./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI --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 eb2eb63835edf753d5a467feb7a4cdd6d105155177d7d0cab8bf29c1b74dbaf6 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:57:49,997 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:57:50,110 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:57:50,120 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:57:50,121 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:57:50,162 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:57:50,162 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:57:50,163 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:57:50,164 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:57:50,169 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:57:50,170 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:57:50,170 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:57:50,171 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:57:50,173 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:57:50,173 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:57:50,174 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:57:50,174 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:57:50,174 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:57:50,175 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:57:50,175 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:57:50,176 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:57:50,176 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:57:50,177 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:57:50,177 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:57:50,177 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:57:50,178 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:57:50,178 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:57:50,179 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:57:50,180 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:57:50,180 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:57:50,181 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:57:50,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:57:50,182 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:57:50,182 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:57:50,183 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:57:50,183 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:57:50,183 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:57:50,183 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:57:50,184 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:57:50,184 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:57:50,184 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:57:50,184 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:57:50,185 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_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb2eb63835edf753d5a467feb7a4cdd6d105155177d7d0cab8bf29c1b74dbaf6 [2023-11-24 21:57:50,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:57:50,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:57:50,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:57:50,504 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:57:50,504 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:57:50,506 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-1.i [2023-11-24 21:57:53,718 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:57:54,111 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:57:54,111 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-1.i [2023-11-24 21:57:54,133 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/data/d25b47327/e77a94bd6e5641fabb56452084fc1078/FLAG06aa426c5 [2023-11-24 21:57:54,163 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/data/d25b47327/e77a94bd6e5641fabb56452084fc1078 [2023-11-24 21:57:54,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:57:54,174 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:57:54,176 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:57:54,176 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:57:54,181 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:57:54,186 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:57:54" (1/1) ... [2023-11-24 21:57:54,187 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58f91241 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:54, skipping insertion in model container [2023-11-24 21:57:54,187 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:57:54" (1/1) ... [2023-11-24 21:57:54,263 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:57:54,749 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_d1cca754-8bbd-4562-a33b-690b84e44000/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-1.i[33021,33034] [2023-11-24 21:57:54,936 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_d1cca754-8bbd-4562-a33b-690b84e44000/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-1.i[44590,44603] [2023-11-24 21:57:54,962 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:57:54,972 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:57:55,030 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_d1cca754-8bbd-4562-a33b-690b84e44000/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-1.i[33021,33034] [2023-11-24 21:57:55,082 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_d1cca754-8bbd-4562-a33b-690b84e44000/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-1.i[44590,44603] [2023-11-24 21:57:55,096 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:57:55,140 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:57:55,148 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:57:55,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:55 WrapperNode [2023-11-24 21:57:55,150 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:57:55,151 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:57:55,151 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:57:55,152 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:57:55,160 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:55" (1/1) ... [2023-11-24 21:57:55,228 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:55" (1/1) ... [2023-11-24 21:57:55,328 INFO L138 Inliner]: procedures = 177, calls = 285, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1359 [2023-11-24 21:57:55,329 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:57:55,330 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:57:55,330 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:57:55,331 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:57:55,342 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:55" (1/1) ... [2023-11-24 21:57:55,342 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:55" (1/1) ... [2023-11-24 21:57:55,353 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:55" (1/1) ... [2023-11-24 21:57:55,461 INFO L175 MemorySlicer]: Split 260 memory accesses to 4 slices as follows [2, 219, 5, 34]. 84 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 55 writes are split as follows [0, 50, 1, 4]. [2023-11-24 21:57:55,461 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:55" (1/1) ... [2023-11-24 21:57:55,462 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:55" (1/1) ... [2023-11-24 21:57:55,509 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:55" (1/1) ... [2023-11-24 21:57:55,523 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:55" (1/1) ... [2023-11-24 21:57:55,532 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:55" (1/1) ... [2023-11-24 21:57:55,540 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:55" (1/1) ... [2023-11-24 21:57:55,555 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:57:55,557 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:57:55,557 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:57:55,557 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:57:55,558 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:55" (1/1) ... [2023-11-24 21:57:55,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:57:55,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:55,619 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:57:55,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:57:55,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:57:55,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:57:55,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:57:55,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:57:55,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 21:57:55,670 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 21:57:55,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:57:55,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:57:55,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:57:55,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:57:55,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2023-11-24 