./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8 --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 cb182062e759f3e947e2f86847df2222bda90081d4cc013a50b9baa2d9844063 --- 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-e04fb08 [2022-11-16 12:27:25,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:27:25,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:27:25,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:27:25,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:27:25,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:27:25,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:27:25,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:27:25,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:27:25,264 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:27:25,265 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:27:25,266 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:27:25,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:27:25,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:27:25,269 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:27:25,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:27:25,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:27:25,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:27:25,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:27:25,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:27:25,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:27:25,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:27:25,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:27:25,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:27:25,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:27:25,297 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:27:25,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:27:25,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:27:25,299 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:27:25,300 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:27:25,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:27:25,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:27:25,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:27:25,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:27:25,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:27:25,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:27:25,305 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:27:25,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:27:25,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:27:25,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:27:25,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:27:25,314 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:27:25,358 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:27:25,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:27:25,363 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:27:25,363 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:27:25,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:27:25,364 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:27:25,365 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:27:25,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:27:25,365 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:27:25,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:27:25,366 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:27:25,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:27:25,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:27:25,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:27:25,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:27:25,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:27:25,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:27:25,367 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:27:25,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:27:25,368 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:27:25,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:27:25,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:27:25,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:27:25,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:27:25,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:27:25,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:27:25,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:27:25,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:27:25,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:27:25,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:27:25,372 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:27:25,372 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:27:25,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:27:25,372 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_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb182062e759f3e947e2f86847df2222bda90081d4cc013a50b9baa2d9844063 [2022-11-16 12:27:25,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:27:25,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:27:25,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:27:25,688 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:27:25,689 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:27:25,690 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-3.i [2022-11-16 12:27:25,780 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/data/4336762b5/23c7c9ec70a54525b8d199a947d884ec/FLAG67f466adf [2022-11-16 12:27:26,377 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:27:26,377 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-3.i [2022-11-16 12:27:26,401 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/data/4336762b5/23c7c9ec70a54525b8d199a947d884ec/FLAG67f466adf [2022-11-16 12:27:26,623 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/data/4336762b5/23c7c9ec70a54525b8d199a947d884ec [2022-11-16 12:27:26,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:27:26,627 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:27:26,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:27:26,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:27:26,641 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:27:26,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:27:26" (1/1) ... [2022-11-16 12:27:26,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d2a22b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:26, skipping insertion in model container [2022-11-16 12:27:26,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:27:26" (1/1) ... [2022-11-16 12:27:26,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:27:26,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:27:27,268 WARN L229 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_88cd3aef-7dda-46d3-9035-e9daf35065b4/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-3.i[33021,33034] [2022-11-16 12:27:27,414 WARN L229 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_88cd3aef-7dda-46d3-9035-e9daf35065b4/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-3.i[49681,49694] [2022-11-16 12:27:27,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:27:27,450 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:27:27,482 WARN L229 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_88cd3aef-7dda-46d3-9035-e9daf35065b4/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-3.i[33021,33034] [2022-11-16 12:27:27,594 WARN L229 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_88cd3aef-7dda-46d3-9035-e9daf35065b4/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-3.i[49681,49694] [2022-11-16 12:27:27,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:27:27,686 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:27:27,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:27 WrapperNode [2022-11-16 12:27:27,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:27:27,688 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:27:27,688 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:27:27,688 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:27:27,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:27" (1/1) ... [2022-11-16 12:27:27,737 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:27" (1/1) ... [2022-11-16 12:27:27,847 INFO L138 Inliner]: procedures = 177, calls = 487, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1686 [2022-11-16 12:27:27,848 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:27:27,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:27:27,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:27:27,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:27:27,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:27" (1/1) ... [2022-11-16 12:27:27,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:27" (1/1) ... [2022-11-16 12:27:27,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:27" (1/1) ... [2022-11-16 12:27:27,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:27" (1/1) ... [2022-11-16 12:27:28,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:27" (1/1) ... [2022-11-16 12:27:28,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:27" (1/1) ... [2022-11-16 12:27:28,048 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:27" (1/1) ... [2022-11-16 12:27:28,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:27" (1/1) ... [2022-11-16 12:27:28,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:27:28,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:27:28,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:27:28,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:27:28,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:27" (1/1) ... [2022-11-16 