./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.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_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/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_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/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_3a8db979-3769-408c-a944-0d6dd9c6ed0c/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 93cc62483e7301c05d7788622f4f3fa5962cd13b8481778ecaf6adfc0416e51e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:21:43,236 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:21:43,319 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:21:43,325 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:21:43,326 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:21:43,354 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:21:43,355 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:21:43,356 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:21:43,357 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:21:43,357 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:21:43,358 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:21:43,363 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:21:43,364 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:21:43,364 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:21:43,365 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:21:43,366 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:21:43,366 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:21:43,371 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:21:43,371 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:21:43,372 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:21:43,372 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:21:43,380 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:21:43,381 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:21:43,381 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:21:43,382 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:21:43,382 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:21:43,383 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:21:43,383 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:21:43,383 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:21:43,384 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:21:43,384 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:21:43,385 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:21:43,385 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:21:43,386 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:21:43,386 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:21:43,386 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:21:43,387 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:21:43,387 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:21:43,388 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:21:43,388 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_3a8db979-3769-408c-a944-0d6dd9c6ed0c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93cc62483e7301c05d7788622f4f3fa5962cd13b8481778ecaf6adfc0416e51e [2023-11-06 22:21:43,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:21:43,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:21:43,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:21:43,714 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:21:43,714 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:21:43,716 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i [2023-11-06 22:21:46,800 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:21:47,183 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:21:47,185 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i [2023-11-06 22:21:47,215 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/data/58601b5d8/278156e358bf49648717e85b7b606af4/FLAGd2c182ffb [2023-11-06 22:21:47,239 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/data/58601b5d8/278156e358bf49648717e85b7b606af4 [2023-11-06 22:21:47,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:21:47,249 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:21:47,258 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:21:47,258 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:21:47,264 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:21:47,268 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:21:47" (1/1) ... [2023-11-06 22:21:47,269 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d66ad93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:47, skipping insertion in model container [2023-11-06 22:21:47,270 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:21:47" (1/1) ... [2023-11-06 22:21:47,369 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:21:47,990 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_3a8db979-3769-408c-a944-0d6dd9c6ed0c/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i[33022,33035] [2023-11-06 22:21:48,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:21:48,290 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:21:48,352 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_3a8db979-3769-408c-a944-0d6dd9c6ed0c/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i[33022,33035] [2023-11-06 22:21:48,558 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:21:48,614 WARN L672 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:21:48,623 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:21:48,623 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:48 WrapperNode [2023-11-06 22:21:48,624 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:21:48,625 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:21:48,625 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:21:48,625 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:21:48,633 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:48" (1/1) ... [2023-11-06 22:21:48,712 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:48" (1/1) ... [2023-11-06 22:21:48,863 INFO L138 Inliner]: procedures = 177, calls = 623, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 3443 [2023-11-06 22:21:48,864 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:21:48,865 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:21:48,865 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:21:48,865 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:21:48,876 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:48" (1/1) ... [2023-11-06 22:21:48,877 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:48" (1/1) ... [2023-11-06 22:21:48,896 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:48" (1/1) ... [2023-11-06 22:21:48,896 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:48" (1/1) ... [2023-11-06 22:21:49,016 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:48" (1/1) ... [2023-11-06 22:21:49,056 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:48" (1/1) ... [2023-11-06 22:21:49,070 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:48" (1/1) ... [2023-11-06 22:21:49,090 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:48" (1/1) ... [2023-11-06 22:21:49,123 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:21:49,124 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:21:49,125 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:21:49,125 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:21:49,126 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:48" (1/1) ... [2023-11-06 22:21:49,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:21:49,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:49,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:21:49,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:21:49,211 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2023-11-06 22:21:49,211 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2023-11-06 22:21:49,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:21:49,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-06 22:21:49,212 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-06 22:21:49,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:21:49,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-06 22:21:49,213 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-06 22:21:49,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:21:49,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:21:49,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 22:21:49,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:21:49,216 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-06 22:21:49,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 22:21:49,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:21:49,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:21:49,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:21:49,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:21:49,730 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:21:49,732 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:21:53,339 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:21:53,367 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:21:53,368 INFO L302 CfgBuilder]: Removed 