./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test1-1.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_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya --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 a2f43006c9a8080eee594d7c3e874c7ea5bb3a923f26b30531e1d07ef5cff7d9 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:18:16,531 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:18:16,598 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 04:18:16,603 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:18:16,604 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:18:16,628 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:18:16,629 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:18:16,629 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:18:16,630 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:18:16,631 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:18:16,631 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:18:16,632 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:18:16,633 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:18:16,633 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:18:16,634 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:18:16,634 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:18:16,635 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 04:18:16,635 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:18:16,636 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:18:16,636 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:18:16,637 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:18:16,637 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 04:18:16,638 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:18:16,638 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 04:18:16,639 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:18:16,639 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 04:18:16,639 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:18:16,640 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:18:16,640 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:18:16,640 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:18:16,641 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:18:16,641 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:18:16,641 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:18:16,642 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:18:16,642 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 04:18:16,642 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:18:16,642 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:18:16,642 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:18:16,643 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:18:16,643 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 04:18:16,643 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:18:16,643 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:18:16,644 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_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a2f43006c9a8080eee594d7c3e874c7ea5bb3a923f26b30531e1d07ef5cff7d9 [2023-11-29 04:18:16,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:18:16,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:18:16,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:18:16,915 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:18:16,916 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:18:16,917 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test1-1.i [2023-11-29 04:18:19,700 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:18:19,951 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:18:19,952 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test1-1.i [2023-11-29 04:18:19,970 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/data/776afac00/1290be37b53c42a7922da20e88282fed/FLAGe483a804a [2023-11-29 04:18:19,983 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/data/776afac00/1290be37b53c42a7922da20e88282fed [2023-11-29 04:18:19,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:18:19,994 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:18:19,995 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:18:19,995 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:18:20,000 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:18:20,001 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:18:19" (1/1) ... [2023-11-29 04:18:20,003 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29d702d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:18:20, skipping insertion in model container [2023-11-29 04:18:20,003 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:18:19" (1/1) ... [2023-11-29 04:18:20,066 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:18:20,441 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_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test1-1.i[33021,33034] [2023-11-29 04:18:20,523 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:18:20,534 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:18:20,569 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_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test1-1.i[33021,33034] [2023-11-29 04:18:20,612 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:18:20,678 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:18:20,678 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:18:20 WrapperNode [2023-11-29 04:18:20,679 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:18:20,680 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:18:20,680 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:18:20,680 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:18:20,687 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:18:20" (1/1) ... [2023-11-29 04:18:20,716 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:18:20" (1/1) ... [2023-11-29 04:18:20,775 INFO L138 Inliner]: procedures = 177, calls = 186, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 790 [2023-11-29 04:18:20,776 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:18:20,777 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:18:20,777 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:18:20,777 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:18:20,789 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:18:20" (1/1) ... [2023-11-29 04:18:20,789 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:18:20" (1/1) ... [2023-11-29 04:18:20,799 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:18:20" (1/1) ... [2023-11-29 04:18:20,855 INFO L175 MemorySlicer]: Split 163 memory accesses to 3 slices as follows [2, 5, 156]. 96 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 43 writes are split as follows [0, 1, 42]. [2023-11-29 04:18:20,856 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:18:20" (1/1) ... [2023-11-29 04:18:20,856 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:18:20" (1/1) ... [2023-11-29 04:18:20,891 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:18:20" (1/1) ... [2023-11-29 04:18:20,902 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:18:20" (1/1) ... [2023-11-29 04:18:20,907 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:18:20" (1/1) ... [2023-11-29 04:18:20,913 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:18:20" (1/1) ... [2023-11-29 04:18:20,921 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:18:20,922 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:18:20,922 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:18:20,922 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:18:20,923 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:18:20" (1/1) ... [2023-11-29 04:18:20,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:18:20,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:18:20,956 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:18:20,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:18:20,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 04:18:21,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 04:18:21,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 04:18:21,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 04:18:21,000 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 04:18:21,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 04:18:21,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 04:18:21,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 04:18:21,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2023-11-29 04:18:21,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2023-11-29 04:18:21,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2023-11-29 04:18:21,001 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2023-11-29 04:18:21,001 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2023-11-29 04:18:21,001 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2023-11-29 04:18:21,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 04:18:21,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:18:21,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 04:18:21,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 04:18:21,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 04:18:21,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-29 04:18:21,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 04:18:21,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 04:18:21,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-29 04:18:21,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 04:18:21,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:18:21,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 04:18:21,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 04:18:21,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:18:21,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:18:21,196 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:18:21,198 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:18:22,110 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:18:22,148 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:18:22,148 INFO L309 CfgBuilder]: Removed 31 assume(true) statements. [2023-11-29 04:18:22,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:18:22 BoogieIcfgContainer [2023-11-29 04:18:22,149 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:18:22,151 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:18:22,152 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:18:22,155 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:18:22,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:18:19" (1/3) ... [2023-11-29 04:18:22,155 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e46322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:18:22, skipping insertion in model container [2023-11-29 04:18:22,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:18:20" (2/3) ... [2023-11-29 04:18:22,156 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e46322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:18:22, skipping insertion in model container [2023-11-29 04:18:22,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:18:22" (3/3) ... [2023-11-29 04:18:22,157 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_BER_test1-1.i [2023-11-29 04:18:22,173 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:18:22,173 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 04:18:22,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:18:22,229 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;@28e60cb2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:18:22,230 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 04:18:22,234 INFO L276 IsEmpty]: Start isEmpty. Operand has 207 states, 190 states have (on average 1.7052631578947368) internal successors, (324), 201 states have internal predecessors, (324), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 04:18:22,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 04:18:22,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:18:22,241 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:18:22,242 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:18:22,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:18:22,246 INFO L85 PathProgramCache]: Analyzing trace with hash -189480315, now seen corresponding path program 1 times [2023-11-29 04:18:22,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:18:22,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088750672] [2023-11-29 04:18:22,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:18:22,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:18:22,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:18:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:18:22,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:18:22,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088750672] [2023-11-29 04:18:22,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088750672] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:18:22,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:18:22,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:18:22,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600147484] [2023-11-29 04:18:22,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:18:22,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:18:22,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:18:22,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:18:22,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:18:22,468 INFO L87 Difference]: Start difference. First operand has 207 states, 190 states have (on average 1.7052631578947368) internal successors, (324), 201 states have internal predecessors, (324), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:18:22,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:18:22,574 INFO L93 Difference]: Finished difference Result 585 states and 1003 transitions. [2023-11-29 04:18:22,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:18:22,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-29 04:18:22,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:18:22,592 INFO L225 Difference]: With dead ends: 585 [2023-11-29 04:18:22,592 INFO L226 Difference]: Without dead ends: 377 [2023-11-29 04:18:22,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:18:22,600 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 252 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:18:22,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 653 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:18:22,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2023-11-29 04:18:22,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 206. [2023-11-29 04:18:22,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 190 states have (on average 1.5105263157894737) internal successors, (287), 200 states have internal predecessors, (287), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 04:18:22,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 313 transitions. [2023-11-29 04:18:22,665 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 313 transitions. Word has length 9 [2023-11-29 04:18:22,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:18:22,665 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 313 transitions. [2023-11-29 04:18:22,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:18:22,666 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 313 transitions. [2023-11-29 04:18:22,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-29 04:18:22,670 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:18:22,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:18:22,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 04:18:22,671 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:18:22,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:18:22,672 INFO L85 PathProgramCache]: Analyzing trace with hash -40822134, now seen corresponding path program 1 times [2023-11-29 04:18:22,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:18:22,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443135152] [2023-11-29 04:18:22,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:18:22,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:18:22,739 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:18:22,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635361409] [2023-11-29 04:18:22,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:18:22,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:18:22,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:18:22,745 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:18:22,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 04:18:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:18:23,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 04:18:23,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:18:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:18:23,091 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:18:23,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:18:23,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443135152] [2023-11-29 