./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --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 2dcad53e9f7fd6e0b6384d19db4719ec6aa2601fd94c6ce0d3c746f1ec6b3601 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:06:59,016 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:06:59,140 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:06:59,144 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:06:59,147 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:06:59,185 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:06:59,187 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:06:59,188 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:06:59,190 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:06:59,195 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:06:59,196 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:06:59,196 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:06:59,197 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:06:59,198 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:06:59,199 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:06:59,199 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:06:59,200 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:06:59,200 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:06:59,201 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:06:59,201 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:06:59,202 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:06:59,202 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:06:59,203 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:06:59,203 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:06:59,204 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:06:59,205 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:06:59,206 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:06:59,206 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:06:59,206 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:06:59,208 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:06:59,208 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:06:59,209 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:06:59,209 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:06:59,209 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:06:59,210 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:06:59,210 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:06:59,210 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:06:59,211 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:06:59,211 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:06:59,211 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2dcad53e9f7fd6e0b6384d19db4719ec6aa2601fd94c6ce0d3c746f1ec6b3601 [2023-11-19 08:06:59,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:06:59,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:06:59,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:06:59,579 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:06:59,580 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:06:59,582 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i [2023-11-19 08:07:02,748 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:07:03,135 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:07:03,138 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i [2023-11-19 08:07:03,165 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/data/3e19587cc/27598b871ec04996b43fda38fa774684/FLAGdeb5cf9ca [2023-11-19 08:07:03,182 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/data/3e19587cc/27598b871ec04996b43fda38fa774684 [2023-11-19 08:07:03,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:07:03,191 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:07:03,194 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:07:03,194 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:07:03,200 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:07:03,200 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:07:03" (1/1) ... [2023-11-19 08:07:03,201 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@671aabf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:03, skipping insertion in model container [2023-11-19 08:07:03,202 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:07:03" (1/1) ... [2023-11-19 08:07:03,286 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:07:03,691 WARN L240 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_1def6d12-e540-41cb-aff0-a77741f36220/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i[33021,33034] [2023-11-19 08:07:03,907 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:07:03,921 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:07:03,965 WARN L240 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_1def6d12-e540-41cb-aff0-a77741f36220/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i[33021,33034] [2023-11-19 08:07:04,169 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:07:04,221 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:07:04,222 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:04 WrapperNode [2023-11-19 08:07:04,222 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:07:04,223 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:07:04,223 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:07:04,224 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:07:04,233 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:04" (1/1) ... [2023-11-19 08:07:04,275 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:04" (1/1) ... [2023-11-19 08:07:04,371 INFO L138 Inliner]: procedures = 177, calls = 448, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1805 [2023-11-19 08:07:04,371 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:07:04,372 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:07:04,373 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:07:04,373 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:07:04,385 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:04" (1/1) ... [2023-11-19 08:07:04,385 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:04" (1/1) ... [2023-11-19 08:07:04,400 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:04" (1/1) ... [2023-11-19 08:07:04,401 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:04" (1/1) ... [2023-11-19 08:07:04,491 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:04" (1/1) ... [2023-11-19 08:07:04,518 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:04" (1/1) ... [2023-11-19 08:07:04,537 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:04" (1/1) ... [2023-11-19 08:07:04,549 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:04" (1/1) ... [2023-11-19 08:07:04,567 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:07:04,568 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:07:04,568 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:07:04,569 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:07:04,570 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:04" (1/1) ... [2023-11-19 08:07:04,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:07:04,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:04,606 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:07:04,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:07:04,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:07:04,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 08:07:04,662 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 08:07:04,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:07:04,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-19 08:07:04,663 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-19 08:07:04,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 08:07:04,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:07:04,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:07:04,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 08:07:04,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 08:07:04,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:07:04,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:07:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:07:04,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:07:05,048 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:07:05,052 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:07:07,685 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:07:07,708 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:07:07,709 INFO L302 CfgBuilder]: Removed 77 assume(true) statements. [2023-11-19 08:07:07,721 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:07:07 