168 assume(true) statements. [2023-11-06 22:21:53,373 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:21:53 BoogieIcfgContainer [2023-11-06 22:21:53,373 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:21:53,378 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:21:53,378 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:21:53,382 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:21:53,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:21:47" (1/3) ... [2023-11-06 22:21:53,384 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54bb6f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:21:53, skipping insertion in model container [2023-11-06 22:21:53,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:48" (2/3) ... [2023-11-06 22:21:53,386 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54bb6f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:21:53, skipping insertion in model container [2023-11-06 22:21:53,386 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:21:53" (3/3) ... [2023-11-06 22:21:53,388 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test10-3.i [2023-11-06 22:21:53,410 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:21:53,411 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:21:53,526 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:21:53,535 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;@1d789f13, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:21:53,536 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:21:53,548 INFO L276 IsEmpty]: Start isEmpty. Operand has 970 states, 951 states have (on average 1.7097791798107256) internal successors, (1626), 956 states have internal predecessors, (1626), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-06 22:21:53,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-06 22:21:53,559 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:21:53,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:53,560 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:21:53,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:53,569 INFO L85 PathProgramCache]: Analyzing trace with hash 808012131, now seen corresponding path program 1 times [2023-11-06 22:21:53,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:53,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042213792] [2023-11-06 22:21:53,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:53,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:53,833 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 22:21:53,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:53,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042213792] [2023-11-06 22:21:53,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042213792] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:53,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:53,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:21:53,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101857957] [2023-11-06 22:21:53,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:53,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:21:53,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:53,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:21:53,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:21:53,879 INFO L87 Difference]: Start difference. First operand has 970 states, 951 states have (on average 1.7097791798107256) internal successors, (1626), 956 states have internal predecessors, (1626), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:54,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:21:54,018 INFO L93 Difference]: Finished difference Result 1938 states and 3314 transitions. [2023-11-06 22:21:54,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:21:54,022 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-06 22:21:54,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:21:54,056 INFO L225 Difference]: With dead ends: 1938 [2023-11-06 22:21:54,056 INFO L226 Difference]: Without dead ends: 906 [2023-11-06 22:21:54,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:21:54,077 INFO L413 NwaCegarLoop]: 1478 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1478 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:21:54,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1478 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:21:54,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2023-11-06 22:21:54,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 906. [2023-11-06 22:21:54,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 888 states have (on average 1.5360360360360361) internal successors, (1364), 893 states have internal predecessors, (1364), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 22:21:54,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1391 transitions. [2023-11-06 22:21:54,210 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1391 transitions. Word has length 13 [2023-11-06 22:21:54,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:21:54,210 INFO L495 AbstractCegarLoop]: Abstraction has 906 states and 1391 transitions. [2023-11-06 22:21:54,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:54,211 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1391 transitions. [2023-11-06 22:21:54,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-06 22:21:54,218 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:21:54,218 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] [2023-11-06 22:21:54,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:21:54,219 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:21:54,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:54,220 INFO L85 PathProgramCache]: Analyzing trace with hash 2062652801, now seen corresponding path program 1 times [2023-11-06 22:21:54,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:54,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404455021] [2023-11-06 22:21:54,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:54,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:54,732 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 22:21:54,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:54,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404455021] [2023-11-06 22:21:54,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404455021] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:54,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:54,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:21:54,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897865967] [2023-11-06 22:21:54,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:54,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:21:54,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:54,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:21:54,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:21:54,737 INFO L87 Difference]: Start difference. First operand 906 states and 1391 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:55,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:21:55,815 INFO L93 Difference]: Finished difference Result 1685 states and 2613 transitions. [2023-11-06 22:21:55,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:21:55,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-11-06 22:21:55,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:21:55,824 INFO L225 Difference]: With dead ends: 1685 [2023-11-06 22:21:55,824 INFO L226 Difference]: Without dead ends: 1127 [2023-11-06 22:21:55,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:21:55,827 INFO L413 NwaCegarLoop]: 1362 mSDtfsCounter, 351 mSDsluCounter, 2585 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 3947 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:21:55,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 3947 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 22:21:55,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2023-11-06 22:21:55,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 908. [2023-11-06 22:21:55,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 890 states have (on average 1.5348314606741573) internal successors, (1366), 895 states have internal predecessors, (1366), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 22:21:55,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1393 transitions. [2023-11-06 22:21:55,867 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1393 transitions. Word has length 68 [2023-11-06 22:21:55,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:21:55,867 INFO L495 AbstractCegarLoop]: Abstraction has 908 states and 1393 transitions. [2023-11-06 22:21:55,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:55,868 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1393 transitions. [2023-11-06 22:21:55,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-06 22:21:55,873 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:21:55,873 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:21:55,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:21:55,874 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:21:55,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:55,874 INFO L85 