./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/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_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/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_8bc2753f-7447-4640-92b8-edb0d414276b/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 adfc1710e761824cc0d761ee45a1724b8fd34135f47dcc82b27f8b64b97ca013 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:42:52,219 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:42:52,353 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:42:52,362 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:42:52,363 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:42:52,402 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:42:52,404 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:42:52,405 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:42:52,406 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:42:52,412 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:42:52,413 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:42:52,414 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:42:52,415 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:42:52,417 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:42:52,417 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:42:52,418 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:42:52,419 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:42:52,419 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:42:52,420 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:42:52,420 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:42:52,421 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:42:52,422 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:42:52,422 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:42:52,423 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:42:52,423 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:42:52,424 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:42:52,424 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:42:52,425 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:42:52,426 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:42:52,427 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:42:52,428 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:42:52,428 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:42:52,429 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:42:52,429 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:42:52,430 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:42:52,430 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:42:52,430 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:42:52,431 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:42:52,431 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:42:52,431 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:42:52,432 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:42:52,432 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:42:52,433 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_8bc2753f-7447-4640-92b8-edb0d414276b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adfc1710e761824cc0d761ee45a1724b8fd34135f47dcc82b27f8b64b97ca013 [2023-11-24 21:42:52,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:42:52,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:42:52,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:42:52,735 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:42:52,736 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:42:52,737 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-1.i [2023-11-24 21:42:55,894 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:42:56,341 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:42:56,342 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-1.i [2023-11-24 21:42:56,370 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/data/2b7eb2fcd/0c75973d07134eaeb8db287a44ce8f01/FLAG186059928 [2023-11-24 21:42:56,385 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/data/2b7eb2fcd/0c75973d07134eaeb8db287a44ce8f01 [2023-11-24 21:42:56,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:42:56,389 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:42:56,390 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:42:56,390 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:42:56,397 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:42:56,398 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:42:56" (1/1) ... [2023-11-24 21:42:56,399 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17b2fca8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:56, skipping insertion in model container [2023-11-24 21:42:56,400 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:42:56" (1/1) ... [2023-11-24 21:42:56,485 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:42:56,925 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_8bc2753f-7447-4640-92b8-edb0d414276b/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-1.i[33021,33034] [2023-11-24 21:42:57,165 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_8bc2753f-7447-4640-92b8-edb0d414276b/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-1.i[49681,49694] [2023-11-24 21:42:57,175 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:42:57,187 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:42:57,218 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_8bc2753f-7447-4640-92b8-edb0d414276b/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-1.i[33021,33034] [2023-11-24 21:42:57,295 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_8bc2753f-7447-4640-92b8-edb0d414276b/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-1.i[49681,49694] [2023-11-24 21:42:57,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:42:57,342 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:42:57,351 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:42:57,351 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:57 WrapperNode [2023-11-24 21:42:57,352 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:42:57,353 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:42:57,353 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:42:57,354 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:42:57,362 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:57" (1/1) ... [2023-11-24 21:42:57,397 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:57" (1/1) ... [2023-11-24 21:42:57,504 INFO L138 Inliner]: procedures = 177, calls = 388, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1895 [2023-11-24 21:42:57,506 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:42:57,520 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:42:57,521 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:42:57,521 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:42:57,533 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:57" (1/1) ... [2023-11-24 21:42:57,533 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:57" (1/1) ... [2023-11-24 21:42:57,548 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:57" (1/1) ... [2023-11-24 21:42:57,693 INFO L175 MemorySlicer]: Split 359 memory accesses to 5 slices as follows [2, 5, 24, 323, 5]. 90 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 85 writes are split as follows [0, 1, 1, 82, 1]. [2023-11-24 21:42:57,694 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:57" (1/1) ... [2023-11-24 21:42:57,694 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:57" (1/1) ... [2023-11-24 21:42:57,765 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:57" (1/1) ... [2023-11-24 21:42:57,800 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:57" (1/1) ... [2023-11-24 21:42:57,807 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:57" (1/1) ... [2023-11-24 21:42:57,828 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:57" (1/1) ... [2023-11-24 21:42:57,851 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:42:57,855 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:42:57,856 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:42:57,856 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:42:57,857 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:57" (1/1) ... [2023-11-24 21:42:57,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:42:57,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:42:57,911 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:42:57,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:42:57,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:42:57,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:42:57,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:42:57,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:42:57,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 21:42:57,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 21:42:57,968 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 21:42:57,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:42:57,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:42:57,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:42:57,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:42:57,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 21:42:57,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2023-11-24 21:42:57,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2023-11-24 21:42:57,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2023-11-24 21:42:57,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#3 [2023-11-24 21:42:57,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#4 [2023-11-24 21:42:57,971 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2023-11-24 21:42:57,971 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2023-11-24 21:42:57,971 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2023-11-24 21:42:57,971 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#3 [2023-11-24 21:42:57,971 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#4 [2023-11-24 21:42:57,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:42:57,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:42:57,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 21:42:57,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 21:42:57,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 21:42:57,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-24 21:42:57,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-24 21:42:57,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:42:57,975 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-24 21:42:57,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:42:57,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 21:42:57,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 21:42:57,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-24 21:42:57,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-24 21:42:57,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:42:57,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:42:57,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:42:57,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:42:57,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:42:57,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 21:42:57,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:42:57,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:42:58,290 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:42:58,293 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:43:01,380 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:43:01,443 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:43:01,443 INFO L309 CfgBuilder]: Removed 83 assume(true) statements. [2023-11-24 21:43:01,444 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:43:01 BoogieIcfgContainer [2023-11-24 21:43:01,444 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:43:01,447 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:43:01,448 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:43:01,451 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:43:01,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:42:56" (1/3) ... [2023-11-24 21:43:01,453 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f70c285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:43:01, skipping insertion in model container [2023-11-24 21:43:01,453 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:57" (2/3) ... [2023-11-24 21:43:01,454 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f70c285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:43:01, skipping insertion in model container [2023-11-24 21:43:01,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:43:01" (3/3) ... [2023-11-24 21:43:01,455 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test5-1.i [2023-11-24 21:43:01,475 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:43:01,475 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-24 21:43:01,546 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:43:01,554 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;@687617ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:43:01,554 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-24 21:43:01,562 INFO L276 IsEmpty]: Start isEmpty. Operand has 501 states, 485 states have (on average 1.711340206185567) internal successors, (830), 492 states have internal predecessors, (830), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-24 21:43:01,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-24 21:43:01,570 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:01,571 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:01,572 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:01,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:01,577 INFO L85 PathProgramCache]: Analyzing trace with hash 213840836, now seen corresponding path program 1 times [2023-11-24 21:43:01,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:01,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124166803] [2023-11-24 21:43:01,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:01,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:01,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:01,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124166803] [2023-11-24 21:43:01,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-24 21:43:01,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382664275] [2023-11-24 21:43:01,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:01,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:01,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:01,787 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:01,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:43:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:02,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-24 21:43:02,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:02,072 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 21:43:02,072 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:02,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382664275] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:02,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:02,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:02,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595671908] [2023-11-24 21:43:02,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:02,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 21:43:02,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:02,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 21:43:02,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:43:02,117 INFO L87 Difference]: Start difference. First operand has 501 states, 485 states have (on average 1.711340206185567) internal successors, (830), 492 states have internal predecessors, (830), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 21:43:02,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:02,223 INFO L93 Difference]: Finished difference Result 1001 states and 1708 transitions. [2023-11-24 21:43:02,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 21:43:02,226 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2023-11-24 21:43:02,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:02,245 INFO L225 Difference]: With dead ends: 1001 [2023-11-24 21:43:02,246 INFO L226 Difference]: Without dead ends: 499 [2023-11-24 21:43:02,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 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 21:43:02,259 INFO L413 NwaCegarLoop]: 756 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, 756 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 21:43:02,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 756 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:43:02,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2023-11-24 21:43:02,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 499. [2023-11-24 21:43:02,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 484 states have (on average 1.5206611570247934) internal successors, (736), 490 states have internal predecessors, (736), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-24 21:43:02,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 758 transitions. [2023-11-24 21:43:02,348 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 758 transitions. Word has length 7 [2023-11-24 21:43:02,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:02,349 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 758 transitions. [2023-11-24 21:43:02,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 21:43:02,349 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 758 transitions. [2023-11-24 21:43:02,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-24 21:43:02,354 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:02,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:02,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:02,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-24 21:43:02,567 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:02,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:02,567 INFO L85 PathProgramCache]: Analyzing trace with hash 617028687, now seen corresponding path program 1 times [2023-11-24 21:43:02,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:02,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381109549] [2023-11-24 21:43:02,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:02,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:02,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:02,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381109549] [2023-11-24 21:43:02,651 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-24 21:43:02,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115034465] [2023-11-24 21:43:02,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:02,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:02,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:02,655 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:02,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:43:02,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:02,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:43:02,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:02,998 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 21:43:03,000 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:03,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115034465] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:03,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:03,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:03,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728812929] [2023-11-24 21:43:03,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:03,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:03,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:03,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:03,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:03,012 INFO L87 Difference]: Start difference. First operand 499 states and 758 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 21:43:03,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:03,127 INFO L93 Difference]: Finished difference Result 1142 states and 1745 transitions. [2023-11-24 21:43:03,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:03,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 61 [2023-11-24 21:43:03,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:03,136 INFO L225 Difference]: With dead ends: 1142 [2023-11-24 21:43:03,136 INFO L226 Difference]: Without dead ends: 987 [2023-11-24 21:43:03,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 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 21:43:03,139 INFO L413 NwaCegarLoop]: 758 mSDtfsCounter, 723 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1507 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:03,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 1507 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:43:03,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2023-11-24 21:43:03,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 500. [2023-11-24 21:43:03,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 485 states have (on average 1.5195876288659793) internal successors, (737), 491 states have internal predecessors, (737), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-24 21:43:03,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 759 transitions. [2023-11-24 21:43:03,178 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 759 transitions. Word has length 61 [2023-11-24 21:43:03,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:03,179 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 759 transitions. [2023-11-24 21:43:03,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 21:43:03,179 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 759 transitions. [2023-11-24 21:43:03,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-24 21:43:03,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:03,189 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:03,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:03,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:03,396 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:03,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:03,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1061868786, now seen corresponding path program 1 times [2023-11-24 21:43:03,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:03,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687428651] [2023-11-24 21:43:03,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:03,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:03,535 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:43:03,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079191735] [2023-11-24 21:43:03,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:03,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:03,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:03,542 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:03,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:43:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:04,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:43:04,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:04,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:04,197 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:04,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:04,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687428651] [2023-11-24 21:43:04,197 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:43:04,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079191735] [2023-11-24 21:43:04,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079191735] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:04,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:04,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:04,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139558691] [2023-11-24 21:43:04,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:04,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:04,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:04,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:04,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:04,201 INFO L87 Difference]: Start difference. First operand 500 states and 759 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 21:43:04,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:04,311 INFO L93 Difference]: Finished difference Result 1019 states and 1547 transitions. [2023-11-24 21:43:04,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:04,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 207 [2023-11-24 21:43:04,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:04,316 INFO L225 Difference]: With dead ends: 1019 [2023-11-24 21:43:04,317 INFO L226 Difference]: Without dead ends: 521 [2023-11-24 21:43:04,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 205 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 21:43:04,319 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 9 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1456 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 21:43:04,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1456 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:43:04,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2023-11-24 21:43:04,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 520. [2023-11-24 21:43:04,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 505 states have (on average 1.499009900990099) internal successors, (757), 511 states have internal predecessors, (757), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-24 21:43:04,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 779 transitions. [2023-11-24 21:43:04,344 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 779 transitions. Word has length 207 [2023-11-24 21:43:04,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:04,344 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 779 transitions. [2023-11-24 21:43:04,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 21:43:04,345 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 779 transitions. [2023-11-24 21:43:04,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-24 21:43:04,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:04,349 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:04,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:04,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:04,557 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:04,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:04,557 INFO L85 PathProgramCache]: Analyzing trace with hash 574795060, now seen corresponding path program 1 times [2023-11-24 21:43:04,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:04,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349458675] [2023-11-24 21:43:04,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:04,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:04,683 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:43:04,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140871715] [2023-11-24 21:43:04,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:04,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:04,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:04,685 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:04,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:43:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:05,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:43:05,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:05,252 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:05,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:05,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349458675] [2023-11-24 21:43:05,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:43:05,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140871715] [2023-11-24 21:43:05,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140871715] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:05,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:05,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:05,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713572145] [2023-11-24 21:43:05,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:05,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:05,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:05,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:05,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:05,256 INFO L87 Difference]: Start difference. First operand 520 states and 779 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 21:43:05,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:05,357 INFO L93 Difference]: Finished difference Result 1059 states and 1587 transitions. [2023-11-24 21:43:05,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:05,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 207 [2023-11-24 21:43:05,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:05,365 INFO L225 Difference]: With dead ends: 1059 [2023-11-24 21:43:05,365 INFO L226 Difference]: Without dead ends: 541 [2023-11-24 21:43:05,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 205 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 21:43:05,367 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 9 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1456 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 21:43:05,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1456 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:43:05,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2023-11-24 21:43:05,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 540. [2023-11-24 21:43:05,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 525 states have (on average 1.48) internal successors, (777), 531 states have internal predecessors, (777), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-24 21:43:05,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 799 transitions. [2023-11-24 21:43:05,388 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 799 transitions. Word has length 207 [2023-11-24 21:43:05,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:05,389 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 799 transitions. [2023-11-24 21:43:05,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 21:43:05,390 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 799 transitions. [2023-11-24 21:43:05,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-24 21:43:05,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:05,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:05,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:05,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:05,603 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:05,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:05,604 INFO L85 PathProgramCache]: Analyzing trace with hash -2072809294, now seen corresponding path program 1 times [2023-11-24 21:43:05,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:05,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619968396] [2023-11-24 21:43:05,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:05,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:05,700 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:43:05,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025385665] [2023-11-24 21:43:05,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:05,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:05,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:05,702 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:05,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:43:06,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:06,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:43:06,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:43:06,318 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:06,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:06,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619968396] [2023-11-24 21:43:06,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:43:06,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025385665] [2023-11-24 21:43:06,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025385665] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:06,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:06,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:06,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955183697] [2023-11-24 21:43:06,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:06,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:06,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:06,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:06,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:06,322 INFO L87 Difference]: Start difference. First operand 540 states and 799 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 21:43:06,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:06,438 INFO L93 Difference]: Finished difference Result 715 states and 1068 transitions. [2023-11-24 21:43:06,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:06,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 207 [2023-11-24 21:43:06,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:06,444 INFO L225 Difference]: With dead ends: 715 [2023-11-24 21:43:06,444 INFO L226 Difference]: Without dead ends: 561 [2023-11-24 21:43:06,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 205 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 21:43:06,446 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 9 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1456 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 21:43:06,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1456 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:43:06,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2023-11-24 21:43:06,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 560. [2023-11-24 21:43:06,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 545 states have (on average 1.4623853211009175) internal successors, (797), 551 states have internal predecessors, (797), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-24 21:43:06,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 819 transitions. [2023-11-24 21:43:06,467 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 819 transitions. Word has length 207 [2023-11-24 21:43:06,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:06,468 INFO L495 AbstractCegarLoop]: Abstraction has 560 states and 819 transitions. [2023-11-24 21:43:06,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 21:43:06,468 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 819 transitions. [2023-11-24 21:43:06,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-24 21:43:06,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:06,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:06,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:06,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:06,681 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:06,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:06,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1767988042, now seen corresponding path program 1 times [2023-11-24 21:43:06,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:06,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689671564] [2023-11-24 21:43:06,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:06,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:06,774 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:43:06,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643716363] [2023-11-24 21:43:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:06,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:06,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:06,776 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:06,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:43:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:07,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:43:07,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:07,373 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:07,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:07,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689671564] [2023-11-24 21:43:07,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:43:07,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643716363] [2023-11-24 21:43:07,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643716363] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:07,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:07,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:43:07,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705784638] [2023-11-24 21:43:07,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:07,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:43:07,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:07,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:43:07,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:07,377 INFO L87 Difference]: Start difference. First operand 560 states and 819 transitions. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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 21:43:07,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:07,491 INFO L93 Difference]: Finished difference Result 1105 states and 1623 transitions. [2023-11-24 21:43:07,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:07,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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 207 [2023-11-24 21:43:07,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:07,495 INFO L225 Difference]: With dead ends: 1105 [2023-11-24 21:43:07,495 INFO L226 Difference]: Without dead ends: 547 [2023-11-24 21:43:07,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 204 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 21:43:07,497 INFO L413 NwaCegarLoop]: 728 mSDtfsCounter, 165 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 2032 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 21:43:07,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 2032 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:43:07,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2023-11-24 21:43:07,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 546. [2023-11-24 21:43:07,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 531 states have (on average 1.4613935969868173) internal successors, (776), 537 states have internal predecessors, (776), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-24 21:43:07,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 798 transitions. [2023-11-24 21:43:07,518 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 798 transitions. Word has length 207 [2023-11-24 21:43:07,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:07,518 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 798 transitions. [2023-11-24 21:43:07,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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 21:43:07,518 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 798 transitions. [2023-11-24 21:43:07,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-24 21:43:07,522 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:07,522 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:07,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:07,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-24 21:43:07,730 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:07,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:07,731 INFO L85 PathProgramCache]: Analyzing trace with hash 514194152, now seen corresponding path program 1 times [2023-11-24 21:43:07,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:07,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414574293] [2023-11-24 21:43:07,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:07,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:07,840 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:43:07,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503727875] [2023-11-24 21:43:07,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:07,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:07,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:07,847 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:07,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:43:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:08,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:43:08,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:08,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:08,467 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:08,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:08,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414574293] [2023-11-24 21:43:08,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:43:08,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503727875] [2023-11-24 21:43:08,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503727875] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:08,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:08,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:43:08,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795481903] [2023-11-24 21:43:08,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:08,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:43:08,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:08,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:43:08,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:08,471 INFO L87 Difference]: Start difference. First operand 546 states and 798 transitions. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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 21:43:08,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:08,588 INFO L93 Difference]: Finished difference Result 1077 states and 1581 transitions. [2023-11-24 21:43:08,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:08,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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 207 [2023-11-24 21:43:08,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:08,593 INFO L225 Difference]: With dead ends: 1077 [2023-11-24 21:43:08,593 INFO L226 Difference]: Without dead ends: 533 [2023-11-24 21:43:08,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 204 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 21:43:08,595 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 165 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 2011 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 21:43:08,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 2011 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:43:08,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2023-11-24 21:43:08,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 532. [2023-11-24 21:43:08,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 517 states have (on average 1.460348162475822) internal successors, (755), 523 states have internal predecessors, (755), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-24 21:43:08,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 777 transitions. [2023-11-24 21:43:08,615 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 777 transitions. Word has length 207 [2023-11-24 21:43:08,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:08,615 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 777 transitions. [2023-11-24 21:43:08,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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 21:43:08,616 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 777 transitions. [2023-11-24 21:43:08,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-24 21:43:08,619 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:08,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:08,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:08,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-24 21:43:08,839 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:08,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:08,840 INFO L85 PathProgramCache]: Analyzing trace with hash -352270090, now seen corresponding path program 1 times [2023-11-24 21:43:08,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:08,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849217506] [2023-11-24 21:43:08,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:08,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:08,926 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:43:08,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270621642] [2023-11-24 21:43:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:08,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:08,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:08,928 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:08,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:43:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:09,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:43:09,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:43:09,526 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:09,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:09,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849217506] [2023-11-24 21:43:09,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:43:09,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270621642] [2023-11-24 21:43:09,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270621642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:09,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:09,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:43:09,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403897165] [2023-11-24 21:43:09,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:09,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:43:09,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:09,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:43:09,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:09,529 INFO L87 Difference]: Start difference. First operand 532 states and 777 transitions. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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 21:43:09,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:09,637 INFO L93 Difference]: Finished difference Result 693 states and 1022 transitions. [2023-11-24 21:43:09,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:09,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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 207 [2023-11-24 21:43:09,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:09,642 INFO L225 Difference]: With dead ends: 693 [2023-11-24 21:43:09,642 INFO L226 Difference]: Without dead ends: 519 [2023-11-24 21:43:09,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 204 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 21:43:09,644 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 165 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1990 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 21:43:09,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1990 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:43:09,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2023-11-24 21:43:09,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 518. [2023-11-24 21:43:09,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 503 states have (on average 1.459244532803181) internal successors, (734), 509 states have internal predecessors, (734), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-24 21:43:09,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 756 transitions. [2023-11-24 21:43:09,663 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 756 transitions. Word has length 207 [2023-11-24 21:43:09,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:09,663 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 756 transitions. [2023-11-24 21:43:09,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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 21:43:09,664 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 756 transitions. [2023-11-24 21:43:09,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-24 21:43:09,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:09,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:09,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:09,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-24 21:43:09,876 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:09,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:09,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1399375784, now seen corresponding path program 1 times [2023-11-24 21:43:09,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:09,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592526562] [2023-11-24 21:43:09,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:09,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:09,975 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:43:09,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39759096] [2023-11-24 21:43:09,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:09,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:09,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:09,977 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:10,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 21:43:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:10,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:43:10,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:10,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:11,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:11,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:11,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592526562] [2023-11-24 21:43:11,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:43:11,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39759096] [2023-11-24 21:43:11,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39759096] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:11,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:43:11,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-24 21:43:11,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770242951] [2023-11-24 21:43:11,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:11,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:43:11,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:11,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:43:11,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:11,186 INFO L87 Difference]: Start difference. First operand 518 states and 756 transitions. Second operand has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 5 states have internal predecessors, (355), 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 21:43:11,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:11,435 INFO L93 Difference]: Finished difference Result 2043 states and 2997 transitions. [2023-11-24 21:43:11,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:43:11,436 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 5 states have internal predecessors, (355), 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 207 [2023-11-24 21:43:11,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:11,448 INFO L225 Difference]: With dead ends: 2043 [2023-11-24 21:43:11,449 INFO L226 Difference]: Without dead ends: 1882 [2023-11-24 21:43:11,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:11,452 INFO L413 NwaCegarLoop]: 895 mSDtfsCounter, 3593 mSDsluCounter, 2239 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3632 SdHoareTripleChecker+Valid, 3134 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:11,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3632 Valid, 3134 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:43:11,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2023-11-24 21:43:11,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1574. [2023-11-24 21:43:11,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1541 states have (on average 1.4497079818299805) internal successors, (2234), 1547 states have internal predecessors, (2234), 29 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 25 states have call predecessors, (29), 29 states have call successors, (29) [2023-11-24 21:43:11,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 2292 transitions. [2023-11-24 21:43:11,514 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 2292 transitions. Word has length 207 [2023-11-24 21:43:11,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:11,515 INFO L495 AbstractCegarLoop]: Abstraction has 1574 states and 2292 transitions. [2023-11-24 21:43:11,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 5 states have internal predecessors, (355), 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 21:43:11,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 2292 transitions. [2023-11-24 21:43:11,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2023-11-24 21:43:11,535 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:11,535 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:11,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:11,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:11,745 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:11,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:11,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1239630097, now seen corresponding path program 2 times [2023-11-24 21:43:11,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:11,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499866926] [2023-11-24 21:43:11,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:11,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:12,004 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:43:12,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018760380] [2023-11-24 21:43:12,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:43:12,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:12,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:12,006 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:12,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 21:43:12,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-24 21:43:12,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:43:12,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-24 21:43:12,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:13,102 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2023-11-24 21:43:13,103 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:13,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:13,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499866926] [2023-11-24 21:43:13,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:43:13,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018760380] [2023-11-24 21:43:13,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018760380] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:13,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:13,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:43:13,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790301559] [2023-11-24 21:43:13,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:13,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:43:13,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:13,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:43:13,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:13,107 INFO L87 Difference]: Start difference. First operand 1574 states and 2292 transitions. Second operand has 6 states, 6 states have (on average 34.5) internal successors, (207), 6 states have internal predecessors, (207), 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 21:43:13,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:13,704 INFO L93 Difference]: Finished difference Result 1774 states and 2580 transitions. [2023-11-24 21:43:13,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:43:13,705 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 34.5) internal successors, (207), 6 states have internal predecessors, (207), 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 645 [2023-11-24 21:43:13,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:13,717 INFO L225 Difference]: With dead ends: 1774 [2023-11-24 21:43:13,717 INFO L226 Difference]: Without dead ends: 1614 [2023-11-24 21:43:13,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 640 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:13,719 INFO L413 NwaCegarLoop]: 723 mSDtfsCounter, 12 mSDsluCounter, 2469 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3192 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:13,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3192 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 21:43:13,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2023-11-24 21:43:13,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1611. [2023-11-24 21:43:13,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1578 states have (on average 1.443599493029151) internal successors, (2278), 1584 states have internal predecessors, (2278), 29 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 25 states have call predecessors, (29), 29 states have call successors, (29) [2023-11-24 21:43:13,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2336 transitions. [2023-11-24 21:43:13,791 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2336 transitions. Word has length 645 [2023-11-24 21:43:13,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:13,792 INFO L495 AbstractCegarLoop]: Abstraction has 1611 states and 2336 transitions. [2023-11-24 21:43:13,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.5) internal successors, (207), 6 states have internal predecessors, (207), 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 21:43:13,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2336 transitions. [2023-11-24 21:43:13,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2023-11-24 21:43:13,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:13,818 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:13,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:14,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:14,026 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:14,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:14,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1469536146, now seen corresponding path program 1 times [2023-11-24 21:43:14,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:14,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721244447] [2023-11-24 21:43:14,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:14,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:14,277 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:43:14,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835965519] [2023-11-24 21:43:14,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:14,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:14,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:14,279 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:14,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 21:43:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:15,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 2902 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:43:15,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 0 proven. 880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:16,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 0 proven. 880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:17,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:17,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721244447] [2023-11-24 21:43:17,662 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:43:17,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835965519] [2023-11-24 21:43:17,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835965519] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:17,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:43:17,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-24 21:43:17,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343151118] [2023-11-24 21:43:17,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:17,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 21:43:17,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:17,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 21:43:17,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:43:17,670 INFO L87 Difference]: Start difference. First operand 1611 states and 2336 transitions. Second operand has 12 states, 12 states have (on average 102.66666666666667) internal successors, (1232), 11 states have internal predecessors, (1232), 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 21:43:18,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:18,485 INFO L93 Difference]: Finished difference Result 4876 states and 7076 transitions. [2023-11-24 21:43:18,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:43:18,486 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 102.66666666666667) internal successors, (1232), 11 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 646 [2023-11-24 21:43:18,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:18,523 INFO L225 Difference]: With dead ends: 4876 [2023-11-24 21:43:18,523 INFO L226 Difference]: Without dead ends: 4678 [2023-11-24 21:43:18,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1290 GetRequests, 1280 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:43:18,526 INFO L413 NwaCegarLoop]: 867 mSDtfsCounter, 11446 mSDsluCounter, 6309 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11536 SdHoareTripleChecker+Valid, 7176 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:18,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11536 Valid, 7176 Invalid, 264 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [79 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:43:18,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2023-11-24 21:43:18,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 3723. [2023-11-24 21:43:18,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3723 states, 3654 states have (on average 1.4444444444444444) internal successors, (5278), 3660 states have internal predecessors, (5278), 65 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (65), 61 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-24 21:43:18,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 5408 transitions. [2023-11-24 21:43:18,668 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 5408 transitions. Word has length 646 [2023-11-24 21:43:18,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:18,669 INFO L495 AbstractCegarLoop]: Abstraction has 3723 states and 5408 transitions. [2023-11-24 21:43:18,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 102.66666666666667) internal successors, (1232), 11 states have internal predecessors, (1232), 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 21:43:18,670 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 5408 transitions. [2023-11-24 21:43:18,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1523 [2023-11-24 21:43:18,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:18,730 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:18,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:18,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:18,950 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:18,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:18,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1855839716, now seen corresponding path program 2 times [2023-11-24 21:43:18,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:18,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412905459] [2023-11-24 21:43:18,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:18,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:19,705 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:43:19,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771082903] [2023-11-24 21:43:19,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:43:19,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:19,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:19,709 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:19,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-24 21:43:21,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-24 21:43:21,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:43:21,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-24 21:43:21,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6580 trivial. 0 not checked. [2023-11-24 21:43:21,529 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:21,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:21,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412905459] [2023-11-24 21:43:21,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:43:21,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771082903] [2023-11-24 21:43:21,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771082903] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:21,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:21,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:43:21,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528161308] [2023-11-24 21:43:21,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:21,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:43:21,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:21,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:43:21,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:43:21,534 INFO L87 Difference]: Start difference. First operand 3723 states and 5408 transitions. Second operand has 7 states, 7 states have (on average 29.714285714285715) internal successors, (208), 7 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:22,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:22,244 INFO L93 Difference]: Finished difference Result 3931 states and 5707 transitions. [2023-11-24 21:43:22,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:43:22,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 29.714285714285715) internal successors, (208), 7 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1522 [2023-11-24 21:43:22,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:22,270 INFO L225 Difference]: With dead ends: 3931 [2023-11-24 21:43:22,270 INFO L226 Difference]: Without dead ends: 3734 [2023-11-24 21:43:22,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1522 GetRequests, 1516 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:43:22,273 INFO L413 NwaCegarLoop]: 716 mSDtfsCounter, 17 mSDsluCounter, 3043 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3759 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:22,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 3759 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:43:22,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3734 states. [2023-11-24 21:43:22,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3734 to 3731. [2023-11-24 21:43:22,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3731 states, 3662 states have (on average 1.4445658110322228) internal successors, (5290), 3668 states have internal predecessors, (5290), 65 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (65), 61 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-24 21:43:22,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5420 transitions. [2023-11-24 21:43:22,435 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5420 transitions. Word has length 1522 [2023-11-24 21:43:22,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:22,438 INFO L495 AbstractCegarLoop]: Abstraction has 3731 states and 5420 transitions. [2023-11-24 21:43:22,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 29.714285714285715) internal successors, (208), 7 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:22,439 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5420 transitions. [2023-11-24 21:43:22,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1524 [2023-11-24 21:43:22,467 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:22,468 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:22,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:22,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-24 21:43:22,676 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:22,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:22,678 INFO L85 PathProgramCache]: Analyzing trace with hash 288199022, now seen corresponding path program 1 times [2023-11-24 21:43:22,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:22,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593981975] [2023-11-24 21:43:22,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:22,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:23,323 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:43:23,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006416888] [2023-11-24 21:43:23,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:23,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:23,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:23,333 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:23,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-24 21:43:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:26,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 6959 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:43:26,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 1135 proven. 0 refuted. 0 times theorem prover too weak. 5445 trivial. 0 not checked. [2023-11-24 21:43:27,037 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:27,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:27,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593981975] [2023-11-24 21:43:27,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:43:27,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006416888] [2023-11-24 21:43:27,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006416888] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:27,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:27,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:27,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283009150] [2023-11-24 21:43:27,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:27,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:27,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:27,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:27,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:27,043 INFO L87 Difference]: Start difference. First operand 3731 states and 5420 transitions. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 2 states have internal predecessors, (335), 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 21:43:27,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:27,228 INFO L93 Difference]: Finished difference Result 7337 states and 10654 transitions. [2023-11-24 21:43:27,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:27,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 2 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1523 [2023-11-24 21:43:27,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:27,252 INFO L225 Difference]: With dead ends: 7337 [2023-11-24 21:43:27,252 INFO L226 Difference]: Without dead ends: 3908 [2023-11-24 21:43:27,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1522 GetRequests, 1521 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 21:43:27,259 INFO L413 NwaCegarLoop]: 903 mSDtfsCounter, 480 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 1616 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:27,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 1616 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:43:27,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3908 states. [2023-11-24 21:43:27,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3908 to 3906. [2023-11-24 21:43:27,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3906 states, 3832 states have (on average 1.4444154488517744) internal successors, (5535), 3843 states have internal predecessors, (5535), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 62 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-24 21:43:27,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3906 states to 3906 states and 5675 transitions. [2023-11-24 21:43:27,384 INFO L78 Accepts]: Start accepts. Automaton has 3906 states and 5675 transitions. Word has length 1523 [2023-11-24 21:43:27,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:27,385 INFO L495 AbstractCegarLoop]: Abstraction has 3906 states and 5675 transitions. [2023-11-24 21:43:27,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 2 states have internal predecessors, (335), 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 21:43:27,386 INFO L276 IsEmpty]: Start isEmpty. Operand 3906 states and 5675 transitions. [2023-11-24 21:43:27,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1537 [2023-11-24 21:43:27,433 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:27,434 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:43:27,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:27,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:27,657 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:27,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:27,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1632768597, now seen corresponding path program 1 times [2023-11-24 21:43:27,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:27,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199123922] [2023-11-24 21:43:27,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:27,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:28,292 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:43:28,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921527004] [2023-11-24 21:43:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:28,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:28,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:28,297 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:28,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-24 21:43:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:31,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 7106 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:43:31,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:32,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6565 backedges. 496 proven. 0 refuted. 0 times theorem prover too weak. 6069 trivial. 0 not checked. [2023-11-24 21:43:32,073 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:32,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:32,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199123922] [2023-11-24 21:43:32,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:43:32,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921527004] [2023-11-24 21:43:32,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921527004] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:32,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:32,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:32,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707567085] [2023-11-24 21:43:32,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:32,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:32,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:32,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:32,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:32,079 INFO L87 Difference]: Start difference. First operand 3906 states and 5675 transitions. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 2 states have internal predecessors, (274), 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 21:43:32,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:32,222 INFO L93 Difference]: Finished difference Result 7682 states and 11158 transitions. [2023-11-24 21:43:32,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:32,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 2 states have internal predecessors, (274), 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 1536 [2023-11-24 21:43:32,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:32,244 INFO L225 Difference]: With dead ends: 7682 [2023-11-24 21:43:32,245 INFO L226 Difference]: Without dead ends: 3904 [2023-11-24 21:43:32,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1535 GetRequests, 1534 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 21:43:32,252 INFO L413 NwaCegarLoop]: 733 mSDtfsCounter, 123 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:32,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 1452 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:43:32,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3904 states. [2023-11-24 21:43:32,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3904 to 3904. [2023-11-24 21:43:32,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3904 states, 3830 states have (on average 1.4443864229765013) internal successors, (5532), 3841 states have internal predecessors, (5532), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 62 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-24 21:43:32,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3904 states to 3904 states and 5672 transitions. [2023-11-24 21:43:32,364 INFO L78 Accepts]: Start accepts. Automaton has 3904 states and 5672 transitions. Word has length 1536 [2023-11-24 21:43:32,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:32,365 INFO L495 AbstractCegarLoop]: Abstraction has 3904 states and 5672 transitions. [2023-11-24 21:43:32,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 2 states have internal predecessors, (274), 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 21:43:32,365 INFO L276 IsEmpty]: Start isEmpty. Operand 3904 states and 5672 transitions. [2023-11-24 21:43:32,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1550 [2023-11-24 21:43:32,482 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:32,483 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:43:32,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:32,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:32,696 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:32,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:32,697 INFO L85 PathProgramCache]: Analyzing trace with hash 703093524, now seen corresponding path program 1 times [2023-11-24 21:43:32,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:32,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924022010] [2023-11-24 21:43:32,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:32,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:33,287 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:43:33,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311362309] [2023-11-24 21:43:33,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:33,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:33,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:33,299 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:33,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-24 21:43:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:36,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 7253 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:43:36,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 2164 proven. 0 refuted. 0 times theorem prover too weak. 4398 trivial. 0 not checked. [2023-11-24 21:43:41,965 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:41,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:41,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924022010] [2023-11-24 21:43:41,966 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:43:41,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311362309] [2023-11-24 21:43:41,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311362309] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:41,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:41,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:41,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795507681] [2023-11-24 21:43:41,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:41,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:41,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:41,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:41,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:41,973 INFO L87 Difference]: Start difference. First operand 3904 states and 5672 transitions. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-24 21:43:42,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:42,201 INFO L93 Difference]: Finished difference Result 9755 states and 14186 transitions. [2023-11-24 21:43:42,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:42,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 1549 [2023-11-24 21:43:42,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:42,230 INFO L225 Difference]: With dead ends: 9755 [2023-11-24 21:43:42,230 INFO L226 Difference]: Without dead ends: 6846 [2023-11-24 21:43:42,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1548 GetRequests, 1547 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 21:43:42,238 INFO L413 NwaCegarLoop]: 1170 mSDtfsCounter, 495 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 1870 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:42,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 1870 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:43:42,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6846 states. [2023-11-24 21:43:42,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6846 to 6844. [2023-11-24 21:43:42,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6844 states, 6737 states have (on average 1.4473801395279797) internal successors, (9751), 6748 states have internal predecessors, (9751), 103 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (103), 95 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-24 21:43:42,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6844 states to 6844 states and 9957 transitions. [2023-11-24 21:43:42,454 INFO L78 Accepts]: Start accepts. Automaton has 6844 states and 9957 transitions. Word has length 1549 [2023-11-24 21:43:42,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:42,457 INFO L495 AbstractCegarLoop]: Abstraction has 6844 states and 9957 transitions. [2023-11-24 21:43:42,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-24 21:43:42,458 INFO L276 IsEmpty]: Start isEmpty. Operand 6844 states and 9957 transitions. [2023-11-24 21:43:42,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1560 [2023-11-24 21:43:42,494 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:42,495 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:43:42,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:42,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:42,708 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:42,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:42,709 INFO L85 PathProgramCache]: Analyzing trace with hash 95381031, now seen corresponding path program 1 times [2023-11-24 21:43:42,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:42,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142949663] [2023-11-24 21:43:42,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:42,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:43,335 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:43:43,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935683697] [2023-11-24 21:43:43,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:43,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:43,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:43,338 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:43,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc2753f-7447-4640-92b8-edb0d414276b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process