./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ec105877a5c5817dc7d6d5e780267dcadb379ad27281f7d8981115c8613ba085 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:45:22,164 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:45:22,268 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:45:22,276 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:45:22,277 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:45:22,312 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:45:22,313 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:45:22,314 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:45:22,315 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:45:22,316 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:45:22,317 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:45:22,318 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:45:22,319 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:45:22,320 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:45:22,321 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:45:22,321 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:45:22,322 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:45:22,323 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:45:22,323 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:45:22,324 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:45:22,324 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:45:22,325 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:45:22,326 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:45:22,326 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:45:22,327 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:45:22,328 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:45:22,328 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:45:22,329 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:45:22,329 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:45:22,330 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:45:22,330 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:45:22,331 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:45:22,332 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:45:22,332 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:45:22,333 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:45:22,333 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:45:22,334 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:45:22,334 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:45:22,335 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:45:22,335 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_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec105877a5c5817dc7d6d5e780267dcadb379ad27281f7d8981115c8613ba085 [2023-11-06 22:45:22,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:45:22,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:45:22,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:45:22,661 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:45:22,662 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:45:22,664 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test1-1.i [2023-11-06 22:45:26,435 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:45:26,892 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:45:26,893 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test1-1.i [2023-11-06 22:45:26,933 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/data/0b8ee4a5b/ac259b662d114a3797ff9c51703f8157/FLAG69cf8ebc2 [2023-11-06 22:45:26,951 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/data/0b8ee4a5b/ac259b662d114a3797ff9c51703f8157 [2023-11-06 22:45:26,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:45:26,965 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:45:26,967 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:45:26,967 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:45:26,976 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:45:26,977 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:26" (1/1) ... [2023-11-06 22:45:26,979 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f8c9dd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:26, skipping insertion in model container [2023-11-06 22:45:26,979 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:26" (1/1) ... [2023-11-06 22:45:27,089 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:45:27,730 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_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test1-1.i[33021,33034] [2023-11-06 22:45:27,918 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:45:27,945 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:45:28,006 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_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test1-1.i[33021,33034] [2023-11-06 22:45:28,070 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:45:28,117 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:45:28,118 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:28 WrapperNode [2023-11-06 22:45:28,118 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:45:28,119 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:45:28,120 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:45:28,120 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:45:28,128 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:28" (1/1) ... [2023-11-06 22:45:28,214 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:28" (1/1) ... [2023-11-06 22:45:28,337 INFO L138 Inliner]: procedures = 177, calls = 186, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 790 [2023-11-06 22:45:28,338 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:45:28,339 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:45:28,339 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:45:28,339 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:45:28,351 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:28" (1/1) ... [2023-11-06 22:45:28,351 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:28" (1/1) ... [2023-11-06 22:45:28,361 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:28" (1/1) ... [2023-11-06 22:45:28,362 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:28" (1/1) ... [2023-11-06 22:45:28,404 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:28" (1/1) ... [2023-11-06 22:45:28,416 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:28" (1/1) ... [2023-11-06 22:45:28,421 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:28" (1/1) ... [2023-11-06 22:45:28,427 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:28" (1/1) ... [2023-11-06 22:45:28,451 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:45:28,452 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:45:28,452 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:45:28,453 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:45:28,454 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:28" (1/1) ... [2023-11-06 22:45:28,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:45:28,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:28,499 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:45:28,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:45:28,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:45:28,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-06 22:45:28,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-06 22:45:28,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:45:28,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-06 22:45:28,558 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-06 22:45:28,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:45:28,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:45:28,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:45:28,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 22:45:28,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 22:45:28,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:45:28,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:45:28,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:45:28,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:45:28,849 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:45:28,854 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:45:30,325 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:45:30,340 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:45:30,341 INFO L302 CfgBuilder]: Removed 31 assume(true) statements. [2023-11-06 22:45:30,345 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:30 BoogieIcfgContainer [2023-11-06 22:45:30,345 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:45:30,350 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:45:30,351 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:45:30,355 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:45:30,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:45:26" (1/3) ... [2023-11-06 22:45:30,357 