./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl --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 c7b5cea41c34641368705a00e3051c009f6877551b3530b7d4fceaf386f5f58c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:27:28,754 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:27:28,876 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:27:28,888 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:27:28,888 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:27:28,935 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:27:28,935 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:27:28,936 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:27:28,937 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:27:28,943 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:27:28,944 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:27:28,945 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:27:28,946 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:27:28,948 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:27:28,948 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:27:28,949 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:27:28,949 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:27:28,949 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:27:28,950 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:27:28,951 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:27:28,951 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:27:28,952 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:27:28,952 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:27:28,953 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:27:28,953 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:27:28,954 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:27:28,954 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:27:28,955 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:27:28,955 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:27:28,956 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:27:28,957 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:27:28,958 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:27:28,958 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:27:28,958 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:27:28,959 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:27:28,959 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:27:28,959 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:27:28,959 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:27:28,983 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:27:28,983 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_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7b5cea41c34641368705a00e3051c009f6877551b3530b7d4fceaf386f5f58c [2023-11-12 02:27:29,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:27:29,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:27:29,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:27:29,395 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:27:29,410 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:27:29,412 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i [2023-11-12 02:27:32,538 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:27:32,932 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:27:32,933 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i [2023-11-12 02:27:32,968 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/data/6f4646e5b/d232b1c9ab5b44498191f7c6361cdba1/FLAG9e84c6d29 [2023-11-12 02:27:32,998 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/data/6f4646e5b/d232b1c9ab5b44498191f7c6361cdba1 [2023-11-12 02:27:33,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:27:33,003 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:27:33,004 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:27:33,004 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:27:33,011 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:27:33,015 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:27:33" (1/1) ... [2023-11-12 02:27:33,016 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bc13e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:33, skipping insertion in model container [2023-11-12 02:27:33,016 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:27:33" (1/1) ... [2023-11-12 02:27:33,088 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:27:33,542 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_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i[33021,33034] [2023-11-12 02:27:33,700 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_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i[49681,49694] [2023-11-12 02:27:33,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:27:33,738 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:27:33,776 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_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i[33021,33034] [2023-11-12 02:27:33,853 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_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i[49681,49694] [2023-11-12 02:27:33,858 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:27:33,917 WARN L672 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:27:33,925 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:27:33,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:33 WrapperNode [2023-11-12 02:27:33,926 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:27:33,928 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:27:33,928 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:27:33,928 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:27:33,937 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:33" (1/1) ... [2023-11-12 02:27:34,014 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:33" (1/1) ... [2023-11-12 02:27:34,152 INFO L138 Inliner]: procedures = 177, calls = 388, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1895 [2023-11-12 02:27:34,153 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:27:34,154 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:27:34,154 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:27:34,154 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:27:34,164 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:33" (1/1) ... [2023-11-12 02:27:34,165 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:33" (1/1) ... [2023-11-12 02:27:34,176 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:33" (1/1) ... [2023-11-12 02:27:34,177 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:33" (1/1) ... [2023-11-12 02:27:34,255 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:33" (1/1) ... [2023-11-12 02:27:34,297 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:33" (1/1) ... [2023-11-12 02:27:34,305 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:33" (1/1) ... [2023-11-12 02:27:34,326 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:33" (1/1) ... [2023-11-12 02:27:34,343 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:27:34,344 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:27:34,345 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:27:34,346 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:27:34,347 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:33" (1/1) ... [2023-11-12 02:27:34,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:27:34,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:34,383 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:27:34,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:27:34,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:27:34,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 02:27:34,432 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 02:27:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:27:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-12 02:27:34,432 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-12 02:27:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:27:34,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:27:34,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 02:27:34,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:27:34,435 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-12 02:27:34,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 02:27:34,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:27:34,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:27:34,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:27:34,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:27:34,816 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:27:34,819 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:27:37,173 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:27:37,193 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:27:37,193 INFO L302 CfgBuilder]: Removed 83 assume(true) statements. [2023-11-12 02:27:37,197 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:27:37 BoogieIcfgContainer [2023-11-12 02:27:37,198 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:27:37,201 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:27:37,201 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:27:37,205 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:27:37,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:27:33" (1/3) ... [2023-11-12 02:27:37,207 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bcac903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:27:37, skipping insertion in model container [2023-11-12 02:27:37,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:33" (2/3) ... [2023-11-12 02:27:37,209 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bcac903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:27:37, skipping insertion in model container [2023-11-12 02:27:37,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:27:37" (3/3) ... [2023-11-12 02:27:37,212 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test5-1.i [2023-11-12 02:27:37,232 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:27:37,232 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 02:27:37,323 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:27:37,331 