12:27:28,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:27:28,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:27:28,103 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:27:28,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:27:28,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:27:28,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 12:27:28,153 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 12:27:28,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:27:28,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-16 12:27:28,155 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-16 12:27:28,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:27:28,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:27:28,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 12:27:28,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:27:28,156 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-16 12:27:28,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 12:27:28,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:27:28,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:27:28,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:27:28,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:27:28,499 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:27:28,516 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:27:30,777 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:27:30,796 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:27:30,796 INFO L300 CfgBuilder]: Removed 100 assume(true) statements. [2022-11-16 12:27:30,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:27:30 BoogieIcfgContainer [2022-11-16 12:27:30,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:27:30,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:27:30,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:27:30,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:27:30,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:27:26" (1/3) ... [2022-11-16 12:27:30,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b16042d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:27:30, skipping insertion in model container [2022-11-16 12:27:30,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:27" (2/3) ... [2022-11-16 12:27:30,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b16042d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:27:30, skipping insertion in model container [2022-11-16 12:27:30,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:27:30" (3/3) ... [2022-11-16 12:27:30,816 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test5-3.i [2022-11-16 12:27:30,847 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:27:30,848 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-16 12:27:30,906 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:27:30,913 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;@fd2e6fb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:27:30,913 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:27:30,925 INFO L276 IsEmpty]: Start isEmpty. Operand has 304 states, 288 states have (on average 1.7048611111111112) internal successors, (491), 295 states have internal predecessors, (491), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-16 12:27:30,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:27:30,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:27:30,933 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:30,936 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:27:30,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:30,944 INFO L85 PathProgramCache]: Analyzing trace with hash 678032416, now seen corresponding path program 1 times [2022-11-16 12:27:30,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:30,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138326897] [2022-11-16 12:27:30,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:30,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:31,107 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:27:31,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933016898] [2022-11-16 12:27:31,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:31,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:31,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:27:31,114 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:27:31,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:27:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:31,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-16 12:27:31,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:27:31,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:27:31,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:27:31,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:31,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138326897] [2022-11-16 12:27:31,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:27:31,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933016898] [2022-11-16 12:27:31,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933016898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:27:31,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:27:31,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:27:31,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072689248] [2022-11-16 12:27:31,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:27:31,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:27:31,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:31,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:27:31,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:27:31,468 INFO L87 Difference]: Start difference. First operand has 304 states, 288 states have (on average 1.7048611111111112) internal successors, (491), 295 states have internal predecessors, (491), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:31,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:27:31,557 INFO L93 Difference]: Finished difference Result 606 states and 1029 transitions. [2022-11-16 12:27:31,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:27:31,561 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-11-16 12:27:31,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:27:31,581 INFO L225 Difference]: With dead ends: 606 [2022-11-16 12:27:31,581 INFO L226 Difference]: Without dead ends: 250 [2022-11-16 12:27:31,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:27:31,595 INFO L413 NwaCegarLoop]: 404 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, 404 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 [2022-11-16 12:27:31,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:27:31,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-16 12:27:31,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2022-11-16 12:27:31,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 235 states have (on average 1.3148936170212766) internal successors, (309), 241 states have internal predecessors, (309), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-16 12:27:31,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 331 transitions. [2022-11-16 12:27:31,675 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 331 transitions. Word has length 8 [2022-11-16 12:27:31,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:27:31,676 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 331 transitions. [2022-11-16 12:27:31,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:31,677 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 331 transitions. [2022-11-16 12:27:31,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 12:27:31,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:27:31,680 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:31,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:27:31,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-16 12:27:31,885 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:27:31,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:31,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1368100487, now seen corresponding path program 1 times [2022-11-16 12:27:31,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:31,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657075488] [2022-11-16 12:27:31,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:31,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:31,942 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:27:31,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756362220] [2022-11-16 12:27:31,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:31,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:31,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:27:31,950 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:27:31,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:27:32,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:32,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:27:32,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:27:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:27:32,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:27:32,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:32,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657075488] [2022-11-16 12:27:32,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:27:32,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756362220] [2022-11-16 12:27:32,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756362220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:27:32,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:27:32,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:27:32,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35761316] [2022-11-16 