04:18:23,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:18:23,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635361409] [2023-11-29 04:18:23,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635361409] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:18:23,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:18:23,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:18:23,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666444389] [2023-11-29 04:18:23,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:18:23,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:18:23,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:18:23,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:18:23,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:18:23,096 INFO L87 Difference]: Start difference. First operand 206 states and 313 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:18:23,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:18:23,201 INFO L93 Difference]: Finished difference Result 431 states and 655 transitions. [2023-11-29 04:18:23,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:18:23,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2023-11-29 04:18:23,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:18:23,204 INFO L225 Difference]: With dead ends: 431 [2023-11-29 04:18:23,205 INFO L226 Difference]: Without dead ends: 227 [2023-11-29 04:18:23,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:18:23,208 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 9 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 564 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 [2023-11-29 04:18:23,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 564 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:18:23,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-29 04:18:23,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2023-11-29 04:18:23,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 210 states have (on average 1.4619047619047618) internal successors, (307), 220 states have internal predecessors, (307), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 04:18:23,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 333 transitions. [2023-11-29 04:18:23,229 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 333 transitions. Word has length 84 [2023-11-29 04:18:23,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:18:23,229 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 333 transitions. [2023-11-29 04:18:23,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:18:23,230 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 333 transitions. [2023-11-29 04:18:23,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-29 04:18:23,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:18:23,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:18:23,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 04:18:23,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:18:23,438 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:18:23,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:18:23,439 INFO L85 PathProgramCache]: Analyzing trace with hash 451804040, now seen corresponding path program 1 times [2023-11-29 04:18:23,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:18:23,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039026151] [2023-11-29 04:18:23,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:18:23,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:18:23,495 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:18:23,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348251024] [2023-11-29 04:18:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:18:23,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:18:23,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:18:23,497 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:18:23,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 04:18:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:18:23,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 04:18:23,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:18:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:18:23,819 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:18:23,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:18:23,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039026151] [2023-11-29 04:18:23,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:18:23,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348251024] [2023-11-29 04:18:23,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348251024] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:18:23,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:18:23,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:18:23,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054377140] [2023-11-29 04:18:23,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:18:23,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:18:23,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:18:23,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:18:23,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:18:23,823 INFO L87 Difference]: Start difference. First operand 226 states and 333 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:18:23,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:18:23,923 INFO L93 Difference]: Finished difference Result 437 states and 651 transitions. [2023-11-29 04:18:23,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:18:23,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2023-11-29 04:18:23,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:18:23,926 INFO L225 Difference]: With dead ends: 437 [2023-11-29 04:18:23,926 INFO L226 Difference]: Without dead ends: 213 [2023-11-29 04:18:23,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:18:23,929 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 165 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 694 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 [2023-11-29 04:18:23,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 694 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:18:23,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-29 04:18:23,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2023-11-29 04:18:23,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 196 states have (on average 1.4591836734693877) internal successors, (286), 206 states have internal predecessors, (286), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 04:18:23,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 312 transitions. [2023-11-29 04:18:23,945 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 312 transitions. Word has length 84 [2023-11-29 04:18:23,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:18:23,945 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 312 transitions. [2023-11-29 04:18:23,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:18:23,946 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 312 transitions. [2023-11-29 04:18:23,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-29 04:18:23,948 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:18:23,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:18:23,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 04:18:24,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:18:24,156 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:18:24,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:18:24,156 INFO L85 PathProgramCache]: Analyzing trace with hash -209873770, now seen corresponding path program 1 times [2023-11-29 04:18:24,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:18:24,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890671313] [2023-11-29 04:18:24,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:18:24,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:18:24,206 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:18:24,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [79943420] [2023-11-29 04:18:24,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:18:24,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:18:24,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:18:24,208 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:18:24,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 04:18:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:18:24,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 04:18:24,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:18:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:18:24,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:18:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:18:24,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:18:24,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890671313] [2023-11-29 04:18:24,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:18:24,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79943420] [2023-11-29 04:18:24,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79943420] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:18:24,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:18:24,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-29 04:18:24,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889407554] [2023-11-29 04:18:24,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:18:24,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 04:18:24,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:18:24,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 04:18:24,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 04:18:24,713 INFO L87 Difference]: Start difference. First operand 212 states and 312 transitions. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:18:24,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:18:24,840 INFO L93 Difference]: Finished difference Result 775 states and 1137 transitions. [2023-11-29 04:18:24,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:18:24,841 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2023-11-29 04:18:24,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:18:24,847 INFO L225 Difference]: With dead ends: 775 [2023-11-29 04:18:24,847 INFO L226 Difference]: Without dead ends: 746 [2023-11-29 04:18:24,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 04:18:24,849 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 1003 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:18:24,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1015 Valid, 1184 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:18:24,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2023-11-29 04:18:24,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 746. [2023-11-29 04:18:24,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 721 states have (on average 1.4452149791955617) internal successors, (1042), 731 states have internal predecessors, (1042), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-29 04:18:24,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1086 transitions. [2023-11-29 04:18:24,886 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1086 transitions. Word has length 84 [2023-11-29 04:18:24,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:18:24,887 INFO L495 AbstractCegarLoop]: Abstraction has 746 states and 1086 transitions. [2023-11-29 04:18:24,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:18:24,887 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1086 transitions. [2023-11-29 04:18:24,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-29 04:18:24,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:18:24,896 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:18:24,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 04:18:25,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:18:25,102 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:18:25,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:18:25,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1375306053, now seen corresponding path program 2 times [2023-11-29 04:18:25,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:18:25,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764522198] [2023-11-29 04:18:25,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:18:25,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:18:25,251 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:18:25,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011435418] [2023-11-29 04:18:25,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:18:25,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:18:25,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:18:25,254 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:18:25,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 04:18:25,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 04:18:25,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:18:25,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 04:18:25,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:18:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-11-29 04:18:26,853 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:18:26,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:18:26,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764522198] [2023-11-29 04:18:26,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:18:26,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011435418] [2023-11-29 04:18:26,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011435418] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:18:26,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:18:26,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:18:26,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259443007] [2023-11-29 04:18:26,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:18:26,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:18:26,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:18:26,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:18:26,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:18:26,856 INFO L87 Difference]: Start difference. First operand 746 states and 1086 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:18:27,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:18:27,093 INFO L93 Difference]: Finished difference Result 1362 states and 1980 transitions. [2023-11-29 04:18:27,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:18:27,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 309 [2023-11-29 04:18:27,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:18:27,099 INFO L225 Difference]: With dead ends: 1362 [2023-11-29 04:18:27,099 INFO L226 Difference]: Without dead ends: 744 [2023-11-29 04:18:27,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:18:27,101 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 123 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:18:27,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 856 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:18:27,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2023-11-29 04:18:27,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2023-11-29 04:18:27,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 719 states have (on average 1.4450625869262865) internal successors, (1039), 729 states have internal predecessors, (1039), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-29 04:18:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1083 transitions. [2023-11-29 04:18:27,130 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1083 transitions. Word has length 309 [2023-11-29 04:18:27,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:18:27,131 INFO L495 AbstractCegarLoop]: Abstraction has 744 states and 1083 transitions. [2023-11-29 04:18:27,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:18:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1083 transitions. [2023-11-29 04:18:27,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2023-11-29 04:18:27,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:18:27,138 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:18:27,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 04:18:27,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:18:27,338 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:18:27,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:18:27,339 INFO L85 PathProgramCache]: Analyzing trace with hash -936173928, now seen corresponding path program 1 times [2023-11-29 04:18:27,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:18:27,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273686892] [2023-11-29 04:18:27,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:18:27,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:18:27,472 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:18:27,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492825819] [2023-11-29 