./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e2d96ac7da90505ebe789a14ca36a5b916234d7d0d8ab11cf581076a8deb0195 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:48:47,815 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:48:47,889 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:48:47,895 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:48:47,896 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:48:47,932 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:48:47,935 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:48:47,936 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:48:47,937 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:48:47,938 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:48:47,939 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:48:47,940 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:48:47,941 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:48:47,944 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:48:47,944 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:48:47,945 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:48:47,946 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:48:47,950 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:48:47,951 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:48:47,951 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:48:47,952 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:48:47,952 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:48:47,953 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:48:47,953 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:48:47,954 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:48:47,954 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:48:47,954 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:48:47,955 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:48:47,956 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:48:47,956 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:48:47,958 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:48:47,958 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:48:47,958 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:48:47,959 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:48:47,959 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:48:47,959 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:48:47,960 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:48:47,960 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:48:47,960 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:48:47,960 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:48:47,960 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:48:47,961 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:48:47,961 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_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e2d96ac7da90505ebe789a14ca36a5b916234d7d0d8ab11cf581076a8deb0195 [2023-11-24 21:48:48,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:48:48,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:48:48,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:48:48,318 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:48:48,319 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:48:48,320 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-2.i [2023-11-24 21:48:51,476 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:48:51,989 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:48:51,991 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-2.i [2023-11-24 21:48:52,026 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/data/792c604a9/7924a066385c42e897bd2ad3f9455c94/FLAG59d2f6fa7 [2023-11-24 21:48:52,046 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/data/792c604a9/7924a066385c42e897bd2ad3f9455c94 [2023-11-24 21:48:52,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:48:52,057 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:48:52,062 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:48:52,062 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:48:52,068 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:48:52,069 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:48:52" (1/1) ... [2023-11-24 21:48:52,070 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ce3ae15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:52, skipping insertion in model container [2023-11-24 21:48:52,070 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:48:52" (1/1) ... [2023-11-24 21:48:52,167 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:48:52,651 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_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-2.i[33022,33035] [2023-11-24 21:48:52,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:48:52,971 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:48:53,013 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_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-2.i[33022,33035] [2023-11-24 21:48:53,168 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:48:53,206 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:48:53,214 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:48:53,215 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:53 WrapperNode [2023-11-24 21:48:53,215 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:48:53,217 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:48:53,217 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:48:53,217 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:48:53,225 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:53" (1/1) ... [2023-11-24 21:48:53,277 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:53" (1/1) ... [2023-11-24 21:48:53,436 INFO L138 Inliner]: procedures = 177, calls = 575, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 3295 [2023-11-24 21:48:53,436 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:48:53,437 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:48:53,437 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:48:53,438 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:48:53,452 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:53" (1/1) ... [2023-11-24 21:48:53,452 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:53" (1/1) ... [2023-11-24 21:48:53,468 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:53" (1/1) ... [2023-11-24 21:48:53,670 INFO L175 MemorySlicer]: Split 538 memory accesses to 5 slices as follows [2, 5, 5, 106, 420]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 96 writes are split as follows [0, 1, 1, 4, 90]. [2023-11-24 21:48:53,670 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:53" (1/1) ... [2023-11-24 21:48:53,670 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:53" (1/1) ... [2023-11-24 21:48:53,761 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:53" (1/1) ... [2023-11-24 21:48:53,817 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:53" (1/1) ... [2023-11-24 21:48:53,847 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:53" (1/1) ... [2023-11-24 21:48:53,862 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:53" (1/1) ... [2023-11-24 21:48:53,897 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:48:53,898 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:48:53,898 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:48:53,899 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:48:53,899 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:53" (1/1) ... [2023-11-24 21:48:53,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:48:53,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:48:53,947 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:48:53,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:48:53,991 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2023-11-24 21:48:53,992 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2023-11-24 21:48:53,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:48:53,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:48:53,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:48:53,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:48:53,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 21:48:53,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 21:48:53,995 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 21:48:53,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:48:53,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:48:53,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:48:53,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:48:53,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 21:48:53,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2023-11-24 21:48:53,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2023-11-24 21:48:53,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2023-11-24 21:48:53,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#3 [2023-11-24 21:48:53,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#4 [2023-11-24 21:48:53,997 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2023-11-24 21:48:53,997 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2023-11-24 21:48:53,998 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2023-11-24 21:48:53,998 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#3 [2023-11-24 21:48:53,998 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#4 [2023-11-24 21:48:53,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:48:53,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:48:53,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 21:48:53,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 21:48:54,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 21:48:54,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-24 21:48:54,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-24 21:48:54,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:48:54,056 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-24 21:48:54,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:48:54,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 21:48:54,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 21:48:54,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-24 21:48:54,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-24 21:48:54,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:48:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:48:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:48:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:48:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:48:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 21:48:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:48:54,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:48:54,451 