BoogieIcfgContainer [2023-11-19 08:07:07,721 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:07:07,726 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:07:07,726 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:07:07,729 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:07:07,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:07:03" (1/3) ... [2023-11-19 08:07:07,731 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da325e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:07:07, skipping insertion in model container [2023-11-19 08:07:07,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:04" (2/3) ... [2023-11-19 08:07:07,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da325e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:07:07, skipping insertion in model container [2023-11-19 08:07:07,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:07:07" (3/3) ... [2023-11-19 08:07:07,736 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_BER_test4-3.i [2023-11-19 08:07:07,758 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:07:07,759 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:07:07,841 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:07:07,849 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=LoopHeads, 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;@d0c2da0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:07:07,850 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:07:07,857 INFO L276 IsEmpty]: Start isEmpty. Operand has 441 states, 421 states have (on average 1.6888361045130642) internal successors, (711), 432 states have internal predecessors, (711), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-19 08:07:07,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 08:07:07,867 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:07,867 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:07,868 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:07,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:07,874 INFO L85 PathProgramCache]: Analyzing trace with hash 488223800, now seen corresponding path program 1 times [2023-11-19 08:07:07,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:07,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628751066] [2023-11-19 08:07:07,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:07,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:08,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:08,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628751066] [2023-11-19 08:07:08,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628751066] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:08,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:08,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:07:08,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832473544] [2023-11-19 08:07:08,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:08,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:07:08,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:08,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:07:08,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:07:08,328 INFO L87 Difference]: Start difference. First operand has 441 states, 421 states have (on average 1.6888361045130642) internal successors, (711), 432 states have internal predecessors, (711), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:08,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:08,529 INFO L93 Difference]: Finished difference Result 1220 states and 2075 transitions. [2023-11-19 08:07:08,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:07:08,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-19 08:07:08,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:08,561 INFO L225 Difference]: With dead ends: 1220 [2023-11-19 08:07:08,561 INFO L226 Difference]: Without dead ends: 717 [2023-11-19 08:07:08,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:07:08,578 INFO L413 NwaCegarLoop]: 699 mSDtfsCounter, 501 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:08,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 1352 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:07:08,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2023-11-19 08:07:08,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 378. [2023-11-19 08:07:08,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 359 states have (on average 1.5041782729805013) internal successors, (540), 369 states have internal predecessors, (540), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-19 08:07:08,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 572 transitions. [2023-11-19 08:07:08,677 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 572 transitions. Word has length 10 [2023-11-19 08:07:08,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:08,678 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 572 transitions. [2023-11-19 08:07:08,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:08,678 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 572 transitions. [2023-11-19 08:07:08,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-19 08:07:08,691 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:08,692 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:08,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:07:08,692 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:08,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:08,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1331063781, now seen corresponding path program 1 times [2023-11-19 08:07:08,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:08,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433632222] [2023-11-19 08:07:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:08,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:08,865 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:08,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272285116] [2023-11-19 08:07:08,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:08,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:08,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:08,873 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:08,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:07:09,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:09,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:07:09,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:09,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:09,556 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:07:09,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:09,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433632222] [2023-11-19 08:07:09,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:09,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272285116] [2023-11-19 08:07:09,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272285116] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:09,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:09,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:07:09,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859015263] [2023-11-19 08:07:09,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:09,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:07:09,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:09,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:07:09,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:07:09,563 INFO L87 Difference]: Start difference. First operand 378 states and 572 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:09,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:09,704 INFO L93 Difference]: Finished difference Result 774 states and 1172 transitions. [2023-11-19 08:07:09,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:07:09,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2023-11-19 08:07:09,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:09,710 INFO L225 Difference]: With dead ends: 774 [2023-11-19 08:07:09,711 INFO L226 Difference]: Without dead ends: 399 [2023-11-19 08:07:09,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:07:09,720 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 9 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1087 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 [2023-11-19 08:07:09,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1087 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:07:09,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2023-11-19 08:07:09,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 