PathProgramCache]: Analyzing trace with hash 692503993, now seen corresponding path program 1 times [2023-11-06 22:21:55,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:55,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592367752] [2023-11-06 22:21:55,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:55,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:55,948 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:21:55,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472125199] [2023-11-06 22:21:55,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:55,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:55,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:55,955 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:55,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:21:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:56,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:21:56,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:56,598 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:21:56,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:56,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592367752] [2023-11-06 22:21:56,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:21:56,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472125199] [2023-11-06 22:21:56,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472125199] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:56,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:56,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:21:56,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371336020] [2023-11-06 22:21:56,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:56,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:21:56,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:56,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:21:56,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:21:56,603 INFO L87 Difference]: Start difference. First operand 908 states and 1393 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:56,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:21:56,743 INFO L93 Difference]: Finished difference Result 1833 states and 2813 transitions. [2023-11-06 22:21:56,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:21:56,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2023-11-06 22:21:56,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:21:56,751 INFO L225 Difference]: With dead ends: 1833 [2023-11-06 22:21:56,752 INFO L226 Difference]: Without dead ends: 929 [2023-11-06 22:21:56,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 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 22:21:56,760 INFO L413 NwaCegarLoop]: 1371 mSDtfsCounter, 9 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2727 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 22:21:56,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 2727 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:21:56,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2023-11-06 22:21:56,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 928. [2023-11-06 22:21:56,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 910 states have (on average 1.523076923076923) internal successors, (1386), 915 states have internal predecessors, (1386), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 22:21:56,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1413 transitions. [2023-11-06 22:21:56,806 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1413 transitions. Word has length 145 [2023-11-06 22:21:56,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:21:56,807 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1413 transitions. [2023-11-06 22:21:56,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:56,808 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1413 transitions. [2023-11-06 22:21:56,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-06 22:21:56,811 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:21:56,812 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:21:56,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:57,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:57,020 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:21:57,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:57,021 INFO L85 PathProgramCache]: Analyzing trace with hash -600135371, now seen corresponding path program 1 times [2023-11-06 22:21:57,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:57,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431305183] [2023-11-06 22:21:57,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:57,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:57,116 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:21:57,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221878077] [2023-11-06 22:21:57,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:57,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:57,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:57,120 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:57,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:21:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:57,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:21:57,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:21:57,621 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:21:57,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:57,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431305183] [2023-11-06 22:21:57,621 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:21:57,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221878077] [2023-11-06 22:21:57,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221878077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:57,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:57,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:21:57,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854380296] [2023-11-06 22:21:57,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:57,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:21:57,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:57,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:21:57,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:21:57,624 INFO L87 Difference]: Start difference. First operand 928 states and 1413 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:57,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:21:57,763 INFO L93 Difference]: Finished difference Result 1459 states and 2233 transitions. [2023-11-06 22:21:57,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:21:57,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2023-11-06 22:21:57,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:21:57,772 INFO L225 Difference]: With dead ends: 1459 [2023-11-06 22:21:57,772 INFO L226 Difference]: Without dead ends: 949 [2023-11-06 22:21:57,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 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 22:21:57,776 INFO L413 NwaCegarLoop]: 1371 mSDtfsCounter, 9 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2727 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 22:21:57,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 2727 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:21:57,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2023-11-06 22:21:57,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 948. [2023-11-06 22:21:57,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 930 states have (on average 1.5118279569892472) internal successors, (1406), 935 states have internal predecessors, (1406), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 22:21:57,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1433 transitions. [2023-11-06 22:21:57,813 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1433 transitions. Word has length 145 [2023-11-06 22:21:57,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:21:57,814 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 1433 transitions. [2023-11-06 22:21:57,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:57,815 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1433 transitions. [2023-11-06 22:21:57,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-06 22:21:57,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:21:57,817 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:21:57,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:58,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:58,025 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:21:58,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:58,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1755669879, now seen corresponding path program 1 times [2023-11-06 22:21:58,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:58,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640283728] [2023-11-06 22:21:58,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:58,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:58,090 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:21:58,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657547814] [2023-11-06 