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba3df66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:30, skipping insertion in model container [2023-11-06 22:45:30,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:28" (2/3) ... [2023-11-06 22:45:30,359 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba3df66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:30, skipping insertion in model container [2023-11-06 22:45:30,359 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:30" (3/3) ... [2023-11-06 22:45:30,362 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test1-1.i [2023-11-06 22:45:30,389 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:45:30,389 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:45:30,490 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:45:30,502 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@147400cd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:45:30,504 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:45:30,513 INFO L276 IsEmpty]: Start isEmpty. Operand has 213 states, 196 states have (on average 1.683673469387755) internal successors, (330), 207 states have internal predecessors, (330), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 22:45:30,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 22:45:30,526 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:45:30,527 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:30,528 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:45:30,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:30,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1530581310, now seen corresponding path program 1 times [2023-11-06 22:45:30,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:30,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58642193] [2023-11-06 22:45:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:30,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:30,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:30,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58642193] [2023-11-06 22:45:30,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58642193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:45:30,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:45:30,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:45:30,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599552986] [2023-11-06 22:45:30,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:45:30,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:45:30,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:30,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:45:30,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:45:30,932 INFO L87 Difference]: Start difference. First operand has 213 states, 196 states have (on average 1.683673469387755) internal successors, (330), 207 states have internal predecessors, (330), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) 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) [2023-11-06 22:45:31,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:45:31,132 INFO L93 Difference]: Finished difference Result 596 states and 1014 transitions. [2023-11-06 22:45:31,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:45:31,136 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 [2023-11-06 22:45:31,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:45:31,165 INFO L225 Difference]: With dead ends: 596 [2023-11-06 22:45:31,166 INFO L226 Difference]: Without dead ends: 381 [2023-11-06 22:45:31,175 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 [2023-11-06 22:45:31,181 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 252 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 631 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 [2023-11-06 22:45:31,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 631 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:45:31,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2023-11-06 22:45:31,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 210. [2023-11-06 22:45:31,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 194 states have (on average 1.5) internal successors, (291), 204 states have internal predecessors, (291), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 22:45:31,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 317 transitions. [2023-11-06 22:45:31,297 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 317 transitions. Word has length 10 [2023-11-06 22:45:31,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:45:31,298 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 317 transitions. [2023-11-06 22:45:31,299 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) [2023-11-06 22:45:31,299 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 317 transitions. [2023-11-06 22:45:31,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-06 22:45:31,307 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:45:31,307 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] [2023-11-06 22:45:31,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:45:31,308 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:45:31,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:31,309 INFO L85 PathProgramCache]: Analyzing trace with hash 545589277, now seen corresponding path program 1 times [2023-11-06 22:45:31,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:31,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465628945] [2023-11-06 22:45:31,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:31,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:31,413 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:45:31,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142169703] [2023-11-06 22:45:31,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:31,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:31,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:31,419 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:31,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:45:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:31,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:45:31,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:31,965 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:45:31,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:31,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465628945] [2023-11-06 22:45:31,966 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:45:31,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142169703] [2023-11-06 22:45:31,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142169703] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:45:31,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:45:31,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:45:31,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816357956] [2023-11-06 22:45:31,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:45:31,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:45:31,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:31,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:45:31,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:45:31,972 INFO L87 Difference]: Start difference. First operand 210 states and 317 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2023-11-06 22:45:32,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:45:32,092 INFO L93 Difference]: Finished difference Result 438 states and 662 transitions. [2023-11-06 22:45:32,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:45:32,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 85 [2023-11-06 22:45:32,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:45:32,095 INFO L225 Difference]: With dead ends: 438 [2023-11-06 22:45:32,096 INFO L226 Difference]: Without dead ends: 231 [2023-11-06 22:45:32,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:45:32,099 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 9 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 577 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 [2023-11-06 22:45:32,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 577 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:45:32,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-11-06 22:45:32,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2023-11-06 22:45:32,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 214 states have (on average 1.4532710280373833) internal successors, (311), 224 states have internal predecessors, (311), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 22:45:32,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 337 transitions. [2023-11-06 22:45:32,121 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 337 transitions. Word has length 85 [2023-11-06 22:45:32,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:45:32,122 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 337 transitions. [2023-11-06 22:45:32,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2023-11-06 22:45:32,122 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 