./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d2a98d270a821b4275b6b35f502458543f3a892fcdda158c69925a18d34f6cf --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:50:11,132 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:50:11,261 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:50:11,276 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:50:11,276 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:50:11,318 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:50:11,320 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:50:11,321 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:50:11,322 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:50:11,329 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:50:11,330 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:50:11,330 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:50:11,331 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:50:11,333 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:50:11,333 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:50:11,334 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:50:11,334 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:50:11,335 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:50:11,335 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:50:11,335 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:50:11,336 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:50:11,337 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:50:11,337 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:50:11,338 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:50:11,338 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:50:11,339 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:50:11,339 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:50:11,340 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:50:11,340 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:11,341 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:50:11,342 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:50:11,343 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:50:11,343 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:50:11,343 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:50:11,343 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:50:11,344 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:50:11,344 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:50:11,344 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:50:11,344 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:50:11,345 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_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d2a98d270a821b4275b6b35f502458543f3a892fcdda158c69925a18d34f6cf [2023-11-19 07:50:11,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:50:11,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:50:11,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:50:11,678 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:50:11,679 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:50:11,680 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i [2023-11-19 07:50:14,896 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:50:15,313 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:50:15,314 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i [2023-11-19 07:50:15,348 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/data/bb2381042/6f241422e3164bdc83a50f6f50f24c51/FLAG2043a6656 [2023-11-19 07:50:15,361 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/data/bb2381042/6f241422e3164bdc83a50f6f50f24c51 [2023-11-19 07:50:15,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:50:15,365 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:50:15,367 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:15,367 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:50:15,372 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:50:15,373 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:15" (1/1) ... [2023-11-19 07:50:15,374 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56a8e0d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:15, skipping insertion in model container [2023-11-19 07:50:15,374 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:15" (1/1) ... [2023-11-19 07:50:15,446 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:50:16,048 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_bbee7d8e-58c5-47e6-b93b-be83a05cf264/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i[44118,44131] [2023-11-19 07:50:16,064 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_bbee7d8e-58c5-47e6-b93b-be83a05cf264/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i[44660,44673] [2023-11-19 07:50:16,223 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_bbee7d8e-58c5-47e6-b93b-be83a05cf264/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i[56247,56260] [2023-11-19 07:50:16,224 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_bbee7d8e-58c5-47e6-b93b-be83a05cf264/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i[56368,56381] [2023-11-19 07:50:16,255 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:16,284 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:50:16,322 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_bbee7d8e-58c5-47e6-b93b-be83a05cf264/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i[44118,44131] [2023-11-19 07:50:16,328 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_bbee7d8e-58c5-47e6-b93b-be83a05cf264/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i[44660,44673] [2023-11-19 07:50:16,397 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_bbee7d8e-58c5-47e6-b93b-be83a05cf264/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i[56247,56260] [2023-11-19 07:50:16,398 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_bbee7d8e-58c5-47e6-b93b-be83a05cf264/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i[56368,56381] [2023-11-19 07:50:16,411 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:16,492 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:50:16,500 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:50:16,500 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:16 WrapperNode [2023-11-19 07:50:16,500 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:16,502 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:16,502 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:50:16,502 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:50:16,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:16" (1/1) ... [2023-11-19 07:50:16,553 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:16" (1/1) ... [2023-11-19 07:50:16,677 INFO L138 Inliner]: procedures = 282, calls = 347, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1542 [2023-11-19 07:50:16,678 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:16,679 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:50:16,679 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:50:16,679 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:50:16,688 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:16" (1/1) ... [2023-11-19 07:50:16,689 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:16" (1/1) ... [2023-11-19 07:50:16,712 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:16" (1/1) ... [2023-11-19 07:50:16,728 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:16" (1/1) ... [2023-11-19 07:50:16,809 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:16" (1/1) ... [2023-11-19 07:50:16,843 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:16" (1/1) ... [2023-11-19 07:50:16,852 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:16" (1/1) ... [2023-11-19 07:50:16,875 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:16" (1/1) ... [2023-11-19 07:50:16,900 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:50:16,904 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:50:16,904 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:50:16,905 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:50:16,905 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:16" (1/1) ... [2023-11-19 07:50:16,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:16,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:16,942 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:16,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:50:16,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:50:16,992 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-19 07:50:16,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 07:50:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:50:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2023-11-19 07:50:16,995 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2023-11-19 07:50:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:50:16,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 07:50:16,996 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 07:50:16,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:50:16,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:50:16,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:50:16,997 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2023-11-19 07:50:16,997 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2023-11-19 07:50:16,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 07:50:16,997 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2023-11-19 07:50:16,997 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2023-11-19 07:50:16,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:50:16,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:50:16,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:50:17,262 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:50:17,264 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:50:19,167 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:50:19,182 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:50:19,182 INFO L302 CfgBuilder]: Removed 72 assume(true) statements. [2023-11-19 07:50:19,190 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:19 BoogieIcfgContainer [2023-11-19 07:50:19,190 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:50:19,193 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:50:19,193 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:50:19,197 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:50:19,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:50:15" (1/3) ... [2023-11-19 07:50:19,198 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c31772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:50:19, skipping insertion in model container [2023-11-19 07:50:19,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:16" (2/3) ... [2023-11-19 07:50:19,198 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c31772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:50:19, skipping insertion in model container [2023-11-19 07:50:19,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:19" (3/3) ... [2023-11-19 07:50:19,200 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test6-2.i [2023-11-19 07:50:19,220 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:50:19,221 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-19 07:50:19,287 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:50:19,299 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5dd869c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:50:19,299 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:50:19,306 INFO L276 IsEmpty]: Start isEmpty. Operand has 431 states, 407 states have (on average 1.660933660933661) internal successors, (676), 411 states have internal predecessors, (676), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-19 07:50:19,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 07:50:19,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:19,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:19,316 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:50:19,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:19,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1053908008, now seen corresponding path program 1 