22:21:58,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:58,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:58,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:58,092 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:58,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:21:58,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:58,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:21:58,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:58,577 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:21:58,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:58,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640283728] [2023-11-06 22:21:58,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:21:58,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657547814] [2023-11-06 22:21:58,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657547814] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:58,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:58,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:21:58,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765498766] [2023-11-06 22:21:58,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:58,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:21:58,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:58,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:21:58,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:21:58,580 INFO L87 Difference]: Start difference. First operand 948 states and 1433 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:58,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:21:58,704 INFO L93 Difference]: Finished difference Result 1879 states and 2849 transitions. [2023-11-06 22:21:58,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:21:58,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2023-11-06 22:21:58,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:21:58,716 INFO L225 Difference]: With dead ends: 1879 [2023-11-06 22:21:58,717 INFO L226 Difference]: Without dead ends: 935 [2023-11-06 22:21:58,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 142 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 22:21:58,721 INFO L413 NwaCegarLoop]: 1364 mSDtfsCounter, 165 mSDsluCounter, 2574 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 3938 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 22:21:58,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 3938 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:21:58,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2023-11-06 22:21:58,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 934. [2023-11-06 22:21:58,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 916 states have (on average 1.512008733624454) internal successors, (1385), 921 states have internal predecessors, (1385), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 22:21:58,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1412 transitions. [2023-11-06 22:21:58,759 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1412 transitions. Word has length 145 [2023-11-06 22:21:58,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:21:58,760 INFO L495 AbstractCegarLoop]: Abstraction has 934 states and 1412 transitions. [2023-11-06 22:21:58,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:58,760 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1412 transitions. [2023-11-06 22:21:58,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-06 22:21:58,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:21:58,766 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:21:58,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:58,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:58,973 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:21:58,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:58,974 INFO L85 PathProgramCache]: Analyzing trace with hash 834990341, now seen corresponding path program 1 times [2023-11-06 22:21:58,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:58,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224372267] [2023-11-06 22:21:58,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:58,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:59,029 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:21:59,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230101548] [2023-11-06 22:21:59,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:59,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:59,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:59,031 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:59,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:21:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:59,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:21:59,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:21:59,551 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:21:59,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:59,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224372267] [2023-11-06 22:21:59,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:21:59,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230101548] [2023-11-06 22:21:59,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230101548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:59,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:59,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:21:59,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612419540] [2023-11-06 22:21:59,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:59,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:21:59,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:59,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:21:59,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:21:59,554 INFO L87 Difference]: Start difference. First operand 934 states and 1412 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:59,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:21:59,675 INFO L93 Difference]: Finished difference Result 1433 states and 2181 transitions. [2023-11-06 22:21:59,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:21:59,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2023-11-06 22:21:59,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:21:59,685 INFO L225 Difference]: With dead ends: 1433 [2023-11-06 22:21:59,685 INFO L226 Difference]: Without dead ends: 921 [2023-11-06 22:21:59,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 142 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 22:21:59,689 INFO L413 NwaCegarLoop]: 1357 mSDtfsCounter, 165 mSDsluCounter, 2560 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 3917 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 22:21:59,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 3917 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:21:59,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-11-06 22:21:59,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 920. [2023-11-06 22:21:59,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 902 states have (on average 1.5121951219512195) internal successors, (1364), 907 states have internal predecessors, (1364), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 22:21:59,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1391 transitions. [2023-11-06 22:21:59,722 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1391 transitions. Word has length 145 [2023-11-06 22:21:59,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:21:59,723 INFO L495 AbstractCegarLoop]: Abstraction has 920 states and 1391 transitions. [2023-11-06 22:21:59,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:59,723 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1391 transitions. [2023-11-06 22:21:59,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-06 22:21:59,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:21:59,727 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:21:59,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:59,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:59,935 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:21:59,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:59,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1479826889, now seen corresponding path program 1 times [2023-11-06 22:21:59,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:59,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876674181] [2023-11-06 22:21:59,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:59,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:59,994 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:21:59,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856050483] [2023-11-06 22:21:59,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:59,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:59,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:59,996 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:59,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:22:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:00,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:22:00,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:00,704 