337 transitions. [2023-11-06 22:45:32,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-06 22:45:32,128 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:45:32,128 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] [2023-11-06 22:45:32,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:32,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:32,337 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:45:32,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:32,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1038215451, now seen corresponding path program 1 times [2023-11-06 22:45:32,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:32,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767581070] [2023-11-06 22:45:32,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:32,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:32,442 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:45:32,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074645564] [2023-11-06 22:45:32,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:32,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:32,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:32,450 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:32,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:45:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:32,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:45:32,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:32,820 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:45:32,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:32,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767581070] [2023-11-06 22:45:32,821 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:45:32,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074645564] [2023-11-06 22:45:32,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074645564] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:45:32,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:45:32,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:45:32,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193164456] [2023-11-06 22:45:32,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:45:32,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:45:32,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:32,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:45:32,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:45:32,825 INFO L87 Difference]: Start difference. First operand 230 states and 337 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2023-11-06 22:45:32,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:45:32,944 INFO L93 Difference]: Finished difference Result 444 states and 658 transitions. [2023-11-06 22:45:32,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:45:32,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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 85 [2023-11-06 22:45:32,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:45:32,947 INFO L225 Difference]: With dead ends: 444 [2023-11-06 22:45:32,947 INFO L226 Difference]: Without dead ends: 217 [2023-11-06 22:45:32,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:45:32,950 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 165 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 713 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 [2023-11-06 22:45:32,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 713 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:45:32,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-11-06 22:45:32,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2023-11-06 22:45:32,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 200 states have (on average 1.45) internal successors, (290), 210 states have internal predecessors, (290), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 22:45:32,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 316 transitions. [2023-11-06 22:45:32,967 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 316 transitions. Word has length 85 [2023-11-06 22:45:32,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:45:32,967 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 316 transitions. [2023-11-06 22:45:32,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2023-11-06 22:45:32,968 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 316 transitions. [2023-11-06 22:45:32,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-06 22:45:32,973 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:45:32,973 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] [2023-11-06 22:45:32,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:33,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:33,181 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:45:33,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:33,182 INFO L85 PathProgramCache]: Analyzing trace with hash 376537641, now seen corresponding path program 1 times [2023-11-06 22:45:33,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:33,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087025489] [2023-11-06 22:45:33,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:33,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:33,255 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:45:33,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621461086] [2023-11-06 22:45:33,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:33,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:33,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:33,261 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:33,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:45:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:33,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:45:33,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:33,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:34,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:34,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087025489] [2023-11-06 22:45:34,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:45:34,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621461086] [2023-11-06 22:45:34,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621461086] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:34,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:45:34,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-06 22:45:34,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982072485] [2023-11-06 22:45:34,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:34,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:45:34,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:34,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:45:34,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:45:34,029 INFO L87 Difference]: Start difference. First operand 216 states and 316 transitions. Second operand has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 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) [2023-11-06 22:45:34,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:45:34,171 INFO L93 Difference]: Finished difference Result 781 states and 1143 transitions. [2023-11-06 22:45:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:45:34,172 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 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 85 [2023-11-06 22:45:34,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:45:34,182 INFO L225 Difference]: With dead ends: 781 [2023-11-06 22:45:34,183 INFO L226 Difference]: Without dead ends: 750 [2023-11-06 22:45:34,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:45:34,189 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 1338 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1350 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:45:34,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1350 Valid, 1193 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:45:34,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2023-11-06 22:45:34,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 750. [2023-11-06 22:45:34,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 725 states have (on average 1.4427586206896552) internal successors, (1046), 735 states have internal predecessors, (1046), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-06 22:45:34,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1090 transitions. [2023-11-06 22:45:34,245 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1090 transitions. Word has length 85 [2023-11-06 22:45:34,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:45:34,246 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 1090 transitions. [2023-11-06 22:45:34,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 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) [2023-11-06 22:45:34,247 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1090 transitions. [2023-11-06 