12:27:32,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:27:32,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:27:32,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:32,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:27:32,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:27:32,246 INFO L87 Difference]: Start difference. First operand 250 states and 331 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:32,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:27:32,303 INFO L93 Difference]: Finished difference Result 565 states and 756 transitions. [2022-11-16 12:27:32,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:27:32,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-16 12:27:32,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:27:32,308 INFO L225 Difference]: With dead ends: 565 [2022-11-16 12:27:32,310 INFO L226 Difference]: Without dead ends: 487 [2022-11-16 12:27:32,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:27:32,312 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 294 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:27:32,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 686 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:27:32,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-11-16 12:27:32,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 251. [2022-11-16 12:27:32,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 236 states have (on average 1.3135593220338984) internal successors, (310), 242 states have internal predecessors, (310), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-16 12:27:32,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 332 transitions. [2022-11-16 12:27:32,340 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 332 transitions. Word has length 42 [2022-11-16 12:27:32,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:27:32,343 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 332 transitions. [2022-11-16 12:27:32,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:32,344 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 332 transitions. [2022-11-16 12:27:32,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-16 12:27:32,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:27:32,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:32,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:27:32,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:32,568 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:27:32,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:32,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1909784615, now seen corresponding path program 1 times [2022-11-16 12:27:32,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:32,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71910721] [2022-11-16 12:27:32,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:32,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:32,890 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:27:32,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974812927] [2022-11-16 12:27:32,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:32,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:32,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:27:32,897 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:27:32,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:27:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:34,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 3071 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:27:34,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:27:34,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:27:34,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:27:34,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:34,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71910721] [2022-11-16 12:27:34,314 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:27:34,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974812927] [2022-11-16 12:27:34,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974812927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:27:34,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:27:34,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:27:34,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819177529] [2022-11-16 12:27:34,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:27:34,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:27:34,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:34,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:27:34,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:27:34,318 INFO L87 Difference]: Start difference. First operand 251 states and 332 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:34,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:27:34,425 INFO L93 Difference]: Finished difference Result 520 states and 692 transitions. [2022-11-16 12:27:34,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:27:34,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2022-11-16 12:27:34,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:27:34,428 INFO L225 Difference]: With dead ends: 520 [2022-11-16 12:27:34,428 INFO L226 Difference]: Without dead ends: 272 [2022-11-16 12:27:34,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:27:34,433 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 9 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 607 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 [2022-11-16 12:27:34,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 607 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:27:34,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-16 12:27:34,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2022-11-16 12:27:34,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 256 states have (on average 1.2890625) internal successors, (330), 262 states have internal predecessors, (330), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-16 12:27:34,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 352 transitions. [2022-11-16 12:27:34,478 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 352 transitions. Word has length 140 [2022-11-16 12:27:34,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:27:34,478 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 352 transitions. [2022-11-16 12:27:34,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:34,479 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 352 transitions. [2022-11-16 12:27:34,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-16 12:27:34,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:27:34,481 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:34,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:27:34,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:34,693 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:27:34,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:34,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1480126309, now seen corresponding path program 1 times [2022-11-16 12:27:34,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:34,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475469204] [2022-11-16 12:27:34,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:34,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:34,996 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:27:34,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484855780] [2022-11-16 12:27:34,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:34,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:34,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:27:35,000 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:27:35,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:27:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:36,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 3073 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:27:36,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:27:36,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:27:36,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:27:36,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:36,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475469204] [2022-11-16 12:27:36,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:27:36,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484855780] [2022-11-16 12:27:36,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484855780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:27:36,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:27:36,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:27:36,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152407778] [2022-11-16 12:27:36,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:27:36,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:27:36,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:36,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:27:36,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:27:36,507 INFO L87 Difference]: Start difference. First operand 271 states and 352 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:36,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:27:36,621 INFO L93 Difference]: Finished difference Result 560 states and 732 transitions. [2022-11-16 12:27:36,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:27:36,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2022-11-16 12:27:36,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:27:36,627 INFO L225 Difference]: With dead ends: 560 [2022-11-16 12:27:36,632 INFO L226 Difference]: Without dead ends: 292 [2022-11-16 12:27:36,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:27:36,636 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 10 