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:22:00,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:00,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876674181] [2023-11-06 22:22:00,704 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:22:00,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856050483] [2023-11-06 22:22:00,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856050483] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:00,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:00,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:22:00,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033778623] [2023-11-06 22:22:00,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:00,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:22:00,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:00,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:22:00,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:22:00,707 INFO L87 Difference]: Start difference. First operand 920 states and 1391 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:00,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:22:00,850 INFO L93 Difference]: Finished difference Result 2377 states and 3611 transitions. [2023-11-06 22:22:00,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:22:00,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2023-11-06 22:22:00,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:22:00,860 INFO L225 Difference]: With dead ends: 2377 [2023-11-06 22:22:00,861 INFO L226 Difference]: Without dead ends: 1461 [2023-11-06 22:22:00,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 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 22:22:00,863 INFO L413 NwaCegarLoop]: 1552 mSDtfsCounter, 765 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 2901 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:22:00,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 2901 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:22:00,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2023-11-06 22:22:00,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1456. [2023-11-06 22:22:00,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1433 states have (on average 1.5212840195394277) internal successors, (2180), 1438 states have internal predecessors, (2180), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-06 22:22:00,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 2217 transitions. [2023-11-06 22:22:00,953 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 2217 transitions. Word has length 145 [2023-11-06 22:22:00,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:22:00,956 INFO L495 AbstractCegarLoop]: Abstraction has 1456 states and 2217 transitions. [2023-11-06 22:22:00,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:00,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 2217 transitions. [2023-11-06 22:22:00,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-11-06 22:22:00,961 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:22:00,962 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:22:00,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:01,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:01,170 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:22:01,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:01,170 INFO L85 PathProgramCache]: Analyzing trace with hash -24874315, now seen corresponding path program 1 times [2023-11-06 22:22:01,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:01,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109816005] [2023-11-06 22:22:01,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:01,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:01,232 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:22:01,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548834119] [2023-11-06 22:22:01,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:01,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:01,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:01,234 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:01,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:22:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:01,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:22:01,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:01,779 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:22:01,784 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 22:22:01,817 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:22:01,818 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 22:22:01,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:01,859 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 22:22:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:22:01,878 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:22:01,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:01,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109816005] [2023-11-06 22:22:01,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:22:01,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548834119] [2023-11-06 22:22:01,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548834119] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:01,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:01,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:22:01,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427110354] [2023-11-06 22:22:01,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:01,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:22:01,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:01,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:22:01,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:22:01,883 INFO L87 Difference]: Start difference. First operand 1456 states and 2217 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:22:03,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:22:03,157 INFO L93 Difference]: Finished difference Result 2737 states and 4171 transitions. [2023-11-06 22:22:03,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:22:03,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 160 [2023-11-06 22:22:03,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:22:03,167 INFO L225 Difference]: With dead ends: 2737 [2023-11-06 22:22:03,168 INFO L226 Difference]: Without dead ends: 1456 [2023-11-06 22:22:03,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:22:03,171 INFO L413 NwaCegarLoop]: 1353 mSDtfsCounter, 351 mSDsluCounter, 3782 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 5135 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:22:03,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 5135 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 22:22:03,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2023-11-06 22:22:03,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1456. [2023-11-06 22:22:03,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1433 states have (on average 1.520586182833217) internal successors, (2179), 1438 states have internal predecessors, (2179), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-06 22:22:03,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 2216 transitions. [2023-11-06 22:22:03,232 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 2216 transitions. Word has length 160 [2023-11-06 22:22:03,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:22:03,232 INFO L495 AbstractCegarLoop]: Abstraction has 1456 states and 2216 transitions. [2023-11-06 22:22:03,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:22:03,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 2216 transitions. [2023-11-06 22:22:03,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2023-11-06 22:22:03,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:22:03,237 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:22:03,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:03,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:03,445 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:22:03,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:03,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1774057576, now seen corresponding path program 1 times [2023-11-06 22:22:03,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:03,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117446757] [2023-11-06 22:22:03,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:03,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:03,577 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:22:03,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1514539623] [2023-11-06 22:22:03,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:03,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:03,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:03,579 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:03,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:22:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:04,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:22:04,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:22:04,266 