66393618] [2022-11-02 20:22:46,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66393618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:22:46,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:22:46,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:22:46,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723843709] [2022-11-02 20:22:46,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:22:46,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:22:46,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:46,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:22:46,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:22:46,793 INFO L87 Difference]: Start difference. First operand 314 states and 399 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:22:46,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:22:46,893 INFO L93 Difference]: Finished difference Result 521 states and 685 transitions. [2022-11-02 20:22:46,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:22:46,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2022-11-02 20:22:46,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:22:46,896 INFO L225 Difference]: With dead ends: 521 [2022-11-02 20:22:46,896 INFO L226 Difference]: Without dead ends: 356 [2022-11-02 20:22:46,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:22:46,898 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 8 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:22:46,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 459 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:22:46,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-11-02 20:22:46,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 354. [2022-11-02 20:22:46,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 342 states have (on average 1.236842105263158) internal successors, (423), 348 states have internal predecessors, (423), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:22:46,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 439 transitions. [2022-11-02 20:22:46,915 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 439 transitions. Word has length 111 [2022-11-02 20:22:46,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:22:46,916 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 439 transitions. [2022-11-02 20:22:46,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:22:46,917 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 439 transitions. [2022-11-02 20:22:46,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-02 20:22:46,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:22:46,919 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:22:46,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:22:47,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:47,134 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:22:47,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:47,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1771613111, now seen corresponding path program 1 times [2022-11-02 20:22:47,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:47,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215780050] [2022-11-02 20:22:47,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:47,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:47,208 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:22:47,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98821942] [2022-11-02 20:22:47,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:47,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:47,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:47,210 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:47,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:22:48,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:48,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:22:48,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:22:48,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:22:48,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:48,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215780050] [2022-11-02 20:22:48,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:22:48,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98821942] [2022-11-02 20:22:48,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98821942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:22:48,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:22:48,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:22:48,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905585233] [2022-11-02 20:22:48,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:22:48,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:22:48,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:48,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:22:48,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:22:48,171 INFO L87 Difference]: Start difference. First operand 354 states and 439 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:22:48,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:22:48,304 INFO L93 Difference]: Finished difference Result 536 states and 680 transitions. [2022-11-02 20:22:48,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:22:48,305 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2022-11-02 20:22:48,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:22:48,308 INFO L225 Difference]: With dead ends: 536 [2022-11-02 20:22:48,308 INFO L226 Difference]: Without dead ends: 331 [2022-11-02 20:22:48,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:22:48,310 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 104 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:22:48,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 802 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:22:48,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-02 20:22:48,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 326. [2022-11-02 20:22:48,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 314 states have (on average 1.213375796178344) internal successors, (381), 320 states have internal predecessors, (381), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:22:48,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 397 transitions. [2022-11-02 20:22:48,331 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 397 transitions. Word has length 111 [2022-11-02 20:22:48,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:22:48,333 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 397 transitions. [2022-11-02 20:22:48,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:22:48,334 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 397 transitions. [2022-11-02 20:22:48,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-02 20:22:48,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:22:48,340 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:22:48,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:22:48,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:48,554 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:22:48,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:48,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1365745725, now seen corresponding path program 1 times [2022-11-02 20:22:48,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:48,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981241550] [2022-11-02 20:22:48,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:48,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:48,626 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:22:48,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298293536] [2022-11-02 20:22:48,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:48,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:48,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:48,628 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:48,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:22:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:49,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:22:49,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:22:49,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:22:49,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:49,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981241550] [2022-11-02 20:22:49,778 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:22:49,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298293536] [2022-11-02 20:22:49,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298293536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:22:49,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:22:49,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:22:49,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623112007] [2022-11-02 20:22:49,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:22:49,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:22:49,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:49,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:22:49,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:22:49,782 INFO L87 Difference]: Start difference. First operand 326 states and 397 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:22:50,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:22:50,199 INFO L93 Difference]: Finished difference Result 720 states and 898 transitions. [2022-11-02 20:22:50,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:22:50,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2022-11-02 20:22:50,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:22:50,203 INFO L225 Difference]: With dead ends: 720 [2022-11-02 20:22:50,203 INFO L226 Difference]: Without dead ends: 442 [2022-11-02 20:22:50,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 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 20:22:50,205 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 446 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:22:50,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 508 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:22:50,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-11-02 20:22:50,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 410. [2022-11-02 20:22:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 398 states have (on average 1.2185929648241205) internal successors, (485), 404 states have internal predecessors, (485), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:22:50,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 501 transitions. [2022-11-02 20:22:50,266 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 501 transitions. Word has length 111 [2022-11-02 20:22:50,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:22:50,267 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 501 transitions. [2022-11-02 20:22:50,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:22:50,268 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 501 transitions. [2022-11-02 20:22:50,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-02 20:22:50,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:22:50,270 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:22:50,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:22:50,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:50,496 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:22:50,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:50,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1916658931, now seen corresponding path program 1 times [2022-11-02 20:22:50,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:50,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140368832] [2022-11-02 20:22:50,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:50,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:50,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:22:50,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089937704] [2022-11-02 20:22:50,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:50,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:50,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:50,571 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:50,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:23:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:11,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:11,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:11,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:11,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:11,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140368832] [2022-11-02 20:23:11,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:23:11,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089937704] [2022-11-02 