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 607 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 [2022-11-16 12:27:36,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 607 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:27:36,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-11-16 12:27:36,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2022-11-16 12:27:36,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 276 states have (on average 1.2681159420289856) internal successors, (350), 282 states have internal predecessors, (350), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-16 12:27:36,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 372 transitions. [2022-11-16 12:27:36,653 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 372 transitions. Word has length 140 [2022-11-16 12:27:36,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:27:36,654 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 372 transitions. [2022-11-16 12:27:36,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:36,655 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 372 transitions. [2022-11-16 12:27:36,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-16 12:27:36,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:27:36,659 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:36,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:27:36,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:36,883 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:27:36,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:36,884 INFO L85 PathProgramCache]: Analyzing trace with hash -4891625, now seen corresponding path program 1 times [2022-11-16 12:27:36,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:36,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942441554] [2022-11-16 12:27:36,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:36,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:37,122 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:27:37,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412076239] [2022-11-16 12:27:37,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:37,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:37,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:27:37,124 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:27:37,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:27:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:38,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 3077 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:27:38,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:27:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:27:38,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:27:38,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:38,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942441554] [2022-11-16 12:27:38,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:27:38,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412076239] [2022-11-16 12:27:38,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412076239] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:27:38,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:27:38,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:27:38,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045604420] [2022-11-16 12:27:38,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:27:38,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:27:38,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:38,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:27:38,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:27:38,875 INFO L87 Difference]: Start difference. First operand 291 states and 372 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:38,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:27:38,981 INFO L93 Difference]: Finished difference Result 389 states and 508 transitions. [2022-11-16 12:27:38,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:27:38,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2022-11-16 12:27:38,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:27:38,990 INFO L225 Difference]: With dead ends: 389 [2022-11-16 12:27:38,990 INFO L226 Difference]: Without dead ends: 312 [2022-11-16 12:27:38,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:27:38,991 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 9 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 607 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 [2022-11-16 12:27:38,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 607 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:27:38,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-16 12:27:38,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 311. [2022-11-16 12:27:39,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 296 states have (on average 1.25) internal successors, (370), 302 states have internal predecessors, (370), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-16 12:27:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 392 transitions. [2022-11-16 12:27:39,002 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 392 transitions. Word has length 140 [2022-11-16 12:27:39,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:27:39,003 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 392 transitions. [2022-11-16 12:27:39,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:39,004 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 392 transitions. [2022-11-16 12:27:39,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-16 12:27:39,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:27:39,011 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:39,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:27:39,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:39,211 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:27:39,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:39,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1989253081, now seen corresponding path program 1 times [2022-11-16 12:27:39,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:39,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500465762] [2022-11-16 12:27:39,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:39,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:39,455 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:27:39,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701834894] [2022-11-16 12:27:39,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:39,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:39,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:27:39,458 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:27:39,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:27:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:41,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 3079 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:27:41,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:27:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:27:41,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:27:41,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:41,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500465762] [2022-11-16 12:27:41,314 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:27:41,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701834894] [2022-11-16 12:27:41,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701834894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:27:41,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:27:41,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:27:41,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868675113] [2022-11-16 12:27:41,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:27:41,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:27:41,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:41,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:27:41,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:27:41,317 INFO L87 Difference]: Start difference. First operand 311 states and 392 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:41,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:27:41,402 INFO L93 Difference]: Finished difference Result 611 states and 773 transitions. [2022-11-16 12:27:41,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:27:41,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2022-11-16 12:27:41,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:27:41,405 INFO L225 Difference]: With dead ends: 611 [2022-11-16 12:27:41,405 INFO L226 Difference]: Without dead ends: 303 [2022-11-16 12:27:41,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:27:41,406 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 295 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:27:41,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 635 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:27:41,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-11-16 12:27:41,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 297. [2022-11-16 12:27:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 282 states have (on average 1.2375886524822695) internal successors, (349), 288 states have internal predecessors, (349), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-16 12:27:41,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 371 transitions. [2022-11-16 12:27:41,418 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 371 transitions. Word has length 140 [2022-11-16 12:27:41,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:27:41,418 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 371 transitions. [2022-11-16 