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:48:54,454 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:48:57,860 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:48:57,950 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:48:57,950 INFO L309 CfgBuilder]: Removed 160 assume(true) statements. [2023-11-24 21:48:57,951 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:48:57 BoogieIcfgContainer [2023-11-24 21:48:57,951 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:48:57,953 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:48:57,953 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:48:57,957 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:48:57,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:48:52" (1/3) ... [2023-11-24 21:48:57,958 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4577810a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:48:57, skipping insertion in model container [2023-11-24 21:48:57,958 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:53" (2/3) ... [2023-11-24 21:48:57,959 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4577810a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:48:57, skipping insertion in model container [2023-11-24 21:48:57,959 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:48:57" (3/3) ... [2023-11-24 21:48:57,960 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_BER_test10-2.i [2023-11-24 21:48:57,981 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:48:57,981 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:48:58,057 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:48:58,063 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;@20ed089f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:48:58,064 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 21:48:58,072 INFO L276 IsEmpty]: Start isEmpty. Operand has 938 states, 919 states have (on average 1.7149075081610445) internal successors, (1576), 924 states have internal predecessors, (1576), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-24 21:48:58,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 21:48:58,081 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:58,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:58,082 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:48:58,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:58,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1979423608, now seen corresponding path program 1 times [2023-11-24 21:48:58,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:58,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208521522] [2023-11-24 21:48:58,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:58,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:58,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:58,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:58,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208521522] [2023-11-24 21:48:58,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208521522] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:58,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:58,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:48:58,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795119584] [2023-11-24 21:48:58,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:58,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 21:48:58,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:58,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 21:48:58,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:48:58,362 INFO L87 Difference]: Start difference. First operand has 938 states, 919 states have (on average 1.7149075081610445) internal successors, (1576), 924 states have internal predecessors, (1576), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:58,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:58,553 INFO L93 Difference]: Finished difference Result 1875 states and 3215 transitions. [2023-11-24 21:48:58,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 21:48:58,555 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-24 21:48:58,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:58,580 INFO L225 Difference]: With dead ends: 1875 [2023-11-24 21:48:58,580 INFO L226 Difference]: Without dead ends: 903 [2023-11-24 21:48:58,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:48:58,593 INFO L413 NwaCegarLoop]: 1431 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1431 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:58,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1431 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:48:58,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2023-11-24 21:48:58,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 903. [2023-11-24 21:48:58,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 885 states have (on average 1.5378531073446329) internal successors, (1361), 890 states have internal predecessors, (1361), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-24 21:48:58,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1388 transitions. [2023-11-24 21:48:58,719 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1388 transitions. Word has length 12 [2023-11-24 21:48:58,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:58,719 INFO L495 AbstractCegarLoop]: Abstraction has 903 states and 1388 transitions. [2023-11-24 21:48:58,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:58,720 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1388 transitions. [2023-11-24 21:48:58,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-24 21:48:58,735 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:58,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:58,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:48:58,736 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:48:58,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:58,739 INFO L85 PathProgramCache]: Analyzing trace with hash 798405662, now seen corresponding path program 1 times [2023-11-24 21:48:58,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:58,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633507585] [2023-11-24 21:48:58,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:58,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:59,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:59,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:59,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633507585] [2023-11-24 21:48:59,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633507585] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:59,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:59,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:48:59,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538215320] [2023-11-24 21:48:59,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:59,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:48:59,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:59,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:48:59,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:48:59,350 INFO L87 Difference]: Start difference. First operand 903 states and 1388 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:59,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:59,616 INFO L93 Difference]: Finished difference Result 1802 states and 2772 transitions. [2023-11-24 21:48:59,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:48:59,617 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-24 21:48:59,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:59,626 INFO L225 Difference]: With dead ends: 1802 [2023-11-24 21:48:59,627 INFO L226 Difference]: Without dead ends: 1245 [2023-11-24 21:48:59,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:48:59,630 INFO L413 NwaCegarLoop]: 1381 mSDtfsCounter, 504 mSDsluCounter, 2698 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 4079 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:59,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 4079 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:48:59,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2023-11-24 21:48:59,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 905. [2023-11-24 21:48:59,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 887 states have (on average 1.536640360766629) internal successors, (1363), 892 states have internal predecessors, (1363), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-24 21:48:59,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1390 transitions. [2023-11-24 21:48:59,685 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1390 transitions. Word has length 67 [2023-11-24 21:48:59,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:59,687 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1390 transitions. [2023-11-24 21:48:59,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:59,688 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1390 transitions. [2023-11-24 21:48:59,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-24 21:48:59,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:59,700 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:59,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:48:59,701 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:48:59,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:59,701 INFO L85 PathProgramCache]: Analyzing trace with hash 2044985054, now seen corresponding path program 1 times [2023-11-24 21:48:59,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:59,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712922935] [2023-11-24 21:48:59,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:59,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:59,790 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:48:59,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869070129] [2023-11-24 21:48:59,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:59,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:48:59,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:48:59,796 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:48:59,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:49:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:00,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:49:00,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:00,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:00,329 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:49:00,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:00,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712922935] [2023-11-24 21:49:00,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:49:00,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869070129] [2023-11-24 