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:22:04,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:04,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117446757] [2023-11-06 22:22:04,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:22:04,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514539623] [2023-11-06 22:22:04,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514539623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:04,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:04,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:22:04,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077922886] [2023-11-06 22:22:04,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:04,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:22:04,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:04,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:22:04,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:22:04,270 INFO L87 Difference]: Start difference. First operand 1456 states and 2216 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:22:04,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:22:04,382 INFO L93 Difference]: Finished difference Result 2900 states and 4410 transitions. [2023-11-06 22:22:04,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:22:04,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 231 [2023-11-06 22:22:04,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:22:04,392 INFO L225 Difference]: With dead ends: 2900 [2023-11-06 22:22:04,392 INFO L226 Difference]: Without dead ends: 1498 [2023-11-06 22:22:04,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 229 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 22:22:04,395 INFO L413 NwaCegarLoop]: 1357 mSDtfsCounter, 9 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2699 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 22:22:04,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 2699 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:22:04,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2023-11-06 22:22:04,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1496. [2023-11-06 22:22:04,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1473 states have (on average 1.5064494229463679) internal successors, (2219), 1478 states have internal predecessors, (2219), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-06 22:22:04,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 2256 transitions. [2023-11-06 22:22:04,448 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 2256 transitions. Word has length 231 [2023-11-06 22:22:04,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:22:04,449 INFO L495 AbstractCegarLoop]: Abstraction has 1496 states and 2256 transitions. [2023-11-06 22:22:04,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:22:04,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 2256 transitions. [2023-11-06 22:22:04,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2023-11-06 22:22:04,454 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:22:04,454 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:22:04,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:04,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 22:22:04,662 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:22:04,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:04,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1528249702, now seen corresponding path program 1 times [2023-11-06 22:22:04,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:04,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558255085] [2023-11-06 22:22:04,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:04,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:04,768 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:22:04,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86391286] [2023-11-06 22:22:04,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:04,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:04,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:04,770 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:04,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:22:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:05,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:22:05,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:22:05,507 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:22:05,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:05,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558255085] [2023-11-06 22:22:05,508 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:22:05,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86391286] [2023-11-06 22:22:05,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86391286] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:05,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:05,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:22:05,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617572478] [2023-11-06 22:22:05,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:05,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:22:05,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:05,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:22:05,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:22:05,514 INFO L87 Difference]: Start difference. First operand 1496 states and 2256 transitions. Second operand has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:22:05,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:22:05,629 INFO L93 Difference]: Finished difference Result 2894 states and 4375 transitions. [2023-11-06 22:22:05,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:22:05,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 231 [2023-11-06 22:22:05,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:22:05,639 INFO L225 Difference]: With dead ends: 2894 [2023-11-06 22:22:05,639 INFO L226 Difference]: Without dead ends: 1470 [2023-11-06 22:22:05,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 228 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 22:22:05,643 INFO L413 NwaCegarLoop]: 1350 mSDtfsCounter, 165 mSDsluCounter, 2546 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 3896 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 22:22:05,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 3896 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:22:05,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2023-11-06 22:22:05,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1468. [2023-11-06 22:22:05,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1445 states have (on average 1.5065743944636678) internal successors, (2177), 1450 states have internal predecessors, (2177), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-06 22:22:05,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 2214 transitions. [2023-11-06 22:22:05,696 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 2214 transitions. Word has length 231 [2023-11-06 22:22:05,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:22:05,697 INFO L495 AbstractCegarLoop]: Abstraction has 1468 states and 2214 transitions. [2023-11-06 22:22:05,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:22:05,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 2214 transitions. [2023-11-06 22:22:05,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2023-11-06 22:22:05,701 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:22:05,702 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:22:05,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:05,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:22:05,912 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:22:05,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:05,912 INFO L85 PathProgramCache]: Analyzing trace with hash 541071988, now seen corresponding path program 1 times [2023-11-06 22:22:05,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:05,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832137008] [2023-11-06 22:22:05,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:05,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:06,003 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:22:06,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350908063] [2023-11-06 22:22:06,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:06,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:06,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:06,005 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:06,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:22:06,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:06,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:22:06,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:06,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:22:06,907 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:22:06,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:06,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832137008] [2023-11-06 22:22:06,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:22:06,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350908063] [2023-11-06 