21:57:55,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2023-11-24 21:57:55,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2023-11-24 21:57:55,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#3 [2023-11-24 21:57:55,672 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2023-11-24 21:57:55,673 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2023-11-24 21:57:55,673 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2023-11-24 21:57:55,673 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#3 [2023-11-24 21:57:55,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:57:55,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:57:55,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 21:57:55,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 21:57:55,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 21:57:55,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-24 21:57:55,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:57:55,676 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-24 21:57:55,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:57:55,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 21:57:55,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 21:57:55,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-24 21:57:55,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:57:55,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:57:55,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:57:55,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:57:55,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:57:55,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:57:55,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:57:55,939 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:57:55,943 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:57:57,526 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:57:57,574 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:57:57,574 INFO L309 CfgBuilder]: Removed 63 assume(true) statements. [2023-11-24 21:57:57,575 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:57:57 BoogieIcfgContainer [2023-11-24 21:57:57,575 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:57:57,577 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:57:57,578 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:57:57,581 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:57:57,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:57:54" (1/3) ... [2023-11-24 21:57:57,582 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ce3d83e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:57:57, skipping insertion in model container [2023-11-24 21:57:57,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:55" (2/3) ... [2023-11-24 21:57:57,582 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ce3d83e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:57:57, skipping insertion in model container [2023-11-24 21:57:57,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:57:57" (3/3) ... [2023-11-24 21:57:57,587 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_BER_test3-1.i [2023-11-24 21:57:57,607 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:57:57,607 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-24 21:57:57,694 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:57:57,699 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;@3556c828, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:57:57,700 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-24 21:57:57,706 INFO L276 IsEmpty]: Start isEmpty. Operand has 364 states, 351 states have (on average 1.7094017094017093) internal successors, (600), 358 states have internal predecessors, (600), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 21:57:57,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 21:57:57,714 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:57,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:57,715 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:57:57,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:57,721 INFO L85 PathProgramCache]: Analyzing trace with hash 748092104, now seen corresponding path program 1 times [2023-11-24 21:57:57,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:57,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695816698] [2023-11-24 21:57:57,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:57,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:57,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:57,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695816698] [2023-11-24 21:57:57,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695816698] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:57,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:57,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:57:57,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279657465] [2023-11-24 21:57:57,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:57,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 21:57:57,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:57,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 21:57:57,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:57:57,975 INFO L87 Difference]: Start difference. First operand has 364 states, 351 states have (on average 1.7094017094017093) internal successors, (600), 358 states have internal predecessors, (600), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) 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) [2023-11-24 21:57:58,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:58,067 INFO L93 Difference]: Finished difference Result 727 states and 1236 transitions. [2023-11-24 21:57:58,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 21:57:58,070 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 [2023-11-24 21:57:58,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:58,084 INFO L225 Difference]: With dead ends: 727 [2023-11-24 21:57:58,084 INFO L226 Difference]: Without dead ends: 362 [2023-11-24 21:57:58,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:57:58,093 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:58,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 543 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:57:58,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2023-11-24 21:57:58,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 362. [2023-11-24 21:57:58,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 350 states have (on average 1.5114285714285713) internal successors, (529), 356 states have internal predecessors, (529), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 21:57:58,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 545 transitions. [2023-11-24 21:57:58,162 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 545 transitions. Word has length 8 [2023-11-24 21:57:58,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:58,162 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 545 transitions. [2023-11-24 21:57:58,163 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) [2023-11-24 21:57:58,163 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 545 transitions. [2023-11-24 21:57:58,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 21:57:58,164 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:58,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:58,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:57:58,165 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:57:58,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:58,166 INFO L85 PathProgramCache]: Analyzing trace with hash -689841617, now seen corresponding path program 1 times [2023-11-24 21:57:58,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:58,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859550398] [2023-11-24 21:57:58,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:58,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:58,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:58,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859550398] [2023-11-24 21:57:58,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859550398] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:58,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:58,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:57:58,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904663726] [2023-11-24 21:57:58,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:58,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:57:58,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:58,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:57:58,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:57:58,432 INFO L87 Difference]: Start difference. First operand 362 states and 545 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:58,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:58,648 INFO L93 Difference]: Finished difference Result 898 states and 1360 transitions. [2023-11-24 21:57:58,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:57:58,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-24 21:57:58,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:58,654 INFO L225 Difference]: With dead ends: 898 [2023-11-24 21:57:58,655 INFO L226 Difference]: Without dead ends: 713 [2023-11-24 21:57:58,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:57:58,657 INFO L413 NwaCegarLoop]: 565 mSDtfsCounter, 516 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 1644 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:58,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 1644 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:57:58,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2023-11-24 21:57:58,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 364. [2023-11-24 21:57:58,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 352 states have (on average 1.5085227272727273) internal successors, (531), 358 states have internal predecessors, (531), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 21:57:58,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 547 transitions. [2023-11-24 21:57:58,687 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 547 transitions. Word has length 13 [2023-11-24 21:57:58,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:58,688 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 547 transitions. [2023-11-24 21:57:58,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:58,688 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 547 transitions. [2023-11-24 21:57:58,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-24 21:57:58,693 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:58,693 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:58,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:57:58,694 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:57:58,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:58,694 INFO L85 PathProgramCache]: Analyzing trace with hash -160991869, now seen corresponding path program 1 times [2023-11-24 21:57:58,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:58,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874590864] [2023-11-24 21:57:58,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:58,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:58,758 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:57:58,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568280729] [2023-11-24 21:57:58,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:58,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:58,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:58,762 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:58,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:57:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:59,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:57:59,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:59,212 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:57:59,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:59,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874590864] [2023-11-24 21:57:59,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:57:59,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568280729] [2023-11-24 21:57:59,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568280729] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:59,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:59,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:57:59,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487230132] [2023-11-24 21:57:59,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:59,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:57:59,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:59,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:57:59,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:57:59,223 INFO L87 Difference]: Start difference. First operand 364 states and 547 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:59,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:59,336 INFO L93 Difference]: Finished difference Result 746 states and 1122 transitions. [2023-11-24 21:57:59,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:57:59,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2023-11-24 21:57:59,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:59,341 INFO L225 Difference]: With dead ends: 746 [2023-11-24 21:57:59,341 INFO L226 Difference]: Without dead ends: 385 [2023-11-24 21:57:59,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:57:59,346 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 9 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:59,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1030 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:57:59,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2023-11-24 21:57:59,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 384. [2023-11-24 21:57:59,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 372 states have (on average 1.4811827956989247) internal successors, (551), 378 states have internal predecessors, (551), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 21:57:59,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 567 transitions. [2023-11-24 21:57:59,376 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 567 transitions. Word has length 89 [2023-11-24 21:57:59,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:59,376 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 567 transitions. [2023-11-24 21:57:59,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:59,377 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 567 transitions. [2023-11-24 21:57:59,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-24 21:57:59,387 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:59,388 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:59,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:59,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:59,595 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:57:59,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:59,595 INFO L85 PathProgramCache]: Analyzing trace with hash 806358785, now seen corresponding path program 1 times [2023-11-24 21:57:59,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:59,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095128071] [2023-11-24 21:57:59,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:59,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:59,665 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:57:59,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105701314] [2023-11-24 21:57:59,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:59,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:59,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:59,668 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:59,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:58:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:00,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:58:00,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:00,079 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:58:00,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:00,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095128071] [2023-11-24 21:58:00,080 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:58:00,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105701314] [2023-11-24 21:58:00,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105701314] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:00,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:00,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:58:00,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155993071] [2023-11-24 21:58:00,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:00,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:58:00,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:00,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:58:00,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:58:00,084 INFO L87 Difference]: Start difference. First operand 384 states and 567 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:00,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:00,190 INFO L93 Difference]: Finished difference Result 752 states and 1118 transitions. [2023-11-24 21:58:00,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:58:00,191 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2023-11-24 21:58:00,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:00,194 INFO L225 Difference]: With dead ends: 752 [2023-11-24 21:58:00,194 INFO L226 Difference]: Without dead ends: 371 [2023-11-24 21:58:00,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:58:00,197 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 165 