21:49:00,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869070129] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:00,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:00,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:49:00,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808802802] [2023-11-24 21:49:00,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:00,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:49:00,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:00,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:49:00,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:00,333 INFO L87 Difference]: Start difference. First operand 905 states and 1390 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:00,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:00,498 INFO L93 Difference]: Finished difference Result 1828 states and 2808 transitions. [2023-11-24 21:49:00,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:49:00,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2023-11-24 21:49:00,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:00,505 INFO L225 Difference]: With dead ends: 1828 [2023-11-24 21:49:00,505 INFO L226 Difference]: Without dead ends: 926 [2023-11-24 21:49:00,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:00,509 INFO L413 NwaCegarLoop]: 1365 mSDtfsCounter, 9 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2716 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:00,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 2716 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:49:00,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2023-11-24 21:49:00,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 925. [2023-11-24 21:49:00,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 907 states have (on average 1.5248070562293274) internal successors, (1383), 912 states have internal predecessors, (1383), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-24 21:49:00,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1410 transitions. [2023-11-24 21:49:00,544 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1410 transitions. Word has length 144 [2023-11-24 21:49:00,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:00,545 INFO L495 AbstractCegarLoop]: Abstraction has 925 states and 1410 transitions. [2023-11-24 21:49:00,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:00,545 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1410 transitions. [2023-11-24 21:49:00,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-24 21:49:00,549 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:00,549 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:00,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:00,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:00,757 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:49:00,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:00,758 INFO L85 PathProgramCache]: Analyzing trace with hash 752345690, now seen corresponding path program 1 times [2023-11-24 21:49:00,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:00,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889289549] [2023-11-24 21:49:00,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:00,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:00,843 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:49:00,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131161149] [2023-11-24 21:49:00,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:00,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:00,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:00,849 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:00,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:49:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:01,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:49:01,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 21:49:01,332 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:49:01,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:01,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889289549] [2023-11-24 21:49:01,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:49:01,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131161149] [2023-11-24 21:49:01,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131161149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:01,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:01,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:49:01,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978610858] [2023-11-24 21:49:01,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:01,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:49:01,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:01,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:49:01,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:01,336 INFO L87 Difference]: Start difference. First operand 925 states and 1410 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:01,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:01,478 INFO L93 Difference]: Finished difference Result 1455 states and 2229 transitions. [2023-11-24 21:49:01,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:49:01,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2023-11-24 21:49:01,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:01,487 INFO L225 Difference]: With dead ends: 1455 [2023-11-24 21:49:01,488 INFO L226 Difference]: Without dead ends: 946 [2023-11-24 21:49:01,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:01,493 INFO L413 NwaCegarLoop]: 1365 mSDtfsCounter, 9 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2716 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:01,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 2716 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:49:01,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2023-11-24 21:49:01,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 945. [2023-11-24 21:49:01,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 927 states have (on average 1.5134843581445523) internal successors, (1403), 932 states have internal predecessors, (1403), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-24 21:49:01,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1430 transitions. [2023-11-24 21:49:01,532 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1430 transitions. Word has length 144 [2023-11-24 21:49:01,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:01,533 INFO L495 AbstractCegarLoop]: Abstraction has 945 states and 1430 transitions. [2023-11-24 21:49:01,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:01,533 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1430 transitions. [2023-11-24 21:49:01,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-24 21:49:01,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:01,537 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:01,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:01,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:01,746 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:49:01,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:01,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1186816356, now seen corresponding path program 1 times [2023-11-24 21:49:01,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:01,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810880210] [2023-11-24 21:49:01,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:01,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:01,825 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:49:01,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770754454] [2023-11-24 21:49:01,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:01,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:01,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:01,827 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:01,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:49:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:02,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:49:02,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:02,365 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:49:02,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:02,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810880210] [2023-11-24 21:49:02,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:49:02,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770754454] [2023-11-24 21:49:02,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770754454] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:02,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:02,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:49:02,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388382908] [2023-11-24 21:49:02,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:02,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:49:02,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:02,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:49:02,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:49:02,369 INFO L87 Difference]: Start difference. First operand 945 states and 1430 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:02,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:02,517 INFO L93 Difference]: Finished difference Result 1874 states and 2844 transitions. [2023-11-24 21:49:02,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:49:02,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2023-11-24 21:49:02,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:02,524 INFO L225 Difference]: With dead ends: 1874 [2023-11-24 21:49:02,524 INFO L226 Difference]: Without dead ends: 932 [2023-11-24 21:49:02,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:49:02,527 INFO L413 NwaCegarLoop]: 1358 mSDtfsCounter, 165 mSDsluCounter, 2564 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 3922 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:02,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 3922 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:49:02,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2023-11-24 21:49:02,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 931. [2023-11-24 21:49:02,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 913 states have (on average 1.5136911281489596) internal successors, (1382), 918 states have internal predecessors, (1382), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-24 21:49:02,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1409 transitions. [2023-11-24 21:49:02,561 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1409 transitions. Word has length 144 [2023-11-24 