22:45:34,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-06 22:45:34,260 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:45:34,261 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:34,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:34,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:34,469 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:45:34,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:34,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1997604350, now seen corresponding path program 2 times [2023-11-06 22:45:34,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:34,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522967636] [2023-11-06 22:45:34,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:34,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:34,663 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:45:34,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139743438] [2023-11-06 22:45:34,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:45:34,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:34,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:34,665 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:34,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:45:35,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:45:35,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:45:35,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:45:35,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-11-06 22:45:36,872 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:45:36,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:36,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522967636] [2023-11-06 22:45:36,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:45:36,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139743438] [2023-11-06 22:45:36,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139743438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:45:36,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:45:36,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:45:36,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394801198] [2023-11-06 22:45:36,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:45:36,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:45:36,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:36,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:45:36,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:45:36,877 INFO L87 Difference]: Start difference. First operand 750 states and 1090 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2023-11-06 22:45:37,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:45:37,188 INFO L93 Difference]: Finished difference Result 1369 states and 1987 transitions. [2023-11-06 22:45:37,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:45:37,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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 310 [2023-11-06 22:45:37,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:45:37,196 INFO L225 Difference]: With dead ends: 1369 [2023-11-06 22:45:37,196 INFO L226 Difference]: Without dead ends: 748 [2023-11-06 22:45:37,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:45:37,199 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 123 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:45:37,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 874 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:45:37,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2023-11-06 22:45:37,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 748. [2023-11-06 22:45:37,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 723 states have (on average 1.4426002766251729) internal successors, (1043), 733 states have internal predecessors, (1043), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-06 22:45:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1087 transitions. [2023-11-06 22:45:37,235 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1087 transitions. Word has length 310 [2023-11-06 22:45:37,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:45:37,236 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 1087 transitions. [2023-11-06 22:45:37,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2023-11-06 22:45:37,237 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1087 transitions. [2023-11-06 22:45:37,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2023-11-06 22:45:37,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:45:37,246 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, 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] [2023-11-06 22:45:37,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:37,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:37,453 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:45:37,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:37,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1159946007, now seen corresponding path program 1 times [2023-11-06 22:45:37,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:37,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988578632] [2023-11-06 22:45:37,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:37,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:37,688 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:45:37,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106296765] [2023-11-06 22:45:37,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:37,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:37,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:37,690 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:37,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:45:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:38,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 1633 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:45:38,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:39,225 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 448 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:45:39,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 448 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:45:39,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:39,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988578632] [2023-11-06 22:45:39,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:45:39,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106296765] [2023-11-06 22:45:39,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106296765] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:39,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:45:39,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-06 22:45:39,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176472123] [2023-11-06 22:45:39,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:39,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:45:39,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:39,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:45:39,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:45:39,926 INFO L87 Difference]: Start difference. First operand 748 states and 1087 transitions. Second operand has 12 states, 12 states have (on average 52.0) internal successors, (624), 12 states have internal predecessors, (624), 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) [2023-11-06 22:45:40,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:45:40,316 INFO L93 Difference]: Finished difference Result 1847 states and 2691 transitions. [2023-11-06 22:45:40,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:45:40,317 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 52.0) internal successors, (624), 12 states have internal predecessors, (624), 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 325 [2023-11-06 22:45:40,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:45:40,335 INFO L225 Difference]: With dead ends: 1847 [2023-11-06 22:45:40,335 INFO L226 Difference]: Without dead ends: 1816 [2023-11-06 22:45:40,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 638 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:45:40,338 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 3386 mSDsluCounter, 2438 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3412 SdHoareTripleChecker+Valid, 2824 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:45:40,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3412 Valid, 2824 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:45:40,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2023-11-06 22:45:40,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1816. [2023-11-06 22:45:40,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1773 states have (on average 1.4410603496897914) internal successors, (2555), 1783 states have internal predecessors, (2555), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-06 22:45:40,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2635 transitions. [2023-11-06 22:45:40,420 