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1393 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:00,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1393 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:58:00,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2023-11-24 21:58:00,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 370. [2023-11-24 21:58:00,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 358 states have (on average 1.4804469273743017) internal successors, (530), 364 states have internal predecessors, (530), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 21:58:00,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 546 transitions. [2023-11-24 21:58:00,213 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 546 transitions. Word has length 89 [2023-11-24 21:58:00,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:00,213 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 546 transitions. [2023-11-24 21:58:00,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:00,214 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 546 transitions. [2023-11-24 21:58:00,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-24 21:58:00,215 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:00,215 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:00,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:58:00,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:00,422 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:58:00,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:00,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1779404529, now seen corresponding path program 1 times [2023-11-24 21:58:00,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:00,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745629816] [2023-11-24 21:58:00,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:00,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:00,483 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:58:00,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891460379] [2023-11-24 21:58:00,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:00,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:00,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:00,489 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:00,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:58:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:00,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:58:00,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:01,192 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:58:01,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:01,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745629816] [2023-11-24 21:58:01,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:58:01,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891460379] [2023-11-24 21:58:01,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891460379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:01,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:01,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:58:01,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552492773] [2023-11-24 21:58:01,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:01,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:01,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:01,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:01,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:01,198 INFO L87 Difference]: Start difference. First operand 370 states and 546 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:01,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:01,352 INFO L93 Difference]: Finished difference Result 1011 states and 1511 transitions. [2023-11-24 21:58:01,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:01,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2023-11-24 21:58:01,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:01,363 INFO L225 Difference]: With dead ends: 1011 [2023-11-24 21:58:01,363 INFO L226 Difference]: Without dead ends: 644 [2023-11-24 21:58:01,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:01,365 INFO L413 NwaCegarLoop]: 722 mSDtfsCounter, 354 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 1231 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:01,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 1231 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:58:01,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2023-11-24 21:58:01,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 628. [2023-11-24 21:58:01,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 616 states have (on average 1.5016233766233766) internal successors, (925), 622 states have internal predecessors, (925), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 21:58:01,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 941 transitions. [2023-11-24 21:58:01,403 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 941 transitions. Word has length 89 [2023-11-24 21:58:01,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:01,404 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 941 transitions. [2023-11-24 21:58:01,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:01,404 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 941 transitions. [2023-11-24 21:58:01,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-24 21:58:01,409 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:01,410 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:01,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:58:01,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:01,621 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:58:01,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:01,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1815871715, now seen corresponding path program 1 times [2023-11-24 21:58:01,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:01,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106223146] [2023-11-24 21:58:01,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:01,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:01,682 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:58:01,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226252374] [2023-11-24 21:58:01,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:01,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:01,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:01,684 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:01,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:58:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:02,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:58:02,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:02,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:58:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 21:58:02,118 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:58:02,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:02,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106223146] [2023-11-24 21:58:02,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:58:02,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226252374] [2023-11-24 21:58:02,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226252374] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:02,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:02,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:58:02,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585055131] [2023-11-24 21:58:02,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:02,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:58:02,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:02,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:58:02,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:58:02,121 INFO L87 Difference]: Start difference. First operand 628 states and 941 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:58:02,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:02,259 INFO L93 Difference]: Finished difference Result 900 states and 1339 transitions. [2023-11-24 21:58:02,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:58:02,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 102 [2023-11-24 21:58:02,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:02,266 INFO L225 Difference]: With dead ends: 900 [2023-11-24 21:58:02,266 INFO L226 Difference]: Without dead ends: 881 [2023-11-24 21:58:02,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:58:02,267 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 492 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 1624 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:02,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 1624 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:58:02,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2023-11-24 21:58:02,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 630. [2023-11-24 21:58:02,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 618 states have (on average 1.5) internal successors, (927), 624 states have internal predecessors, (927), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 21:58:02,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 943 transitions. [2023-11-24 21:58:02,294 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 943 transitions. Word has length 102 [2023-11-24 21:58:02,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:02,295 INFO L495 AbstractCegarLoop]: Abstraction has 630 states and 943 transitions. [2023-11-24 21:58:02,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:58:02,295 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 943 transitions. [2023-11-24 21:58:02,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-24 21:58:02,297 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:02,298 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:02,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:58:02,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-24 21:58:02,505 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:58:02,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:02,506 INFO L85 PathProgramCache]: Analyzing trace with hash 255819418, now seen corresponding path program 1 times [2023-11-24 21:58:02,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:02,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632075225] [2023-11-24 21:58:02,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:02,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:02,574 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:58:02,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278064115] [2023-11-24 21:58:02,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:02,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:02,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:02,576 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:02,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:58:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:03,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:58:03,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 21:58:03,035 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:58:03,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:03,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632075225] [2023-11-24 21:58:03,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:58:03,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278064115] [2023-11-24 21:58:03,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278064115] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:03,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:03,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:58:03,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130363390] [2023-11-24 21:58:03,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:03,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:03,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:03,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:03,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:03,038 INFO L87 Difference]: Start difference. First operand 630 states and 943 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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) [2023-11-24 21:58:03,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:03,136 INFO L93 Difference]: Finished difference Result 997 states and 1503 transitions. [2023-11-24 21:58:03,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:03,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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 152 [2023-11-24 21:58:03,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:03,142 INFO L225 Difference]: With dead ends: 997 [2023-11-24 21:58:03,142 INFO L226 Difference]: Without dead ends: 672 [2023-11-24 21:58:03,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:03,144 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 8 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:03,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1018 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:58:03,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2023-11-24 21:58:03,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 670. [2023-11-24 21:58:03,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 658 states have (on average 1.4696048632218845) internal successors, (967), 664 states have internal predecessors, (967), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 21:58:03,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 983 transitions. [2023-11-24 21:58:03,166 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 983 transitions. Word has length 152 [2023-11-24 21:58:03,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:03,167 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 983 transitions. [2023-11-24 21:58:03,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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) [2023-11-24 21:58:03,167 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 983 transitions. [2023-11-24 21:58:03,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-24 21:58:03,170 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:03,170 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:03,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-24 21:58:03,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-24 21:58:03,377 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:58:03,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:03,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1285178716, now seen corresponding path program 1 times [2023-11-24 21:58:03,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:03,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778252842] [2023-11-24 21:58:03,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:03,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:03,445 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:58:03,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [459603632] [2023-11-24 21:58:03,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:03,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:03,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:03,447 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:03,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:58:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:03,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:58:03,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 21:58:03,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:58:03,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:03,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778252842] [2023-11-24 21:58:03,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:58:03,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459603632] [2023-11-24 21:58:03,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459603632] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:03,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:03,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:58:03,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902657333] [2023-11-24 21:58:03,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:03,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:58:03,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:03,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:58:03,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:58:03,964 INFO L87 Difference]: Start difference. First operand 670 states and 983 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 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) [2023-11-24 21:58:04,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:04,077 INFO L93 Difference]: Finished difference Result 1009 states and 1495 transitions. [2023-11-24 21:58:04,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:58:04,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 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 152 [2023-11-24 21:58:04,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:04,083 INFO L225 Difference]: With dead ends: 1009 [2023-11-24 21:58:04,083 INFO L226 Difference]: Without dead ends: 644 [2023-11-24 21:58:04,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:58:04,085 INFO L413 NwaCegarLoop]: 508 mSDtfsCounter, 153 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:04,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1372 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:58:04,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2023-11-24 21:58:04,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 642. [2023-11-24 21:58:04,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 630 states have (on average 1.4682539682539681) internal successors, (925), 636 states have internal predecessors, (925), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 21:58:04,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 941 transitions. [2023-11-24 21:58:04,109 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 941 transitions. Word has length 152 [2023-11-24 21:58:04,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:04,109 INFO L495 AbstractCegarLoop]: Abstraction has 642 states and 941 transitions. [2023-11-24 21:58:04,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 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) [2023-11-24 21:58:04,110 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 941 transitions. [2023-11-24 21:58:04,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-24 21:58:04,112 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:04,113 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:04,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:58:04,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:04,321 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:58:04,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:04,322 INFO L85 PathProgramCache]: Analyzing trace with hash 469125262, now seen corresponding path program 1 times [2023-11-24 21:58:04,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:04,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346578872] [2023-11-24 21:58:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:04,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:04,422 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:58:04,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211094428] [2023-11-24 21:58:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:04,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:04,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:04,424 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:04,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:58:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:04,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:58:04,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 21:58:04,895 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:58:04,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:04,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346578872] [2023-11-24 21:58:04,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:58:04,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211094428] [2023-11-24 21:58:04,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211094428] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:04,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:04,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:58:04,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121532365] [2023-11-24 21:58:04,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:04,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:58:04,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:04,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:58:04,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:58:04,905 INFO L87 Difference]: Start difference. First operand 642 states and 941 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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) [2023-11-24 21:58:04,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:04,992 INFO L93 Difference]: Finished difference Result 889 states and 1287 transitions. [2023-11-24 21:58:04,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:58:04,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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 152 [2023-11-24 21:58:04,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:04,996 INFO L225 Difference]: With dead ends: 889 [2023-11-24 21:58:04,997 INFO L226 Difference]: Without dead ends: 552 [2023-11-24 21:58:04,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:58:04,998 INFO L413 NwaCegarLoop]: 441 mSDtfsCounter, 78 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:04,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1240 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:58:05,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2023-11-24 21:58:05,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2023-11-24 21:58:05,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 540 states have (on average 1.4277777777777778) internal successors, (771), 546 states have internal predecessors, (771), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 21:58:05,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 787 transitions. [2023-11-24 21:58:05,021 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 787 transitions. Word has length 152 [2023-11-24 21:58:05,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:05,022 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 787 transitions. [2023-11-24 21:58:05,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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) [2023-11-24 21:58:05,022 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 787 transitions. [2023-11-24 21:58:05,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-24 21:58:05,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:05,025 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:05,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-24 21:58:05,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:05,233 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:58:05,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:05,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1498484560, now seen corresponding path program 1 times [2023-11-24 21:58:05,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:05,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708079225] [2023-11-24 21:58:05,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:05,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:05,296 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:58:05,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292955558] [2023-11-24 21:58:05,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:05,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:05,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:05,298 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:05,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:58:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:05,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:58:05,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:06,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:58:06,021 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:58:06,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:06,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708079225] [2023-11-24 21:58:06,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:58:06,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292955558] [2023-11-24 21:58:06,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292955558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:06,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:06,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:58:06,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459266770] [2023-11-24 21:58:06,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:06,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:58:06,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:06,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:58:06,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:58:06,031 INFO L87 Difference]: Start difference. First operand 552 states and 787 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 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) [2023-11-24 21:58:06,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:06,459 INFO L93 Difference]: Finished difference Result 1134 states and 1612 transitions. [2023-11-24 21:58:06,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:58:06,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 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 152 [2023-11-24 21:58:06,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:06,465 INFO L225 Difference]: With dead ends: 1134 [2023-11-24 21:58:06,465 INFO L226 Difference]: Without dead ends: 702 [2023-11-24 21:58:06,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:58:06,467 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 899 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:06,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [904 Valid, 1015 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 21:58:06,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2023-11-24 21:58:06,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 674. [2023-11-24 21:58:06,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 662 states have (on average 1.418429003021148) internal successors, (939), 668 states have internal predecessors, (939), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 21:58:06,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 955 transitions. [2023-11-24 21:58:06,518 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 955 transitions. Word has length 152 [2023-11-24 21:58:06,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:06,521 INFO L495 AbstractCegarLoop]: Abstraction has 674 states and 955 transitions. [2023-11-24 21:58:06,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 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) [2023-11-24 21:58:06,522 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 955 transitions. [2023-11-24 21:58:06,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-11-24 21:58:06,525 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:06,525 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:06,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 21:58:06,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:06,734 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:58:06,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:06,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1578844637, now seen corresponding path program 1 times [2023-11-24 21:58:06,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:06,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872627512] [2023-11-24 21:58:06,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:06,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:06,814 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:58:06,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541616433] [2023-11-24 21:58:06,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:06,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:06,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:06,816 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:06,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 21:58:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:07,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 21:58:07,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:07,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:58:07,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 21:58:07,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 21:58:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:58:07,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:58:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:58:07,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:07,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872627512] [2023-11-24 21:58:07,856 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:58:07,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541616433] [2023-11-24 21:58:07,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541616433] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:58:07,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:58:07,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-24 21:58:07,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894592384] [2023-11-24 21:58:07,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:58:07,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:58:07,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:07,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:58:07,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:58:07,859 INFO L87 Difference]: Start difference. First operand 674 states and 955 transitions. Second operand has 9 states, 9 states have (on average 26.88888888888889) internal successors, (242), 9 states have internal predecessors, (242), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-24 21:58:08,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:08,210 INFO L93 Difference]: Finished difference Result 2119 states and 2988 transitions. [2023-11-24 21:58:08,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:58:08,211 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 26.88888888888889) internal successors, (242), 9 states have internal predecessors, (242), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 162 [2023-11-24 21:58:08,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:08,222 INFO L225 Difference]: With dead ends: 2119 [2023-11-24 21:58:08,223 INFO L226 Difference]: Without dead ends: 1747 [2023-11-24 21:58:08,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 312 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:58:08,225 INFO L413 NwaCegarLoop]: 486 mSDtfsCounter, 1844 mSDsluCounter, 2409 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1853 SdHoareTripleChecker+Valid, 2895 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:08,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1853 Valid, 2895 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:58:08,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2023-11-24 21:58:08,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1068. [2023-11-24 21:58:08,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1052 states have (on average 1.4249049429657794) internal successors, (1499), 1058 states have internal predecessors, (1499), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-24 21:58:08,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1521 transitions. [2023-11-24 21:58:08,286 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1521 transitions. Word has length 162 [2023-11-24 21:58:08,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:08,287 INFO L495 AbstractCegarLoop]: Abstraction has 1068 states and 1521 transitions. [2023-11-24 21:58:08,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 26.88888888888889) internal successors, (242), 9 states have internal predecessors, (242), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-24 21:58:08,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1521 transitions. [2023-11-24 21:58:08,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2023-11-24 21:58:08,295 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:08,296 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:08,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 21:58:08,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:08,504 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:58:08,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:08,505 INFO L85 PathProgramCache]: Analyzing trace with hash 305248451, now seen corresponding path program 1 times [2023-11-24 21:58:08,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:08,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119343403] [2023-11-24 21:58:08,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:08,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:08,685 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:58:08,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496885739] [2023-11-24 21:58:08,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:08,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:08,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:08,687 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:08,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 21:58:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:09,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 1864 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-24 21:58:09,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:09,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:58:09,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 21:58:09,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 21:58:10,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 21:58:10,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 21:58:10,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 21:58:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 458 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:58:10,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:58:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 458 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:58:10,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:10,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119343403] [2023-11-24 21:58:10,986 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:58:10,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496885739] [2023-11-24 21:58:10,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496885739] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:58:10,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:58:10,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-24 21:58:10,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153071893] [2023-11-24 21:58:10,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:58:10,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:58:10,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:10,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:58:10,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:58:10,991 INFO L87 Difference]: Start difference. First operand 1068 