398. [2023-11-19 08:07:09,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 379 states have (on average 1.4775725593667546) internal successors, (560), 389 states have internal predecessors, (560), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-19 08:07:09,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 592 transitions. [2023-11-19 08:07:09,776 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 592 transitions. Word has length 156 [2023-11-19 08:07:09,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:09,777 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 592 transitions. [2023-11-19 08:07:09,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:09,778 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 592 transitions. [2023-11-19 08:07:09,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-19 08:07:09,788 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:09,788 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:09,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:10,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:10,004 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:10,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:10,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1741674147, now seen corresponding path program 1 times [2023-11-19 08:07:10,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:10,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659148968] [2023-11-19 08:07:10,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:10,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:10,170 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:10,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2120480181] [2023-11-19 08:07:10,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:10,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:10,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:10,179 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:10,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:07:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:10,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:07:10,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:10,829 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:07:10,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:10,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659148968] [2023-11-19 08:07:10,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:10,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120480181] [2023-11-19 08:07:10,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120480181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:10,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:10,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:07:10,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749776777] [2023-11-19 08:07:10,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:10,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:07:10,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:10,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:07:10,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:07:10,836 INFO L87 Difference]: Start difference. First operand 398 states and 592 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:10,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:10,970 INFO L93 Difference]: Finished difference Result 814 states and 1212 transitions. [2023-11-19 08:07:10,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:07:10,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2023-11-19 08:07:10,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:10,979 INFO L225 Difference]: With dead ends: 814 [2023-11-19 08:07:10,979 INFO L226 Difference]: Without dead ends: 419 [2023-11-19 08:07:10,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:07:10,985 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 9 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1087 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 [2023-11-19 08:07:10,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1087 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:07:10,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2023-11-19 08:07:11,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 418. [2023-11-19 08:07:11,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 399 states have (on average 1.4536340852130325) internal successors, (580), 409 states have internal predecessors, (580), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-19 08:07:11,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 612 transitions. [2023-11-19 08:07:11,018 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 612 transitions. Word has length 156 [2023-11-19 08:07:11,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:11,019 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 612 transitions. [2023-11-19 08:07:11,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:11,019 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 612 transitions. [2023-11-19 08:07:11,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-19 08:07:11,028 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:11,029 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:11,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:11,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:11,244 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:11,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:11,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1992593371, now seen corresponding path program 1 times [2023-11-19 08:07:11,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:11,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896865016] [2023-11-19 08:07:11,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:11,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:11,397 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:11,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812193312] [2023-11-19 08:07:11,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:11,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:11,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:11,403 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:11,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:07:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:11,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:07:12,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:12,064 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:07:12,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:12,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896865016] [2023-11-19 08:07:12,069 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:12,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812193312] [2023-11-19 08:07:12,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812193312] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:12,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:12,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:07:12,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496247360] [2023-11-19 08:07:12,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:12,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:07:12,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:12,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:07:12,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:07:12,079 INFO L87 Difference]: Start difference. First operand 418 states and 612 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:12,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:12,206 INFO L93 Difference]: Finished difference Result 820 states and 1208 transitions. [2023-11-19 08:07:12,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:07:12,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2023-11-19 08:07:12,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:12,214 INFO L225 Difference]: With dead ends: 820 [2023-11-19 08:07:12,214 INFO L226 Difference]: Without dead ends: 405 [2023-11-19 08:07:12,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:07:12,220 INFO L413 NwaCegarLoop]: 544 mSDtfsCounter, 165 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1478 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:12,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1478 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:07:12,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2023-11-19 08:07:12,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 404. [2023-11-19 08:07:12,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 385 states have (on average 1.4519480519480519) internal successors, (559), 395 states have internal predecessors, (559), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-19 08:07:12,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 591 transitions. [2023-11-19 08:07:12,248 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 591 transitions. Word has length 156 [2023-11-19 08:07:12,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:12,249 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 591 transitions. [2023-11-19 08:07:12,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:12,250 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 591 transitions. [2023-11-19 08:07:12,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-19 08:07:12,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:12,254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:12,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:12,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:12,480 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:12,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:12,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1837415181, now seen corresponding path program 1 times [2023-11-19 08:07:12,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:12,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203175934] [2023-11-19 08:07:12,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:12,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:12,628 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:12,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890333634] [2023-11-19 08:07:12,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:12,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:12,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:12,630 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:12,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:07:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:13,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:07:13,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:13,276 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:07:13,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:13,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203175934] [2023-11-19 08:07:13,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:13,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890333634] [2023-11-19 08:07:13,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890333634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:13,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:13,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:07:13,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847286512] [2023-11-19 08:07:13,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:13,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:07:13,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:13,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:07:13,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:07:13,280 INFO L87 Difference]: Start difference. First operand 404 states and 591 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:13,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:13,394 INFO L93 Difference]: Finished difference Result 792 states and 1166 transitions. [2023-11-19 08:07:13,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:07:13,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2023-11-19 08:07:13,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:13,398 INFO L225 Difference]: With dead ends: 792 [2023-11-19 08:07:13,398 INFO L226 Difference]: Without dead ends: 391 [2023-11-19 08:07:13,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:07:13,400 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 165 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1457 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:13,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1457 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:07:13,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2023-11-19 08:07:13,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 390. [2023-11-19 08:07:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 371 states have (on average 1.4501347708894878) internal successors, (538), 381 states have internal predecessors, (538), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-19 08:07:13,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 570 transitions. [2023-11-19 08:07:13,420 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 570 transitions. Word has length 156 [2023-11-19 08:07:13,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:13,420 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 570 transitions. [2023-11-19 08:07:13,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:13,421 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 570 transitions. [2023-11-19 08:07:13,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-19 08:07:13,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:13,424 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:13,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:13,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:13,645 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:13,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:13,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1175737371, now seen corresponding path program 1 times [2023-11-19 08:07:13,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:13,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503711288] [2023-11-19 08:07:13,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:13,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:13,761 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:13,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190942873] [2023-11-19 08:07:13,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:13,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:13,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:13,763 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:13,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:07:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:14,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:07:14,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:14,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:14,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:07:14,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:14,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:14,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503711288] [2023-11-19 08:07:14,981 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:14,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190942873] [2023-11-19 08:07:14,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190942873] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:07:14,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:07:14,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-19 08:07:14,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280031098] [2023-11-19 08:07:14,982 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:07:14,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:07:14,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:14,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:07:14,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:07:14,985 INFO L87 Difference]: Start difference. First operand 390 states and 570 transitions. Second operand has 6 states, 6 states have (on average 50.5) internal successors, (303), 6 states have internal predecessors, (303), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:15,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:15,173 INFO L93 Difference]: Finished difference Result 1477 states and 2159 transitions. [2023-11-19 08:07:15,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:07:15,174 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 50.5) internal successors, (303), 6 states have internal predecessors, (303), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2023-11-19 08:07:15,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:15,186 INFO L225 Difference]: With dead ends: 1477 [2023-11-19 08:07:15,186 INFO L226 Difference]: Without dead ends: 1446 [2023-11-19 08:07:15,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:07:15,188 INFO L413 NwaCegarLoop]: 638 mSDtfsCounter, 1961 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1985 SdHoareTripleChecker+Valid, 2315 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:15,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1985 