04:18:27,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:18:27,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:18:27,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:18:27,474 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:18:27,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 04:18:28,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:18:28,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 1633 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:18:28,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:18:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 448 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:18:28,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:18:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 448 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:18:28,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:18:28,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273686892] [2023-11-29 04:18:28,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:18:28,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492825819] [2023-11-29 04:18:28,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492825819] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:18:28,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:18:28,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 04:18:28,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446105099] [2023-11-29 04:18:28,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:18:28,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 04:18:28,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:18:28,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 04:18:28,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-29 04:18:28,979 INFO L87 Difference]: Start difference. First operand 744 states and 1083 transitions. Second operand has 12 states, 12 states have (on average 51.833333333333336) internal successors, (622), 12 states have internal predecessors, (622), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 04:18:29,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:18:29,216 INFO L93 Difference]: Finished difference Result 1841 states and 2685 transitions. [2023-11-29 04:18:29,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:18:29,217 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 51.833333333333336) internal successors, (622), 12 states have internal predecessors, (622), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 322 [2023-11-29 04:18:29,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:18:29,230 INFO L225 Difference]: With dead ends: 1841 [2023-11-29 04:18:29,230 INFO L226 Difference]: Without dead ends: 1812 [2023-11-29 04:18:29,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 632 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-29 04:18:29,232 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 3569 mSDsluCounter, 2389 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3595 SdHoareTripleChecker+Valid, 2808 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:18:29,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3595 Valid, 2808 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:18:29,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2023-11-29 04:18:29,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1812. [2023-11-29 04:18:29,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1769 states have (on average 1.4420576596947428) internal successors, (2551), 1779 states have internal predecessors, (2551), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 04:18:29,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 2631 transitions. [2023-11-29 04:18:29,288 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 2631 transitions. Word has length 322 [2023-11-29 04:18:29,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:18:29,289 INFO L495 AbstractCegarLoop]: Abstraction has 1812 states and 2631 transitions. [2023-11-29 04:18:29,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 51.833333333333336) internal successors, (622), 12 states have internal predecessors, (622), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 04:18:29,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 2631 transitions. [2023-11-29 04:18:29,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2023-11-29 04:18:29,309 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:18:29,309 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:18:29,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 04:18:29,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:18:29,510 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:18:29,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:18:29,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1971605512, now seen corresponding path program 2 times [2023-11-29 04:18:29,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:18:29,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345285297] [2023-11-29 04:18:29,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:18:29,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:18:29,875 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:18:29,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106622247] [2023-11-29 04:18:29,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:18:29,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:18:29,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:18:29,881 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:18:29,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 04:19:00,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:19:00,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:19:00,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 3775 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 04:19:00,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:19:00,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 04:19:01,525 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:19:01,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-29 04:19:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3370 backedges. 1347 proven. 137 refuted. 0 times theorem prover too weak. 1886 trivial. 0 not checked. [2023-11-29 04:19:01,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:19:02,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:19:02,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 04:19:13,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:19:13,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345285297] [2023-11-29 04:19:13,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:19:13,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106622247] [2023-11-29 04:19:13,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106622247] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:19:13,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:19:13,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-29 04:19:13,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300160454] [2023-11-29 04:19:13,359 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 04:19:13,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 04:19:13,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:19:13,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 04:19:13,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2023-11-29 04:19:13,362 INFO L87 Difference]: Start difference. First operand 1812 states and 2631 transitions. Second operand has 15 states, 15 states have (on average 18.133333333333333) internal successors, (272), 15 states have internal predecessors, (272), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:19:19,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:19:19,608 INFO L93 Difference]: Finished difference Result 3227 states and 4679 transitions. [2023-11-29 04:19:19,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 04:19:19,608 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 18.133333333333333) internal successors, (272), 15 states have internal predecessors, (272), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 772 [2023-11-29 04:19:19,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:19:19,620 INFO L225 Difference]: With dead ends: 3227 [2023-11-29 04:19:19,620 INFO L226 Difference]: Without dead ends: 1849 [2023-11-29 04:19:19,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1484 GetRequests, 1452 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 04:19:19,624 INFO L413 NwaCegarLoop]: 732 mSDtfsCounter, 1066 mSDsluCounter, 4693 mSDsCounter, 0 mSdLazyCounter, 4019 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1074 SdHoareTripleChecker+Valid, 5425 SdHoareTripleChecker+Invalid, 4026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 4019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-11-29 04:19:19,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1074 Valid, 5425 Invalid, 4026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 4019 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-11-29 04:19:19,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2023-11-29 04:19:19,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1844. [2023-11-29 04:19:19,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1801 states have (on average 1.4369794558578568) internal successors, (2588), 1811 states have internal predecessors, (2588), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 04:19:19,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 2668 transitions. [2023-11-29 04:19:19,692 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 2668 transitions. Word has length 772 [2023-11-29 04:19:19,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:19:19,693 INFO L495 AbstractCegarLoop]: Abstraction has 1844 states and 2668 transitions. [2023-11-29 04:19:19,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 18.133333333333333) internal successors, (272), 15 states have internal predecessors, (272), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:19:19,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 2668 transitions. [2023-11-29 04:19:19,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2023-11-29 04:19:19,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:19:19,706 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:19:19,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 04:19:19,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 04:19:19,906 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:19:19,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:19:19,907 INFO L85 PathProgramCache]: Analyzing trace with hash 265691702, now seen corresponding path program 1 times [2023-11-29 04:19:19,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:19:19,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248674875] [2023-11-29 04:19:19,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:19:19,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:19:20,214 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:19:20,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203465867] [2023-11-29 04:19:20,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:19:20,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:19:20,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:19:20,215 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:19:20,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 04:19:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:19:21,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 3773 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 04:19:21,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:19:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3370 backedges. 1336 proven. 0 refuted. 0 times theorem prover too weak. 2034 trivial. 0 not checked. [2023-11-29 04:19:21,511 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:19:21,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:19:21,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248674875] [2023-11-29 04:19:21,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:19:21,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203465867] [2023-11-29 04:19:21,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203465867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:19:21,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:19:21,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:19:21,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181249309] [2023-11-29 04:19:21,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:19:21,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:19:21,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:19:21,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:19:21,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:19:21,514 INFO L87 Difference]: Start difference. First operand 1844 states and 2668 transitions. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:19:21,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:19:21,592 INFO L93 Difference]: Finished difference Result 3199 states and 4541 transitions. [2023-11-29 04:19:21,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:19:21,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 772 [2023-11-29 04:19:21,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:19:21,600 INFO L225 Difference]: With dead ends: 3199 [2023-11-29 04:19:21,600 INFO L226 Difference]: Without dead ends: 1362 [2023-11-29 04:19:21,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 769 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:19:21,604 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 78 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:19:21,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 562 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:19:21,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2023-11-29 04:19:21,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1362. [2023-11-29 04:19:21,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1319 states have (on average 1.3495072024260804) internal successors, (1780), 1329 states have internal predecessors, (1780), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 04:19:21,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1860 transitions. [2023-11-29 04:19:21,641 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1860 transitions. Word has length 772 [2023-11-29 04:19:21,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:19:21,642 INFO L495 AbstractCegarLoop]: Abstraction has 1362 states and 1860 transitions. [2023-11-29 04:19:21,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:19:21,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1860 transitions. [2023-11-29 04:19:21,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2023-11-29 04:19:21,649 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:19:21,650 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:19:21,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 04:19:21,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 04:19:21,850 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:19:21,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:19:21,851 INFO L85 PathProgramCache]: Analyzing trace with hash -88405742, now seen corresponding path program 1 times [2023-11-29 04:19:21,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:19:21,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819033894] [2023-11-29 04:19:21,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:19:21,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:19:22,164 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:19:22,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347139039] [2023-11-29 04:19:22,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:19:22,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:19:22,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:19:22,166 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:19:22,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 04:19:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:19:41,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 3776 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 04:19:41,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:19:41,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 04:19:41,785 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:19:41,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-29 04:19:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3370 backedges. 1661 proven. 317 refuted. 0 times theorem prover too weak. 1392 trivial. 