12:27:41,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:41,419 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 371 transitions. [2022-11-16 12:27:41,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-16 12:27:41,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:27:41,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:41,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:27:41,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 12:27:41,643 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:27:41,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:41,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1906468619, now seen corresponding path program 1 times [2022-11-16 12:27:41,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:41,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428700126] [2022-11-16 12:27:41,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:41,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:41,890 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:27:41,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173829059] [2022-11-16 12:27:41,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:41,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:41,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:27:41,898 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:27:41,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:27:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:43,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 3065 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:27:43,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:27:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:27:43,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:27:43,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:43,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428700126] [2022-11-16 12:27:43,986 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:27:43,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173829059] [2022-11-16 12:27:43,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173829059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:27:43,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:27:43,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:27:43,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130045135] [2022-11-16 12:27:43,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:27:43,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:27:43,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:43,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:27:43,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:27:43,989 INFO L87 Difference]: Start difference. First operand 297 states and 371 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:44,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:27:44,077 INFO L93 Difference]: Finished difference Result 670 states and 837 transitions. [2022-11-16 12:27:44,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:27:44,078 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2022-11-16 12:27:44,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:27:44,081 INFO L225 Difference]: With dead ends: 670 [2022-11-16 12:27:44,081 INFO L226 Difference]: Without dead ends: 376 [2022-11-16 12:27:44,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:27:44,083 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 288 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:27:44,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 869 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:27:44,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-11-16 12:27:44,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 283. [2022-11-16 12:27:44,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 268 states have (on average 1.2238805970149254) internal successors, (328), 274 states have internal predecessors, (328), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-16 12:27:44,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 350 transitions. [2022-11-16 12:27:44,100 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 350 transitions. Word has length 140 [2022-11-16 12:27:44,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:27:44,101 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 350 transitions. [2022-11-16 12:27:44,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:44,102 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 350 transitions. [2022-11-16 12:27:44,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-16 12:27:44,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:27:44,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:44,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:27:44,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:44,324 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:27:44,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:44,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1296503321, now seen corresponding path program 1 times [2022-11-16 12:27:44,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:44,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677461396] [2022-11-16 12:27:44,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:44,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:44,628 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:27:44,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680724419] [2022-11-16 12:27:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:44,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:44,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:27:44,631 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:27:44,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:27:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:46,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 3051 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:27:46,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:27:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:27:46,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:27:46,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:46,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677461396] [2022-11-16 12:27:46,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:27:46,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680724419] [2022-11-16 12:27:46,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680724419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:27:46,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:27:46,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:27:46,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605739768] [2022-11-16 12:27:46,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:27:46,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:27:46,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:46,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:27:46,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:27:46,787 INFO L87 Difference]: Start difference. First operand 283 states and 350 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:46,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:27:46,868 INFO L93 Difference]: Finished difference Result 371 states and 466 transitions. [2022-11-16 12:27:46,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:27:46,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2022-11-16 12:27:46,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:27:46,871 INFO L225 Difference]: With dead ends: 371 [2022-11-16 12:27:46,871 INFO L226 Difference]: Without dead ends: 274 [2022-11-16 12:27:46,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:27:46,872 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 88 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:27:46,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 801 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:27:46,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-16 12:27:46,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 269. [2022-11-16 12:27:46,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 254 states have (on average 1.2086614173228347) internal successors, (307), 260 states have internal predecessors, (307), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-16 12:27:46,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 329 transitions. [2022-11-16 12:27:46,882 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 329 transitions. Word has length 140 [2022-11-16 12:27:46,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:27:46,883 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 329 transitions. [2022-11-16 12:27:46,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:46,883 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 329 transitions. [2022-11-16 12:27:46,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-16 12:27:46,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:27:46,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:46,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:27:47,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:47,101 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:27:47,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:47,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1580490231, now seen corresponding path program 1 times [2022-11-16 12:27:47,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:47,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484001896] [2022-11-16 12:27:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:47,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:47,376 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:27:47,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610595333] [2022-11-16 12:27:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:47,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:47,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:27:47,386 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:27:47,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:27:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:49,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 3035 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:27:49,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:27:49,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:27:49,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:27:49,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:49,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484001896] [2022-11-16 12:27:49,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:27:49,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610595333] [2022-11-16 12:27:49,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610595333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:27:49,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:27:49,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:27:49,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425199574] [2022-11-16 12:27:49,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:27:49,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:27:49,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:49,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:27:49,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:27:49,628 INFO L87 Difference]: Start difference. First operand 269 states and 329 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:49,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:27:49,699 INFO L93 Difference]: Finished difference Result 347 states and 425 transitions. [2022-11-16 12:27:49,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:27:49,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2022-11-16 12:27:49,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:27:49,701 INFO L225 Difference]: With dead ends: 347 [2022-11-16 12:27:49,702 INFO L226 Difference]: Without dead ends: 264 [2022-11-16 12:27:49,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:27:49,703 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 63 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:27:49,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 795 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:27:49,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-16 12:27:49,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 260. [2022-11-16 12:27:49,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 245 states have (on average 1.1959183673469387) internal successors, (293), 251 states have internal predecessors, (293), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-16 12:27:49,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 315 transitions. [2022-11-16 12:27:49,715 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 315 transitions. Word has length 140 [2022-11-16 12:27:49,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:27:49,715 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 315 transitions. [2022-11-16 12:27:49,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:49,716 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 315 transitions. [2022-11-16 12:27:49,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-16 12:27:49,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:27:49,718 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:49,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:27:49,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:49,935 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:27:49,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:49,935 INFO L85 PathProgramCache]: Analyzing trace with hash 413654475, now seen corresponding path program 1 times [2022-11-16 12:27:49,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:49,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190708116] [2022-11-16 12:27:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:49,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:50,183 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:27:50,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192841091] [2022-11-16 12:27:50,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:50,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:50,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:27:50,202 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:27:50,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:27:52,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:52,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 3037 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:27:52,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:27:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:27:52,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:27:52,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:27:52,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:52,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190708116] [2022-11-16 12:27:52,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:27:52,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192841091] [2022-11-16 12:27:52,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192841091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:27:52,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:27:52,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-16 12:27:52,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948989153] [2022-11-16 12:27:52,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:27:52,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:27:52,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:52,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:27:52,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:27:52,960 INFO L87 Difference]: Start difference. First operand 260 states and 315 transitions. Second operand has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:53,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:27:53,173 INFO L93 Difference]: Finished difference Result 1005 states and 1227 transitions. [2022-11-16 12:27:53,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:27:53,174 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 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 140 [2022-11-16 12:27:53,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:27:53,180 INFO L225 Difference]: With dead ends: 1005 [2022-11-16 12:27:53,181 INFO L226 Difference]: Without dead ends: 930 [2022-11-16 12:27:53,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:27:53,182 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 1603 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1642 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:27:53,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1642 Valid, 1173 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:27:53,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-11-16 12:27:53,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 794. [2022-11-16 12:27:53,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 761 states have (on average 1.1892247043363995) internal successors, (905), 767 states have internal predecessors, (905), 29 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 25 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-16 12:27:53,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 963 transitions. [2022-11-16 12:27:53,223 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 963 transitions. Word has length 140 [2022-11-16 12:27:53,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:27:53,224 INFO L495 AbstractCegarLoop]: Abstraction has 794 states and 963 transitions. [2022-11-16 12:27:53,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:53,224 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 963 transitions. [2022-11-16 12:27:53,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2022-11-16 12:27:53,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:27:53,234 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:53,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:27:53,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:53,456 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:27:53,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:53,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1488887653, now seen corresponding path program 2 times [2022-11-16 12:27:53,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:53,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703201572] [2022-11-16 12:27:53,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:53,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:54,222 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:27:54,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982861889] [2022-11-16 12:27:54,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:27:54,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:54,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:27:54,226 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:27:54,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:27:59,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:27:59,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:27:59,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 11749 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:27:59,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:28:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 0 proven. 592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:00,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:28:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 0 proven. 592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:01,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:28:01,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703201572] [2022-11-16 12:28:01,098 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:28:01,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982861889] [2022-11-16 12:28:01,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982861889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:28:01,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:28:01,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-16 12:28:01,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580995181] [2022-11-16 12:28:01,099 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:28:01,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:28:01,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:28:01,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:28:01,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:28:01,102 INFO L87 Difference]: Start difference. First operand 794 states and 963 transitions. Second operand has 12 states, 12 states have (on average 69.0) internal successors, (828), 12 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:28:01,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:01,588 INFO L93 Difference]: Finished difference Result 2277 states and 2781 transitions. [2022-11-16 12:28:01,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:28:01,594 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 69.0) internal successors, (828), 12 states have internal predecessors, (828), 0 states have call successors, (0), 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 434 [2022-11-16 12:28:01,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:01,604 INFO L225 Difference]: With dead ends: 2277 [2022-11-16 12:28:01,604 INFO L226 Difference]: Without dead ends: 2202 [2022-11-16 12:28:01,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 866 GetRequests, 856 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:28:01,606 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 3189 mSDsluCounter, 2543 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3279 SdHoareTripleChecker+Valid, 3000 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:01,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3279 Valid, 3000 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:28:01,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2022-11-16 12:28:01,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1862. [2022-11-16 12:28:01,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1793 states have (on average 1.1873954266592304) internal successors, (2129), 1799 states have internal predecessors, (2129), 65 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (65), 61 states have call predecessors, (65), 65 states have call successors, (65) [2022-11-16 12:28:01,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 2259 transitions. [2022-11-16 12:28:01,740 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 2259 transitions. Word has length 434 [2022-11-16 12:28:01,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:01,741 INFO L495 AbstractCegarLoop]: Abstraction has 1862 states and 2259 transitions. [2022-11-16 12:28:01,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 69.0) internal successors, (828), 12 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:28:01,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 2259 transitions. [2022-11-16 12:28:01,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1023 [2022-11-16 12:28:01,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:01,782 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:28:01,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:28:02,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:02,006 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:28:02,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:02,007 INFO L85 PathProgramCache]: Analyzing trace with hash -268896231, now seen corresponding path program 3 times [2022-11-16 12:28:02,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:28:02,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912025464] [2022-11-16 12:28:02,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:02,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:28:03,762 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:28:03,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992582758] [2022-11-16 12:28:03,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:28:03,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:03,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:28:03,764 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:28:03,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:28:10,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:28:10,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:28:10,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 3037 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:28:10,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:28:14,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4420 backedges. 568 proven. 0 refuted. 0 times theorem prover too weak. 3852 trivial. 0 not checked. [2022-11-16 12:28:14,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:28:14,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:28:14,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912025464] [2022-11-16 12:28:14,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:28:14,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992582758] [2022-11-16 12:28:14,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992582758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:28:14,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:28:14,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:28:14,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398433479] [2022-11-16 12:28:14,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:28:14,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:28:14,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:28:14,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:28:14,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:28:14,566 INFO L87 Difference]: Start difference. First operand 1862 states and 2259 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:28:14,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:14,671 INFO L93 Difference]: Finished difference Result 3666 states and 4452 transitions. [2022-11-16 12:28:14,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:28:14,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 1022 [2022-11-16 12:28:14,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:14,680 INFO L225 Difference]: With dead ends: 3666 [2022-11-16 12:28:14,680 INFO L226 Difference]: Without dead ends: 1860 [2022-11-16 12:28:14,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 1020 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:28:14,684 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 15 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:14,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 587 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:28:14,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2022-11-16 12:28:14,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1860. [2022-11-16 12:28:14,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1791 states have (on average 1.1870463428252374) internal successors, (2126), 1797 states have internal predecessors, (2126), 65 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (65), 61 states have call predecessors, (65), 65 states have call successors, (65) [2022-11-16 12:28:14,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 2256 transitions. [2022-11-16 12:28:14,750 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 2256 transitions. Word has length 1022 [2022-11-16 12:28:14,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:14,751 INFO L495 AbstractCegarLoop]: Abstraction has 1860 states and 2256 transitions. [2022-11-16 12:28:14,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:28:14,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 2256 transitions. [2022-11-16 12:28:14,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1038 [2022-11-16 12:28:14,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:14,792 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 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] [2022-11-16 12:28:14,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:28:14,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:14,992 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:28:14,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:14,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1529978106, now seen corresponding path program 1 times [2022-11-16 12:28:14,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:28:14,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585695070] [2022-11-16 12:28:14,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:14,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:28:17,035 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:28:17,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510917491] [2022-11-16 12:28:17,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:17,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:17,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:28:17,042 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:28:17,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:28:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:31,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 28310 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:28:31,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:28:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4406 backedges. 