Valid, 2315 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:07:15,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2023-11-19 08:07:15,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 1446. [2023-11-19 08:07:15,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1409 states have (on average 1.446415897799858) internal successors, (2038), 1419 states have internal predecessors, (2038), 34 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (34), 25 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-19 08:07:15,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 2106 transitions. [2023-11-19 08:07:15,259 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 2106 transitions. Word has length 156 [2023-11-19 08:07:15,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:15,259 INFO L495 AbstractCegarLoop]: Abstraction has 1446 states and 2106 transitions. [2023-11-19 08:07:15,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 50.5) internal successors, (303), 6 states have internal predecessors, (303), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:15,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 2106 transitions. [2023-11-19 08:07:15,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2023-11-19 08:07:15,280 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:15,280 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, 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] [2023-11-19 08:07:15,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:15,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:15,509 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:15,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:15,510 INFO L85 PathProgramCache]: Analyzing trace with hash 2111267652, now seen corresponding path program 2 times [2023-11-19 08:07:15,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:15,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811512005] [2023-11-19 08:07:15,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:15,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:15,842 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:15,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732569281] [2023-11-19 08:07:15,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:07:15,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:15,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:15,845 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:15,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:07:16,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 08:07:16,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:07:16,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 08:07:16,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2023-11-19 08:07:19,731 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:07:19,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:19,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811512005] [2023-11-19 08:07:19,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:19,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732569281] [2023-11-19 08:07:19,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732569281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:19,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:19,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:07:19,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549704727] [2023-11-19 08:07:19,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:19,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:07:19,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:19,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:07:19,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:07:19,736 INFO L87 Difference]: Start difference. First operand 1446 states and 2106 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:20,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:20,325 INFO L93 Difference]: Finished difference Result 2587 states and 3765 transitions. [2023-11-19 08:07:20,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:07:20,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 594 [2023-11-19 08:07:20,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:20,344 INFO L225 Difference]: With dead ends: 2587 [2023-11-19 08:07:20,345 INFO L226 Difference]: Without dead ends: 1444 [2023-11-19 08:07:20,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 591 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:07:20,349 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 294 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:20,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 1590 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 08:07:20,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2023-11-19 08:07:20,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1444. [2023-11-19 08:07:20,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1407 states have (on average 1.4463397299218195) internal successors, (2035), 1417 states have internal predecessors, (2035), 34 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (34), 25 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-19 08:07:20,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 2103 transitions. [2023-11-19 08:07:20,420 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 2103 transitions. Word has length 594 [2023-11-19 08:07:20,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:20,421 INFO L495 AbstractCegarLoop]: Abstraction has 1444 states and 2103 transitions. [2023-11-19 08:07:20,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:20,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 2103 transitions. [2023-11-19 08:07:20,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2023-11-19 08:07:20,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:20,445 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, 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, 3, 3, 3, 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] [2023-11-19 08:07:20,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:20,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:20,660 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:20,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:20,661 INFO L85 PathProgramCache]: Analyzing trace with hash 266901889, now seen corresponding path program 1 times [2023-11-19 08:07:20,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:20,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640229676] [2023-11-19 08:07:20,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:20,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:21,046 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:21,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336986331] [2023-11-19 08:07:21,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:21,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:21,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:21,052 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:21,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:07:22,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:22,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 2913 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:07:22,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 08:07:23,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:07:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 08:07:25,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:25,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640229676] [2023-11-19 08:07:25,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:25,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336986331] [2023-11-19 08:07:25,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336986331] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:07:25,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:07:25,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-19 08:07:25,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632804340] [2023-11-19 08:07:25,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:07:25,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 08:07:25,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:25,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 08:07:25,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:07:25,054 INFO L87 Difference]: Start difference. First operand 1444 states and 2103 transitions. Second operand has 12 states, 12 states have (on average 99.33333333333333) internal successors, (1192), 