21:49:02,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:02,561 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 1409 transitions. [2023-11-24 21:49:02,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:02,562 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1409 transitions. [2023-11-24 21:49:02,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-24 21:49:02,564 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:02,565 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:02,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:02,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:02,774 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:49:02,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:02,774 INFO L85 PathProgramCache]: Analyzing trace with hash -2107495894, now seen corresponding path program 1 times [2023-11-24 21:49:02,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:02,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446255759] [2023-11-24 21:49:02,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:02,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:02,832 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:49:02,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137654117] [2023-11-24 21:49:02,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:02,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:02,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:02,833 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:02,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:49:03,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:03,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:49:03,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:03,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 21:49:03,324 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:49:03,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:03,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446255759] [2023-11-24 21:49:03,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:49:03,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137654117] [2023-11-24 21:49:03,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137654117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:03,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:03,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:49:03,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927710562] [2023-11-24 21:49:03,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:03,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:49:03,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:03,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:49:03,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:49:03,330 INFO L87 Difference]: Start difference. First operand 931 states and 1409 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:03,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:03,492 INFO L93 Difference]: Finished difference Result 1429 states and 2177 transitions. [2023-11-24 21:49:03,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:49:03,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2023-11-24 21:49:03,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:03,501 INFO L225 Difference]: With dead ends: 1429 [2023-11-24 21:49:03,502 INFO L226 Difference]: Without dead ends: 918 [2023-11-24 21:49:03,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:49:03,506 INFO L413 NwaCegarLoop]: 1351 mSDtfsCounter, 165 mSDsluCounter, 2550 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 3901 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:03,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 3901 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:49:03,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2023-11-24 21:49:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 917. [2023-11-24 21:49:03,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 899 states have (on average 1.513904338153504) internal successors, (1361), 904 states have internal predecessors, (1361), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-24 21:49:03,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1388 transitions. [2023-11-24 21:49:03,539 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1388 transitions. Word has length 144 [2023-11-24 21:49:03,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:03,540 INFO L495 AbstractCegarLoop]: Abstraction has 917 states and 1388 transitions. [2023-11-24 21:49:03,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:03,540 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1388 transitions. [2023-11-24 21:49:03,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-24 21:49:03,543 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:03,543 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:03,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:03,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-24 21:49:03,751 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:49:03,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:03,752 INFO L85 PathProgramCache]: Analyzing trace with hash -127345828, now seen corresponding path program 1 times [2023-11-24 21:49:03,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:03,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521372366] [2023-11-24 21:49:03,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:03,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:03,808 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:49:03,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119821296] [2023-11-24 21:49:03,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:03,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:03,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:03,810 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:03,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:49:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:04,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:49:04,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:04,592 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:49:04,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:04,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521372366] [2023-11-24 21:49:04,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:49:04,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119821296] [2023-11-24 21:49:04,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119821296] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:04,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:04,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:49:04,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24350226] [2023-11-24 21:49:04,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:04,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:49:04,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:04,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:49:04,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:04,595 INFO L87 Difference]: Start difference. First operand 917 states and 1388 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:04,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:04,731 INFO L93 Difference]: Finished difference Result 2372 states and 3606 transitions. [2023-11-24 21:49:04,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:49:04,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2023-11-24 21:49:04,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:04,742 INFO L225 Difference]: With dead ends: 2372 [2023-11-24 21:49:04,742 INFO L226 Difference]: Without dead ends: 1458 [2023-11-24 21:49:04,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:04,746 INFO L413 NwaCegarLoop]: 1546 mSDtfsCounter, 765 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 2890 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:04,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 2890 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:49:04,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2023-11-24 21:49:04,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1453. [2023-11-24 21:49:04,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1430 states have (on average 1.5223776223776224) internal successors, (2177), 1435 states have internal predecessors, (2177), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-24 21:49:04,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 2214 transitions. [2023-11-24 21:49:04,803 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 2214 transitions. Word has length 144 [2023-11-24 21:49:04,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:04,805 INFO L495 AbstractCegarLoop]: Abstraction has 1453 states and 2214 transitions. [2023-11-24 21:49:04,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:04,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 2214 transitions. [2023-11-24 21:49:04,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-11-24 21:49:04,809 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:04,809 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:04,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:05,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-24 21:49:05,017 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:49:05,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:05,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1781721850, now seen corresponding path program 1 times [2023-11-24 21:49:05,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:05,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97313657] [2023-11-24 21:49:05,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:05,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:05,098 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:49:05,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821423684] [2023-11-24 21:49:05,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:05,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:05,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:05,100 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:05,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:49:05,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:05,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:49:05,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:05,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:49:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:49:05,705 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:49:05,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:05,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97313657] [2023-11-24 21:49:05,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:49:05,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821423684] [2023-11-24 21:49:05,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821423684] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:05,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:05,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:49:05,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931201076] [2023-11-24 21:49:05,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:05,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:49:05,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:05,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:49:05,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:49:05,709 INFO L87 Difference]: Start difference. First operand 1453 states and 2214 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:49:05,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:05,916 INFO L93 Difference]: Finished difference Result 2790 states and 4244 transitions. [2023-11-24 21:49:05,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:49:05,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 157 [2023-11-24 21:49:05,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:05,925 INFO L225 Difference]: With dead ends: 2790 [2023-11-24 21:49:05,926 INFO L226 Difference]: Without dead ends: 1511 [2023-11-24 21:49:05,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:49:05,929 INFO L413 NwaCegarLoop]: 1367 mSDtfsCounter, 490 mSDsluCounter, 2677 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 4044 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:05,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 4044 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:49:05,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2023-11-24 21:49:05,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1453. [2023-11-24 21:49:05,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1430 states have (on average 1.5216783216783216) internal successors, (2176), 1435 states have internal predecessors, (2176), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-24 21:49:05,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 2213 transitions. [2023-11-24 21:49:05,985 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 2213 transitions. Word has length 157 [2023-11-24 21:49:05,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:05,985 INFO L495 AbstractCegarLoop]: Abstraction has 1453 states and 2213 transitions. [2023-11-24 21:49:05,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:49:05,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 2213 transitions. [2023-11-24 21:49:05,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-11-24 21:49:05,990 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:05,990 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:06,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-24 21:49:06,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-24 21:49:06,198 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:49:06,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:06,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1352155391, now seen corresponding path program 1 times [2023-11-24 21:49:06,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:06,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943008284] [2023-11-24 21:49:06,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:06,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:06,295 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:49:06,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763751877] [2023-11-24 21:49:06,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:06,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:06,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:06,297 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:06,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:49:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:06,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:49:06,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:49:06,990 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:49:06,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:06,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943008284] [2023-11-24 21:49:06,991 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:49:06,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763751877] [2023-11-24 21:49:06,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763751877] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:06,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:06,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:49:06,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357329364] [2023-11-24 21:49:06,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:06,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:49:06,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:06,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:49:06,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:06,995 INFO L87 Difference]: Start difference. First operand 1453 states and 2213 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:49:07,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:07,138 INFO L93 Difference]: Finished difference Result 2895 states and 4405 transitions. [2023-11-24 21:49:07,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:49:07,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 228 [2023-11-24 21:49:07,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:07,150 INFO L225 Difference]: With dead ends: 2895 [2023-11-24 21:49:07,151 INFO L226 Difference]: Without dead ends: 1495 [2023-11-24 21:49:07,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:07,156 INFO L413 NwaCegarLoop]: 1351 mSDtfsCounter, 9 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2688 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:07,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 2688 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:49:07,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2023-11-24 21:49:07,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 1493. [2023-11-24 21:49:07,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1493 states, 1470 states have (on average 1.5074829931972789) internal successors, (2216), 1475 states have internal predecessors, (2216), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-24 21:49:07,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2253 transitions. [2023-11-24 21:49:07,213 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2253 transitions. Word has length 228 [2023-11-24 21:49:07,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:07,214 INFO L495 AbstractCegarLoop]: Abstraction has 1493 states and 2253 transitions. [2023-11-24 21:49:07,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:49:07,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2253 transitions. [2023-11-24 21:49:07,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-11-24 21:49:07,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:07,219 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:07,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:07,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:07,429 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:49:07,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:07,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1482019969, now seen corresponding path program 1 times [2023-11-24 21:49:07,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:07,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726712318] [2023-11-24 21:49:07,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:07,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:07,524 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:49:07,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463740659] [2023-11-24 21:49:07,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:07,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:07,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:07,526 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:07,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:49:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:08,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:49:08,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:49:08,257 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:49:08,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:08,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726712318] [2023-11-24 21:49:08,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:49:08,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463740659] [2023-11-24 21:49:08,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463740659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:08,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:08,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:49:08,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760356237] [2023-11-24 21:49:08,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:08,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:49:08,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:08,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:49:08,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:49:08,264 INFO L87 Difference]: Start difference. First operand 1493 states and 2253 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:49:08,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:08,406 INFO L93 Difference]: Finished difference Result 2889 states and 4370 transitions. [2023-11-24 21:49:08,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:49:08,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 228 [2023-11-24 21:49:08,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:08,417 INFO L225 Difference]: With dead ends: 2889 [2023-11-24 21:49:08,417 INFO L226 Difference]: Without dead ends: 1467 [2023-11-24 21:49:08,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:49:08,421 INFO L413 NwaCegarLoop]: 1344 mSDtfsCounter, 165 mSDsluCounter, 2536 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 3880 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:08,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 3880 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:49:08,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2023-11-24 21:49:08,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1465. [2023-11-24 21:49:08,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1442 states have (on average 1.507628294036061) internal successors, (2174), 1447 states have internal predecessors, (2174), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-24 21:49:08,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 2211 transitions. [2023-11-24 21:49:08,477 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 2211 transitions. Word has length 228 [2023-11-24 21:49:08,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:08,477 INFO L495 AbstractCegarLoop]: Abstraction has 1465 states and 2211 transitions. [2023-11-24 21:49:08,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:49:08,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 2211 transitions. [2023-11-24 21:49:08,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-11-24 21:49:08,482 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:08,482 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:08,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:08,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 21:49:08,692 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:49:08,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:08,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1746734067, now seen corresponding path program 1 times [2023-11-24 21:49:08,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:08,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256416017] [2023-11-24 21:49:08,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:08,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:08,781 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:49:08,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391624922] [2023-11-24 21:49:08,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:08,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:08,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:08,783 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:08,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 21:49:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:09,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:49:09,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:09,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:49:09,791 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:49:09,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:09,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256416017] [2023-11-24 21:49:09,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:49:09,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391624922] [2023-11-24 21:49:09,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391624922] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:09,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:09,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:49:09,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879805853] [2023-11-24 21:49:09,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:09,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:49:09,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:09,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:49:09,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:09,797 INFO L87 Difference]: Start difference. First operand 1465 states and 2211 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:49:09,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:09,937 INFO L93 Difference]: Finished difference Result 3418 states and 5203 transitions. [2023-11-24 21:49:09,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:49:09,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 228 [2023-11-24 21:49:09,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:09,952 INFO L225 Difference]: With dead ends: 3418 [2023-11-24 21:49:09,952 INFO L226 Difference]: Without dead ends: 2083 [2023-11-24 21:49:09,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:09,956 INFO L413 NwaCegarLoop]: 1362 mSDtfsCounter, 725 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 2699 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:09,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 2699 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:49:09,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2023-11-24 21:49:10,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1828. [2023-11-24 21:49:10,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1802 states have (on average 1.5205327413984462) internal successors, (2740), 1807 states have internal predecessors, (2740), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-24 21:49:10,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 2783 transitions. [2023-11-24 21:49:10,049 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 2783 transitions. Word has length 228 [2023-11-24 21:49:10,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:10,050 INFO L495 AbstractCegarLoop]: Abstraction has 1828 states and 2783 transitions. [2023-11-24 21:49:10,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:49:10,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 2783 transitions. [2023-11-24 21:49:10,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2023-11-24 21:49:10,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:10,056 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:10,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:10,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:10,266 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:49:10,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:10,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1422447894, now seen corresponding path program 1 times [2023-11-24 21:49:10,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:10,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934438020] [2023-11-24 21:49:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:10,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:10,365 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:49:10,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471206641] [2023-11-24 21:49:10,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:10,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:10,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:10,367 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:10,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 21:49:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:11,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:49:11,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-24 21:49:11,564 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:49:11,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:11,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934438020] [2023-11-24 21:49:11,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:49:11,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471206641] [2023-11-24 21:49:11,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471206641] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:11,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:11,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:49:11,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797028896] [2023-11-24 21:49:11,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:11,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:49:11,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:11,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:49:11,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:49:11,568 INFO L87 Difference]: Start difference. First operand 1828 states and 2783 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-24 21:49:12,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:12,053 INFO L93 Difference]: Finished difference Result 2989 states and 4549 transitions. [2023-11-24 21:49:12,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:49:12,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 241 [2023-11-24 21:49:12,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:12,064 INFO L225 Difference]: With dead ends: 2989 [2023-11-24 21:49:12,064 INFO L226 Difference]: Without dead ends: 1454 [2023-11-24 21:49:12,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:49:12,068 INFO L413 NwaCegarLoop]: 1460 mSDtfsCounter, 2420 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2420 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:12,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2420 Valid, 1701 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 21:49:12,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2023-11-24 21:49:12,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1454. [2023-11-24 21:49:12,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1433 states have (on average 1.5073272854152129) internal successors, (2160), 1438 states have internal predecessors, (2160), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-24 21:49:12,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 2193 transitions. [2023-11-24 21:49:12,125 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 2193 transitions. Word has length 241 [2023-11-24 21:49:12,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:12,126 INFO L495 AbstractCegarLoop]: Abstraction has 1454 states and 2193 transitions. [2023-11-24 21:49:12,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-24 21:49:12,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 2193 transitions. [2023-11-24 21:49:12,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-11-24 21:49:12,131 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:12,131 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:12,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:12,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:12,346 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:49:12,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:12,346 INFO L85 PathProgramCache]: Analyzing trace with hash 922662729, now seen corresponding path program 1 times [2023-11-24 21:49:12,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:12,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802135852] [2023-11-24 21:49:12,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:12,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:12,463 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:49:12,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353134073] [2023-11-24 21:49:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:12,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:12,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:12,468 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:12,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 21:49:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:13,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 1244 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:49:13,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:13,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:49:13,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-24 21:49:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-24 21:49:13,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-24 21:49:14,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:14,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802135852] [2023-11-24 21:49:14,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:49:14,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353134073] [2023-11-24 21:49:14,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353134073] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:49:14,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:49:14,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-24 21:49:14,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564846325] [2023-11-24 21:49:14,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:14,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:49:14,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:14,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:49:14,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:49:14,115 INFO L87 Difference]: Start difference. First operand 1454 states and 2193 transitions. Second operand has 9 states, 9 states have (on average 44.22222222222222) internal successors, (398), 9 states have internal predecessors, (398), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:49:14,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:14,794 INFO L93 Difference]: Finished difference Result 3363 states and 5041 transitions. [2023-11-24 21:49:14,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:49:14,796 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 44.22222222222222) internal successors, (398), 9 states have internal predecessors, (398), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 251 [2023-11-24 21:49:14,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:14,812 INFO L225 Difference]: With dead ends: 3363 [2023-11-24 21:49:14,812 INFO L226 Difference]: Without dead ends: 2550 [2023-11-24 21:49:14,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 486 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:49:14,816 INFO L413 NwaCegarLoop]: 1782 mSDtfsCounter, 4555 mSDsluCounter, 5351 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4570 SdHoareTripleChecker+Valid, 7133 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:14,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4570 Valid, 7133 Invalid, 317 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [16 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 21:49:14,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2023-11-24 21:49:14,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 2207. [2023-11-24 21:49:14,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2174 states have (on average 1.484360625574977) internal successors, (3227), 2179 states have internal predecessors, (3227), 28 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-24 21:49:14,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 3282 transitions. [2023-11-24 21:49:14,951 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 3282 transitions. Word has length 251 [2023-11-24 21:49:14,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:14,952 INFO L495 AbstractCegarLoop]: Abstraction has 2207 states and 3282 transitions. [2023-11-24 21:49:14,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 44.22222222222222) internal successors, (398), 9 states have internal predecessors, (398), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:49:14,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 3282 transitions. [2023-11-24 21:49:14,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2023-11-24 21:49:14,979 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:14,980 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:15,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:15,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-24 21:49:15,197 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:49:15,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:15,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1381860043, now seen corresponding path program 1 times [2023-11-24 21:49:15,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:15,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160404570] [2023-11-24 21:49:15,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:15,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:15,429 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:49:15,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [719302085] [2023-11-24 21:49:15,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:15,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:15,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:15,432 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:15,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-24 21:49:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:16,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 2339 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:49:16,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:16,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:49:17,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-24 21:49:17,177 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 234 proven. 5 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-11-24 21:49:17,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 234 proven. 5 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-11-24 21:49:17,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:17,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160404570] [2023-11-24 21:49:17,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:49:17,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719302085] [2023-11-24 21:49:17,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719302085] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:49:17,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:49:17,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-24 21:49:17,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573830589] [2023-11-24 21:49:17,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:17,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:49:17,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:17,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:49:17,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:49:17,645 INFO L87 Difference]: Start difference. First operand 2207 states and 3282 transitions. Second operand has 9 states, 9 states have (on average 53.55555555555556) internal successors, (482), 9 states have internal predecessors, (482), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:49:18,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:18,346 INFO L93 Difference]: Finished difference Result 4233 states and 6305 transitions. [2023-11-24 21:49:18,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:49:18,347 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 53.55555555555556) internal successors, (482), 9 states have internal predecessors, (482), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 482 [2023-11-24 21:49:18,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:18,363 INFO L225 Difference]: With dead ends: 4233 [2023-11-24 21:49:18,363 INFO L226 Difference]: Without dead ends: 2550 [2023-11-24 21:49:18,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 948 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:49:18,368 INFO L413 NwaCegarLoop]: 1810 mSDtfsCounter, 2356 mSDsluCounter, 8859 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2370 SdHoareTripleChecker+Valid, 10669 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:18,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2370 Valid, 10669 Invalid, 403 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 21:49:18,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2023-11-24 21:49:18,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 2210. [2023-11-24 21:49:18,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2210 states, 2177 states have (on average 1.4827744602664217) internal successors, (3228), 2182 states have internal predecessors, (3228), 28 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-24 21:49:18,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2210 states to 2210 states and 3283 transitions. [2023-11-24 21:49:18,464 INFO L78 Accepts]: Start accepts. Automaton has 2210 states and 3283 transitions. Word has length 482 [2023-11-24 21:49:18,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:18,464 INFO L495 AbstractCegarLoop]: Abstraction has 2210 states and 3283 transitions. [2023-11-24 21:49:18,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 53.55555555555556) internal successors, (482), 9 states have internal predecessors, (482), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:49:18,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2210 states and 3283 transitions. [2023-11-24 21:49:18,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 696 [2023-11-24 21:49:18,489 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:18,490 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:18,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:18,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-24 21:49:18,708 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:49:18,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:18,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1662348722, now seen corresponding path program 1 times [2023-11-24 21:49:18,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:18,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487498515] [2023-11-24 21:49:18,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:18,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:19,030 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:49:19,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650893429] [2023-11-24 21:49:19,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:19,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:19,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:19,033 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:19,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-24 21:49:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:20,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 3296 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:49:20,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:20,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:49:21,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-24 21:49:21,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-24 21:49:21,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-24 21:49:21,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-24 21:49:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 884 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-24 