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2635 transitions. Word has length 325 [2023-11-06 22:45:40,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:45:40,422 INFO L495 AbstractCegarLoop]: Abstraction has 1816 states and 2635 transitions. [2023-11-06 22:45:40,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 52.0) internal successors, (624), 12 states have internal predecessors, (624), 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) [2023-11-06 22:45:40,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2635 transitions. [2023-11-06 22:45:40,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2023-11-06 22:45:40,455 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:45:40,455 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, 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] [2023-11-06 22:45:40,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:40,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:45:40,667 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:45:40,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:40,668 INFO L85 PathProgramCache]: Analyzing trace with hash 735373321, now seen corresponding path program 2 times [2023-11-06 22:45:40,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:40,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934353583] [2023-11-06 22:45:40,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:40,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:41,129 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:45:41,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412765844] [2023-11-06 22:45:41,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:45:41,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:41,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:41,132 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:41,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:46:11,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:46:11,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:46:11,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 3775 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 22:46:11,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:12,197 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-06 22:46:12,883 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:46:12,884 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-06 22:46:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 1347 proven. 137 refuted. 0 times theorem prover too weak. 1887 trivial. 0 not checked. [2023-11-06 22:46:13,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:46:13,961 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:46:13,961 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-06 22:46:23,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:23,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934353583] [2023-11-06 22:46:23,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:46:23,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412765844] [2023-11-06 22:46:23,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412765844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:46:23,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:46:23,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-06 22:46:23,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543947379] [2023-11-06 22:46:23,024 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:46:23,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:46:23,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:23,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:46:23,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:46:23,028 INFO L87 Difference]: Start difference. First operand 1816 states and 2635 transitions. Second operand has 15 states, 15 states have (on average 18.266666666666666) internal successors, (274), 15 states have internal predecessors, (274), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:46:31,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:46:31,142 INFO L93 Difference]: Finished difference Result 3234 states and 4686 transitions. [2023-11-06 22:46:31,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:46:31,142 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 18.266666666666666) internal successors, (274), 15 states have internal predecessors, (274), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 775 [2023-11-06 22:46:31,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:46:31,154 INFO L225 Difference]: With dead ends: 3234 [2023-11-06 22:46:31,155 INFO L226 Difference]: Without dead ends: 1853 [2023-11-06 22:46:31,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1487 GetRequests, 1455 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 22:46:31,158 INFO L413 NwaCegarLoop]: 739 mSDtfsCounter, 1183 mSDsluCounter, 4784 mSDsCounter, 0 mSdLazyCounter, 4032 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 5523 SdHoareTripleChecker+Invalid, 4041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 4032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:46:31,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1191 Valid, 5523 Invalid, 4041 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9 Valid, 4032 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2023-11-06 22:46:31,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2023-11-06 22:46:31,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1848. [2023-11-06 22:46:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1805 states have (on average 1.43601108033241) internal successors, (2592), 1815 states have internal predecessors, (2592), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-06 22:46:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 2672 transitions. [2023-11-06 22:46:31,230 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 2672 transitions. Word has length 775 [2023-11-06 22:46:31,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:46:31,231 INFO L495 AbstractCegarLoop]: Abstraction has 1848 states and 2672 transitions. [2023-11-06 22:46:31,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 18.266666666666666) internal successors, (274), 15 states have internal predecessors, (274), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:46:31,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 2672 transitions. [2023-11-06 22:46:31,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2023-11-06 22:46:31,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:46:31,258 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, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:31,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:46:31,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:46:31,481 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:46:31,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:31,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1322296761, now seen corresponding path program 1 times [2023-11-06 22:46:31,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:31,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836463548] [2023-11-06 22:46:31,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:31,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:31,843 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:46:31,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [913253264] [2023-11-06 22:46:31,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:31,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:31,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:31,845 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:31,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:46:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:33,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 3773 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:46:33,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 1336 proven. 