12 states have internal predecessors, (1192), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 08:07:25,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:25,669 INFO L93 Difference]: Finished difference Result 3587 states and 5231 transitions. [2023-11-19 08:07:25,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 08:07:25,671 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 99.33333333333333) internal successors, (1192), 12 states have internal predecessors, (1192), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 609 [2023-11-19 08:07:25,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:25,700 INFO L225 Difference]: With dead ends: 3587 [2023-11-19 08:07:25,700 INFO L226 Difference]: Without dead ends: 3556 [2023-11-19 08:07:25,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1216 GetRequests, 1206 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:07:25,703 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 6072 mSDsluCounter, 4955 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6128 SdHoareTripleChecker+Valid, 5669 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:25,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6128 Valid, 5669 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:07:25,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3556 states. [2023-11-19 08:07:25,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3556 to 3556. [2023-11-19 08:07:25,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3483 states have (on average 1.4455928797014068) internal successors, (5035), 3493 states have internal predecessors, (5035), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 61 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-19 08:07:25,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 5175 transitions. [2023-11-19 08:07:25,917 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 5175 transitions. Word has length 609 [2023-11-19 08:07:25,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:25,919 INFO L495 AbstractCegarLoop]: Abstraction has 3556 states and 5175 transitions. [2023-11-19 08:07:25,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 99.33333333333333) internal successors, (1192), 12 states have internal predecessors, (1192), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 08:07:25,920 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 5175 transitions. [2023-11-19 08:07:26,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1486 [2023-11-19 08:07:26,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:26,053 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, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2023-11-19 08:07:26,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:26,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:26,273 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:26,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:26,274 INFO L85 PathProgramCache]: Analyzing trace with hash 622460435, now seen corresponding path program 2 times [2023-11-19 08:07:26,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:26,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309442254] [2023-11-19 08:07:26,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:26,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:27,065 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:27,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63647740] [2023-11-19 08:07:27,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:07:27,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:27,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:27,067 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:27,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:07:30,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:07:30,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:07:30,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 6969 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 08:07:30,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6566 backedges. 496 proven. 0 refuted. 0 times theorem prover too weak. 6070 trivial. 0 not checked. [2023-11-19 08:07:30,921 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:07:30,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:30,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309442254] [2023-11-19 08:07:30,922 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:30,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63647740] [2023-11-19 08:07:30,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63647740] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:30,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:30,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:07:30,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490631767] [2023-11-19 08:07:30,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:30,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:07:30,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:30,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:07:30,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:07:30,930 INFO L87 Difference]: Start difference. First operand 3556 states and 5175 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 08:07:31,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:31,099 INFO L93 Difference]: Finished difference Result 6981 states and 10157 transitions. [2023-11-19 08:07:31,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:07:31,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 1485 [2023-11-19 08:07:31,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:31,128 INFO L225 Difference]: With dead ends: 6981 [2023-11-19 08:07:31,128 INFO L226 Difference]: Without dead ends: 3554 [2023-11-19 08:07:31,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1484 GetRequests, 1483 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:07:31,138 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 123 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:31,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 1097 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:07:31,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3554 states. [2023-11-19 08:07:31,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3554 to 3554. [2023-11-19 08:07:31,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3554 states, 3481 states have (on average 1.4455616202240735) internal successors, (5032), 3491 states have internal predecessors, (5032), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 61 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-19 08:07:31,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3554 states to 3554 states and 5172 transitions. [2023-11-19 08:07:31,319 INFO L78 Accepts]: Start accepts. Automaton has 3554 states and 5172 transitions. Word has length 1485 [2023-11-19 08:07:31,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:31,319 INFO L495 AbstractCegarLoop]: Abstraction has 3554 states and 5172 transitions. [2023-11-19 08:07:31,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 08:07:31,328 INFO L276 IsEmpty]: Start isEmpty. Operand 3554 states and 5172 transitions. [2023-11-19 08:07:31,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1501 [2023-11-19 08:07:31,362 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:31,364 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, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2023-11-19 08:07:31,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-19 08:07:31,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:31,579 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:31,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:31,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1834978996, now seen corresponding path program 1 times [2023-11-19 08:07:31,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:31,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54414081] [2023-11-19 08:07:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:31,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:32,280 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:32,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712610482] [2023-11-19 08:07:32,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:32,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:32,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:32,283 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:32,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def6d12-e540-41cb-aff0-a77741f36220/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process