times [2023-11-19 07:50:19,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:19,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184691322] [2023-11-19 07:50:19,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:19,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:19,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:19,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184691322] [2023-11-19 07:50:19,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184691322] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:19,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:19,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:50:19,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624061017] [2023-11-19 07:50:19,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:19,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:50:19,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:19,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:50:19,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:50:19,591 INFO L87 Difference]: Start difference. First operand has 431 states, 407 states have (on average 1.660933660933661) internal successors, (676), 411 states have internal predecessors, (676), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:19,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:19,713 INFO L93 Difference]: Finished difference Result 857 states and 1422 transitions. [2023-11-19 07:50:19,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:50:19,715 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-19 07:50:19,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:19,738 INFO L225 Difference]: With dead ends: 857 [2023-11-19 07:50:19,738 INFO L226 Difference]: Without dead ends: 424 [2023-11-19 07:50:19,748 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 [2023-11-19 07:50:19,753 INFO L413 NwaCegarLoop]: 624 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, 624 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 [2023-11-19 07:50:19,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:50:19,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-11-19 07:50:19,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 424. [2023-11-19 07:50:19,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 401 states have (on average 1.4713216957605986) internal successors, (590), 405 states have internal predecessors, (590), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-19 07:50:19,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 620 transitions. [2023-11-19 07:50:19,878 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 620 transitions. Word has length 8 [2023-11-19 07:50:19,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:19,878 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 620 transitions. [2023-11-19 07:50:19,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:19,880 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 620 transitions. [2023-11-19 07:50:19,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 07:50:19,882 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:19,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:19,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:50:19,883 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:50:19,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:19,885 INFO L85 PathProgramCache]: Analyzing trace with hash -719765386, now seen corresponding path program 1 times [2023-11-19 07:50:19,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:19,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318560642] [2023-11-19 07:50:19,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:19,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:20,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:20,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:20,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318560642] [2023-11-19 07:50:20,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318560642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:20,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:20,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:50:20,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694371478] [2023-11-19 07:50:20,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:20,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:50:20,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:20,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:50:20,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:50:20,219 INFO L87 Difference]: Start difference. First operand 424 states and 620 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:20,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:20,855 INFO L93 Difference]: Finished difference Result 967 states and 1432 transitions. [2023-11-19 07:50:20,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:50:20,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-19 07:50:20,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:20,861 INFO L225 Difference]: With dead ends: 967 [2023-11-19 07:50:20,861 INFO L226 Difference]: Without dead ends: 737 [2023-11-19 07:50:20,862 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 [2023-11-19 07:50:20,864 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 453 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 1752 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:20,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 1752 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:50:20,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2023-11-19 07:50:20,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 426. [2023-11-19 07:50:20,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 403 states have (on average 1.468982630272953) internal successors, (592), 407 states have internal predecessors, (592), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-19 07:50:20,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 622 transitions. [2023-11-19 07:50:20,901 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 622 transitions. Word has length 10 [2023-11-19 07:50:20,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:20,902 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 622 transitions. [2023-11-19 07:50:20,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:20,902 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 622 transitions. [2023-11-19 07:50:20,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-19 07:50:20,907 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:20,907 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] [2023-11-19 07:50:20,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:50:20,909 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:50:20,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:20,910 INFO L85 PathProgramCache]: Analyzing trace with hash 512859417, now seen corresponding path program 1 times [2023-11-19 07:50:20,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:20,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421537955] [2023-11-19 07:50:20,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:20,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:20,974 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:20,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688955869] [2023-11-19 07:50:20,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:20,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:20,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:20,977 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:20,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:50:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:21,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:50:21,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:21,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:21,319 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:21,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:21,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421537955] [2023-11-19 07:50:21,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:21,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688955869] [2023-11-19 07:50:21,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688955869] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:21,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:21,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:50:21,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578111293] [2023-11-19 07:50:21,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:21,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:21,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:21,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:21,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:21,333 INFO L87 Difference]: Start difference. First operand 426 states and 622 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2023-11-19 07:50:21,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:21,449 INFO L93 Difference]: Finished difference Result 869 states and 1271 transitions. [2023-11-19 07:50:21,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:21,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 66 [2023-11-19 07:50:21,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:21,460 INFO L225 Difference]: With dead ends: 869 [2023-11-19 07:50:21,461 INFO L226 Difference]: Without dead ends: 447 [2023-11-19 07:50:21,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:21,465 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 9 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:21,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1185 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:50:21,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2023-11-19 07:50:21,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 446. [2023-11-19 07:50:21,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 423 states have (on average 1.446808510638298) internal successors, (612), 427 states have internal predecessors, (612), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-19 07:50:21,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 642 transitions. [2023-11-19 07:50:21,485 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 642 transitions. Word has length 66 [2023-11-19 07:50:21,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:21,485 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 642 transitions. [2023-11-19 07:50:21,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2023-11-19 07:50:21,486 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 642 transitions. [2023-11-19 07:50:21,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-19 07:50:21,498 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:21,498 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] [2023-11-19 07:50:21,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:21,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:21,720 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:50:21,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:21,720 INFO L85 PathProgramCache]: Analyzing trace with hash 264712923, now seen corresponding path program 1 times [2023-11-19 07:50:21,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:21,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132983312] [2023-11-19 07:50:21,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:21,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:21,756 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:21,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284135026] [2023-11-19 07:50:21,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:21,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:21,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:21,758 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:21,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:50:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:22,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:50:22,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:22,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:22,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:22,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:22,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132983312] [2023-11-19 