0 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2023-11-06 22:46:33,690 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:46:33,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:33,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836463548] [2023-11-06 22:46:33,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:46:33,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913253264] [2023-11-06 22:46:33,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913253264] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:46:33,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:46:33,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:46:33,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472568584] [2023-11-06 22:46:33,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:46:33,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:46:33,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:33,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:46:33,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:46:33,696 INFO L87 Difference]: Start difference. First operand 1848 states and 2672 transitions. Second operand has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:46:33,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:46:33,808 INFO L93 Difference]: Finished difference Result 3206 states and 4548 transitions. [2023-11-06 22:46:33,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:46:33,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 775 [2023-11-06 22:46:33,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:46:33,819 INFO L225 Difference]: With dead ends: 3206 [2023-11-06 22:46:33,820 INFO L226 Difference]: Without dead ends: 1366 [2023-11-06 22:46:33,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 772 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:46:33,824 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 78 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:46:33,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 581 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:46:33,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2023-11-06 22:46:33,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1366. [2023-11-06 22:46:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1323 states have (on average 1.348450491307634) internal successors, (1784), 1333 states have internal predecessors, (1784), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-06 22:46:33,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1864 transitions. [2023-11-06 22:46:33,882 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1864 transitions. Word has length 775 [2023-11-06 22:46:33,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:46:33,883 INFO L495 AbstractCegarLoop]: Abstraction has 1366 states and 1864 transitions. [2023-11-06 22:46:33,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:46:33,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1864 transitions. [2023-11-06 22:46:33,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 777 [2023-11-06 22:46:33,913 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:46:33,914 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, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:33,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:46:34,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:34,131 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:46:34,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:34,131 INFO L85 PathProgramCache]: Analyzing trace with hash -2071407855, now seen corresponding path program 1 times [2023-11-06 22:46:34,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:34,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596502763] [2023-11-06 22:46:34,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:34,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:34,452 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:46:34,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303562721] [2023-11-06 22:46:34,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:34,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:34,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:34,459 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:34,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:46:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:47,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 3776 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-06 22:46:47,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:47,896 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-06 22:46:48,435 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:46:48,436 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-06 22:46:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 1839 proven. 902 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2023-11-06 22:46:48,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:46:49,342 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:46:49,342 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-06 22:47:13,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:47:13,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596502763] [2023-11-06 22:47:13,489 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:47:13,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303562721] [2023-11-06 22:47:13,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303562721] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:47:13,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:47:13,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-06 22:47:13,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153520313] [2023-11-06 22:47:13,490 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:47:13,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:47:13,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:47:13,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:47:13,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:47:13,495 INFO L87 Difference]: Start difference. First operand 1366 states and 1864 transitions. Second operand has 18 states, 18 states have (on average 27.77777777777778) internal successors, (500), 18 states have internal predecessors, (500), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:47:24,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:47:26,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:47:26,304 INFO L93 Difference]: Finished difference Result 2033 states and 2788 transitions. [2023-11-06 22:47:26,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:47:26,305 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 27.77777777777778) internal successors, (500), 18 states have internal predecessors, (500), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 776 [2023-11-06 22:47:26,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:47:26,315 INFO L225 Difference]: With dead ends: 2033 [2023-11-06 22:47:26,315 INFO L226 Difference]: Without dead ends: 1366 [2023-11-06 22:47:26,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1489 GetRequests, 1451 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 22:47:26,318 INFO L413 NwaCegarLoop]: 1094 mSDtfsCounter, 1096 mSDsluCounter, 10244 mSDsCounter, 0 mSdLazyCounter, 5144 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 11338 SdHoareTripleChecker+Invalid, 5153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 5144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:47:26,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1113 Valid, 11338 Invalid, 5153 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9 Valid, 5144 Invalid, 0 Unknown, 0 Unchecked, 12.2s Time] [2023-11-06 22:47:26,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2023-11-06 22:47:26,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1366. [2023-11-06 22:47:26,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1323 states have (on average 1.347694633408919) internal successors, (1783), 1333 states have internal predecessors, (1783), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-06 22:47:26,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1863 transitions. [2023-11-06 22:47:26,373 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1863 transitions. Word has length 776 [2023-11-06 22:47:26,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:47:26,374 INFO L495 AbstractCegarLoop]: Abstraction has 1366 states and 1863 transitions. [2023-11-06 22:47:26,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 27.77777777777778) internal successors, (500), 18 states have internal predecessors, (500), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:47:26,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1863 transitions. [2023-11-06 22:47:26,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2023-11-06 22:47:26,384 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:47:26,385 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, 9, 9, 9, 8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:47:26,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:47:26,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:47:26,606 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:47:26,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:26,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1671151285, now seen corresponding path program 2 times [2023-11-06 22:47:26,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:47:26,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402026425] [2023-11-06 22:47:26,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:26,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:47:26,949 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:47:26,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907769783] [2023-11-06 22:47:26,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:47:26,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:47:26,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:47:26,951 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:47:26,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:47:38,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:47:38,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:47:38,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 3777 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 22:47:38,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:39,152 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-06 22:47:39,727 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:47:39,727 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-06 22:47:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3372 backedges. 