22:22:06,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350908063] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:06,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:06,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:22:06,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171576552] [2023-11-06 22:22:06,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:06,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:22:06,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:06,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:22:06,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:22:06,911 INFO L87 Difference]: Start difference. First operand 1468 states and 2214 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:22:07,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:22:07,046 INFO L93 Difference]: Finished difference Result 3423 states and 5208 transitions. [2023-11-06 22:22:07,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:22:07,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 231 [2023-11-06 22:22:07,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:22:07,061 INFO L225 Difference]: With dead ends: 3423 [2023-11-06 22:22:07,061 INFO L226 Difference]: Without dead ends: 2086 [2023-11-06 22:22:07,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 229 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 22:22:07,064 INFO L413 NwaCegarLoop]: 1368 mSDtfsCounter, 725 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 2710 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:22:07,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 2710 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:22:07,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2023-11-06 22:22:07,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1831. [2023-11-06 22:22:07,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1805 states have (on average 1.5196675900277008) internal successors, (2743), 1810 states have internal predecessors, (2743), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-06 22:22:07,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 2786 transitions. [2023-11-06 22:22:07,137 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 2786 transitions. Word has length 231 [2023-11-06 22:22:07,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:22:07,137 INFO L495 AbstractCegarLoop]: Abstraction has 1831 states and 2786 transitions. [2023-11-06 22:22:07,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:22:07,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 2786 transitions. [2023-11-06 22:22:07,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2023-11-06 22:22:07,142 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:22:07,143 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:22:07,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:07,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:22:07,351 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:22:07,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:07,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1616393105, now seen corresponding path program 1 times [2023-11-06 22:22:07,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:07,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316064670] [2023-11-06 22:22:07,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:07,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:07,451 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:22:07,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569380683] [2023-11-06 22:22:07,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:07,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:07,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:07,453 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:07,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:22:08,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:08,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:22:08,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-06 22:22:08,553 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:22:08,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:08,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316064670] [2023-11-06 22:22:08,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:22:08,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569380683] [2023-11-06 22:22:08,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569380683] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:08,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:08,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:22:08,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933895189] [2023-11-06 22:22:08,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:08,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:22:08,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:08,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:22:08,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:22:08,557 INFO L87 Difference]: Start difference. First operand 1831 states and 2786 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:22:08,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:22:08,960 INFO L93 Difference]: Finished difference Result 2994 states and 4554 transitions. [2023-11-06 22:22:08,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:22:08,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 246 [2023-11-06 22:22:08,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:22:08,975 INFO L225 Difference]: With dead ends: 2994 [2023-11-06 22:22:08,976 INFO L226 Difference]: Without dead ends: 1457 [2023-11-06 22:22:08,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 244 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 22:22:08,979 INFO L413 NwaCegarLoop]: 1466 mSDtfsCounter, 2420 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2420 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:22:08,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2420 Valid, 1717 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:22:08,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2023-11-06 22:22:09,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1457. [2023-11-06 22:22:09,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1436 states have (on average 1.506267409470752) internal successors, (2163), 1441 states have internal predecessors, (2163), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-06 22:22:09,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 2196 transitions. [2023-11-06 22:22:09,069 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 2196 transitions. Word has length 246 [2023-11-06 22:22:09,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:22:09,070 INFO L495 AbstractCegarLoop]: Abstraction has 1457 states and 2196 transitions. [2023-11-06 22:22:09,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:22:09,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 2196 transitions. [2023-11-06 22:22:09,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-11-06 22:22:09,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:22:09,076 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:22:09,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:09,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:22:09,286 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:22:09,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:09,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1328233788, now seen corresponding path program 1 times [2023-11-06 22:22:09,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:09,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081112896] [2023-11-06 22:22:09,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:09,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:09,380 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:22:09,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629815198] [2023-11-06 22:22:09,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:09,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:09,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:09,382 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:09,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:22:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:10,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:22:10,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:10,640 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:22:11,070 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:22:11,070 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-06 22:22:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-06 22:22:11,289 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:22:11,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:11,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081112896] [2023-11-06 22:22:11,290 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:22:11,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629815198] [2023-11-06 22:22:11,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629815198] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:11,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:11,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-06 