0 not checked. [2023-11-29 04:19:41,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:19:42,637 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:19:42,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 04:19:53,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:19:53,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819033894] [2023-11-29 04:19:53,406 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:19:53,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347139039] [2023-11-29 04:19:53,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347139039] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:19:53,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:19:53,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-11-29 04:19:53,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098380709] [2023-11-29 04:19:53,407 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 04:19:53,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 04:19:53,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:19:53,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 04:19:53,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2023-11-29 04:19:53,419 INFO L87 Difference]: Start difference. First operand 1362 states and 1860 transitions. Second operand has 16 states, 16 states have (on average 21.75) internal successors, (348), 16 states have internal predecessors, (348), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:20:00,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:20:00,440 INFO L93 Difference]: Finished difference Result 2292 states and 3143 transitions. [2023-11-29 04:20:00,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 04:20:00,441 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.75) internal successors, (348), 16 states have internal predecessors, (348), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 773 [2023-11-29 04:20:00,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:20:00,449 INFO L225 Difference]: With dead ends: 2292 [2023-11-29 04:20:00,449 INFO L226 Difference]: Without dead ends: 1362 [2023-11-29 04:20:00,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1486 GetRequests, 1452 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=238, Invalid=1022, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 04:20:00,452 INFO L413 NwaCegarLoop]: 731 mSDtfsCounter, 633 mSDsluCounter, 6532 mSDsCounter, 0 mSdLazyCounter, 3737 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 7263 SdHoareTripleChecker+Invalid, 3742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 3737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-11-29 04:20:00,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 7263 Invalid, 3742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 3737 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-11-29 04:20:00,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2023-11-29 04:20:00,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1362. [2023-11-29 04:20:00,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1319 states have (on average 1.3487490523123578) internal successors, (1779), 1329 states have internal predecessors, (1779), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 04:20:00,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1859 transitions. [2023-11-29 04:20:00,501 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1859 transitions. Word has length 773 [2023-11-29 04:20:00,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:20:00,502 INFO L495 AbstractCegarLoop]: Abstraction has 1362 states and 1859 transitions. [2023-11-29 04:20:00,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 21.75) internal successors, (348), 16 states have internal predecessors, (348), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:20:00,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1859 transitions. [2023-11-29 04:20:00,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2023-11-29 04:20:00,512 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:20:00,513 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:00,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-29 04:20:00,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 04:20:00,714 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:20:00,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:00,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1357164358, now seen corresponding path program 2 times [2023-11-29 04:20:00,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:00,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573926624] [2023-11-29 04:20:00,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:00,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:00,992 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:20:00,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601965131] [2023-11-29 04:20:00,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:20:00,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:20:00,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:20:00,993 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:20:00,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 04:20:19,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:20:19,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:20:19,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 3777 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 04:20:19,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:20:19,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 04:20:20,401 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:20:20,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-29 04:20:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 883 proven. 32 refuted. 0 times theorem prover too weak. 2456 trivial. 0 not checked. [2023-11-29 04:20:20,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:20:21,176 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:20:21,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 04:20:22,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:22,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573926624] [2023-11-29 04:20:22,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:20:22,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601965131] [2023-11-29 04:20:22,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601965131] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:20:22,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:20:22,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-29 04:20:22,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728985103] [2023-11-29 04:20:22,973 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 04:20:22,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 04:20:22,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:22,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 04:20:22,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2023-11-29 04:20:22,975 INFO L87 Difference]: Start difference. First operand 1362 states and 1859 transitions. Second operand has 14 states, 14 states have (on average 14.214285714285714) internal successors, (199), 14 states have internal predecessors, (199), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:20:25,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 04:20:28,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:20:28,678 INFO L93 Difference]: Finished difference Result 2558 states and 3502 transitions. [2023-11-29 04:20:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 04:20:28,678 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.214285714285714) internal successors, (199), 14 states have internal predecessors, (199), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 774 [2023-11-29 04:20:28,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:20:28,686 INFO L225 Difference]: With dead ends: 2558 [2023-11-29 04:20:28,686 INFO L226 Difference]: Without dead ends: 1362 [2023-11-29 04:20:28,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1488 GetRequests, 1458 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2023-11-29 04:20:28,689 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 606 mSDsluCounter, 2482 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 2858 SdHoareTripleChecker+Invalid, 1926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:20:28,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 2858 Invalid, 1926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-11-29 04:20:28,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2023-11-29 04:20:28,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1362. [2023-11-29 04:20:28,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1319 states have (on average 1.3479909021986354) internal successors, (1778), 1329 states have internal predecessors, (1778), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 04:20:28,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1858 transitions. [2023-11-29 04:20:28,757 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1858 transitions. Word has length 774 [2023-11-29 04:20:28,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:20:28,757 INFO L495 AbstractCegarLoop]: Abstraction has 1362 states and 1858 transitions. [2023-11-29 04:20:28,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.214285714285714) internal successors, (199), 14 states have internal predecessors, (199), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:20:28,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1858 transitions. [2023-11-29 04:20:28,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2023-11-29 04:20:28,767 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:20:28,767 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:28,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 04:20:28,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 04:20:28,968 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:20:28,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:28,969 INFO L85 PathProgramCache]: Analyzing trace with hash -308890218, now seen corresponding path program 3 times [2023-11-29 04:20:28,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:28,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552226054] [2023-11-29 04:20:28,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:28,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:29,227 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:20:29,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813285099] [2023-11-29 04:20:29,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:20:29,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:20:29,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:20:29,229 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:20:29,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 04:20:30,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:20:30,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:20:30,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 04:20:30,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:20:30,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3373 backedges. 629 proven. 0 refuted. 0 times theorem prover too weak. 2744 trivial. 0 not checked. [2023-11-29 04:20:30,966 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:20:30,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:30,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552226054] [2023-11-29 04:20:30,966 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:20:30,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813285099] [2023-11-29 04:20:30,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813285099] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:20:30,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:20:30,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 04:20:30,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785011022] [2023-11-29 04:20:30,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:20:30,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 04:20:30,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:30,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 04:20:30,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 04:20:30,969 INFO L87 Difference]: Start difference. First operand 1362 states and 1858 transitions. Second operand has 6 states, 6 states have (on average 27.5) internal successors, (165), 6 states have internal predecessors, (165), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:20:31,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:20:31,162 INFO L93 Difference]: Finished difference Result 2724 states and 3734 transitions. [2023-11-29 04:20:31,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:20:31,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.5) internal successors, (165), 6 states have internal predecessors, (165), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 775 [2023-11-29 04:20:31,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:20:31,168 INFO L225 Difference]: With dead ends: 2724 [2023-11-29 04:20:31,168 INFO L226 Difference]: Without dead ends: 1397 [2023-11-29 04:20:31,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 770 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 04:20:31,172 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 8 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:20:31,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 729 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:20:31,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2023-11-29 04:20:31,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1390. [2023-11-29 04:20:31,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1347 states have (on average 1.3385300668151447) internal successors, (1803), 1357 states have internal predecessors, (1803), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 04:20:31,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 1883 transitions. [2023-11-29 04:20:31,221 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 1883 transitions. Word has length 775 [2023-11-29 04:20:31,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:20:31,221 INFO L495 AbstractCegarLoop]: Abstraction has 1390 states and 1883 transitions. [2023-11-29 04:20:31,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.5) internal successors, (165), 6 states have internal predecessors, (165), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:20:31,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 1883 transitions. [2023-11-29 04:20:31,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2023-11-29 04:20:31,231 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:20:31,232 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:31,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 04:20:31,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 04:20:31,433 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:20:31,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:31,433 INFO L85 PathProgramCache]: Analyzing trace with hash -543786932, now seen corresponding path program 1 times [2023-11-29 04:20:31,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:31,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278269819] [2023-11-29 04:20:31,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:31,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:31,738 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:20:31,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117119947] [2023-11-29 04:20:31,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:31,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:20:31,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:20:31,740 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:20:31,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 04:20:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:46,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 3788 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 04:20:46,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:20:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3397 backedges. 331 proven. 0 refuted. 0 times theorem prover too weak. 3066 trivial. 0 not checked. [2023-11-29 04:20:46,672 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:20:46,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:46,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278269819] [2023-11-29 04:20:46,672 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:20:46,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117119947] [2023-11-29 04:20:46,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117119947] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:20:46,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:20:46,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:20:46,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936481821] [2023-11-29 04:20:46,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:20:46,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:20:46,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:46,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:20:46,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:20:46,675 INFO L87 Difference]: Start difference. First operand 1390 states and 1883 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:20:47,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:20:47,099 INFO L93 Difference]: Finished difference Result 2783 states and 3790 transitions. [2023-11-29 04:20:47,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:20:47,100 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 785 [2023-11-29 04:20:47,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:20:47,106 INFO L225 Difference]: With dead ends: 2783 [2023-11-29 04:20:47,106 INFO L226 Difference]: Without dead ends: 1440 [2023-11-29 04:20:47,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 779 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:20:47,108 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 13 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:20:47,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1000 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:20:47,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2023-11-29 04:20:47,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1430. [2023-11-29 04:20:47,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1430 states, 1387 states have (on average 1.3359769286229273) internal successors, (1853), 1397 states have internal predecessors, (1853), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 04:20:47,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1430 states to 1430 states and 1933 transitions. [2023-11-29 04:20:47,140 INFO L78 Accepts]: Start accepts. Automaton has 1430 states and 1933 transitions. Word has length 785 [2023-11-29 04:20:47,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:20:47,140 INFO L495 AbstractCegarLoop]: Abstraction has 1430 states and 1933 transitions. [2023-11-29 04:20:47,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:20:47,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1430 states and 1933 transitions. [2023-11-29 04:20:47,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2023-11-29 04:20:47,148 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:20:47,149 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:47,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 04:20:47,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 04:20:47,350 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:20:47,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:47,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1915565544, now seen corresponding path program 1 times [2023-11-29 04:20:47,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:47,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598740456] [2023-11-29 04:20:47,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:47,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:47,674 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:20:47,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873981882] [2023-11-29 04:20:47,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:47,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:20:47,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:20:47,675 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:20:47,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 04:21:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:21:03,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 3795 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 04:21:03,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:21:03,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3418 backedges. 1431 proven. 0 refuted. 0 times theorem prover too weak. 1987 trivial. 0 not checked. [2023-11-29 04:21:03,919 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:21:03,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:21:03,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598740456] [2023-11-29 04:21:03,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:21:03,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873981882] [2023-11-29 04:21:03,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873981882] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:21:03,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:21:03,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 04:21:03,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523655776] [2023-11-29 04:21:03,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:21:03,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 04:21:03,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:21:03,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 04:21:03,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 04:21:03,923 INFO L87 Difference]: Start difference. First operand 1430 states and 1933 transitions. Second operand has 6 states, 6 states have (on average 35.5) internal successors, (213), 6 states have internal predecessors, (213), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:21:04,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:21:04,151 INFO L93 Difference]: Finished difference Result 2873 states and 3902 transitions. [2023-11-29 04:21:04,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:21:04,152 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 35.5) internal successors, (213), 6 states have internal predecessors, (213), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 792 [2023-11-29 04:21:04,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:21:04,159 INFO L225 Difference]: With dead ends: 2873 [2023-11-29 04:21:04,159 INFO L226 Difference]: Without dead ends: 1490 [2023-11-29 04:21:04,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 791 GetRequests, 787 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 04:21:04,162 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 6 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:21:04,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 736 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:21:04,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2023-11-29 04:21:04,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1442. [2023-11-29 04:21:04,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1399 states have (on average 1.335239456754825) internal successors, (1868), 1409 states have internal predecessors, (1868), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 04:21:04,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 1948 transitions. [2023-11-29 04:21:04,208 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 1948 transitions. Word has length 792 [2023-11-29 04:21:04,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:21:04,209 INFO L495 AbstractCegarLoop]: Abstraction has 1442 states and 1948 transitions. [2023-11-29 04:21:04,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 35.5) internal successors, (213), 6 states have internal predecessors, (213), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:21:04,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 1948 transitions. [2023-11-29 04:21:04,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2023-11-29 04:21:04,220 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:21:04,221 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:21:04,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 04:21:04,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 04:21:04,422 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:21:04,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:21:04,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1176480102, now seen corresponding path program 1 times [2023-11-29 04:21:04,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:21:04,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127881569] [2023-11-29 04:21:04,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:21:04,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:21:04,758 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:21:04,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080118289] [2023-11-29 04:21:04,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:21:04,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:21:04,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:21:04,759 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:21:04,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 04:21:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:21:15,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 3789 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 04:21:15,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:21:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3418 backedges. 355 proven. 0 refuted. 0 times theorem prover too weak. 3063 trivial. 0 not checked. [2023-11-29 04:21:15,745 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:21:15,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:21:15,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127881569] [2023-11-29 04:21:15,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:21:15,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080118289] [2023-11-29 04:21:15,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080118289] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:21:15,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:21:15,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:21:15,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651725336] [2023-11-29 04:21:15,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:21:15,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:21:15,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:21:15,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:21:15,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:21:15,747 INFO L87 Difference]: Start difference. First operand 1442 states and 1948 transitions. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:21:16,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:21:16,148 INFO L93 Difference]: Finished difference Result 2886 states and 3915 transitions. [2023-11-29 04:21:16,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:21:16,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 792 [2023-11-29 04:21:16,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:21:16,155 INFO L225 Difference]: With dead ends: 2886 [2023-11-29 04:21:16,155 INFO L226 Difference]: Without dead ends: 1499 [2023-11-29 04:21:16,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 786 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 04:21:16,158 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 37 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:21:16,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1012 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:21:16,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2023-11-29 04:21:16,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 1462. [2023-11-29 04:21:16,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1419 states have (on average 1.3305144467935166) internal successors, (1888), 1429 states have internal predecessors, (1888), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 04:21:16,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 1968 transitions. [2023-11-29 04:21:16,202 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 1968 transitions. Word has length 792 [2023-11-29 04:21:16,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:21:16,203 INFO L495 AbstractCegarLoop]: Abstraction has 1462 states and 1968 transitions. [2023-11-29 04:21:16,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:21:16,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 1968 transitions. [2023-11-29 04:21:16,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2023-11-29 04:21:16,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:21:16,211 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 7, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:21:16,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 04:21:16,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 04:21:16,412 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:21:16,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:21:16,412 INFO L85 PathProgramCache]: Analyzing trace with hash -32113718, now seen corresponding path program 1 times [2023-11-29 04:21:16,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:21:16,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123691715] [2023-11-29 04:21:16,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:21:16,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:21:16,695 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:21:16,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634691154] [2023-11-29 04:21:16,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:21:16,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:21:16,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:21:16,697 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:21:16,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 04:21:31,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:21:31,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 3775 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 04:21:32,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:21:32,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 04:21:32,757 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:21:32,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-29 04:21:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3418 backedges. 1837 proven. 578 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2023-11-29 04:21:32,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:21:33,498 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:21:33,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 04:21:50,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:21:50,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123691715] [2023-11-29 04:21:50,217 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:21:50,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634691154] [2023-11-29 04:21:50,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634691154] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:21:50,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:21:50,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-11-29 04:21:50,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020121557] [2023-11-29 04:21:50,218 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 04:21:50,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 04:21:50,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:21:50,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 04:21:50,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2023-11-29 04:21:50,221 INFO L87 Difference]: Start difference. First operand 1462 states and 1968 transitions. Second operand has 17 states, 17 states have (on average 25.41176470588235) internal successors, (432), 17 states have internal predecessors, (432), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:21:57,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 04:21:59,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:21:59,252 INFO L93 Difference]: Finished difference Result 2315 states and 3130 transitions. [2023-11-29 04:21:59,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 04:21:59,253 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 25.41176470588235) internal successors, (432), 17 states have internal predecessors, (432), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 792 [2023-11-29 04:21:59,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:21:59,260 INFO L225 Difference]: With dead ends: 2315 [2023-11-29 04:21:59,260 INFO L226 Difference]: Without dead ends: 1462 [2023-11-29 04:21:59,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1522 GetRequests, 1486 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 04:21:59,262 INFO L413 NwaCegarLoop]: 903 mSDtfsCounter, 978 mSDsluCounter, 7631 mSDsCounter, 0 mSdLazyCounter, 4266 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 8534 SdHoareTripleChecker+Invalid, 4275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 4266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2023-11-29 04:21:59,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [992 Valid, 8534 Invalid, 4275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 4266 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2023-11-29 04:21:59,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2023-11-29 04:21:59,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1462. [2023-11-29 04:21:59,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1419 states have (on average 1.3298097251585623) internal successors, (1887), 1429 states have internal predecessors, (1887), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 04:21:59,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 1967 transitions. [2023-11-29 04:21:59,296 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 1967 transitions. Word has length 792 [2023-11-29 04:21:59,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:21:59,297 INFO L495 AbstractCegarLoop]: Abstraction has 1462 states and 1967 transitions. [2023-11-29 04:21:59,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 25.41176470588235) internal successors, (432), 17 states have internal predecessors, (432), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:21:59,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 1967 transitions. [2023-11-29 04:21:59,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2023-11-29 04:21:59,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:21:59,306 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 6, 6, 6, 6, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:21:59,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 04:21:59,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 04:21:59,507 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:21:59,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:21:59,508 INFO L85 PathProgramCache]: Analyzing trace with hash 492693674, now seen corresponding path program 2 times [2023-11-29 04:21:59,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:21:59,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800070160] [2023-11-29 04:21:59,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:21:59,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:21:59,859 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:21:59,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048283721] [2023-11-29 04:21:59,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:21:59,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:21:59,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:21:59,861 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:21:59,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 04:22:23,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:22:23,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:22:23,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 3775 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 04:22:23,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:22:23,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 04:22:24,310 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:22:24,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-29 04:22:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3412 backedges. 1719 proven. 1321 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2023-11-29 04:22:24,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:22:25,100 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:22:25,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 04:22:50,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:22:50,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800070160] [2023-11-29 04:22:50,122 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:22:50,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048283721] [2023-11-29 04:22:50,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048283721] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:22:50,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:22:50,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-11-29 04:22:50,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196832734] [2023-11-29 04:22:50,123 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 04:22:50,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 04:22:50,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:22:50,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 04:22:50,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 04:22:50,126 INFO L87 Difference]: Start difference. First operand 1462 states and 1967 transitions. Second operand has 20 states, 20 states have (on average 29.3) internal successors, (586), 20 states have internal predecessors, (586), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:23:04,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:23:04,776 INFO L93 Difference]: Finished difference Result 2029 states and 2745 transitions. [2023-11-29 04:23:04,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 04:23:04,777 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 29.3) internal successors, (586), 20 states have internal predecessors, (586), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 792 [2023-11-29 04:23:04,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:23:04,784 INFO L225 Difference]: With dead ends: 2029 [2023-11-29 04:23:04,784 INFO L226 Difference]: Without dead ends: 1462 [2023-11-29 04:23:04,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1522 GetRequests, 1481 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 04:23:04,786 INFO L413 NwaCegarLoop]: 1187 mSDtfsCounter, 1168 mSDsluCounter, 13106 mSDsCounter, 0 mSdLazyCounter, 6363 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 14293 SdHoareTripleChecker+Invalid, 6372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 6363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:23:04,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1188 Valid, 14293 Invalid, 6372 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9 Valid, 6363 Invalid, 0 Unknown, 0 Unchecked, 14.1s Time] [2023-11-29 04:23:04,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2023-11-29 04:23:04,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1462. [2023-11-29 04:23:04,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1419 states have (on average 1.3291050035236083) internal successors, (1886), 1429 states have internal predecessors, (1886), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 04:23:04,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 1966 transitions. [2023-11-29 04:23:04,830 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 1966 transitions. Word has length 792 [2023-11-29 04:23:04,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:23:04,830 INFO L495 AbstractCegarLoop]: Abstraction has 1462 states and 1966 transitions. [2023-11-29 04:23:04,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 29.3) internal successors, (586), 20 states have internal predecessors, (586), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:23:04,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 1966 transitions. [2023-11-29 04:23:04,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2023-11-29 04:23:04,841 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:23:04,842 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:23:04,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 04:23:05,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 04:23:05,043 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:23:05,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:23:05,044 INFO L85 PathProgramCache]: Analyzing trace with hash -504222326, now seen corresponding path program 3 times [2023-11-29 04:23:05,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:23:05,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916279199] [2023-11-29 04:23:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:23:05,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:23:05,345 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:23:05,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163824324] [2023-11-29 04:23:05,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:23:05,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:23:05,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:23:05,346 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:23:05,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 04:23:09,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:23:09,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:23:09,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 04:23:09,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:23:09,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3410 backedges. 637 proven. 0 refuted. 0 times theorem prover too weak. 2773 trivial. 0 not checked. [2023-11-29 04:23:09,985 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:23:09,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:23:09,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916279199] [2023-11-29 04:23:09,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:23:09,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163824324] [2023-11-29 04:23:09,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163824324] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:23:09,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:23:09,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 04:23:09,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906890162] [2023-11-29 04:23:09,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:23:09,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 04:23:09,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:23:09,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 04:23:09,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:23:09,989 INFO L87 Difference]: Start difference. First operand 1462 states and 1966 transitions. Second operand has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:23:10,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:23:10,788 INFO L93 Difference]: Finished difference Result 2952 states and 3986 transitions. [2023-11-29 04:23:10,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 04:23:10,789 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 792 [2023-11-29 04:23:10,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:23:10,795 INFO L225 Difference]: With dead ends: 2952 [2023-11-29 04:23:10,795 INFO L226 Difference]: Without dead ends: 1537 [2023-11-29 04:23:10,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 784 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-29 04:23:10,797 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 20 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 04:23:10,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1210 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 04:23:10,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2023-11-29 04:23:10,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1512. [2023-11-29 04:23:10,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1469 states have (on average 1.3213070115724983) internal successors, (1941), 1479 states have internal predecessors, (1941), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 04:23:10,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 2021 transitions. [2023-11-29 04:23:10,830 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 2021 transitions. Word has length 792 [2023-11-29 04:23:10,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:23:10,831 INFO L495 AbstractCegarLoop]: Abstraction has 1512 states and 2021 transitions. [2023-11-29 04:23:10,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:23:10,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 2021 transitions. [2023-11-29 04:23:10,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2023-11-29 04:23:10,854 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:23:10,855 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:23:10,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 04:23:11,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 04:23:11,056 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:23:11,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:23:11,056 INFO L85 PathProgramCache]: Analyzing trace with hash -2144442646, now seen corresponding path program 1 times [2023-11-29 04:23:11,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:23:11,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331015228] [2023-11-29 04:23:11,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:23:11,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:23:11,390 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:23:11,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1961924422] [2023-11-29 04:23:11,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:23:11,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:23:11,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:23:11,392 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:23:11,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 04:24:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:24:41,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 3775 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 04:24:41,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:24:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3460 backedges. 1227 proven. 14 refuted. 0 times theorem prover too weak. 2219 trivial. 0 not checked. [2023-11-29 04:24:41,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:24:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3460 backedges. 1227 proven. 0 refuted. 0 times theorem prover too weak. 2233 trivial. 0 not checked. [2023-11-29 04:24:44,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:24:44,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331015228] [2023-11-29 04:24:44,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:24:44,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961924422] [2023-11-29 04:24:44,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961924422] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 04:24:44,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:24:44,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-11-29 04:24:44,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128918132] [2023-11-29 04:24:44,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:24:44,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:24:44,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:24:44,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:24:44,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-29 04:24:44,672 INFO L87 Difference]: Start difference. First operand 1512 states and 2021 transitions. Second operand has 7 states, 7 states have (on average 29.285714285714285) internal successors, (205), 7 states have internal predecessors, (205), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:24:55,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:25:00,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:25:04,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 04:25:08,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 04:25:12,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 04:25:17,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:25:20,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 04:25:24,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 04:25:29,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 04:25:33,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 04:25:35,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 04:25:40,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 04:25:45,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 04:25:49,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 04:25:54,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 04:25:54,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:25:54,881 INFO L93 Difference]: Finished difference Result 3601 states and 4838 transitions. [2023-11-29 04:25:54,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 04:25:54,882 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 29.285714285714285) internal successors, (205), 7 states have internal predecessors, (205), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 792 [2023-11-29 04:25:54,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:25:54,891 INFO L225 Difference]: With dead ends: 3601 [2023-11-29 04:25:54,891 INFO L226 Difference]: Without dead ends: 2152 [2023-11-29 04:25:54,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1589 GetRequests, 1573 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:25:54,893 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 126 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 17 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.9s IncrementalHoareTripleChecker+Time [2023-11-29 04:25:54,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 1255 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 450 Invalid, 12 Unknown, 0 Unchecked, 64.9s Time] [2023-11-29 04:25:54,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2023-11-29 04:25:54,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 1532. [2023-11-29 04:25:54,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1489 states have (on average 1.3169912693082606) internal successors, (1961), 1499 states have internal predecessors, (1961), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 04:25:54,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 2041 transitions. [2023-11-29 04:25:54,960 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 2041 transitions. Word has length 792 [2023-11-29 04:25:54,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:25:54,960 INFO L495 AbstractCegarLoop]: Abstraction has 1532 states and 2041 transitions. [2023-11-29 04:25:54,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 29.285714285714285) internal successors, (205), 7 states have internal predecessors, (205), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:25:54,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 2041 transitions. [2023-11-29 04:25:54,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2023-11-29 04:25:54,969 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:25:54,970 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:25:55,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 04:25:55,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 04:25:55,171 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:25:55,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:25:55,172 INFO L85 PathProgramCache]: Analyzing trace with hash -29057670, now seen corresponding path program 1 times [2023-11-29 04:25:55,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:25:55,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225911520] [2023-11-29 04:25:55,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:55,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:25:55,501 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:25:55,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123506277] [2023-11-29 04:25:55,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:55,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:25:55,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:25:55,502 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:25:55,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 04:26:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:26:12,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 3785 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 04:26:12,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:26:12,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 04:26:13,328 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:26:13,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 26 [2023-11-29 04:26:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3500 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 3211 trivial. 0 not checked. [2023-11-29 04:26:13,464 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:26:13,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:26:13,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225911520] [2023-11-29 04:26:13,464 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:26:13,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123506277] [2023-11-29 04:26:13,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123506277] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:26:13,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:26:13,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 04:26:13,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114095878] [2023-11-29 04:26:13,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:26:13,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 04:26:13,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:26:13,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 04:26:13,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-29 04:26:13,467 INFO L87 Difference]: Start difference. First operand 1532 states and 2041 transitions. Second operand has 12 states, 12 states have (on average 11.083333333333334) internal successors, (133), 11 states have internal predecessors, (133), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:26:14,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:26:14,837 INFO L93 Difference]: Finished difference Result 3003 states and 4012 transitions. [2023-11-29 04:26:14,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 04:26:14,838 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 11.083333333333334) internal successors, (133), 11 states have internal predecessors, (133), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 812 [2023-11-29 04:26:14,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:26:14,843 INFO L225 Difference]: With dead ends: 3003 [2023-11-29 04:26:14,843 INFO L226 Difference]: Without dead ends: 1522 [2023-11-29 04:26:14,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 801 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-11-29 04:26:14,845 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 431 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:26:14,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 1474 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 04:26:14,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2023-11-29 04:26:14,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1522. [2023-11-29 04:26:14,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1479 states have (on average 1.3177822853279242) internal successors, (1949), 1489 states have internal predecessors, (1949), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 04:26:14,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 2029 transitions. [2023-11-29 04:26:14,888 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 2029 transitions. Word has length 812 [2023-11-29 04:26:14,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:26:14,888 INFO L495 AbstractCegarLoop]: Abstraction has 1522 states and 2029 transitions. [2023-11-29 04:26:14,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.083333333333334) internal successors, (133), 11 states have internal predecessors, (133), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:26:14,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 2029 transitions. [2023-11-29 04:26:14,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2023-11-29 04:26:14,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:26:14,896 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 6, 6, 6, 6, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:26:14,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 04:26:15,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:26:15,097 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:26:15,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:26:15,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1969946468, now seen corresponding path program 2 times [2023-11-29 04:26:15,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:26:15,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849765895] [2023-11-29 04:26:15,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:26:15,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:26:15,406 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:26:15,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579677291] [2023-11-29 04:26:15,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:26:15,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:26:15,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:26:15,408 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:26:15,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 04:26:48,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:26:48,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:26:49,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 3787 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 04:26:49,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:26:49,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 04:26:50,133 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:26:50,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-29 04:26:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3502 backedges. 1465 proven. 1859 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2023-11-29 04:26:50,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:26:51,011 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:26:51,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 04:27:20,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:27:20,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849765895] [2023-11-29 04:27:20,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:27:20,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579677291] [2023-11-29 04:27:20,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579677291] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:27:20,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:27:20,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-11-29 04:27:20,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14065909] [2023-11-29 04:27:20,922 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 04:27:20,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 04:27:20,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:27:20,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 04:27:20,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 04:27:20,925 INFO L87 Difference]: Start difference. First operand 1522 states and 2029 transitions. Second operand has 19 states, 19 states have (on average 35.73684210526316) internal successors, (679), 19 states have internal predecessors, (679), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:27:33,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 04:27:36,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:27:36,871 INFO L93 Difference]: Finished difference Result 1960 states and 2628 transitions. [2023-11-29 04:27:36,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 04:27:36,872 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 35.73684210526316) internal successors, (679), 19 states have internal predecessors, (679), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 812 [2023-11-29 04:27:36,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:27:36,878 INFO L225 Difference]: With dead ends: 1960 [2023-11-29 04:27:36,878 INFO L226 Difference]: Without dead ends: 1512 [2023-11-29 04:27:36,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1560 GetRequests, 1519 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=331, Invalid=1475, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 04:27:36,880 INFO L413 NwaCegarLoop]: 1418 mSDtfsCounter, 917 mSDsluCounter, 16969 mSDsCounter, 0 mSdLazyCounter, 6678 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 18387 SdHoareTripleChecker+Invalid, 6683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:27:36,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [938 Valid, 18387 Invalid, 6683 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5 Valid, 6678 Invalid, 0 Unknown, 0 Unchecked, 15.3s Time] [2023-11-29 04:27:36,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2023-11-29 04:27:36,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 1512. [2023-11-29 04:27:36,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1469 states have (on average 1.3185840707964602) internal successors, (1937), 1479 states have internal predecessors, (1937), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 04:27:36,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 2017 transitions. [2023-11-29 04:27:36,922 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 2017 transitions. Word has length 812 [2023-11-29 04:27:36,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:27:36,922 INFO L495 AbstractCegarLoop]: Abstraction has 1512 states and 2017 transitions. [2023-11-29 04:27:36,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 35.73684210526316) internal successors, (679), 19 states have internal predecessors, (679), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:27:36,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 2017 transitions. [2023-11-29 04:27:36,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2023-11-29 04:27:36,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:27:36,935 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 7, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:27:37,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 04:27:37,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:37,136 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:27:37,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:27:37,136 INFO L85 PathProgramCache]: Analyzing trace with hash 392950078, now seen corresponding path program 3 times [2023-11-29 04:27:37,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:27:37,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955978745] [2023-11-29 04:27:37,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:37,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:27:37,376 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:27:37,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348616734] [2023-11-29 04:27:37,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:27:37,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:37,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:27:37,378 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:27:37,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 04:28:28,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:28:28,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:28:28,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 04:28:28,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:28:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3508 backedges. 651 proven. 0 refuted. 0 times theorem prover too weak. 2857 trivial. 0 not checked. [2023-11-29 04:28:28,448 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:28:28,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:28:28,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955978745] [2023-11-29 04:28:28,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:28:28,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348616734] [2023-11-29 04:28:28,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348616734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:28:28,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:28:28,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 04:28:28,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583153649] [2023-11-29 04:28:28,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:28:28,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:28:28,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:28:28,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:28:28,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:28:28,450 INFO L87 Difference]: Start difference. First operand 1512 states and 2017 transitions. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:28:28,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:28:28,815 INFO L93 Difference]: Finished difference Result 2240 states and 3006 transitions. [2023-11-29 04:28:28,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:28:28,816 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 812 [2023-11-29 04:28:28,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:28:28,823 INFO L225 Difference]: With dead ends: 2240 [2023-11-29 04:28:28,823 INFO L226 Difference]: Without dead ends: 1512 [2023-11-29 04:28:28,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 805 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:28:28,825 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 9 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:28:28,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1045 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:28:28,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2023-11-29 04:28:28,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 1494. [2023-11-29 04:28:28,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1451 states have (on average 1.3204686423156444) internal successors, (1916), 1461 states have internal predecessors, (1916), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 04:28:28,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1996 transitions. [2023-11-29 04:28:28,879 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1996 transitions. Word has length 812 [2023-11-29 04:28:28,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:28:28,879 INFO L495 AbstractCegarLoop]: Abstraction has 1494 states and 1996 transitions. [2023-11-29 04:28:28,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:28:28,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1996 transitions. [2023-11-29 04:28:28,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2023-11-29 04:28:28,887 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:28:28,888 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:28:28,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-29 04:28:29,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:29,088 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:28:29,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:28:29,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1374696966, now seen corresponding path program 1 times [2023-11-29 04:28:29,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:28:29,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566317442] [2023-11-29 04:28:29,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:29,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:28:29,383 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:28:29,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044560278] [2023-11-29 04:28:29,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:29,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:29,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:28:29,385 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:28:29,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 04:28:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:44,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 3795 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-29 04:28:44,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:28:45,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 04:28:45,640 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:28:45,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-29 04:28:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3508 backedges. 