883 proven. 32 refuted. 0 times theorem prover too weak. 2457 trivial. 0 not checked. [2023-11-06 22:47:39,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:47:40,568 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:47:40,568 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-06 22:47:42,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:47:42,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402026425] [2023-11-06 22:47:42,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:47:42,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907769783] [2023-11-06 22:47:42,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907769783] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:47:42,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:47:42,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-06 22:47:42,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020273350] [2023-11-06 22:47:42,296 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:47:42,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:47:42,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:47:42,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:47:42,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:47:42,300 INFO L87 Difference]: Start difference. First operand 1366 states and 1863 transitions. Second operand has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:47:47,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:47:47,012 INFO L93 Difference]: Finished difference Result 2565 states and 3509 transitions. [2023-11-06 22:47:47,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:47:47,013 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 777 [2023-11-06 22:47:47,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:47:47,022 INFO L225 Difference]: With dead ends: 2565 [2023-11-06 22:47:47,022 INFO L226 Difference]: Without dead ends: 1366 [2023-11-06 22:47:47,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1491 GetRequests, 1461 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:47:47,026 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 606 mSDsluCounter, 2533 mSDsCounter, 0 mSdLazyCounter, 1899 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 2916 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:47:47,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 2916 Invalid, 1908 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9 Valid, 1899 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-06 22:47:47,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2023-11-06 22:47:47,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1366. [2023-11-06 22:47:47,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1323 states have (on average 1.346938775510204) internal successors, (1782), 1333 states have internal predecessors, (1782), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-06 22:47:47,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1862 transitions. [2023-11-06 22:47:47,087 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1862 transitions. Word has length 777 [2023-11-06 22:47:47,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:47:47,087 INFO L495 AbstractCegarLoop]: Abstraction has 1366 states and 1862 transitions. [2023-11-06 22:47:47,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:47:47,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1862 transitions. [2023-11-06 22:47:47,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 779 [2023-11-06 22:47:47,096 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:47:47,097 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, 9, 9, 9, 7, 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] [2023-11-06 22:47:47,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:47:47,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:47:47,302 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:47:47,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:47,302 INFO L85 PathProgramCache]: Analyzing trace with hash 2021094549, now seen corresponding path program 3 times [2023-11-06 22:47:47,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:47:47,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25973631] [2023-11-06 22:47:47,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:47,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:47:47,617 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:47:47,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521391276] [2023-11-06 22:47:47,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:47:47,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:47:47,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:47:47,622 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:47:47,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:47:49,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:47:49,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:47:49,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:47:49,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3374 backedges. 629 proven. 0 refuted. 0 times theorem prover too weak. 2745 trivial. 0 not checked. [2023-11-06 22:47:49,194 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:47:49,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:47:49,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25973631] [2023-11-06 22:47:49,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:47:49,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521391276] [2023-11-06 22:47:49,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521391276] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:47:49,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:47:49,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 22:47:49,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750278402] [2023-11-06 22:47:49,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:47:49,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:47:49,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:47:49,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:47:49,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:47:49,199 INFO L87 Difference]: Start difference. First operand 1366 states and 1862 transitions. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:47:49,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:47:49,572 INFO L93 Difference]: Finished difference Result 2766 states and 3797 transitions. [2023-11-06 22:47:49,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:47:49,574 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 778 [2023-11-06 22:47:49,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:47:49,583 INFO L225 Difference]: With dead ends: 2766 [2023-11-06 22:47:49,584 INFO L226 Difference]: Without dead ends: 1436 [2023-11-06 22:47:49,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 771 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:47:49,587 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 23 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:47:49,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 1116 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:47:49,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2023-11-06 22:47:49,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1415. [2023-11-06 22:47:49,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1415 states, 1372 states have (on average 1.337463556851312) internal successors, (1835), 1382 states have internal predecessors, (1835), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-06 22:47:49,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 1915 transitions. [2023-11-06 22:47:49,645 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 1915 transitions. Word has length 778 [2023-11-06 22:47:49,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:47:49,645 INFO L495 AbstractCegarLoop]: Abstraction has 1415 states and 1915 transitions. [2023-11-06 22:47:49,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:47:49,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 1915 transitions. [2023-11-06 22:47:49,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 789 [2023-11-06 22:47:49,656 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:47:49,657 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, 9, 9, 9, 7, 7, 7, 3, 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] [2023-11-06 