20:23:11,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089937704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:11,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:11,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:11,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434886678] [2022-11-02 20:23:11,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:11,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:11,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:11,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:11,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:11,125 INFO L87 Difference]: Start difference. First operand 410 states and 501 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:23:11,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:11,195 INFO L93 Difference]: Finished difference Result 772 states and 951 transitions. [2022-11-02 20:23:11,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:23:11,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 118 [2022-11-02 20:23:11,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:11,203 INFO L225 Difference]: With dead ends: 772 [2022-11-02 20:23:11,203 INFO L226 Difference]: Without dead ends: 413 [2022-11-02 20:23:11,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 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 20:23:11,205 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 2 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:11,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 734 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:11,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-11-02 20:23:11,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 413. [2022-11-02 20:23:11,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 400 states have (on average 1.22) internal successors, (488), 407 states have internal predecessors, (488), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-02 20:23:11,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 505 transitions. [2022-11-02 20:23:11,255 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 505 transitions. Word has length 118 [2022-11-02 20:23:11,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:11,256 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 505 transitions. [2022-11-02 20:23:11,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:23:11,256 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 505 transitions. [2022-11-02 20:23:11,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-02 20:23:11,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:11,259 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:11,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:11,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:23:11,475 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:11,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:11,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1353137643, now seen corresponding path program 1 times [2022-11-02 20:23:11,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:11,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24403910] [2022-11-02 20:23:11,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:11,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:11,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:23:11,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180473448] [2022-11-02 20:23:11,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:11,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:23:11,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:23:11,558 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:23:11,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:24:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:10,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:24:10,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:24:10,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:24:10,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:24:10,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24403910] [2022-11-02 20:24:10,390 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:24:10,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180473448] [2022-11-02 20:24:10,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180473448] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:10,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:24:10,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-02 20:24:10,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570061276] [2022-11-02 20:24:10,392 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:10,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:24:10,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:24:10,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:24:10,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:24:10,393 INFO L87 Difference]: Start difference. First operand 413 states and 505 transitions. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:24:10,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:10,576 INFO L93 Difference]: Finished difference Result 786 states and 973 transitions. [2022-11-02 20:24:10,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:24:10,577 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 120 [2022-11-02 20:24:10,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:10,579 INFO L225 Difference]: With dead ends: 786 [2022-11-02 20:24:10,580 INFO L226 Difference]: Without dead ends: 424 [2022-11-02 20:24:10,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:24:10,581 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 15 mSDsluCounter, 1214 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:10,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1460 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:24:10,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-11-02 20:24:10,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 422. [2022-11-02 20:24:10,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 408 states have (on average 1.2303921568627452) internal successors, (502), 415 states have internal predecessors, (502), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (10), 4 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-02 20:24:10,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 520 transitions. [2022-11-02 20:24:10,607 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 520 transitions. Word has length 120 [2022-11-02 20:24:10,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:10,607 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 520 transitions. [2022-11-02 20:24:10,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:24:10,608 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 520 transitions. [2022-11-02 20:24:10,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-02 20:24:10,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:10,610 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:24:10,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:24:10,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:24:10,835 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:10,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:10,835 INFO L85 PathProgramCache]: Analyzing trace with hash 624699891, now seen corresponding path program 2 times [2022-11-02 20:24:10,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:24:10,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334472463] [2022-11-02 20:24:10,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:10,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:24:10,907 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:24:10,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080363460] [2022-11-02 20:24:10,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:24:10,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:24:10,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:24:10,909 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:24:10,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:26:55,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:26:55,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:26:55,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:26:55,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:26:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 20:26:55,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:26:55,689 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:26:55,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:55,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334472463] [2022-11-02 20:26:55,690 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:26:55,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080363460] [2022-11-02 20:26:55,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080363460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:26:55,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:26:55,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2022-11-02 20:26:55,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873319449] [2022-11-02 20:26:55,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:26:55,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:26:55,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:55,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:26:55,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:26:55,693 INFO L87 Difference]: Start difference. First operand 422 states and 520 transitions. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:26:56,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:26:56,247 INFO L93 Difference]: Finished difference Result 799 states and 991 transitions. [2022-11-02 20:26:56,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:26:56,248 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 124 [2022-11-02 20:26:56,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:26:56,252 INFO L225 Difference]: With dead ends: 799 [2022-11-02 20:26:56,252 INFO L226 Difference]: Without dead ends: 428 [2022-11-02 20:26:56,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:26:56,254 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 29 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:26:56,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 1442 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:26:56,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-11-02 20:26:56,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 426. [2022-11-02 20:26:56,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 412 states have (on average 1.2281553398058251) internal successors, (506), 419 states have internal predecessors, (506), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-02 20:26:56,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 523 transitions. [2022-11-02 20:26:56,284 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 523 transitions. Word has length 124 [2022-11-02 20:26:56,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:26:56,284 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 523 transitions. [2022-11-02 20:26:56,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:26:56,285 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 523 transitions. [2022-11-02 20:26:56,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-02 20:26:56,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:26:56,287 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:26:56,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:26:56,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:26:56,503 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:26:56,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:56,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1185103091, now seen corresponding path program 3 times [2022-11-02 20:26:56,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:56,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694339078] [2022-11-02 20:26:56,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:56,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:56,580 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:26:56,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439053817] [2022-11-02 20:26:56,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:26:56,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:56,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:26:56,582 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:26:56,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6515a8c8-192c-4381-a845-521fc75dbde1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process