1017 proven. 2440 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-29 04:28:45,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:28:46,510 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:28:46,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 04:29:26,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:29:26,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566317442] [2023-11-29 04:29:26,900 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:29:26,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044560278] [2023-11-29 04:29:26,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044560278] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:29:26,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:29:26,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-11-29 04:29:26,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477411304] [2023-11-29 04:29:26,901 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 04:29:26,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 04:29:26,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:29:26,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 04:29:26,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1263, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 04:29:26,905 INFO L87 Difference]: Start difference. First operand 1494 states and 1996 transitions. Second operand has 22 states, 22 states have (on average 34.45454545454545) internal successors, (758), 22 states have internal predecessors, (758), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:29:29,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 04:29:41,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 04:29:42,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 04:29:46,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 04:29:47,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 04:29:51,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:29:51,996 INFO L93 Difference]: Finished difference Result 1773 states and 2384 transitions. [2023-11-29 04:29:51,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 04:29:51,997 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 34.45454545454545) internal successors, (758), 22 states have internal predecessors, (758), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 812 [2023-11-29 04:29:51,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:29:52,000 INFO L225 Difference]: With dead ends: 1773 [2023-11-29 04:29:52,001 INFO L226 Difference]: Without dead ends: 1490 [2023-11-29 04:29:52,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1560 GetRequests, 1515 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=385, Invalid=1777, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 04:29:52,002 INFO L413 NwaCegarLoop]: 1538 mSDtfsCounter, 1426 mSDsluCounter, 19937 mSDsCounter, 0 mSdLazyCounter, 8223 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1452 SdHoareTripleChecker+Valid, 21475 SdHoareTripleChecker+Invalid, 8234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 8223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:29:52,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1452 Valid, 21475 Invalid, 8234 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11 Valid, 8223 Invalid, 0 Unknown, 0 Unchecked, 24.4s Time] [2023-11-29 04:29:52,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2023-11-29 04:29:52,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1490. [2023-11-29 04:29:52,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1447 states have (on average 1.3206634416033172) internal successors, (1911), 1457 states have internal predecessors, (1911), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 04:29:52,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 1991 transitions. [2023-11-29 04:29:52,059 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 1991 transitions. Word has length 812 [2023-11-29 04:29:52,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:29:52,060 INFO L495 AbstractCegarLoop]: Abstraction has 1490 states and 1991 transitions. [2023-11-29 04:29:52,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 34.45454545454545) internal successors, (758), 22 states have internal predecessors, (758), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:29:52,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 1991 transitions. [2023-11-29 04:29:52,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2023-11-29 04:29:52,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:29:52,068 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:29:52,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 04:29:52,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:29:52,269 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:29:52,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:29:52,269 INFO L85 PathProgramCache]: Analyzing trace with hash -526036140, now seen corresponding path program 2 times [2023-11-29 04:29:52,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:29:52,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174036413] [2023-11-29 04:29:52,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:29:52,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:29:52,585 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:29:52,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101884107] [2023-11-29 04:29:52,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:29:52,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:29:52,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:29:52,586 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:29:52,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 04:31:00,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:31:00,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:31:01,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 3795 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:31:01,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:31:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3518 backedges. 531 proven. 0 refuted. 0 times theorem prover too weak. 2987 trivial. 0 not checked. [2023-11-29 04:31:01,074 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:31:01,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:31:01,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174036413] [2023-11-29 04:31:01,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:31:01,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101884107] [2023-11-29 04:31:01,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101884107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:31:01,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:31:01,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:31:01,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673586009] [2023-11-29 04:31:01,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:31:01,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:31:01,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:31:01,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:31:01,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:31:01,077 INFO L87 Difference]: Start difference. First operand 1490 states and 1991 transitions. Second operand has 4 states, 3 states have (on average 54.0) internal successors, (162), 4 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 04:31:01,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:31:01,160 INFO L93 Difference]: Finished difference Result 2893 states and 3897 transitions. [2023-11-29 04:31:01,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:31:01,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 54.0) internal successors, (162), 4 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 812 [2023-11-29 04:31:01,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:31:01,165 INFO L225 Difference]: With dead ends: 2893 [2023-11-29 04:31:01,165 INFO L226 Difference]: Without dead ends: 1492 [2023-11-29 04:31:01,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 809 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:31:01,169 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 1 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:31:01,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 680 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:31:01,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2023-11-29 04:31:01,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1492. [2023-11-29 04:31:01,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1448 states have (on average 1.3211325966850829) internal successors, (1913), 1459 states have internal predecessors, (1913), 40 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (50), 31 states have call predecessors, (50), 40 states have call successors, (50) [2023-11-29 04:31:01,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 2003 transitions. [2023-11-29 04:31:01,261 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 2003 transitions. Word has length 812 [2023-11-29 04:31:01,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:31:01,262 INFO L495 AbstractCegarLoop]: Abstraction has 1492 states and 2003 transitions. [2023-11-29 04:31:01,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 54.0) internal successors, (162), 4 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 04:31:01,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 2003 transitions. [2023-11-29 04:31:01,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2023-11-29 04:31:01,280 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:31:01,280 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:31:01,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 04:31:01,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 04:31:01,481 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:31:01,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:31:01,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1337844306, now seen corresponding path program 1 times [2023-11-29 04:31:01,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:31:01,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43468150] [2023-11-29 04:31:01,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:31:01,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:31:01,877 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:31:01,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953380805] [2023-11-29 04:31:01,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:31:01,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:31:01,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:31:01,879 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:31:01,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 04:31:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:31:29,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 3825 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 04:31:29,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:31:30,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 04:31:31,138 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:31:31,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-29 04:31:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3523 backedges. 1919 proven. 942 refuted. 0 times theorem prover too weak. 662 trivial. 0 not checked. [2023-11-29 04:31:31,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:31:32,122 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:31:32,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 04:31:57,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:31:57,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43468150] [2023-11-29 04:31:57,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:31:57,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953380805] [2023-11-29 04:31:57,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953380805] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:31:57,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:31:57,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-29 04:31:57,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333812784] [2023-11-29 04:31:57,778 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 04:31:57,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 04:31:57,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:31:57,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 04:31:57,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2023-11-29 04:31:57,780 INFO L87 Difference]: Start difference. First operand 1492 states and 2003 transitions. Second operand has 18 states, 18 states have (on average 29.27777777777778) internal successors, (527), 18 states have internal predecessors, (527), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:31:59,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 04:32:09,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:32:09,408 INFO L93 Difference]: Finished difference Result 2208 states and 2977 transitions. [2023-11-29 04:32:09,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 04:32:09,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 29.27777777777778) internal successors, (527), 18 states have internal predecessors, (527), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 814 [2023-11-29 04:32:09,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:32:09,412 INFO L225 Difference]: With dead ends: 2208 [2023-11-29 04:32:09,412 INFO L226 Difference]: Without dead ends: 1488 [2023-11-29 04:32:09,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1562 GetRequests, 1524 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 04:32:09,414 INFO L413 NwaCegarLoop]: 1079 mSDtfsCounter, 1062 mSDsluCounter, 10119 mSDsCounter, 0 mSdLazyCounter, 5100 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 11198 SdHoareTripleChecker+Invalid, 5109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 5100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:32:09,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1079 Valid, 11198 Invalid, 5109 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9 Valid, 5100 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2023-11-29 04:32:09,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2023-11-29 04:32:09,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1488. [2023-11-29 04:32:09,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1444 states have (on average 1.3213296398891967) internal successors, (1908), 1455 states have internal predecessors, (1908), 40 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (50), 31 states have call predecessors, (50), 40 states have call successors, (50) [2023-11-29 04:32:09,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 1998 transitions. [2023-11-29 04:32:09,457 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 1998 transitions. Word has length 814 [2023-11-29 04:32:09,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:32:09,457 INFO L495 AbstractCegarLoop]: Abstraction has 1488 states and 1998 transitions. [2023-11-29 04:32:09,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 29.27777777777778) internal successors, (527), 18 states have internal predecessors, (527), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:32:09,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 1998 transitions. [2023-11-29 04:32:09,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2023-11-29 04:32:09,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:32:09,464 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:32:09,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 04:32:09,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:32:09,665 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:32:09,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:32:09,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1068249912, now seen corresponding path program 2 times [2023-11-29 04:32:09,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:32:09,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200732805] [2023-11-29 04:32:09,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:32:09,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:32:09,930 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:32:09,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842457570] [2023-11-29 04:32:09,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:32:09,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:32:09,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:32:09,931 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:32:09,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d9982d-cb1c-4287-9381-0e72e4ea3eaf/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process