07:50:22,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:22,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284135026] [2023-11-19 07:50:22,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284135026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:22,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:22,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:50:22,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600834164] [2023-11-19 07:50:22,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:22,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:50:22,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:22,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:50:22,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:50:22,073 INFO L87 Difference]: Start difference. First operand 446 states and 642 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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) [2023-11-19 07:50:22,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:22,182 INFO L93 Difference]: Finished difference Result 875 states and 1267 transitions. [2023-11-19 07:50:22,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:50:22,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 66 [2023-11-19 07:50:22,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:22,187 INFO L225 Difference]: With dead ends: 875 [2023-11-19 07:50:22,187 INFO L226 Difference]: Without dead ends: 433 [2023-11-19 07:50:22,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:50:22,191 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 165 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:22,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1625 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:50:22,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-11-19 07:50:22,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 432. [2023-11-19 07:50:22,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 409 states have (on average 1.4449877750611246) internal successors, (591), 413 states have internal predecessors, (591), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-19 07:50:22,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 621 transitions. [2023-11-19 07:50:22,214 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 621 transitions. Word has length 66 [2023-11-19 07:50:22,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:22,214 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 621 transitions. [2023-11-19 07:50:22,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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) [2023-11-19 07:50:22,215 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 621 transitions. [2023-11-19 07:50:22,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-19 07:50:22,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:22,217 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] [2023-11-19 07:50:22,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:22,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:22,431 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:50:22,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:22,432 INFO L85 PathProgramCache]: Analyzing trace with hash -30782195, now seen corresponding path program 1 times [2023-11-19 07:50:22,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:22,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944983916] [2023-11-19 07:50:22,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:22,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:22,496 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:22,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899894298] [2023-11-19 07:50:22,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:22,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:22,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:22,500 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:22,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:50:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:22,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:50:22,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:22,934 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:22,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:22,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944983916] [2023-11-19 07:50:22,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:22,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899894298] [2023-11-19 07:50:22,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899894298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:22,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:22,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 07:50:22,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364851466] [2023-11-19 07:50:22,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:22,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:50:22,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:22,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:50:22,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:50:22,938 INFO L87 Difference]: Start difference. First operand 432 states and 621 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 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) [2023-11-19 07:50:23,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:23,340 INFO L93 Difference]: Finished difference Result 909 states and 1304 transitions. [2023-11-19 07:50:23,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:50:23,341 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 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 66 [2023-11-19 07:50:23,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:23,344 INFO L225 Difference]: With dead ends: 909 [2023-11-19 07:50:23,345 INFO L226 Difference]: Without dead ends: 481 [2023-11-19 07:50:23,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:50:23,347 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 27 mSDsluCounter, 1633 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2230 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:23,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 2230 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:50:23,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2023-11-19 07:50:23,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 472. [2023-11-19 07:50:23,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 449 states have (on average 1.423162583518931) internal successors, (639), 453 states have internal predecessors, (639), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-19 07:50:23,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 669 transitions. [2023-11-19 07:50:23,364 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 669 transitions. Word has length 66 [2023-11-19 07:50:23,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:23,364 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 669 transitions. [2023-11-19 07:50:23,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 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) [2023-11-19 07:50:23,365 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 669 transitions. [2023-11-19 07:50:23,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-19 07:50:23,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:23,366 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] [2023-11-19 07:50:23,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:23,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:23,581 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:50:23,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:23,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1975731849, now seen corresponding path program 1 times [2023-11-19 07:50:23,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:23,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220892536] [2023-11-19 07:50:23,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:23,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:23,614 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:23,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433379620] [2023-11-19 07:50:23,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:23,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:23,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:23,616 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:23,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:50:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:23,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 07:50:23,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:23,933 INFO L378 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 [2023-11-19 07:50:23,983 INFO L349 Elim1Store]: treesize reduction 57, result has 23.0 percent of original size [2023-11-19 07:50:23,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2023-11-19 07:50:24,349 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:50:24,349 INFO L378 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 45 treesize of output 23 [2023-11-19 07:50:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:24,505 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:24,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:24,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220892536] [2023-11-19 07:50:24,505 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:24,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433379620] [2023-11-19 07:50:24,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433379620] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:24,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:24,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-19 07:50:24,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323446013] [2023-11-19 07:50:24,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:24,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:50:24,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:24,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:50:24,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:50:24,507 INFO L87 Difference]: Start difference. First operand 472 states and 669 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 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) [2023-11-19 07:50:26,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:26,612 INFO L93 Difference]: Finished difference Result 1314 states and 1878 transitions. [2023-11-19 07:50:26,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:50:26,612 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 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 67 [2023-11-19 07:50:26,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:26,620 INFO L225 Difference]: With dead ends: 1314 [2023-11-19 07:50:26,620 INFO L226 Difference]: Without dead ends: 846 [2023-11-19 07:50:26,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:50:26,623 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 697 mSDsluCounter, 2952 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 3564 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:26,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 3564 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-19 07:50:26,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2023-11-19 07:50:26,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 510. [2023-11-19 07:50:26,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 487 states have (on average 1.4004106776180698) internal successors, (682), 491 states have internal predecessors, (682), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-19 07:50:26,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 712 transitions. [2023-11-19 07:50:26,647 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 712 transitions. Word has length 67 [2023-11-19 07:50:26,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:26,648 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 712 transitions. [2023-11-19 07:50:26,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 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) [2023-11-19 07:50:26,648 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 712 transitions. [2023-11-19 07:50:26,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-19 07:50:26,649 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:26,650 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] [2023-11-19 07:50:26,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:26,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:26,865 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:50:26,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:26,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1895588725, now seen corresponding path program 1 times [2023-11-19 07:50:26,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:26,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005065962] [2023-11-19 07:50:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:26,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:26,902 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:26,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728836926] [2023-11-19 07:50:26,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:26,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:26,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:26,904 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:26,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:50:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:27,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:50:27,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:27,222 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:27,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:27,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005065962] [2023-11-19 07:50:27,223 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:27,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728836926] [2023-11-19 07:50:27,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728836926] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:27,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:27,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:50:27,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170089556] [2023-11-19 07:50:27,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:27,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:50:27,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:27,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:50:27,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:50:27,226 INFO L87 Difference]: Start difference. First operand 510 states and 712 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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) [2023-11-19 07:50:27,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:27,353 INFO L93 Difference]: Finished difference Result 1059 states and 1510 transitions. [2023-11-19 07:50:27,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:50:27,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 67 [2023-11-19 07:50:27,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:27,358 INFO L225 Difference]: With dead ends: 1059 [2023-11-19 07:50:27,358 INFO L226 Difference]: Without dead ends: 588 [2023-11-19 07:50:27,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:50:27,360 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 144 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1778 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:27,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 1778 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:50:27,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2023-11-19 07:50:27,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 510. [2023-11-19 07:50:27,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 487 states have (on average 1.3880903490759753) internal successors, (676), 491 states have internal predecessors, (676), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-19 07:50:27,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 706 transitions. [2023-11-19 07:50:27,379 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 706 transitions. Word has length 67 [2023-11-19 07:50:27,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:27,380 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 706 transitions. [2023-11-19 07:50:27,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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) [2023-11-19 07:50:27,380 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 706 transitions. [2023-11-19 07:50:27,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-19 07:50:27,381 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:27,381 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] [2023-11-19 07:50:27,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:27,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:27,609 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:50:27,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:27,610 INFO L85 PathProgramCache]: Analyzing trace with hash 670454676, now seen corresponding path program 1 times [2023-11-19 07:50:27,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:27,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872158235] [2023-11-19 07:50:27,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:27,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:27,639 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:27,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090384138] [2023-11-19 07:50:27,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:27,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:27,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:27,641 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:27,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:50:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:27,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 07:50:27,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:35,533 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:35,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:35,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872158235] [2023-11-19 07:50:35,533 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:35,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090384138] [2023-11-19 07:50:35,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090384138] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:35,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:35,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:50:35,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466488243] [2023-11-19 07:50:35,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:35,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:50:35,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:35,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:50:35,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:50:35,536 INFO L87 Difference]: Start difference. First operand 510 states and 706 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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) [2023-11-19 07:50:39,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-19 07:50:39,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:39,365 INFO L93 Difference]: Finished difference Result 989 states and 1386 transitions. [2023-11-19 07:50:39,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:50:39,366 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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 [2023-11-19 07:50:39,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:39,369 INFO L225 Difference]: With dead ends: 989 [2023-11-19 07:50:39,370 INFO L226 Difference]: Without dead ends: 521 [2023-11-19 07:50:39,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:50:39,371 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 16 mSDsluCounter, 2433 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3029 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:39,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3029 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-19 07:50:39,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2023-11-19 07:50:39,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 513. [2023-11-19 07:50:39,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 490 states have (on average 1.389795918367347) internal successors, (681), 494 states have internal predecessors, (681), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-19 07:50:39,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 711 transitions. [2023-11-19 07:50:39,392 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 711 transitions. Word has length 68 [2023-11-19 07:50:39,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:39,392 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 711 transitions. [2023-11-19 07:50:39,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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) [2023-11-19 07:50:39,393 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 711 transitions. [2023-11-19 07:50:39,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-19 07:50:39,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:39,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:39,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:39,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:50:39,617 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:50:39,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:39,617 INFO L85 PathProgramCache]: Analyzing trace with hash -2055728926, now seen corresponding path program 1 times [2023-11-19 07:50:39,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:39,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247719566] [2023-11-19 07:50:39,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:39,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:39,651 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:39,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271687323] [2023-11-19 07:50:39,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:39,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:39,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:39,653 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:39,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:50:39,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:39,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:50:39,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:40,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:40,031 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:40,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:40,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247719566] [2023-11-19 07:50:40,032 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:40,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271687323] [2023-11-19 07:50:40,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271687323] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:40,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:40,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:50:40,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350126552] [2023-11-19 07:50:40,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:40,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:50:40,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:40,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:50:40,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:50:40,035 INFO L87 Difference]: Start difference. First operand 513 states and 711 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 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) [2023-11-19 07:50:40,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:40,669 INFO L93 Difference]: Finished difference Result 1001 states and 1403 transitions. [2023-11-19 07:50:40,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:50:40,670 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 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 69 [2023-11-19 07:50:40,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:40,674 INFO L225 Difference]: With dead ends: 1001 [2023-11-19 07:50:40,674 INFO L226 Difference]: Without dead ends: 530 [2023-11-19 07:50:40,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:50:40,677 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 45 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 3108 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:40,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 3108 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:50:40,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2023-11-19 07:50:40,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 520. [2023-11-19 07:50:40,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 497 states have (on average 1.392354124748491) internal successors, (692), 501 states have internal predecessors, (692), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-19 07:50:40,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 722 transitions. [2023-11-19 07:50:40,704 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 722 transitions. Word has length 69 [2023-11-19 07:50:40,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:40,704 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 722 transitions. [2023-11-19 07:50:40,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 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) [2023-11-19 07:50:40,705 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 722 transitions. [2023-11-19 07:50:40,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-19 07:50:40,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:40,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:40,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:40,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:40,937 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:50:40,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:40,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1079502583, now seen corresponding path program 1 times [2023-11-19 07:50:40,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:40,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157827199] [2023-11-19 07:50:40,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:40,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:40,972 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:40,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1880812396] [2023-11-19 07:50:40,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:40,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:40,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:40,974 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:41,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:50:41,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:41,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:50:41,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:41,432 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:41,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:41,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157827199] [2023-11-19 07:50:41,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:41,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880812396] [2023-11-19 07:50:41,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880812396] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:41,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:41,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:50:41,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061930466] [2023-11-19 07:50:41,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:41,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:50:41,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:41,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:50:41,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:50:41,439 INFO L87 Difference]: Start difference. First operand 520 states and 722 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 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) [2023-11-19 07:50:42,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:42,128 INFO L93 Difference]: Finished difference Result 1004 states and 1409 transitions. [2023-11-19 07:50:42,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:50:42,128 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 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 69 [2023-11-19 07:50:42,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:42,138 INFO L225 Difference]: With dead ends: 1004 [2023-11-19 07:50:42,138 INFO L226 Difference]: Without dead ends: 526 [2023-11-19 07:50:42,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:50:42,140 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 15 mSDsluCounter, 2434 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 3035 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:42,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 3035 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:50:42,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-11-19 07:50:42,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 520. [2023-11-19 07:50:42,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 497 states have (on average 1.392354124748491) internal successors, (692), 501 states have internal predecessors, (692), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-19 07:50:42,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 722 transitions. [2023-11-19 07:50:42,161 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 722 transitions. Word has length 69 [2023-11-19 07:50:42,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:42,162 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 722 transitions. [2023-11-19 07:50:42,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 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) [2023-11-19 07:50:42,162 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 722 transitions. [2023-11-19 07:50:42,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-19 07:50:42,164 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:42,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:42,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:42,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:42,377 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:50:42,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:42,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1735023105, now seen corresponding path program 1 times [2023-11-19 07:50:42,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:42,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511228613] [2023-11-19 07:50:42,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:42,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:42,405 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:42,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788453869] [2023-11-19 07:50:42,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:42,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:42,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:42,406 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:42,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:50:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:42,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 07:50:42,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:43,324 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:43,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:43,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511228613] [2023-11-19 07:50:43,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:43,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788453869] [2023-11-19 07:50:43,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788453869] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:43,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:43,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-19 07:50:43,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239938702] [2023-11-19 07:50:43,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:43,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:50:43,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:43,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:50:43,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:50:43,327 INFO L87 Difference]: Start difference. First operand 520 states and 722 transitions. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 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) [2023-11-19 07:50:45,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 07:50:47,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-19 07:50:50,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:50,286 INFO L93 Difference]: Finished difference Result 1012 states and 1421 transitions. [2023-11-19 07:50:50,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:50:50,286 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 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 70 [2023-11-19 07:50:50,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:50,290 INFO L225 Difference]: With dead ends: 1012 [2023-11-19 07:50:50,290 INFO L226 Difference]: Without dead ends: 534 [2023-11-19 07:50:50,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:50:50,292 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 23 mSDsluCounter, 3938 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 4529 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:50,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 4529 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1044 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2023-11-19 07:50:50,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2023-11-19 07:50:50,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 531. [2023-11-19 07:50:50,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 508 states have (on average 1.389763779527559) internal successors, (706), 512 states have internal predecessors, (706), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-19 07:50:50,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 736 transitions. [2023-11-19 07:50:50,313 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 736 transitions. Word has length 70 [2023-11-19 07:50:50,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:50,313 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 736 transitions. [2023-11-19 07:50:50,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 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) [2023-11-19 07:50:50,314 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 736 transitions. [2023-11-19 07:50:50,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-19 07:50:50,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:50,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:50,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:50,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:50:50,535 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:50:50,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:50,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1768256155, now seen corresponding path program 1 times [2023-11-19 07:50:50,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:50,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071319963] [2023-11-19 07:50:50,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:50,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:50,570 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:50,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341486062] [2023-11-19 07:50:50,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:50,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:50,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:50,572 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:50,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:50:51,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:51,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:50:51,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:51,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:51,195 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:51,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:51,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071319963] [2023-11-19 07:50:51,196 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:51,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341486062] [2023-11-19 07:50:51,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341486062] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:51,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:51,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:50:51,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520887165] [2023-11-19 07:50:51,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:51,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:50:51,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:51,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:50:51,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:50:51,198 INFO L87 Difference]: Start difference. First operand 531 states and 736 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:51,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:51,290 INFO L93 Difference]: Finished difference Result 543 states and 748 transitions. [2023-11-19 07:50:51,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:50:51,291 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (2), 2 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 70 [2023-11-19 07:50:51,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:51,295 INFO L225 Difference]: With dead ends: 543 [2023-11-19 07:50:51,295 INFO L226 Difference]: Without dead ends: 541 [2023-11-19 07:50:51,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:50:51,297 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 13 mSDsluCounter, 2424 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3031 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:51,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3031 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:50:51,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2023-11-19 07:50:51,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2023-11-19 07:50:51,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 515 states have (on average 1.3864077669902912) internal successors, (714), 520 states have internal predecessors, (714), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-19 07:50:51,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 746 transitions. [2023-11-19 07:50:51,333 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 746 transitions. Word has length 70 [2023-11-19 07:50:51,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:51,333 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 746 transitions. [2023-11-19 07:50:51,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:51,334 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 746 transitions. [2023-11-19 07:50:51,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-19 07:50:51,336 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:51,336 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] [2023-11-19 07:50:51,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:51,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:50:51,556 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:50:51,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:51,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1746427879, now seen corresponding path program 1 times [2023-11-19 07:50:51,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:51,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421713116] [2023-11-19 07:50:51,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:51,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:51,598 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:51,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504343460] [2023-11-19 07:50:51,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:51,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:51,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:51,600 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:51,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:50:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:51,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:50:51,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:52,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:52,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:52,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:52,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421713116] [2023-11-19 07:50:52,301 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:52,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504343460] [2023-11-19 07:50:52,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504343460] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:52,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:50:52,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 9 [2023-11-19 07:50:52,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282760982] [2023-11-19 07:50:52,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:52,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:50:52,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:52,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:50:52,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:50:52,304 INFO L87 Difference]: Start difference. First operand 541 states and 746 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 6 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:50:52,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:52,586 INFO L93 Difference]: Finished difference Result 2179 states and 3083 transitions. [2023-11-19 07:50:52,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:50:52,587 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 6 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2023-11-19 07:50:52,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:52,599 INFO L225 Difference]: With dead ends: 2179 [2023-11-19 07:50:52,600 INFO L226 Difference]: Without dead ends: 1680 [2023-11-19 07:50:52,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 157 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:50:52,603 INFO L413 NwaCegarLoop]: 1615 mSDtfsCounter, 2231 mSDsluCounter, 2461 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2231 SdHoareTripleChecker+Valid, 4076 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:52,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2231 Valid, 4076 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:50:52,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2023-11-19 07:50:52,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1434. [2023-11-19 07:50:52,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1384 states have (on average 1.416184971098266) internal successors, (1960), 1392 states have internal predecessors, (1960), 33 states have call successors, (33), 13 states have call predecessors, (33), 13 states have return successors, (35), 28 states have call predecessors, (35), 33 states have call successors, (35) [2023-11-19 07:50:52,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 2028 transitions. [2023-11-19 07:50:52,666 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 2028 transitions. Word has length 85 [2023-11-19 07:50:52,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:52,667 INFO L495 AbstractCegarLoop]: Abstraction has 1434 states and 2028 transitions. [2023-11-19 07:50:52,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 6 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:50:52,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 2028 transitions. [2023-11-19 07:50:52,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-19 07:50:52,669 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:52,669 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:52,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:52,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:50:52,885 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:50:52,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:52,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1328330228, now seen corresponding path program 1 times [2023-11-19 07:50:52,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:52,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259806297] [2023-11-19 07:50:52,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:52,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:52,963 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:52,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126509973] [2023-11-19 07:50:52,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:52,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:52,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:52,967 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:52,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:50:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:53,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:50:53,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:53,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:53,333 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:53,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:53,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259806297] [2023-11-19 07:50:53,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:53,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126509973] [2023-11-19 07:50:53,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126509973] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:53,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:53,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:50:53,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383464356] [2023-11-19 07:50:53,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:53,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:53,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:53,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:53,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:53,336 INFO L87 Difference]: Start difference. First operand 1434 states and 2028 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2023-11-19 07:50:53,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:53,380 INFO L93 Difference]: Finished difference Result 2829 states and 4018 transitions. [2023-11-19 07:50:53,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:53,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 83 [2023-11-19 07:50:53,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:53,390 INFO L225 Difference]: With dead ends: 2829 [2023-11-19 07:50:53,390 INFO L226 Difference]: Without dead ends: 1437 [2023-11-19 07:50:53,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:53,394 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 0 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:53,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1219 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:50:53,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2023-11-19 07:50:53,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 1437. [2023-11-19 07:50:53,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1387 states have (on average 1.4152847873107426) internal successors, (1963), 1395 states have internal predecessors, (1963), 33 states have call successors, (33), 13 states have call predecessors, (33), 13 states have return successors, (35), 28 states have call predecessors, (35), 33 states have call successors, (35) [2023-11-19 07:50:53,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 2031 transitions. [2023-11-19 07:50:53,445 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 2031 transitions. Word has length 83 [2023-11-19 07:50:53,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:53,445 INFO L495 AbstractCegarLoop]: Abstraction has 1437 states and 2031 transitions. [2023-11-19 07:50:53,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2023-11-19 