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;@773dd83c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:27:37,332 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:27:37,341 INFO L276 IsEmpty]: Start isEmpty. Operand has 506 states, 490 states have (on average 1.7040816326530612) internal successors, (835), 497 states have internal predecessors, (835), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-12 02:27:37,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 02:27:37,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:37,348 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:37,349 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:37,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:37,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1359726925, now seen corresponding path program 1 times [2023-11-12 02:27:37,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:37,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523538448] [2023-11-12 02:27:37,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:37,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:37,500 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:37,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508794238] [2023-11-12 02:27:37,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:37,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:37,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:37,507 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:37,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:27:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:37,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:27:37,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:37,782 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:37,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:37,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523538448] [2023-11-12 02:27:37,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:37,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508794238] [2023-11-12 02:27:37,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508794238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:37,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:37,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:27:37,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576985098] [2023-11-12 02:27:37,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:37,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:27:37,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:37,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:27:37,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:27:37,844 INFO L87 Difference]: Start difference. First operand has 506 states, 490 states have (on average 1.7040816326530612) internal successors, (835), 497 states have internal predecessors, (835), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:37,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:37,994 INFO L93 Difference]: Finished difference Result 1010 states and 1717 transitions. [2023-11-12 02:27:37,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:27:37,996 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 [2023-11-12 02:27:37,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:38,019 INFO L225 Difference]: With dead ends: 1010 [2023-11-12 02:27:38,019 INFO L226 Difference]: Without dead ends: 502 [2023-11-12 02:27:38,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:27:38,029 INFO L413 NwaCegarLoop]: 765 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, 765 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 [2023-11-12 02:27:38,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:27:38,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2023-11-12 02:27:38,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 502. [2023-11-12 02:27:38,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 487 states have (on average 1.517453798767967) internal successors, (739), 493 states have internal predecessors, (739), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-12 02:27:38,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 761 transitions. [2023-11-12 02:27:38,136 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 761 transitions. Word has length 8 [2023-11-12 02:27:38,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:38,136 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 761 transitions. [2023-11-12 02:27:38,137 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) [2023-11-12 02:27:38,137 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 761 transitions. [2023-11-12 02:27:38,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-12 02:27:38,148 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:38,148 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] [2023-11-12 02:27:38,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:38,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:27:38,354 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:38,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:38,355 INFO L85 PathProgramCache]: Analyzing trace with hash 424830232, now seen corresponding path program 1 times [2023-11-12 02:27:38,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:38,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791103398] [2023-11-12 02:27:38,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:38,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:38,404 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:38,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504675683] [2023-11-12 02:27:38,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:38,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:38,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:38,413 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:38,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:27:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:38,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:27:38,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:38,708 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:38,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:38,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791103398] [2023-11-12 02:27:38,709 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:38,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504675683] [2023-11-12 02:27:38,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504675683] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:38,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:38,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:27:38,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083701786] [2023-11-12 02:27:38,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:38,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:27:38,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:38,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:27:38,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:38,713 INFO L87 Difference]: Start difference. First operand 502 states and 761 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2023-11-12 02:27:38,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:38,794 INFO L93 Difference]: Finished difference Result 1147 states and 1750 transitions. [2023-11-12 02:27:38,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:27:38,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 62 [2023-11-12 02:27:38,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:38,805 INFO L225 Difference]: With dead ends: 1147 [2023-11-12 02:27:38,806 INFO L226 Difference]: Without dead ends: 991 [2023-11-12 02:27:38,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:38,809 INFO L413 NwaCegarLoop]: 758 mSDtfsCounter, 724 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:38,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 1511 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:27:38,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2023-11-12 02:27:38,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 503. [2023-11-12 02:27:38,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 488 states have (on average 1.5163934426229508) internal successors, (740), 494 states have internal predecessors, (740), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-12 02:27:38,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 762 transitions. [2023-11-12 02:27:38,840 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 762 transitions. Word has length 62 [2023-11-12 02:27:38,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:38,841 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 762 transitions. [2023-11-12 02:27:38,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2023-11-12 02:27:38,841 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 762 transitions. [2023-11-12 02:27:38,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-11-12 02:27:38,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:38,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:38,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:39,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:39,054 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:39,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:39,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1358157445, now seen corresponding path program 1 times [2023-11-12 02:27:39,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:39,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223253508] [2023-11-12 02:27:39,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:39,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:39,174 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:39,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662680466] [2023-11-12 02:27:39,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:39,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:39,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:39,177 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:39,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:27:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:39,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:27:39,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:39,749 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:39,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:39,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223253508] [2023-11-12 02:27:39,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:39,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662680466] [2023-11-12 02:27:39,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662680466] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:39,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:39,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:27:39,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324960415] [2023-11-12 02:27:39,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:39,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:27:39,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:39,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:27:39,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:39,755 INFO L87 Difference]: Start difference. First operand 503 states and 762 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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) [2023-11-12 02:27:39,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:39,858 INFO L93 Difference]: Finished difference Result 1024 states and 1552 transitions. [2023-11-12 02:27:39,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:27:39,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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 208 [2023-11-12 02:27:39,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:39,864 INFO L225 Difference]: With dead ends: 1024 [2023-11-12 02:27:39,864 INFO L226 Difference]: Without dead ends: 524 [2023-11-12 02:27:39,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:39,868 INFO L413 NwaCegarLoop]: 741 mSDtfsCounter, 9 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1467 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 [2023-11-12 02:27:39,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1467 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:27:39,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2023-11-12 02:27:39,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 523. [2023-11-12 02:27:39,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 508 states have (on average 1.4960629921259843) internal successors, (760), 514 states have internal predecessors, (760), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-12 02:27:39,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 782 transitions. [2023-11-12 02:27:39,898 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 782 transitions. Word has length 208 [2023-11-12 02:27:39,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:39,900 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 782 transitions. [2023-11-12 02:27:39,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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) [2023-11-12 02:27:39,904 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 782 transitions. [2023-11-12 02:27:39,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-11-12 02:27:39,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:39,911 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:39,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:40,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:40,119 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:40,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:40,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1845231171, now seen corresponding path program 1 times [2023-11-12 02:27:40,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:40,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882599753] [2023-11-12 02:27:40,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:40,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:40,262 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:40,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082063047] [2023-11-12 02:27:40,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:40,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:40,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:40,275 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:40,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:27:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:40,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:27:40,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:40,855 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:40,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:40,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882599753] [2023-11-12 02:27:40,856 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:40,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082063047] [2023-11-12 02:27:40,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082063047] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:40,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:40,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:27:40,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616383590] [2023-11-12 02:27:40,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:40,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:27:40,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:40,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:27:40,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:40,859 INFO L87 Difference]: Start difference. First operand 523 states and 782 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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) [2023-11-12 02:27:40,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:40,980 INFO L93 Difference]: Finished difference Result 1064 states and 1592 transitions. [2023-11-12 02:27:40,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:27:40,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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 208 [2023-11-12 02:27:40,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:40,989 INFO L225 Difference]: With dead ends: 1064 [2023-11-12 02:27:40,989 INFO L226 Difference]: Without dead ends: 544 [2023-11-12 02:27:40,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:40,996 INFO L413 NwaCegarLoop]: 741 mSDtfsCounter, 9 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1467 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 [2023-11-12 02:27:40,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1467 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:27:40,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2023-11-12 02:27:41,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 543. [2023-11-12 02:27:41,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 528 states have (on average 1.4772727272727273) internal successors, (780), 534 states have internal predecessors, (780), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-12 02:27:41,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 802 transitions. [2023-11-12 02:27:41,012 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 802 transitions. Word has length 208 [2023-11-12 02:27:41,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:41,013 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 802 transitions. [2023-11-12 02:27:41,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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) [2023-11-12 02:27:41,014 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 802 transitions. [2023-11-12 02:27:41,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-11-12 02:27:41,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:41,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:41,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:41,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:41,226 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:41,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:41,226 INFO L85 PathProgramCache]: Analyzing trace with hash -197868229, now seen corresponding path program 1 times [2023-11-12 02:27:41,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:41,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300573332] [2023-11-12 02:27:41,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:41,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:41,334 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:41,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604876991] [2023-11-12 02:27:41,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:41,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:41,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:41,336 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:41,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:27:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:41,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:27:41,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:27:41,912 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:41,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:41,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300573332] [2023-11-12 02:27:41,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:41,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604876991] [2023-11-12 02:27:41,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604876991] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:41,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:41,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:27:41,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662198665] [2023-11-12 02:27:41,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:41,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:27:41,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:41,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:27:41,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:41,916 INFO L87 Difference]: Start difference. First operand 543 states and 802 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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) [2023-11-12 02:27:42,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:42,028 INFO L93 Difference]: Finished difference Result 719 states and 1072 transitions. [2023-11-12 02:27:42,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:27:42,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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 208 [2023-11-12 02:27:42,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:42,037 INFO L225 Difference]: With dead ends: 719 [2023-11-12 02:27:42,037 INFO L226 Difference]: Without dead ends: 564 [2023-11-12 02:27:42,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:42,039 INFO L413 NwaCegarLoop]: 741 mSDtfsCounter, 9 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1467 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 [2023-11-12 02:27:42,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1467 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:27:42,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2023-11-12 02:27:42,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 563. [2023-11-12 02:27:42,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 548 states have (on average 1.4598540145985401) internal successors, (800), 554 states have internal predecessors, (800), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-12 02:27:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 822 transitions. [2023-11-12 02:27:42,064 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 822 transitions. Word has length 208 [2023-11-12 02:27:42,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:42,065 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 822 transitions. [2023-11-12 02:27:42,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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) [2023-11-12 02:27:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 822 transitions. [2023-11-12 02:27:42,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-11-12 02:27:42,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:42,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:42,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:42,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:42,277 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:42,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:42,277 INFO L85 PathProgramCache]: Analyzing trace with hash 106953023, now seen corresponding path program 1 times [2023-11-12 02:27:42,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:42,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384479465] [2023-11-12 02:27:42,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:42,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:42,394 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:42,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644561815] [2023-11-12 02:27:42,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:42,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:42,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:42,396 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:42,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:27:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:42,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:27:42,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:42,909 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:42,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:42,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384479465] [2023-11-12 02:27:42,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:42,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644561815] [2023-11-12 02:27:42,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644561815] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:42,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:42,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:27:42,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526190585] [2023-11-12 02:27:42,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:42,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:27:42,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:42,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:27:42,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:27:42,912 INFO L87 Difference]: Start difference. First operand 563 states and 822 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 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) [2023-11-12 02:27:43,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:43,017 INFO L93 Difference]: Finished difference Result 1110 states and 1628 transitions. [2023-11-12 02:27:43,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:27:43,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 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 208 [2023-11-12 02:27:43,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:43,022 INFO L225 Difference]: With dead ends: 1110 [2023-11-12 02:27:43,022 INFO L226 Difference]: Without dead ends: 550 [2023-11-12 02:27:43,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:27:43,024 INFO L413 NwaCegarLoop]: 734 mSDtfsCounter, 165 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 2048 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 [2023-11-12 02:27:43,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 2048 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:27:43,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2023-11-12 02:27:43,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 549. [2023-11-12 02:27:43,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 534 states have (on average 1.4588014981273407) internal successors, (779), 540 states have internal predecessors, (779), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-12 02:27:43,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 801 transitions. [2023-11-12 02:27:43,043 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 801 transitions. Word has length 208 [2023-11-12 02:27:43,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:43,043 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 801 transitions. [2023-11-12 02:27:43,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 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) [2023-11-12 02:27:43,044 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 801 transitions. [2023-11-12 02:27:43,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-11-12 02:27:43,047 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:43,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:43,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:43,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:27:43,255 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:43,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:43,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1905832079, now seen corresponding path program 1 times [2023-11-12 02:27:43,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:43,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964909255] [2023-11-12 02:27:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:43,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:43,393 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:43,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351791687] [2023-11-12 02:27:43,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:43,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:43,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:43,394 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:43,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:27:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:43,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:27:43,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:43,982 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:43,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:43,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964909255] [2023-11-12 02:27:43,982 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:43,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351791687] [2023-11-12 02:27:43,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351791687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:43,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:43,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:27:43,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976097798] [2023-11-12 02:27:43,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:43,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:27:43,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:43,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:27:43,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:27:43,985 INFO L87 Difference]: Start difference. First operand 549 states and 801 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 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) [2023-11-12 02:27:44,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:44,097 INFO L93 Difference]: Finished difference Result 1082 states and 1586 transitions. [2023-11-12 02:27:44,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:27:44,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 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 208 [2023-11-12 02:27:44,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:44,102 INFO L225 Difference]: With dead ends: 1082 [2023-11-12 02:27:44,102 INFO L226 Difference]: Without dead ends: 536 [2023-11-12 02:27:44,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:27:44,104 INFO L413 NwaCegarLoop]: 727 mSDtfsCounter, 165 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 2027 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 [2023-11-12 02:27:44,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 2027 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:27:44,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2023-11-12 02:27:44,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 535. [2023-11-12 02:27:44,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 520 states have (on average 1.4576923076923076) internal successors, (758), 526 states have internal predecessors, (758), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-12 02:27:44,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 780 transitions. [2023-11-12 02:27:44,123 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 780 transitions. Word has length 208 [2023-11-12 02:27:44,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:44,124 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 780 transitions. [2023-11-12 02:27:44,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 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) [2023-11-12 02:27:44,124 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 780 transitions. [2023-11-12 02:27:44,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-11-12 02:27:44,127 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:44,127 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:44,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:44,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:27:44,337 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:44,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:44,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1522670975, now seen corresponding path program 1 times [2023-11-12 02:27:44,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:44,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649601081] [2023-11-12 02:27:44,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:44,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:44,444 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:44,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305216096] [2023-11-12 02:27:44,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:44,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:44,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:44,453 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:44,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:27:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:45,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:27:45,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:27:45,045 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:45,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:45,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649601081] [2023-11-12 02:27:45,045 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:45,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305216096] [2023-11-12 02:27:45,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305216096] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:45,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:45,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:27:45,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773563754] [2023-11-12 02:27:45,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:45,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:27:45,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:45,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:27:45,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:27:45,049 INFO L87 Difference]: Start difference. First operand 535 states and 780 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 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) [2023-11-12 02:27:45,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:45,155 INFO L93 Difference]: Finished difference Result 697 states and 1026 transitions. [2023-11-12 02:27:45,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:27:45,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 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 208 [2023-11-12 02:27:45,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:45,160 INFO L225 Difference]: With dead ends: 697 [2023-11-12 02:27:45,161 INFO L226 Difference]: Without dead ends: 522 [2023-11-12 02:27:45,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:27:45,162 INFO L413 NwaCegarLoop]: 720 mSDtfsCounter, 165 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 2006 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 [2023-11-12 02:27:45,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 2006 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:27:45,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2023-11-12 02:27:45,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 521. [2023-11-12 02:27:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 506 states have (on average 1.4565217391304348) internal successors, (737), 512 states have internal predecessors, (737), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-12 02:27:45,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 759 transitions. [2023-11-12 02:27:45,181 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 759 transitions. Word has length 208 [2023-11-12 02:27:45,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:45,182 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 759 transitions. [2023-11-12 02:27:45,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 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) [2023-11-12 02:27:45,182 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 759 transitions. [2023-11-12 02:27:45,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-11-12 02:27:45,186 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:45,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:45,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:45,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:45,392 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:45,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:45,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1020650447, now seen corresponding path program 1 times [2023-11-12 02:27:45,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:45,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786398854] [2023-11-12 02:27:45,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:45,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:45,478 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:45,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694940718] [2023-11-12 02:27:45,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:45,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:45,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:45,479 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:45,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:27:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:46,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:27:46,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:46,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:27:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:46,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:46,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786398854] [2023-11-12 02:27:46,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:46,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694940718] [2023-11-12 02:27:46,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694940718] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:27:46,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:27:46,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-12 02:27:46,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630479802] [2023-11-12 02:27:46,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:27:46,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:27:46,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:46,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:27:46,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:27:46,661 INFO L87 Difference]: Start difference. First operand 521 states and 759 transitions. Second operand has 6 states, 6 states have (on average 59.333333333333336) internal successors, (356), 6 states have internal predecessors, (356), 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) [2023-11-12 02:27:46,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:46,895 INFO L93 Difference]: Finished difference Result 2049 states and 3003 transitions. [2023-11-12 02:27:46,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:27:46,896 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 59.333333333333336) internal successors, (356), 6 states have internal predecessors, (356), 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 208 [2023-11-12 02:27:46,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:46,908 INFO L225 Difference]: With dead ends: 2049 [2023-11-12 02:27:46,908 INFO L226 Difference]: Without dead ends: 1887 [2023-11-12 02:27:46,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:27:46,910 INFO L413 NwaCegarLoop]: 871 mSDtfsCounter, 3418 mSDsluCounter, 2190 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3457 SdHoareTripleChecker+Valid, 3061 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:46,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3457 Valid, 3061 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:27:46,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2023-11-12 02:27:46,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1577. [2023-11-12 02:27:46,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1544 states have (on average 1.4488341968911918) internal successors, (2237), 1550 states have internal predecessors, (2237), 29 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 25 states have call predecessors, (29), 29 states have call successors, (29) [2023-11-12 02:27:46,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 2295 transitions. [2023-11-12 02:27:46,972 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 2295 transitions. Word has length 208 [2023-11-12 02:27:46,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:46,973 INFO L495 AbstractCegarLoop]: Abstraction has 1577 states and 2295 transitions. [2023-11-12 02:27:46,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.333333333333336) internal successors, (356), 6 states have internal predecessors, (356), 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) [2023-11-12 02:27:46,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 2295 transitions. [2023-11-12 02:27:46,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2023-11-12 02:27:46,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:46,992 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:47,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:47,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:47,202 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:47,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:47,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1103488806, now seen corresponding path program 2 times [2023-11-12 02:27:47,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:47,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936739616] [2023-11-12 02:27:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:47,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:47,460 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:47,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137175486] [2023-11-12 02:27:47,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:27:47,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:47,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:47,462 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:47,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:27:48,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:27:48,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:27:48,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 02:27:48,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:48,480 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2023-11-12 02:27:48,480 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:48,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:48,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936739616] [2023-11-12 02:27:48,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:48,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137175486] [2023-11-12 02:27:48,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137175486] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:48,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:48,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:27:48,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967441452] [2023-11-12 02:27:48,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:48,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:27:48,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:48,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:27:48,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:27:48,484 INFO L87 Difference]: Start difference. First operand 1577 states and 2295 transitions. Second operand has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 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) [2023-11-12 02:27:49,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:49,095 INFO L93 Difference]: Finished difference Result 1787 states and 2599 transitions. [2023-11-12 02:27:49,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:27:49,097 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 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 646 [2023-11-12 02:27:49,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:49,109 INFO L225 Difference]: With dead ends: 1787 [2023-11-12 02:27:49,110 INFO L226 Difference]: Without dead ends: 1626 [2023-11-12 02:27:49,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 645 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:27:49,112 INFO L413 NwaCegarLoop]: 724 mSDtfsCounter, 23 mSDsluCounter, 3193 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 3917 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:49,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 3917 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:27:49,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2023-11-12 02:27:49,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1617. [2023-11-12 02:27:49,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1584 states have (on average 1.442550505050505) internal successors, (2285), 1590 states have internal predecessors, (2285), 29 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 25 states have call predecessors, (29), 29 states have call successors, (29) [2023-11-12 02:27:49,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 2343 transitions. [2023-11-12 02:27:49,181 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 2343 transitions. Word has length 646 [2023-11-12 02:27:49,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:49,182 INFO L495 AbstractCegarLoop]: Abstraction has 1617 states and 2343 transitions. [2023-11-12 02:27:49,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 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) [2023-11-12 02:27:49,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 2343 transitions. [2023-11-12 02:27:49,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 648 [2023-11-12 02:27:49,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:49,209 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:49,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:49,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:49,417 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:49,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:49,417 INFO L85 PathProgramCache]: Analyzing trace with hash 2136240720, now seen corresponding path program 1 times [2023-11-12 02:27:49,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:49,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679385396] [2023-11-12 02:27:49,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:49,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:49,698 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:49,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11343289] [2023-11-12 02:27:49,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:49,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:49,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:49,700 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:49,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:27:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:51,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 2902 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:27:51,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 0 proven. 880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:51,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:27:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 0 proven. 880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:52,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:52,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679385396] [2023-11-12 02:27:52,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:52,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11343289] [2023-11-12 02:27:52,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11343289] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:27:52,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:27:52,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-12 02:27:52,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296157969] [2023-11-12 02:27:52,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:27:52,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:27:52,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:52,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:27:52,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:27:52,857 INFO L87 Difference]: Start difference. First operand 1617 states and 2343 transitions. Second operand has 12 states, 12 states have (on average 102.75) internal successors, (1233), 12 states have internal predecessors, (1233), 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) [2023-11-12 02:27:53,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:53,568 INFO L93 Difference]: Finished difference Result 4906 states and 7113 transitions. [2023-11-12 02:27:53,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:27:53,569 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 102.75) internal successors, (1233), 12 states have internal predecessors, (1233), 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 647 [2023-11-12 02:27:53,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:53,602 INFO L225 Difference]: With dead ends: 4906 [2023-11-12 02:27:53,602 INFO L226 Difference]: Without dead ends: 4704 [2023-11-12 02:27:53,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1292 GetRequests, 1282 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:27:53,607 INFO L413 NwaCegarLoop]: 907 mSDtfsCounter, 9241 mSDsluCounter, 6473 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9331 SdHoareTripleChecker+Valid, 7380 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:53,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9331 Valid, 7380 Invalid, 231 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [57 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:27:53,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4704 states. [2023-11-12 02:27:53,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4704 to 3729. [2023-11-12 02:27:53,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3729 states, 3660 states have (on average 1.4439890710382515) internal successors, (5285), 3666 states have internal predecessors, (5285), 65 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (65), 61 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-12 02:27:53,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3729 states to 3729 states and 5415 transitions. [2023-11-12 02:27:53,756 INFO L78 Accepts]: Start accepts. Automaton has 3729 states and 5415 transitions. Word has length 647 [2023-11-12 02:27:53,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:53,757 INFO L495 AbstractCegarLoop]: Abstraction has 3729 states and 5415 transitions. [2023-11-12 02:27:53,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 102.75) internal successors, (1233), 12 states have internal predecessors, (1233), 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) [2023-11-12 02:27:53,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3729 states and 5415 transitions. [2023-11-12 02:27:53,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1524 [2023-11-12 02:27:53,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:53,795 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:53,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:54,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:54,017 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:54,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:54,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1510638974, now seen corresponding path program 2 times [2023-11-12 02:27:54,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:54,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467474418] [2023-11-12 02:27:54,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:54,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:54,750 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:54,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567051932] [2023-11-12 02:27:54,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:27:54,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:54,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:54,755 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:54,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:27:56,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:27:56,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:27:56,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:27:56,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6580 trivial. 0 not checked. [2023-11-12 02:27:56,629 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:56,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:56,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467474418] [2023-11-12 02:27:56,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:56,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567051932] [2023-11-12 02:27:56,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567051932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:56,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:56,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:27:56,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592129873] [2023-11-12 02:27:56,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:56,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:27:56,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:56,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:27:56,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:27:56,634 INFO L87 Difference]: Start difference. First operand 3729 states and 5415 transitions. Second operand has 7 states, 7 states have (on average 29.857142857142858) internal successors, (209), 7 states have internal predecessors, (209), 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) [2023-11-12 02:27:57,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:57,431 INFO L93 Difference]: Finished difference Result 3948 states and 5729 transitions. [2023-11-12 02:27:57,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:27:57,432 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 29.857142857142858) internal successors, (209), 7 states have internal predecessors, (209), 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 1523 [2023-11-12 02:27:57,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:57,456 INFO L225 Difference]: With dead ends: 3948 [2023-11-12 02:27:57,456 INFO L226 Difference]: Without dead ends: 3747 [2023-11-12 02:27:57,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1525 GetRequests, 1517 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:27:57,459 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 47 mSDsluCounter, 3151 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 3868 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:57,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 3868 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 02:27:57,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3747 states. [2023-11-12 02:27:57,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3747 to 3739. [2023-11-12 02:27:57,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3739 states, 3670 states have (on average 1.4444141689373298) internal successors, (5301), 3676 states have internal predecessors, (5301), 65 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (65), 61 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-12 02:27:57,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 5431 transitions. [2023-11-12 02:27:57,597 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 5431 transitions. Word has length 1523 [2023-11-12 02:27:57,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:57,599 INFO L495 AbstractCegarLoop]: Abstraction has 3739 states and 5431 transitions. [2023-11-12 02:27:57,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 29.857142857142858) internal successors, (209), 7 states have internal predecessors, (209), 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) [2023-11-12 02:27:57,600 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 5431 transitions. [2023-11-12 02:27:57,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1525 [2023-11-12 02:27:57,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:57,628 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:57,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:57,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:57,840 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:57,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:57,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1586590103, now seen corresponding path program 1 times [2023-11-12 02:27:57,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:57,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223507079] [2023-11-12 02:27:57,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:57,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:58,502 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:58,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983303965] [2023-11-12 02:27:58,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:58,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:58,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:58,505 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:58,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:28:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:01,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 6959 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:28:01,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:28:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 1135 proven. 0 refuted. 0 times theorem prover too weak. 5445 trivial. 0 not checked. [2023-11-12 02:28:02,440 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:28:02,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:02,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223507079] [2023-11-12 02:28:02,441 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:28:02,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983303965] [2023-11-12 02:28:02,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983303965] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:02,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:02,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:28:02,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014235261] [2023-11-12 02:28:02,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:02,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:02,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:02,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:02,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:02,446 INFO L87 Difference]: Start difference. First operand 3739 states and 5431 transitions. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 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) [2023-11-12 02:28:02,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:28:02,566 INFO L93 Difference]: Finished difference Result 7358 states and 10684 transitions. [2023-11-12 02:28:02,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:28:02,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 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 1524 [2023-11-12 02:28:02,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:28:02,590 INFO L225 Difference]: With dead ends: 7358 [2023-11-12 02:28:02,590 INFO L226 Difference]: Without dead ends: 3922 [2023-11-12 02:28:02,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1523 GetRequests, 1522 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:02,597 INFO L413 NwaCegarLoop]: 908 mSDtfsCounter, 481 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:28:02,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 1626 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:28:02,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3922 states. [2023-11-12 02:28:02,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3922 to 3920. [2023-11-12 02:28:02,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3846 states have (on average 1.4443577743109723) internal successors, (5555), 3857 states have internal predecessors, (5555), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 62 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-12 02:28:02,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 5695 transitions. [2023-11-12 02:28:02,742 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 5695 transitions. Word has length 1524 [2023-11-12 02:28:02,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:28:02,743 INFO L495 AbstractCegarLoop]: Abstraction has 3920 states and 5695 transitions. [2023-11-12 02:28:02,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 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) [2023-11-12 02:28:02,744 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 5695 transitions. [2023-11-12 02:28:02,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1540 [2023-11-12 02:28:02,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:28:02,795 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:28:02,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:28:03,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:03,011 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:28:03,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:03,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1960831852, now seen corresponding path program 1 times [2023-11-12 02:28:03,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:03,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802452812] [2023-11-12 02:28:03,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:03,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:03,725 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:28:03,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046975000] [2023-11-12 02:28:03,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:03,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:03,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:03,731 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:28:03,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:28:07,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:07,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 7106 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:28:07,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:28:07,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6566 backedges. 496 proven. 0 refuted. 0 times theorem prover too weak. 6070 trivial. 0 not checked. [2023-11-12 02:28:07,340 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:28:07,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:07,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802452812] [2023-11-12 02:28:07,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:28:07,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046975000] [2023-11-12 02:28:07,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046975000] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:07,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:07,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:28:07,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400399852] [2023-11-12 02:28:07,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:07,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:07,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:07,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:07,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:07,347 INFO L87 Difference]: Start difference. First operand 3920 states and 5695 transitions. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 02:28:07,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:28:07,455 INFO L93 Difference]: Finished difference Result 7709 states and 11197 transitions. [2023-11-12 02:28:07,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:28:07,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 1539 [2023-11-12 02:28:07,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:28:07,491 INFO L225 Difference]: With dead ends: 7709 [2023-11-12 02:28:07,491 INFO L226 Difference]: Without dead ends: 3918 [2023-11-12 02:28:07,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1538 GetRequests, 1537 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:07,498 INFO L413 NwaCegarLoop]: 739 mSDtfsCounter, 123 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1463 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:28:07,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 1463 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:28:07,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3918 states. [2023-11-12 02:28:07,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3918 to 3918. [2023-11-12 02:28:07,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3844 states have (on average 1.4443288241415193) internal successors, (5552), 3855 states have internal predecessors, (5552), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 62 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-12 02:28:07,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 5692 transitions. [2023-11-12 02:28:07,694 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 5692 transitions. Word has length 1539 [2023-11-12 02:28:07,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:28:07,694 INFO L495 AbstractCegarLoop]: Abstraction has 3918 states and 5692 transitions. [2023-11-12 02:28:07,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 02:28:07,695 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 5692 transitions. [2023-11-12 02:28:07,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1555 [2023-11-12 02:28:07,743 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:28:07,744 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:28:07,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-12 02:28:07,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:07,967 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:28:07,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:07,969 INFO L85 PathProgramCache]: Analyzing trace with hash -402706675, now seen corresponding path program 1 times [2023-11-12 02:28:07,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:07,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413355920] [2023-11-12 02:28:07,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:07,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:08,681 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:28:08,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760342458] [2023-11-12 02:28:08,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:08,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:08,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:08,688 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:28:08,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-12 02:28:12,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:12,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 7253 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:28:12,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:28:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6568 backedges. 2164 proven. 0 refuted. 0 times theorem prover too weak. 4404 trivial. 0 not checked. [2023-11-12 02:28:17,175 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:28:17,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:17,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413355920] [2023-11-12 02:28:17,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:28:17,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760342458] [2023-11-12 02:28:17,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760342458] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:17,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:17,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:28:17,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286873456] [2023-11-12 02:28:17,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:17,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:17,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:17,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:17,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:17,181 INFO L87 Difference]: Start difference. First operand 3918 states and 5692 transitions. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 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) [2023-11-12 02:28:17,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:28:17,357 INFO L93 Difference]: Finished difference Result 9787 states and 14233 transitions. [2023-11-12 02:28:17,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:28:17,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 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 1554 [2023-11-12 02:28:17,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:28:17,392 INFO L225 Difference]: With dead ends: 9787 [2023-11-12 02:28:17,392 INFO L226 Difference]: Without dead ends: 6865 [2023-11-12 02:28:17,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1553 GetRequests, 1552 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:17,400 INFO L413 NwaCegarLoop]: 1176 mSDtfsCounter, 496 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:28:17,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 1881 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:28:17,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6865 states. [2023-11-12 02:28:17,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6865 to 6863. [2023-11-12 02:28:17,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6863 states, 6756 states have (on average 1.4474541148608644) internal successors, (9779), 6767 states have internal predecessors, (9779), 103 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (103), 95 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-12 02:28:17,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6863 states to 6863 states and 9985 transitions. [2023-11-12 02:28:17,681 INFO L78 Accepts]: Start accepts. Automaton has 6863 states and 9985 transitions. Word has length 1554 [2023-11-12 02:28:17,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:28:17,684 INFO L495 AbstractCegarLoop]: Abstraction has 6863 states and 9985 transitions. [2023-11-12 02:28:17,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 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) [2023-11-12 02:28:17,684 INFO L276 IsEmpty]: Start isEmpty. Operand 6863 states and 9985 transitions. [2023-11-12 02:28:17,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1565 [2023-11-12 02:28:17,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:28:17,721 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:28:17,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-12 02:28:17,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:17,936 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:28:17,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:17,939 INFO L85 PathProgramCache]: Analyzing trace with hash 251020000, now seen corresponding path program 1 times [2023-11-12 02:28:17,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:17,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650551962] [2023-11-12 02:28:17,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:17,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:18,504 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:28:18,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753896074] [2023-11-12 02:28:18,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:18,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:18,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:18,507 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:28:18,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a448a7-95c2-49f0-8d2b-89ddd4a964d8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process