730 proven. 0 refuted. 0 times theorem prover too weak. 3676 trivial. 0 not checked. [2022-11-16 12:28:31,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:28:31,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:28:31,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585695070] [2022-11-16 12:28:31,574 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:28:31,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510917491] [2022-11-16 12:28:31,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510917491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:28:31,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:28:31,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:28:31,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073059338] [2022-11-16 12:28:31,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:28:31,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:28:31,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:28:31,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:28:31,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:28:31,579 INFO L87 Difference]: Start difference. First operand 1860 states and 2256 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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) [2022-11-16 12:28:31,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:31,731 INFO L93 Difference]: Finished difference Result 3629 states and 4406 transitions. [2022-11-16 12:28:31,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:28:31,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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 1037 [2022-11-16 12:28:31,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:31,741 INFO L225 Difference]: With dead ends: 3629 [2022-11-16 12:28:31,741 INFO L226 Difference]: Without dead ends: 1910 [2022-11-16 12:28:31,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1036 GetRequests, 1035 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:28:31,747 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 105 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:31,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 622 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:28:31,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2022-11-16 12:28:31,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1908. [2022-11-16 12:28:31,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1834 states have (on average 1.1853871319520175) internal successors, (2174), 1845 states have internal predecessors, (2174), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 62 states have call predecessors, (70), 70 states have call successors, (70) [2022-11-16 12:28:31,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2314 transitions. [2022-11-16 12:28:31,873 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2314 transitions. Word has length 1037 [2022-11-16 12:28:31,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:31,874 INFO L495 AbstractCegarLoop]: Abstraction has 1908 states and 2314 transitions. [2022-11-16 12:28:31,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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) [2022-11-16 12:28:31,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2314 transitions. [2022-11-16 12:28:31,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1053 [2022-11-16 12:28:31,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:31,900 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:28:31,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:28:32,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:32,114 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:28:32,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:32,115 INFO L85 PathProgramCache]: Analyzing trace with hash -685791536, now seen corresponding path program 1 times [2022-11-16 12:28:32,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:28:32,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813995438] [2022-11-16 12:28:32,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:32,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:28:34,028 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:28:34,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728664839] [2022-11-16 12:28:34,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:34,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:34,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:28:34,030 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:28:34,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:28:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:49,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 27447 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:28:49,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:28:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 1431 proven. 0 refuted. 0 times theorem prover too weak. 2977 trivial. 0 not checked. [2022-11-16 12:28:53,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:28:53,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:28:53,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813995438] [2022-11-16 12:28:53,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:28:53,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728664839] [2022-11-16 12:28:53,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728664839] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:28:53,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:28:53,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:28:53,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994573942] [2022-11-16 12:28:53,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:28:53,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:28:53,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:28:53,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:28:53,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:28:53,171 INFO L87 Difference]: Start difference. First operand 1908 states and 2314 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:28:53,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:53,328 INFO L93 Difference]: Finished difference Result 4737 states and 5750 transitions. [2022-11-16 12:28:53,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:28:53,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 1052 [2022-11-16 12:28:53,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:53,343 INFO L225 Difference]: With dead ends: 4737 [2022-11-16 12:28:53,343 INFO L226 Difference]: Without dead ends: 3317 [2022-11-16 12:28:53,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1051 GetRequests, 1050 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:28:53,347 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 127 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:53,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 760 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:28:53,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3317 states. [2022-11-16 12:28:53,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3317 to 3315. [2022-11-16 12:28:53,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3208 states have (on average 1.186720698254364) internal successors, (3807), 3219 states have internal predecessors, (3807), 103 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (103), 95 states have call predecessors, (103), 103 states have call successors, (103) [2022-11-16 12:28:53,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 4013 transitions. [2022-11-16 12:28:53,505 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 4013 transitions. Word has length 1052 [2022-11-16 12:28:53,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:53,508 INFO L495 AbstractCegarLoop]: Abstraction has 3315 states and 4013 transitions. [2022-11-16 12:28:53,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:28:53,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 4013 transitions. [2022-11-16 12:28:53,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1060 [2022-11-16 12:28:53,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:53,529 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:28:53,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:28:53,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 12:28:53,738 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:28:53,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:53,739 INFO L85 PathProgramCache]: Analyzing trace with hash -646663346, now seen corresponding path program 1 times [2022-11-16 12:28:53,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:28:53,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784705963] [2022-11-16 12:28:53,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:53,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:28:55,913 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:28:55,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1578071327] [2022-11-16 12:28:55,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:55,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:55,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:28:55,922 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:28:55,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88cd3aef-7dda-46d3-9035-e9daf35065b4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process