07:50:53,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 2031 transitions. [2023-11-19 07:50:53,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-19 07:50:53,447 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:53,447 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:53,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:53,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 07:50:53,670 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:50:53,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:53,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1721357238, now seen corresponding path program 1 times [2023-11-19 07:50:53,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:53,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87493333] [2023-11-19 07:50:53,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:53,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:53,728 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:53,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233373234] [2023-11-19 07:50:53,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:53,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:53,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:53,730 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:53,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:50:54,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:54,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:50:54,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:54,455 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:54,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:54,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87493333] [2023-11-19 07:50:54,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:54,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233373234] [2023-11-19 07:50:54,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233373234] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:54,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:54,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:50:54,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043275020] [2023-11-19 07:50:54,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:54,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:54,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:54,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:54,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:54,461 INFO L87 Difference]: Start difference. First operand 1437 states and 2031 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2023-11-19 07:50:54,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:54,717 INFO L93 Difference]: Finished difference Result 3289 states and 4741 transitions. [2023-11-19 07:50:54,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:54,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 83 [2023-11-19 07:50:54,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:54,731 INFO L225 Difference]: With dead ends: 3289 [2023-11-19 07:50:54,731 INFO L226 Difference]: Without dead ends: 1894 [2023-11-19 07:50:54,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:54,736 INFO L413 NwaCegarLoop]: 823 mSDtfsCounter, 388 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:54,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 1389 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:50:54,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2023-11-19 07:50:54,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1410. [2023-11-19 07:50:54,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1368 states have (on average 1.4444444444444444) internal successors, (1976), 1374 states have internal predecessors, (1976), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (29), 25 states have call predecessors, (29), 28 states have call successors, (29) [2023-11-19 07:50:54,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 2033 transitions. [2023-11-19 07:50:54,805 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 2033 transitions. Word has length 83 [2023-11-19 07:50:54,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:54,806 INFO L495 AbstractCegarLoop]: Abstraction has 1410 states and 2033 transitions. [2023-11-19 07:50:54,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2023-11-19 07:50:54,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 2033 transitions. [2023-11-19 07:50:54,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-19 07:50:54,809 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:54,809 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:54,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:55,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 07:50:55,032 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:50:55,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:55,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1051863405, now seen corresponding path program 1 times [2023-11-19 07:50:55,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:55,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331690472] [2023-11-19 07:50:55,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:55,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:55,089 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:55,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949105932] [2023-11-19 07:50:55,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:55,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:55,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:55,091 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:55,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 07:50:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:55,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:50:55,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:55,560 INFO L378 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 15 treesize of output 1 [2023-11-19 07:50:55,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-19 07:50:55,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 07:50:55,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:55,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:55,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331690472] [2023-11-19 07:50:55,578 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:55,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949105932] [2023-11-19 07:50:55,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949105932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:55,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:55,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:50:55,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653107231] [2023-11-19 07:50:55,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:55,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:50:55,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:55,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:50:55,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:50:55,582 INFO L87 Difference]: Start difference. First operand 1410 states and 2033 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 07:50:55,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:55,998 INFO L93 Difference]: Finished difference Result 1879 states and 2720 transitions. [2023-11-19 07:50:55,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:50:56,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 121 [2023-11-19 07:50:56,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:56,012 INFO L225 Difference]: With dead ends: 1879 [2023-11-19 07:50:56,012 INFO L226 Difference]: Without dead ends: 1772 [2023-11-19 07:50:56,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:50:56,015 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 249 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1734 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:56,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 1734 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:50:56,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2023-11-19 07:50:56,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1414. [2023-11-19 07:50:56,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1372 states have (on average 1.4431486880466473) internal successors, (1980), 1378 states have internal predecessors, (1980), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (29), 25 states have call predecessors, (29), 28 states have call successors, (29) [2023-11-19 07:50:56,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 2037 transitions. [2023-11-19 07:50:56,077 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 2037 transitions. Word has length 121 [2023-11-19 07:50:56,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:56,077 INFO L495 AbstractCegarLoop]: Abstraction has 1414 states and 2037 transitions. [2023-11-19 07:50:56,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 07:50:56,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 2037 transitions. [2023-11-19 07:50:56,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-19 07:50:56,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:56,081 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:56,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:56,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 07:50:56,305 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:50:56,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:56,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1803012474, now seen corresponding path program 1 times [2023-11-19 07:50:56,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:56,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499736157] [2023-11-19 07:50:56,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:56,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:56,386 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:56,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677670900] [2023-11-19 07:50:56,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:56,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:56,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:56,388 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:56,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-19 07:50:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:56,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:50:56,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 07:50:57,069 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:57,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:57,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499736157] [2023-11-19 07:50:57,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:57,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677670900] [2023-11-19 07:50:57,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677670900] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:57,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:57,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:50:57,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839212300] [2023-11-19 07:50:57,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:57,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:50:57,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:57,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:50:57,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:50:57,073 INFO L87 Difference]: Start difference. First operand 1414 states and 2037 transitions. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:50:57,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:57,272 INFO L93 Difference]: Finished difference Result 2629 states and 3801 transitions. [2023-11-19 07:50:57,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:50:57,273 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 132 [2023-11-19 07:50:57,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:57,281 INFO L225 Difference]: With dead ends: 2629 [2023-11-19 07:50:57,281 INFO L226 Difference]: Without dead ends: 1414 [2023-11-19 07:50:57,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:50:57,285 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 126 mSDsluCounter, 2302 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 2899 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:57,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 2899 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:50:57,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2023-11-19 07:50:57,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 1414. [2023-11-19 07:50:57,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1372 states have (on average 1.4431486880466473) internal successors, (1980), 1378 states have internal predecessors, (1980), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 25 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-19 07:50:57,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 2036 transitions. [2023-11-19 07:50:57,337 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 2036 transitions. Word has length 132 [2023-11-19 07:50:57,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:57,338 INFO L495 AbstractCegarLoop]: Abstraction has 1414 states and 2036 transitions. [2023-11-19 07:50:57,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:50:57,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 2036 transitions. [2023-11-19 07:50:57,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-19 07:50:57,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:57,340 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 07:50:57,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:57,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 07:50:57,553 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:50:57,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:57,554 INFO L85 PathProgramCache]: Analyzing trace with hash 550808294, now seen corresponding path program 1 times [2023-11-19 07:50:57,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:57,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466561720] [2023-11-19 07:50:57,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:57,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:57,615 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:57,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542008217] [2023-11-19 07:50:57,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:57,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:57,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:57,617 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:57,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-19 07:50:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:58,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 07:50:58,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:50:58,448 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:58,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:58,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466561720] [2023-11-19 07:50:58,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:58,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542008217] [2023-11-19 07:50:58,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542008217] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:58,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:58,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 07:50:58,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115951501] [2023-11-19 07:50:58,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:58,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:50:58,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:58,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:50:58,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:50:58,452 INFO L87 Difference]: Start difference. First operand 1414 states and 2036 transitions. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-19 07:50:58,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:58,685 INFO L93 Difference]: Finished difference Result 2637 states and 3812 transitions. [2023-11-19 07:50:58,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:50:58,686 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 137 [2023-11-19 07:50:58,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:58,696 INFO L225 Difference]: With dead ends: 2637 [2023-11-19 07:50:58,696 INFO L226 Difference]: Without dead ends: 1419 [2023-11-19 07:50:58,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:50:58,699 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 16 mSDsluCounter, 3559 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 4157 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:58,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 4157 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:50:58,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2023-11-19 07:50:58,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1419. [2023-11-19 07:50:58,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1376 states have (on average 1.4425872093023255) internal successors, (1985), 1383 states have internal predecessors, (1985), 28 states have call successors, (28), 10 states have call predecessors, (28), 11 states have return successors, (29), 25 states have call predecessors, (29), 28 states have call successors, (29) [2023-11-19 07:50:58,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 2042 transitions. [2023-11-19 07:50:58,761 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 2042 transitions. Word has length 137 [2023-11-19 07:50:58,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:58,762 INFO L495 AbstractCegarLoop]: Abstraction has 1419 states and 2042 transitions. [2023-11-19 07:50:58,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-19 07:50:58,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 2042 transitions. [2023-11-19 07:50:58,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-19 07:50:58,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:58,765 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 07:50:58,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:58,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-19 07:50:58,977 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:50:58,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:58,977 INFO L85 PathProgramCache]: Analyzing trace with hash 119825424, now seen corresponding path program 1 times [2023-11-19 07:50:58,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:58,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971737126] [2023-11-19 07:50:58,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:58,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:59,038 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:59,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100454632] [2023-11-19 07:50:59,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:59,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:59,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:59,040 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:59,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-19 07:50:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:59,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 07:50:59,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 07:50:59,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:00,043 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 07:51:00,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:00,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971737126] [2023-11-19 07:51:00,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:51:00,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100454632] [2023-11-19 07:51:00,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100454632] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:00,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:51:00,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2023-11-19 07:51:00,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840743754] [2023-11-19 07:51:00,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:00,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:51:00,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:00,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:51:00,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:51:00,047 INFO L87 Difference]: Start difference. First operand 1419 states and 2042 transitions. Second operand has 12 states, 12 states have (on average 11.166666666666666) internal successors, (134), 12 states have internal predecessors, (134), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-19 07:51:00,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:00,559 INFO L93 Difference]: Finished difference Result 2660 states and 3844 transitions. [2023-11-19 07:51:00,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 07:51:00,560 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 11.166666666666666) internal successors, (134), 12 states have internal predecessors, (134), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 139 [2023-11-19 07:51:00,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:00,570 INFO L225 Difference]: With dead ends: 2660 [2023-11-19 07:51:00,571 INFO L226 Difference]: Without dead ends: 1435 [2023-11-19 07:51:00,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:51:00,575 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 22 mSDsluCounter, 5333 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 5931 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:00,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 5931 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:51:00,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2023-11-19 07:51:00,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1432. [2023-11-19 07:51:00,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1388 states have (on average 1.4430835734870318) internal successors, (2003), 1395 states have internal predecessors, (2003), 28 states have call successors, (28), 11 states have call predecessors, (28), 12 states have return successors, (29), 25 states have call predecessors, (29), 28 states have call successors, (29) [2023-11-19 07:51:00,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 2060 transitions. [2023-11-19 07:51:00,648 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 2060 transitions. Word has length 139 [2023-11-19 07:51:00,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:00,648 INFO L495 AbstractCegarLoop]: Abstraction has 1432 states and 2060 transitions. [2023-11-19 07:51:00,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.166666666666666) internal successors, (134), 12 states have internal predecessors, (134), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-19 07:51:00,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 2060 transitions. [2023-11-19 07:51:00,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-19 07:51:00,651 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:00,652 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 07:51:00,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:00,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:00,873 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:51:00,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:00,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1932779398, now seen corresponding path program 2 times [2023-11-19 07:51:00,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:00,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288367726] [2023-11-19 07:51:00,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:00,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:00,947 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:51:00,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909850984] [2023-11-19 07:51:00,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:51:00,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:00,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:00,949 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:00,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbee7d8e-58c5-47e6-b93b-be83a05cf264/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process