22:47:49,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:47:49,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:47:49,868 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:47:49,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:49,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1991558898, now seen corresponding path program 1 times [2023-11-06 22:47:49,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:47:49,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552289652] [2023-11-06 22:47:49,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:49,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:47:50,253 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:47:50,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648170880] [2023-11-06 22:47:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:50,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:47:50,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:47:50,262 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:47:50,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:48:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:07,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 3788 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-06 22:48:07,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:08,485 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-06 22:48:09,080 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:48:09,080 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-06 22:48:09,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3398 backedges. 1839 proven. 575 refuted. 0 times theorem prover too weak. 984 trivial. 0 not checked. [2023-11-06 22:48:09,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:09,875 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:48:09,876 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-06 22:48:28,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:28,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552289652] [2023-11-06 22:48:28,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:48:28,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648170880] [2023-11-06 22:48:28,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648170880] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:28,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:48:28,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-11-06 22:48:28,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583490921] [2023-11-06 22:48:28,483 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:28,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:48:28,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:28,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:48:28,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2023-11-06 22:48:28,487 INFO L87 Difference]: Start difference. First operand 1415 states and 1915 transitions. Second operand has 17 states, 17 states have (on average 25.58823529411765) internal successors, (435), 17 states have internal predecessors, (435), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:48:41,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:48:41,402 INFO L93 Difference]: Finished difference Result 2240 states and 3045 transitions. [2023-11-06 22:48:41,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:48:41,403 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 25.58823529411765) internal successors, (435), 17 states have internal predecessors, (435), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 788 [2023-11-06 22:48:41,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:48:41,414 INFO L225 Difference]: With dead ends: 2240 [2023-11-06 22:48:41,414 INFO L226 Difference]: Without dead ends: 1408 [2023-11-06 22:48:41,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1512 GetRequests, 1476 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2023-11-06 22:48:41,418 INFO L413 NwaCegarLoop]: 911 mSDtfsCounter, 811 mSDsluCounter, 8370 mSDsCounter, 0 mSdLazyCounter, 4406 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 9281 SdHoareTripleChecker+Invalid, 4412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:48:41,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [825 Valid, 9281 Invalid, 4412 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6 Valid, 4406 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2023-11-06 22:48:41,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2023-11-06 22:48:41,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1408. [2023-11-06 22:48:41,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1365 states have (on average 1.336996336996337) internal successors, (1825), 1375 states have internal predecessors, (1825), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-06 22:48:41,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 1905 transitions. [2023-11-06 22:48:41,483 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 1905 transitions. Word has length 788 [2023-11-06 22:48:41,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:48:41,484 INFO L495 AbstractCegarLoop]: Abstraction has 1408 states and 1905 transitions. [2023-11-06 22:48:41,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 25.58823529411765) internal successors, (435), 17 states have internal predecessors, (435), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:48:41,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 1905 transitions. [2023-11-06 22:48:41,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2023-11-06 22:48:41,496 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:48:41,497 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, 9, 9, 9, 6, 6, 6, 4, 4, 4, 4, 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] [2023-11-06 22:48:41,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:41,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:41,713 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:48:41,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:41,713 INFO L85 PathProgramCache]: Analyzing trace with hash 882766709, now seen corresponding path program 2 times [2023-11-06 22:48:41,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:41,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656227989] [2023-11-06 22:48:41,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:41,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:42,072 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:48:42,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072024549] [2023-11-06 22:48:42,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:48:42,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:42,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:42,078 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:42,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe076bf-17e5-4e03-9bbb-5fbec63c2c26/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:49:04,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:49:04,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:49:04,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 3789 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-06 22:49:04,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:49:04,960 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-06 22:49:05,546 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:49:05,546 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-06 22:49:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3398 backedges. 1674 proven. 319 refuted. 0 times theorem prover too weak. 1405 trivial. 0 not checked. [2023-11-06 22:49:05,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:49:06,506 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:49:06,506 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-06 22:49:20,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:20,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656227989] [2023-11-06 22:49:20,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:49:20,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072024549] [2023-11-06 22:49:20,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072024549] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:49:20,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:49:20,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-11-06 22:49:20,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010125292] [2023-11-06 22:49:20,945 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:49:20,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:49:20,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:20,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:49:20,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:49:20,948 INFO L87 Difference]: Start difference. First operand 1408 states and 1905 transitions. Second operand has 16 states, 16 states have (on average 22.4375) internal successors, (359), 16 states have internal predecessors, (359), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:49:23,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []