./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.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_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/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_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/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_aca8721e-5217-41db-90bd-d16569bf147a/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 9885703216edf9cfe4bfb438db591a48e102e73a3e0423f90ce871c05fdf2b57 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:05:07,565 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:05:07,692 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 22:05:07,703 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:05:07,705 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:05:07,748 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:05:07,749 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:05:07,751 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:05:07,753 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:05:07,759 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:05:07,760 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:05:07,760 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:05:07,761 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:05:07,764 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:05:07,764 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:05:07,765 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:05:07,766 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 22:05:07,766 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:05:07,767 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:05:07,768 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:05:07,768 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:05:07,769 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 22:05:07,770 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:05:07,770 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 22:05:07,771 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:05:07,771 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 22:05:07,772 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:05:07,773 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:05:07,774 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:05:07,774 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:05:07,776 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:05:07,776 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:05:07,777 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:05:07,777 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:05:07,778 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 22:05:07,778 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:05:07,778 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:05:07,779 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:05:07,779 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:05:07,779 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 22:05:07,780 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:05:07,780 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:05:07,781 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_aca8721e-5217-41db-90bd-d16569bf147a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9885703216edf9cfe4bfb438db591a48e102e73a3e0423f90ce871c05fdf2b57 [2023-11-24 22:05:08,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:05:08,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:05:08,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:05:08,154 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:05:08,155 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:05:08,157 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i [2023-11-24 22:05:11,805 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:05:12,335 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:05:12,336 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i [2023-11-24 22:05:12,373 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/data/d5d14280a/fa44b6dc63534eb19fbd58522b58818b/FLAG049aa3f91 [2023-11-24 22:05:12,397 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/data/d5d14280a/fa44b6dc63534eb19fbd58522b58818b [2023-11-24 22:05:12,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:05:12,406 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:05:12,410 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:05:12,410 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:05:12,417 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:05:12,418 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:05:12" (1/1) ... [2023-11-24 22:05:12,419 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@387011b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:12, skipping insertion in model container [2023-11-24 22:05:12,419 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:05:12" (1/1) ... [2023-11-24 22:05:12,525 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:05:13,157 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_aca8721e-5217-41db-90bd-d16569bf147a/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i[33022,33035] [2023-11-24 22:05:13,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:05:13,566 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:05:13,619 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_aca8721e-5217-41db-90bd-d16569bf147a/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i[33022,33035] [2023-11-24 22:05:13,869 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:05:13,932 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:05:13,941 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:05:13,943 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:13 WrapperNode [2023-11-24 22:05:13,943 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:05:13,945 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:05:13,946 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:05:13,946 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:05:13,957 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:13" (1/1) ... [2023-11-24 22:05:14,025 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:13" (1/1) ... [2023-11-24 22:05:14,151 INFO L138 Inliner]: procedures = 177, calls = 524, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 3130 [2023-11-24 22:05:14,152 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:05:14,153 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:05:14,153 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:05:14,153 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:05:14,172 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:13" (1/1) ... [2023-11-24 22:05:14,172 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:13" (1/1) ... [2023-11-24 22:05:14,192 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:13" (1/1) ... [2023-11-24 22:05:14,428 INFO L175 MemorySlicer]: Split 490 memory accesses to 5 slices as follows [2, 106, 5, 5, 372]. 76 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 88 writes are split as follows [0, 4, 1, 1, 82]. [2023-11-24 22:05:14,428 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:13" (1/1) ... [2023-11-24 22:05:14,429 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:13" (1/1) ... [2023-11-24 22:05:14,587 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:13" (1/1) ... [2023-11-24 22:05:14,637 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:13" (1/1) ... [2023-11-24 22:05:14,650 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:13" (1/1) ... [2023-11-24 22:05:14,680 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:13" (1/1) ... [2023-11-24 22:05:14,721 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:05:14,723 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:05:14,723 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:05:14,723 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:05:14,724 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:13" (1/1) ... [2023-11-24 22:05:14,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:05:14,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:14,773 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:05:14,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:05:14,828 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2023-11-24 22:05:14,828 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2023-11-24 22:05:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 22:05:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 22:05:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 22:05:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 22:05:14,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 22:05:14,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 22:05:14,832 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 22:05:14,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 22:05:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 22:05:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 22:05:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 22:05:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 22:05:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2023-11-24 22:05:14,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2023-11-24 22:05:14,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2023-11-24 22:05:14,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#3 [2023-11-24 22:05:14,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#4 [2023-11-24 22:05:14,835 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2023-11-24 22:05:14,835 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2023-11-24 22:05:14,835 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2023-11-24 22:05:14,836 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#3 [2023-11-24 22:05:14,836 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#4 [2023-11-24 22:05:14,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 22:05:14,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:05:14,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 22:05:14,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 22:05:14,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 22:05:14,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-24 22:05:14,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-24 22:05:14,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 22:05:14,839 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-24 22:05:14,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 22:05:14,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 22:05:14,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 22:05:14,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-24 22:05:14,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-24 22:05:14,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 22:05:14,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:05:14,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 22:05:14,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 22:05:14,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 22:05:14,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 22:05:14,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:05:14,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:05:15,270 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:05:15,278 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:05:18,827 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:05:18,941 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:05:18,942 INFO L309 CfgBuilder]: Removed 151 assume(true) statements. [2023-11-24 22:05:18,944 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:05:18 BoogieIcfgContainer [2023-11-24 22:05:18,944 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:05:18,948 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:05:18,948 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:05:18,952 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:05:18,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:05:12" (1/3) ... [2023-11-24 22:05:18,954 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e58ad68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:05:18, skipping insertion in model container [2023-11-24 22:05:18,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:13" (2/3) ... [2023-11-24 22:05:18,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e58ad68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:05:18, skipping insertion in model container [2023-11-24 22:05:18,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:05:18" (3/3) ... [2023-11-24 22:05:18,958 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_BER_test10-1.i [2023-11-24 22:05:18,984 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:05:18,985 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 22:05:19,103 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:05:19,111 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;@58638d11, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:05:19,112 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 22:05:19,126 INFO L276 IsEmpty]: Start isEmpty. Operand has 905 states, 886 states have (on average 1.716704288939052) internal successors, (1521), 891 states have internal predecessors, (1521), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-24 22:05:19,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 22:05:19,138 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:19,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:19,139 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:19,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:19,148 INFO L85 PathProgramCache]: Analyzing trace with hash 706441512, now seen corresponding path program 1 times [2023-11-24 22:05:19,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:19,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134096235] [2023-11-24 22:05:19,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:19,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:19,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:19,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134096235] [2023-11-24 22:05:19,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134096235] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:19,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:19,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:05:19,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382566311] [2023-11-24 22:05:19,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:19,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 22:05:19,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:19,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 22:05:19,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 22:05:19,499 INFO L87 Difference]: Start difference. First operand has 905 states, 886 states have (on average 1.716704288939052) internal successors, (1521), 891 states have internal predecessors, (1521), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:19,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:19,686 INFO L93 Difference]: Finished difference Result 1809 states and 3105 transitions. [2023-11-24 22:05:19,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 22:05:19,689 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-24 22:05:19,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:19,716 INFO L225 Difference]: With dead ends: 1809 [2023-11-24 22:05:19,716 INFO L226 Difference]: Without dead ends: 903 [2023-11-24 22:05:19,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 22:05:19,731 INFO L413 NwaCegarLoop]: 1386 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, 1386 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 22:05:19,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1386 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 22:05:19,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2023-11-24 22:05:19,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 903. [2023-11-24 22:05:19,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 885 states have (on average 1.5378531073446329) internal successors, (1361), 890 states have internal predecessors, (1361), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-24 22:05:19,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1388 transitions. [2023-11-24 22:05:19,855 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1388 transitions. Word has length 12 [2023-11-24 22:05:19,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:19,856 INFO L495 AbstractCegarLoop]: Abstraction has 903 states and 1388 transitions. [2023-11-24 22:05:19,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:19,857 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1388 transitions. [2023-11-24 22:05:19,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-24 22:05:19,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:19,864 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:19,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:05:19,865 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:19,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:19,866 INFO L85 PathProgramCache]: Analyzing trace with hash 49589444, now seen corresponding path program 1 times [2023-11-24 22:05:19,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:19,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605988574] [2023-11-24 22:05:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:19,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:20,458 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 22:05:20,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:20,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605988574] [2023-11-24 22:05:20,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605988574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:20,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:20,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:05:20,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151465738] [2023-11-24 22:05:20,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:20,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:05:20,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:20,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:05:20,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:05:20,463 INFO L87 Difference]: Start difference. First operand 903 states and 1388 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:20,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:20,713 INFO L93 Difference]: Finished difference Result 1802 states and 2772 transitions. [2023-11-24 22:05:20,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:05:20,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-24 22:05:20,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:20,726 INFO L225 Difference]: With dead ends: 1802 [2023-11-24 22:05:20,727 INFO L226 Difference]: Without dead ends: 1245 [2023-11-24 22:05:20,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:05:20,731 INFO L413 NwaCegarLoop]: 1461 mSDtfsCounter, 504 mSDsluCounter, 2778 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 4239 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 22:05:20,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 4239 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 22:05:20,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2023-11-24 22:05:20,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 905. [2023-11-24 22:05:20,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 887 states have (on average 1.536640360766629) internal successors, (1363), 892 states have internal predecessors, (1363), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-24 22:05:20,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1390 transitions. [2023-11-24 22:05:20,805 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1390 transitions. Word has length 67 [2023-11-24 22:05:20,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:20,807 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1390 transitions. [2023-11-24 22:05:20,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:20,808 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1390 transitions. [2023-11-24 22:05:20,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-24 22:05:20,825 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:20,825 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:20,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 22:05:20,826 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:20,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:20,828 INFO L85 PathProgramCache]: Analyzing trace with hash -917758722, now seen corresponding path program 1 times [2023-11-24 22:05:20,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:20,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404976551] [2023-11-24 22:05:20,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:20,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:20,938 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:05:20,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081801743] [2023-11-24 22:05:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:20,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:20,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:20,944 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:05:20,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 22:05:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:21,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:05:21,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:21,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:21,614 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:05:21,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:21,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404976551] [2023-11-24 22:05:21,615 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:05:21,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081801743] [2023-11-24 22:05:21,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081801743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:21,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:21,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:05:21,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391440470] [2023-11-24 22:05:21,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:21,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:21,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:21,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:21,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:05:21,618 INFO L87 Difference]: Start difference. First operand 905 states and 1390 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:21,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:21,773 INFO L93 Difference]: Finished difference Result 1828 states and 2808 transitions. [2023-11-24 22:05:21,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:21,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2023-11-24 22:05:21,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:21,780 INFO L225 Difference]: With dead ends: 1828 [2023-11-24 22:05:21,781 INFO L226 Difference]: Without dead ends: 926 [2023-11-24 22:05:21,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 142 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 22:05:21,784 INFO L413 NwaCegarLoop]: 1365 mSDtfsCounter, 9 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2716 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 22:05:21,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 2716 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:05:21,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2023-11-24 22:05:21,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 925. [2023-11-24 22:05:21,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 907 states have (on average 1.5248070562293274) internal successors, (1383), 912 states have internal predecessors, (1383), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-24 22:05:21,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1410 transitions. [2023-11-24 22:05:21,820 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1410 transitions. Word has length 144 [2023-11-24 22:05:21,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:21,820 INFO L495 AbstractCegarLoop]: Abstraction has 925 states and 1410 transitions. [2023-11-24 22:05:21,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:21,821 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1410 transitions. [2023-11-24 22:05:21,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-24 22:05:21,828 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:21,829 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:21,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 22:05:22,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:22,038 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:22,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:22,038 INFO L85 PathProgramCache]: Analyzing trace with hash 2084569210, now seen corresponding path program 1 times [2023-11-24 22:05:22,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:22,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622660631] [2023-11-24 22:05:22,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:22,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:22,116 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:05:22,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1980705601] [2023-11-24 22:05:22,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:22,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:22,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:22,122 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:05:22,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 22:05:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:22,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:05:22,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 22:05:22,613 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:05:22,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:22,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622660631] [2023-11-24 22:05:22,614 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:05:22,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980705601] [2023-11-24 22:05:22,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980705601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:22,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:22,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:05:22,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935978461] [2023-11-24 22:05:22,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:22,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:22,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:22,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:22,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:05:22,618 INFO L87 Difference]: Start difference. First operand 925 states and 1410 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:22,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:22,762 INFO L93 Difference]: Finished difference Result 1455 states and 2229 transitions. [2023-11-24 22:05:22,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:22,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2023-11-24 22:05:22,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:22,772 INFO L225 Difference]: With dead ends: 1455 [2023-11-24 22:05:22,772 INFO L226 Difference]: Without dead ends: 946 [2023-11-24 22:05:22,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 142 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 22:05:22,775 INFO L413 NwaCegarLoop]: 1365 mSDtfsCounter, 9 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2716 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 22:05:22,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 2716 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:05:22,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2023-11-24 22:05:22,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 945. [2023-11-24 22:05:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 927 states have (on average 1.5134843581445523) internal successors, (1403), 932 states have internal predecessors, (1403), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-24 22:05:22,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1430 transitions. [2023-11-24 22:05:22,822 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1430 transitions. Word has length 144 [2023-11-24 22:05:22,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:22,824 INFO L495 AbstractCegarLoop]: Abstraction has 945 states and 1430 transitions. [2023-11-24 22:05:22,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:22,824 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1430 transitions. [2023-11-24 22:05:22,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-24 22:05:22,829 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:22,829 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:22,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 22:05:23,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:23,037 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:23,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:23,037 INFO L85 PathProgramCache]: Analyzing trace with hash 145407164, now seen corresponding path program 1 times [2023-11-24 22:05:23,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:23,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776100403] [2023-11-24 22:05:23,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:23,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:23,114 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:05:23,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803540489] [2023-11-24 22:05:23,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:23,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:23,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:23,119 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:05:23,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 22:05:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:23,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:05:23,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:23,670 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:05:23,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:23,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776100403] [2023-11-24 22:05:23,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:05:23,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803540489] [2023-11-24 22:05:23,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803540489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:23,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:23,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:05:23,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835339975] [2023-11-24 22:05:23,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:23,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:05:23,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:23,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:05:23,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:05:23,675 INFO L87 Difference]: Start difference. First operand 945 states and 1430 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:23,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:23,854 INFO L93 Difference]: Finished difference Result 1874 states and 2844 transitions. [2023-11-24 22:05:23,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:05:23,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2023-11-24 22:05:23,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:23,862 INFO L225 Difference]: With dead ends: 1874 [2023-11-24 22:05:23,862 INFO L226 Difference]: Without dead ends: 932 [2023-11-24 22:05:23,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 141 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 22:05:23,865 INFO L413 NwaCegarLoop]: 1358 mSDtfsCounter, 165 mSDsluCounter, 2564 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 3922 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 22:05:23,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 3922 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:05:23,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2023-11-24 22:05:23,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 931. [2023-11-24 22:05:23,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 913 states have (on average 1.5136911281489596) internal successors, (1382), 918 states have internal predecessors, (1382), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-24 22:05:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1409 transitions. [2023-11-24 22:05:23,905 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1409 transitions. Word has length 144 [2023-11-24 22:05:23,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:23,906 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 1409 transitions. [2023-11-24 22:05:23,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:23,906 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1409 transitions. [2023-11-24 22:05:23,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-24 22:05:23,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:23,910 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:23,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 22:05:24,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:24,123 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:24,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:24,124 INFO L85 PathProgramCache]: Analyzing trace with hash -775272374, now seen corresponding path program 1 times [2023-11-24 22:05:24,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:24,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669664184] [2023-11-24 22:05:24,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:24,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:24,197 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:05:24,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1838839796] [2023-11-24 22:05:24,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:24,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:24,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:24,201 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:05:24,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 22:05:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:24,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:05:24,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 22:05:24,674 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:05:24,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:24,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669664184] [2023-11-24 22:05:24,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:05:24,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838839796] [2023-11-24 22:05:24,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838839796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:24,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:24,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:05:24,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802441934] [2023-11-24 22:05:24,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:24,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:05:24,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:24,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:05:24,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:05:24,677 INFO L87 Difference]: Start difference. First operand 931 states and 1409 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:24,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:24,846 INFO L93 Difference]: Finished difference Result 1429 states and 2177 transitions. [2023-11-24 22:05:24,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:05:24,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2023-11-24 22:05:24,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:24,852 INFO L225 Difference]: With dead ends: 1429 [2023-11-24 22:05:24,853 INFO L226 Difference]: Without dead ends: 918 [2023-11-24 22:05:24,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 141 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 22:05:24,855 INFO L413 NwaCegarLoop]: 1351 mSDtfsCounter, 165 mSDsluCounter, 2550 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 3901 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 22:05:24,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 3901 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:05:24,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2023-11-24 22:05:24,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 917. [2023-11-24 22:05:24,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 899 states have (on average 1.513904338153504) internal successors, (1361), 904 states have internal predecessors, (1361), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-24 22:05:24,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1388 transitions. [2023-11-24 22:05:24,888 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1388 transitions. Word has length 144 [2023-11-24 22:05:24,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:24,888 INFO L495 AbstractCegarLoop]: Abstraction has 917 states and 1388 transitions. [2023-11-24 22:05:24,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:24,889 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1388 transitions. [2023-11-24 22:05:24,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-24 22:05:24,891 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:24,892 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:24,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-24 22:05:25,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:25,100 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:25,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:25,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1204877692, now seen corresponding path program 1 times [2023-11-24 22:05:25,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:25,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674667998] [2023-11-24 22:05:25,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:25,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:25,170 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:05:25,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868287925] [2023-11-24 22:05:25,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:25,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:25,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:25,173 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:05:25,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 22:05:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:25,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 22:05:25,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:25,998 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:05:25,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:25,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674667998] [2023-11-24 22:05:25,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:05:25,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868287925] [2023-11-24 22:05:25,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868287925] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:26,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:26,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:05:26,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203667478] [2023-11-24 22:05:26,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:26,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:26,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:26,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:26,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:05:26,004 INFO L87 Difference]: Start difference. First operand 917 states and 1388 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:26,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:26,150 INFO L93 Difference]: Finished difference Result 2372 states and 3606 transitions. [2023-11-24 22:05:26,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:26,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2023-11-24 22:05:26,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:26,161 INFO L225 Difference]: With dead ends: 2372 [2023-11-24 22:05:26,161 INFO L226 Difference]: Without dead ends: 1458 [2023-11-24 22:05:26,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 142 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 22:05:26,167 INFO L413 NwaCegarLoop]: 1757 mSDtfsCounter, 765 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 3102 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:05:26,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 3102 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:05:26,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2023-11-24 22:05:26,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1453. [2023-11-24 22:05:26,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1430 states have (on average 1.5223776223776224) internal successors, (2177), 1435 states have internal predecessors, (2177), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-24 22:05:26,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 2214 transitions. [2023-11-24 22:05:26,229 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 2214 transitions. Word has length 144 [2023-11-24 22:05:26,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:26,229 INFO L495 AbstractCegarLoop]: Abstraction has 1453 states and 2214 transitions. [2023-11-24 22:05:26,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:26,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 2214 transitions. [2023-11-24 22:05:26,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-11-24 22:05:26,233 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:26,233 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:26,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 22:05:26,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:26,442 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:26,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:26,442 INFO L85 PathProgramCache]: Analyzing trace with hash 996362322, now seen corresponding path program 1 times [2023-11-24 22:05:26,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:26,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148781183] [2023-11-24 22:05:26,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:26,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:26,512 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:05:26,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919937097] [2023-11-24 22:05:26,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:26,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:26,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:26,513 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:05:26,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 22:05:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:27,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 22:05:27,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:27,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 22:05:27,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:05:27,135 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:05:27,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:27,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148781183] [2023-11-24 22:05:27,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:05:27,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919937097] [2023-11-24 22:05:27,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919937097] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:27,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:27,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:05:27,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617214979] [2023-11-24 22:05:27,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:27,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:05:27,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:27,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:05:27,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:05:27,140 INFO L87 Difference]: Start difference. First operand 1453 states and 2214 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:05:27,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:27,343 INFO L93 Difference]: Finished difference Result 2790 states and 4244 transitions. [2023-11-24 22:05:27,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:05:27,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 157 [2023-11-24 22:05:27,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:27,354 INFO L225 Difference]: With dead ends: 2790 [2023-11-24 22:05:27,354 INFO L226 Difference]: Without dead ends: 1511 [2023-11-24 22:05:27,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 154 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 22:05:27,358 INFO L413 NwaCegarLoop]: 1367 mSDtfsCounter, 490 mSDsluCounter, 2677 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 4044 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:05:27,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 4044 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:05:27,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2023-11-24 22:05:27,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1453. [2023-11-24 22:05:27,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1430 states have (on average 1.5216783216783216) internal successors, (2176), 1435 states have internal predecessors, (2176), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-24 22:05:27,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 2213 transitions. [2023-11-24 22:05:27,416 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 2213 transitions. Word has length 157 [2023-11-24 22:05:27,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:27,417 INFO L495 AbstractCegarLoop]: Abstraction has 1453 states and 2213 transitions. [2023-11-24 22:05:27,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:05:27,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 2213 transitions. [2023-11-24 22:05:27,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-11-24 22:05:27,422 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:27,423 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:05:27,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 22:05:27,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:27,631 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:27,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:27,632 INFO L85 PathProgramCache]: Analyzing trace with hash -724354809, now seen corresponding path program 1 times [2023-11-24 22:05:27,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:27,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734075905] [2023-11-24 22:05:27,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:27,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:27,727 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:05:27,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582400798] [2023-11-24 22:05:27,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:27,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:27,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:27,729 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:05:27,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 22:05:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:28,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:05:28,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:05:28,370 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:05:28,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:28,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734075905] [2023-11-24 22:05:28,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:05:28,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582400798] [2023-11-24 22:05:28,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582400798] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:28,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:28,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:05:28,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832243981] [2023-11-24 22:05:28,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:28,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:28,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:28,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:28,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:05:28,374 INFO L87 Difference]: Start difference. First operand 1453 states and 2213 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:05:28,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:28,497 INFO L93 Difference]: Finished difference Result 2895 states and 4405 transitions. [2023-11-24 22:05:28,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:28,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 228 [2023-11-24 22:05:28,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:28,507 INFO L225 Difference]: With dead ends: 2895 [2023-11-24 22:05:28,507 INFO L226 Difference]: Without dead ends: 1495 [2023-11-24 22:05:28,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 226 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 22:05:28,510 INFO L413 NwaCegarLoop]: 1351 mSDtfsCounter, 9 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2688 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 22:05:28,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 2688 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:05:28,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2023-11-24 22:05:28,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 1493. [2023-11-24 22:05:28,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1493 states, 1470 states have (on average 1.5074829931972789) internal successors, (2216), 1475 states have internal predecessors, (2216), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-24 22:05:28,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2253 transitions. [2023-11-24 22:05:28,596 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2253 transitions. Word has length 228 [2023-11-24 22:05:28,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:28,596 INFO L495 AbstractCegarLoop]: Abstraction has 1493 states and 2253 transitions. [2023-11-24 22:05:28,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:05:28,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2253 transitions. [2023-11-24 22:05:28,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-11-24 22:05:28,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:28,605 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:05:28,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-24 22:05:28,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-24 22:05:28,814 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:28,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:28,815 INFO L85 PathProgramCache]: Analyzing trace with hash -854219387, now seen corresponding path program 1 times [2023-11-24 22:05:28,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:28,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430601406] [2023-11-24 22:05:28,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:28,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:28,911 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:05:28,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808591596] [2023-11-24 22:05:28,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:28,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:28,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:28,913 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:05:28,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 22:05:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:29,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:05:29,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:05:29,582 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:05:29,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:29,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430601406] [2023-11-24 22:05:29,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:05:29,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808591596] [2023-11-24 22:05:29,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808591596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:29,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:29,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:05:29,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204809836] [2023-11-24 22:05:29,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:29,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:05:29,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:29,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:05:29,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:05:29,586 INFO L87 Difference]: Start difference. First operand 1493 states and 2253 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:05:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:29,720 INFO L93 Difference]: Finished difference Result 2889 states and 4370 transitions. [2023-11-24 22:05:29,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:05:29,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 228 [2023-11-24 22:05:29,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:29,729 INFO L225 Difference]: With dead ends: 2889 [2023-11-24 22:05:29,729 INFO L226 Difference]: Without dead ends: 1467 [2023-11-24 22:05:29,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 225 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 22:05:29,733 INFO L413 NwaCegarLoop]: 1344 mSDtfsCounter, 165 mSDsluCounter, 2536 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 3880 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 22:05:29,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 3880 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:05:29,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2023-11-24 22:05:29,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1465. [2023-11-24 22:05:29,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1442 states have (on average 1.507628294036061) internal successors, (2174), 1447 states have internal predecessors, (2174), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-24 22:05:29,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 2211 transitions. [2023-11-24 22:05:29,784 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 2211 transitions. Word has length 228 [2023-11-24 22:05:29,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:29,784 INFO L495 AbstractCegarLoop]: Abstraction has 1465 states and 2211 transitions. [2023-11-24 22:05:29,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:05:29,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 2211 transitions. [2023-11-24 22:05:29,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-11-24 22:05:29,789 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:29,789 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:05:29,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 22:05:29,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 22:05:29,999 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:29,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:29,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1118933485, now seen corresponding path program 1 times [2023-11-24 22:05:29,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:30,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088097719] [2023-11-24 22:05:30,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:30,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:30,087 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:05:30,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736667450] [2023-11-24 22:05:30,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:30,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:30,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:30,089 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:05:30,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 22:05:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:30,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 22:05:30,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:31,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:05:31,081 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:05:31,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:31,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088097719] [2023-11-24 22:05:31,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:05:31,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736667450] [2023-11-24 22:05:31,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736667450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:31,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:31,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:05:31,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608656727] [2023-11-24 22:05:31,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:31,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:31,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:31,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:31,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:05:31,086 INFO L87 Difference]: Start difference. First operand 1465 states and 2211 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:05:31,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:31,208 INFO L93 Difference]: Finished difference Result 3418 states and 5203 transitions. [2023-11-24 22:05:31,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:31,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 228 [2023-11-24 22:05:31,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:31,222 INFO L225 Difference]: With dead ends: 3418 [2023-11-24 22:05:31,222 INFO L226 Difference]: Without dead ends: 2083 [2023-11-24 22:05:31,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 226 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 22:05:31,225 INFO L413 NwaCegarLoop]: 1362 mSDtfsCounter, 725 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 2699 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:05:31,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 2699 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:05:31,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2023-11-24 22:05:31,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1828. [2023-11-24 22:05:31,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1802 states have (on average 1.5205327413984462) internal successors, (2740), 1807 states have internal predecessors, (2740), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-24 22:05:31,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 2783 transitions. [2023-11-24 22:05:31,292 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 2783 transitions. Word has length 228 [2023-11-24 22:05:31,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:31,293 INFO L495 AbstractCegarLoop]: Abstraction has 1828 states and 2783 transitions. [2023-11-24 22:05:31,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:05:31,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 2783 transitions. [2023-11-24 22:05:31,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2023-11-24 22:05:31,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:31,299 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:31,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 22:05:31,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-24 22:05:31,510 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:31,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:31,510 INFO L85 PathProgramCache]: Analyzing trace with hash 2130753096, now seen corresponding path program 1 times [2023-11-24 22:05:31,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:31,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287744190] [2023-11-24 22:05:31,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:31,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:31,610 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:05:31,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343911395] [2023-11-24 22:05:31,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:31,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:31,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:31,612 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:05:31,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 22:05:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:32,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 22:05:32,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-24 22:05:32,813 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:05:32,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:32,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287744190] [2023-11-24 22:05:32,814 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:05:32,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343911395] [2023-11-24 22:05:32,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343911395] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:32,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:32,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:05:32,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941382378] [2023-11-24 22:05:32,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:32,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:05:32,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:32,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:05:32,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:05:32,818 INFO L87 Difference]: Start difference. First operand 1828 states and 2783 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-24 22:05:33,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:33,361 INFO L93 Difference]: Finished difference Result 2989 states and 4549 transitions. [2023-11-24 22:05:33,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:05:33,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 241 [2023-11-24 22:05:33,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:33,372 INFO L225 Difference]: With dead ends: 2989 [2023-11-24 22:05:33,372 INFO L226 Difference]: Without dead ends: 1454 [2023-11-24 22:05:33,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 239 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 22:05:33,376 INFO L413 NwaCegarLoop]: 1460 mSDtfsCounter, 2420 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2420 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 22:05:33,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2420 Valid, 1701 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 22:05:33,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2023-11-24 22:05:33,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1454. [2023-11-24 22:05:33,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1433 states have (on average 1.5073272854152129) internal successors, (2160), 1438 states have internal predecessors, (2160), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-24 22:05:33,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 2193 transitions. [2023-11-24 22:05:33,426 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 2193 transitions. Word has length 241 [2023-11-24 22:05:33,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:33,428 INFO L495 AbstractCegarLoop]: Abstraction has 1454 states and 2193 transitions. [2023-11-24 22:05:33,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-24 22:05:33,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 2193 transitions. [2023-11-24 22:05:33,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-11-24 22:05:33,433 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:33,434 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:33,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 22:05:33,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-24 22:05:33,645 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:33,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:33,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1394879045, now seen corresponding path program 1 times [2023-11-24 22:05:33,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:33,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228699390] [2023-11-24 22:05:33,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:33,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:33,743 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:05:33,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1366638395] [2023-11-24 22:05:33,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:33,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:33,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:33,745 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:05:33,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 22:05:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:34,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 1244 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 22:05:34,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:34,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 22:05:35,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-24 22:05:35,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 22:05:35,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-24 22:05:35,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:05:35,546 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-24 22:05:35,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:35,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228699390] [2023-11-24 22:05:35,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:05:35,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366638395] [2023-11-24 22:05:35,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366638395] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:05:35,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:05:35,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-24 22:05:35,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190546270] [2023-11-24 22:05:35,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 22:05:35,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 22:05:35,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:35,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 22:05:35,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-24 22:05:35,550 INFO L87 Difference]: Start difference. First operand 1454 states and 2193 transitions. Second operand has 9 states, 9 states have (on average 44.22222222222222) internal successors, (398), 9 states have internal predecessors, (398), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 22:05:36,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:36,199 INFO L93 Difference]: Finished difference Result 3363 states and 5041 transitions. [2023-11-24 22:05:36,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 22:05:36,200 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 44.22222222222222) internal successors, (398), 9 states have internal predecessors, (398), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 251 [2023-11-24 22:05:36,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:36,215 INFO L225 Difference]: With dead ends: 3363 [2023-11-24 22:05:36,215 INFO L226 Difference]: Without dead ends: 2550 [2023-11-24 22:05:36,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 486 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-24 22:05:36,218 INFO L413 NwaCegarLoop]: 1302 mSDtfsCounter, 2782 mSDsluCounter, 6212 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2797 SdHoareTripleChecker+Valid, 7514 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 22:05:36,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2797 Valid, 7514 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 22:05:36,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2023-11-24 22:05:36,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 2207. [2023-11-24 22:05:36,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2174 states have (on average 1.484360625574977) internal successors, (3227), 2179 states have internal predecessors, (3227), 28 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-24 22:05:36,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 3282 transitions. [2023-11-24 22:05:36,304 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 3282 transitions. Word has length 251 [2023-11-24 22:05:36,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:36,305 INFO L495 AbstractCegarLoop]: Abstraction has 2207 states and 3282 transitions. [2023-11-24 22:05:36,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 44.22222222222222) internal successors, (398), 9 states have internal predecessors, (398), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 22:05:36,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 3282 transitions. [2023-11-24 22:05:36,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2023-11-24 22:05:36,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:36,318 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:05:36,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-24 22:05:36,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:36,528 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:36,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:36,528 INFO L85 PathProgramCache]: Analyzing trace with hash -326824097, now seen corresponding path program 1 times [2023-11-24 22:05:36,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:36,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656683273] [2023-11-24 22:05:36,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:36,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:36,750 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:05:36,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37562688] [2023-11-24 22:05:36,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:36,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:36,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:36,752 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:05:36,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-24 22:05:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:37,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 2339 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 22:05:37,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:37,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 22:05:38,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-24 22:05:38,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 22:05:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 234 proven. 5 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-11-24 22:05:38,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:05:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 234 proven. 5 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-11-24 22:05:38,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:38,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656683273] [2023-11-24 22:05:38,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:05:38,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37562688] [2023-11-24 22:05:38,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37562688] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:05:38,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:05:38,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-24 22:05:38,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690861801] [2023-11-24 22:05:38,793 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 22:05:38,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 22:05:38,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:38,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 22:05:38,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-24 22:05:38,796 INFO L87 Difference]: Start difference. First operand 2207 states and 3282 transitions. Second operand has 9 states, 9 states have (on average 53.55555555555556) internal successors, (482), 9 states have internal predecessors, (482), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 22:05:39,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:39,405 INFO L93 Difference]: Finished difference Result 4233 states and 6305 transitions. [2023-11-24 22:05:39,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 22:05:39,406 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 53.55555555555556) internal successors, (482), 9 states have internal predecessors, (482), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 482 [2023-11-24 22:05:39,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:39,422 INFO L225 Difference]: With dead ends: 4233 [2023-11-24 22:05:39,422 INFO L226 Difference]: Without dead ends: 2550 [2023-11-24 22:05:39,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 948 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-24 22:05:39,426 INFO L413 NwaCegarLoop]: 1330 mSDtfsCounter, 3590 mSDsluCounter, 5339 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3604 SdHoareTripleChecker+Valid, 6669 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 22:05:39,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3604 Valid, 6669 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 22:05:39,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2023-11-24 22:05:39,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 2210. [2023-11-24 22:05:39,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2210 states, 2177 states have (on average 1.4827744602664217) internal successors, (3228), 2182 states have internal predecessors, (3228), 28 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-24 22:05:39,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2210 states to 2210 states and 3283 transitions. [2023-11-24 22:05:39,517 INFO L78 Accepts]: Start accepts. Automaton has 2210 states and 3283 transitions. Word has length 482 [2023-11-24 22:05:39,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:39,517 INFO L495 AbstractCegarLoop]: Abstraction has 2210 states and 3283 transitions. [2023-11-24 22:05:39,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 53.55555555555556) internal successors, (482), 9 states have internal predecessors, (482), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 22:05:39,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2210 states and 3283 transitions. [2023-11-24 22:05:39,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 696 [2023-11-24 22:05:39,541 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:39,541 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:39,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-24 22:05:39,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:39,762 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:39,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:39,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1706140764, now seen corresponding path program 1 times [2023-11-24 22:05:39,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:39,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934932026] [2023-11-24 22:05:39,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:39,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:40,057 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:05:40,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727383987] [2023-11-24 22:05:40,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:40,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:40,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:40,059 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:05:40,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-24 22:05:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:41,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 3296 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-24 22:05:41,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:41,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 22:05:42,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-24 22:05:42,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 22:05:42,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 22:05:43,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 22:05:43,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 22:05:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 884 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-24 22:05:43,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:05:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 884 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-24 22:05:44,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:44,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934932026] [2023-11-24 22:05:44,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:05:44,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727383987] [2023-11-24 