states and 1521 transitions. Second operand has 15 states, 15 states have (on average 46.53333333333333) internal successors, (698), 15 states have internal predecessors, (698), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-24 21:58:11,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:11,768 INFO L93 Difference]: Finished difference Result 4228 states and 5991 transitions. [2023-11-24 21:58:11,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-24 21:58:11,769 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 46.53333333333333) internal successors, (698), 15 states have internal predecessors, (698), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 390 [2023-11-24 21:58:11,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:11,793 INFO L225 Difference]: With dead ends: 4228 [2023-11-24 21:58:11,793 INFO L226 Difference]: Without dead ends: 3856 [2023-11-24 21:58:11,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 762 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2023-11-24 21:58:11,799 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 6314 mSDsluCounter, 4799 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6344 SdHoareTripleChecker+Valid, 5286 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:11,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6344 Valid, 5286 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:58:11,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3856 states. [2023-11-24 21:58:11,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3856 to 2088. [2023-11-24 21:58:11,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 2066 states have (on average 1.4370764762826718) internal successors, (2969), 2072 states have internal predecessors, (2969), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-24 21:58:11,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3003 transitions. [2023-11-24 21:58:11,982 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3003 transitions. Word has length 390 [2023-11-24 21:58:11,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:11,982 INFO L495 AbstractCegarLoop]: Abstraction has 2088 states and 3003 transitions. [2023-11-24 21:58:11,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 46.53333333333333) internal successors, (698), 15 states have internal predecessors, (698), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-24 21:58:11,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3003 transitions. [2023-11-24 21:58:12,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 847 [2023-11-24 21:58:12,014 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:12,014 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:12,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 21:58:12,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:12,226 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:58:12,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:12,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1737212413, now seen corresponding path program 2 times [2023-11-24 21:58:12,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:12,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259052158] [2023-11-24 21:58:12,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:12,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:12,559 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:58:12,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866434134] [2023-11-24 21:58:12,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:58:12,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:12,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:12,561 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:12,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 21:58:13,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-24 21:58:13,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:58:13,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-24 21:58:13,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:14,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:58:15,379 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:58:15,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 23 [2023-11-24 21:58:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3425 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3425 trivial. 0 not checked. [2023-11-24 21:58:15,577 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:58:15,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:15,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259052158] [2023-11-24 21:58:15,578 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:58:15,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866434134] [2023-11-24 21:58:15,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866434134] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:15,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:15,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-24 21:58:15,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141332508] [2023-11-24 21:58:15,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:15,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:58:15,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:15,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:58:15,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:58:15,582 INFO L87 Difference]: Start difference. First operand 2088 states and 3003 transitions. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 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) [2023-11-24 21:58:16,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:16,314 INFO L93 Difference]: Finished difference Result 2605 states and 3713 transitions. [2023-11-24 21:58:16,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:58:16,315 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 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 846 [2023-11-24 21:58:16,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:16,331 INFO L225 Difference]: With dead ends: 2605 [2023-11-24 21:58:16,331 INFO L226 Difference]: Without dead ends: 2236 [2023-11-24 21:58:16,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 851 GetRequests, 836 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:58:16,334 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 1053 mSDsluCounter, 1749 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1062 SdHoareTripleChecker+Valid, 2229 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:16,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1062 Valid, 2229 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 21:58:16,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2023-11-24 21:58:16,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 2117. [2023-11-24 21:58:16,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2095 states have (on average 1.4310262529832936) internal successors, (2998), 2101 states have internal predecessors, (2998), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-24 21:58:16,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 3032 transitions. [2023-11-24 21:58:16,444 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 3032 transitions. Word has length 846 [2023-11-24 21:58:16,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:16,446 INFO L495 AbstractCegarLoop]: Abstraction has 2117 states and 3032 transitions. [2023-11-24 21:58:16,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 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) [2023-11-24 21:58:16,447 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 3032 transitions. [2023-11-24 21:58:16,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 848 [2023-11-24 21:58:16,458 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:16,458 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:16,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-24 21:58:16,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:16,672 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:58:16,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:16,672 INFO L85 PathProgramCache]: Analyzing trace with hash 490330517, now seen corresponding path program 1 times [2023-11-24 21:58:16,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:16,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400667997] [2023-11-24 21:58:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:16,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:17,147 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:58:17,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318395023] [2023-11-24 21:58:17,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:17,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:17,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:17,149 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:17,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1cca754-8bbd-4562-a33b-690b84e44000/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process