22:22:11,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742735009] [2023-11-06 22:22:11,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:11,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:22:11,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:11,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:22:11,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:22:11,294 INFO L87 Difference]: Start difference. First operand 1457 states and 2196 transitions. Second operand has 11 states, 11 states have (on average 21.454545454545453) internal successors, (236), 11 states have internal predecessors, (236), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-06 22:22:14,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:22:14,729 INFO L93 Difference]: Finished difference Result 2231 states and 3385 transitions. [2023-11-06 22:22:14,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:22:14,729 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 21.454545454545453) internal successors, (236), 11 states have internal predecessors, (236), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 256 [2023-11-06 22:22:14,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:22:14,739 INFO L225 Difference]: With dead ends: 2231 [2023-11-06 22:22:14,739 INFO L226 Difference]: Without dead ends: 1494 [2023-11-06 22:22:14,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:22:14,741 INFO L413 NwaCegarLoop]: 1327 mSDtfsCounter, 1207 mSDsluCounter, 8744 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 10071 SdHoareTripleChecker+Invalid, 1933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:22:14,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1212 Valid, 10071 Invalid, 1933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1932 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-06 22:22:14,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2023-11-06 22:22:14,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1489. [2023-11-06 22:22:14,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1468 states have (on average 1.4986376021798364) internal successors, (2200), 1473 states have internal predecessors, (2200), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-06 22:22:14,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 2233 transitions. [2023-11-06 22:22:14,798 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 2233 transitions. Word has length 256 [2023-11-06 22:22:14,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:22:14,799 INFO L495 AbstractCegarLoop]: Abstraction has 1489 states and 2233 transitions. [2023-11-06 22:22:14,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.454545454545453) internal successors, (236), 11 states have internal predecessors, (236), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-06 22:22:14,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 2233 transitions. [2023-11-06 22:22:14,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-11-06 22:22:14,804 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:22:14,805 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:22:14,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:15,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:22:15,016 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:22:15,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:15,017 INFO L85 PathProgramCache]: Analyzing trace with hash -452214782, now seen corresponding path program 1 times [2023-11-06 22:22:15,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:15,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027689215] [2023-11-06 22:22:15,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:15,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:15,123 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:22:15,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487943061] [2023-11-06 22:22:15,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:15,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:15,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:15,125 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:15,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:22:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:15,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 1243 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:22:15,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:16,035 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-06 22:22:16,035 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:22:16,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:16,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027689215] [2023-11-06 22:22:16,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:22:16,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487943061] [2023-11-06 22:22:16,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487943061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:16,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:16,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:22:16,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933182299] [2023-11-06 22:22:16,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:16,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:22:16,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:16,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:22:16,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:22:16,046 INFO L87 Difference]: Start difference. First operand 1489 states and 2233 transitions. Second operand has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-06 22:22:16,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:22:16,130 INFO L93 Difference]: Finished difference Result 2231 states and 3384 transitions. [2023-11-06 22:22:16,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:22:16,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 256 [2023-11-06 22:22:16,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:22:16,139 INFO L225 Difference]: With dead ends: 2231 [2023-11-06 22:22:16,139 INFO L226 Difference]: Without dead ends: 1412 [2023-11-06 22:22:16,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 253 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 22:22:16,142 INFO L413 NwaCegarLoop]: 1280 mSDtfsCounter, 77 mSDsluCounter, 2476 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 3756 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 22:22:16,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 3756 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:22:16,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2023-11-06 22:22:16,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2023-11-06 22:22:16,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1391 states have (on average 1.498921639108555) internal successors, (2085), 1396 states have internal predecessors, (2085), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-06 22:22:16,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2118 transitions. [2023-11-06 22:22:16,194 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2118 transitions. Word has length 256 [2023-11-06 22:22:16,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:22:16,194 INFO L495 AbstractCegarLoop]: Abstraction has 1412 states and 2118 transitions. [2023-11-06 22:22:16,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-06 22:22:16,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2118 transitions. [2023-11-06 22:22:16,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2023-11-06 22:22:16,204 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:22:16,204 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:22:16,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:16,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:22:16,419 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:22:16,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:16,419 INFO L85 PathProgramCache]: Analyzing trace with hash 2002857959, now seen corresponding path program 1 times [2023-11-06 22:22:16,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:16,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650544428] [2023-11-06 22:22:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:16,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:16,517 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:22:16,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821338964] [2023-11-06 22:22:16,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:16,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:16,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:16,519 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:16,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a8db979-3769-408c-a944-0d6dd9c6ed0c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:22:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:17,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 1246 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:22:17,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:18,180 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:22:18,182 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 22