22:05:44,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727383987] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:05:44,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:05:44,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-24 22:05:44,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586804913] [2023-11-24 22:05:44,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 22:05:44,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 22:05:44,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:44,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 22:05:44,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-24 22:05:44,336 INFO L87 Difference]: Start difference. First operand 2210 states and 3283 transitions. Second operand has 15 states, 15 states have (on average 85.73333333333333) internal successors, (1286), 15 states have internal predecessors, (1286), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 22:05:45,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:45,625 INFO L93 Difference]: Finished difference Result 5433 states and 8059 transitions. [2023-11-24 22:05:45,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-24 22:05:45,627 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 85.73333333333333) internal successors, (1286), 15 states have internal predecessors, (1286), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 695 [2023-11-24 22:05:45,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:45,654 INFO L225 Difference]: With dead ends: 5433 [2023-11-24 22:05:45,654 INFO L226 Difference]: Without dead ends: 4620 [2023-11-24 22:05:45,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1398 GetRequests, 1368 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2023-11-24 22:05:45,657 INFO L413 NwaCegarLoop]: 1302 mSDtfsCounter, 10569 mSDsluCounter, 13184 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10608 SdHoareTripleChecker+Valid, 14486 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 22:05:45,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10608 Valid, 14486 Invalid, 686 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [30 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 22:05:45,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4620 states. [2023-11-24 22:05:45,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4620 to 4277. [2023-11-24 22:05:45,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4277 states, 4220 states have (on average 1.4677725118483411) internal successors, (6194), 4225 states have internal predecessors, (6194), 52 states have call successors, (52), 4 states have call predecessors, (52), 4 states have return successors, (51), 48 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-24 22:05:45,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4277 states to 4277 states and 6297 transitions. [2023-11-24 22:05:45,815 INFO L78 Accepts]: Start accepts. Automaton has 4277 states and 6297 transitions. Word has length 695 [2023-11-24 22:05:45,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:45,817 INFO L495 AbstractCegarLoop]: Abstraction has 4277 states and 6297 transitions. [2023-11-24 22:05:45,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 85.73333333333333) internal successors, (1286), 15 states have internal predecessors, (1286), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 22:05:45,817 INFO L276 IsEmpty]: Start isEmpty. Operand 4277 states and 6297 transitions. [2023-11-24 22:05:45,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1158 [2023-11-24 22:05:45,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:45,841 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:05:45,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-24 22:05:46,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-24 22:05:46,058 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:46,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:46,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1698273436, now seen corresponding path program 1 times [2023-11-24 22:05:46,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:46,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784243308] [2023-11-24 22:05:46,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:46,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:46,478 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:05:46,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864772861] [2023-11-24 22:05:46,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:46,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:46,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:46,481 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:05:46,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-24 22:05:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:48,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 5486 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-24 22:05:49,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:49,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 22:05:49,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-24 22:05:49,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 22:05:49,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 22:05:50,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 22:05:50,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 22:05:50,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3905 backedges. 1851 proven. 896 refuted. 0 times theorem prover too weak. 1158 trivial. 0 not checked. [2023-11-24 22:05:50,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:05:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3905 backedges. 1851 proven. 896 refuted. 0 times theorem prover too weak. 1158 trivial. 0 not checked. [2023-11-24 22:05:51,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:51,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784243308] [2023-11-24 22:05:51,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:05:51,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864772861] [2023-11-24 22:05:51,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864772861] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:05:51,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:05:51,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-24 22:05:51,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773743212] [2023-11-24 22:05:51,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 22:05:51,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 22:05:51,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:51,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 22:05:51,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-24 22:05:51,269 INFO L87 Difference]: Start difference. First operand 4277 states and 6297 transitions. Second operand has 15 states, 15 states have (on average 91.33333333333333) internal successors, (1370), 15 states have internal predecessors, (1370), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 22:05:52,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:52,327 INFO L93 Difference]: Finished difference Result 7338 states and 10829 transitions. [2023-11-24 22:05:52,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-24 22:05:52,328 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 91.33333333333333) internal successors, (1370), 15 states have internal predecessors, (1370), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 1157 [2023-11-24 22:05:52,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:52,343 INFO L225 Difference]: With dead ends: 7338 [2023-11-24 22:05:52,343 INFO L226 Difference]: Without dead ends: 4620 [2023-11-24 22:05:52,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2322 GetRequests, 2292 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2023-11-24 22:05:52,348 INFO L413 NwaCegarLoop]: 1330 mSDtfsCounter, 7881 mSDsluCounter, 12781 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7919 SdHoareTripleChecker+Valid, 14111 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:05:52,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7919 Valid, 14111 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 22:05:52,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4620 states. [2023-11-24 22:05:52,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4620 to 4280. [2023-11-24 22:05:52,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4280 states, 4223 states have (on average 1.466256215960218) internal successors, (6192), 4228 states have internal predecessors, (6192), 52 states have call successors, (52), 4 states have call predecessors, (52), 4 states have return successors, (51), 48 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-24 22:05:52,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4280 states to 4280 states and 6295 transitions. [2023-11-24 22:05:52,500 INFO L78 Accepts]: Start accepts. Automaton has 4280 states and 6295 transitions. Word has length 1157 [2023-11-24 22:05:52,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:52,502 INFO L495 AbstractCegarLoop]: Abstraction has 4280 states and 6295 transitions. [2023-11-24 22:05:52,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 91.33333333333333) internal successors, (1370), 15 states have internal predecessors, (1370), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 22:05:52,503 INFO L276 IsEmpty]: Start isEmpty. Operand 4280 states and 6295 transitions. [2023-11-24 22:05:52,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1584 [2023-11-24 22:05:52,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:52,534 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1] [2023-11-24 22:05:52,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-24 22:05:52,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-24 22:05:52,745 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:52,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:52,745 INFO L85 PathProgramCache]: Analyzing trace with hash -618244874, now seen corresponding path program 2 times [2023-11-24 22:05:52,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:52,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753180944] [2023-11-24 22:05:52,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:52,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:53,382 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:05:53,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285326782] [2023-11-24 22:05:53,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 22:05:53,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:53,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:53,396 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:05:53,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aca8721e-5217-41db-90bd-d16569bf147a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-24 22:05:55,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-24 22:05:55,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:05:55,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-24 22:05:55,324 INFO L285 TraceCheckSpWp]: Computing forward predicates...