21:49:21,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 884 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-24 21:49:23,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:23,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487498515] [2023-11-24 21:49:23,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:49:23,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650893429] [2023-11-24 21:49:23,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650893429] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:49:23,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:49:23,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-24 21:49:23,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997468587] [2023-11-24 21:49:23,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:23,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:49:23,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:23,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:49:23,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:49:23,113 INFO L87 Difference]: Start difference. First operand 2210 states and 3283 transitions. Second operand has 15 states, 15 states have (on average 85.73333333333333) internal successors, (1286), 15 states have internal predecessors, (1286), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:49:24,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:24,607 INFO L93 Difference]: Finished difference Result 5433 states and 8059 transitions. [2023-11-24 21:49:24,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-24 21:49:24,609 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 85.73333333333333) internal successors, (1286), 15 states have internal predecessors, (1286), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 695 [2023-11-24 21:49:24,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:24,638 INFO L225 Difference]: With dead ends: 5433 [2023-11-24 21:49:24,638 INFO L226 Difference]: Without dead ends: 4620 [2023-11-24 21:49:24,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1398 GetRequests, 1368 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2023-11-24 21:49:24,642 INFO L413 NwaCegarLoop]: 3240 mSDtfsCounter, 8342 mSDsluCounter, 25267 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8381 SdHoareTripleChecker+Valid, 28507 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:24,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8381 Valid, 28507 Invalid, 906 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [25 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 21:49:24,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4620 states. [2023-11-24 21:49:24,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4620 to 4277. [2023-11-24 21:49:24,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4277 states, 4220 states have (on average 1.4677725118483411) internal successors, (6194), 4225 states have internal predecessors, (6194), 52 states have call successors, (52), 4 states have call predecessors, (52), 4 states have return successors, (51), 48 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-24 21:49:24,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4277 states to 4277 states and 6297 transitions. [2023-11-24 21:49:24,807 INFO L78 Accepts]: Start accepts. Automaton has 4277 states and 6297 transitions. Word has length 695 [2023-11-24 21:49:24,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:24,809 INFO L495 AbstractCegarLoop]: Abstraction has 4277 states and 6297 transitions. [2023-11-24 21:49:24,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 85.73333333333333) internal successors, (1286), 15 states have internal predecessors, (1286), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:49:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 4277 states and 6297 transitions. [2023-11-24 21:49:24,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1158 [2023-11-24 21:49:24,832 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:24,833 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:24,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:25,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-24 21:49:25,040 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:49:25,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:25,041 INFO L85 PathProgramCache]: Analyzing trace with hash -377738318, now seen corresponding path program 1 times [2023-11-24 21:49:25,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:25,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502323972] [2023-11-24 21:49:25,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:25,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:25,590 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:49:25,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1163493583] [2023-11-24 21:49:25,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:25,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:25,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:25,597 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:25,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-24 21:49:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:28,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 5486 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:49:28,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:28,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:49:28,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-24 21:49:28,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-24 21:49:29,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-24 21:49:29,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-24 21:49:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3905 backedges. 1851 proven. 896 refuted. 0 times theorem prover too weak. 1158 trivial. 0 not checked. [2023-11-24 21:49:29,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:30,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3905 backedges. 1851 proven. 896 refuted. 0 times theorem prover too weak. 1158 trivial. 0 not checked. [2023-11-24 21:49:30,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:30,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502323972] [2023-11-24 21:49:30,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:49:30,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163493583] [2023-11-24 21:49:30,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163493583] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:49:30,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:49:30,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-24 21:49:30,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784359598] [2023-11-24 21:49:30,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:30,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:49:30,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:30,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:49:30,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:49:30,476 INFO L87 Difference]: Start difference. First operand 4277 states and 6297 transitions. Second operand has 15 states, 15 states have (on average 91.33333333333333) internal successors, (1370), 15 states have internal predecessors, (1370), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:49:31,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:31,665 INFO L93 Difference]: Finished difference Result 7338 states and 10829 transitions. [2023-11-24 21:49:31,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-24 21:49:31,666 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 91.33333333333333) internal successors, (1370), 15 states have internal predecessors, (1370), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 1157 [2023-11-24 21:49:31,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:31,687 INFO L225 Difference]: With dead ends: 7338 [2023-11-24 21:49:31,687 INFO L226 Difference]: Without dead ends: 4620 [2023-11-24 21:49:31,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2322 GetRequests, 2292 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2023-11-24 21:49:31,692 INFO L413 NwaCegarLoop]: 3268 mSDtfsCounter, 6815 mSDsluCounter, 23191 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6853 SdHoareTripleChecker+Valid, 26459 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:31,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6853 Valid, 26459 Invalid, 653 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [21 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:49:31,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4620 states. [2023-11-24 21:49:31,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4620 to 4280. [2023-11-24 21:49:31,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4280 states, 4223 states have (on average 1.466256215960218) internal successors, (6192), 4228 states have internal predecessors, (6192), 52 states have call successors, (52), 4 states have call predecessors, (52), 4 states have return successors, (51), 48 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-24 21:49:31,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4280 states to 4280 states and 6295 transitions. [2023-11-24 21:49:31,844 INFO L78 Accepts]: Start accepts. Automaton has 4280 states and 6295 transitions. Word has length 1157 [2023-11-24 21:49:31,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:31,846 INFO L495 AbstractCegarLoop]: Abstraction has 4280 states and 6295 transitions. [2023-11-24 21:49:31,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 91.33333333333333) internal successors, (1370), 15 states have internal predecessors, (1370), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:49:31,847 INFO L276 IsEmpty]: Start isEmpty. Operand 4280 states and 6295 transitions. [2023-11-24 21:49:31,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1584 [2023-11-24 21:49:31,878 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:31,879 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:31,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:32,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-24 21:49:32,092 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:49:32,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:32,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1572435964, now seen corresponding path program 2 times [2023-11-24 21:49:32,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:32,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169285996] [2023-11-24 21:49:32,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:32,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:32,783 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:49:32,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519906434] [2023-11-24 21:49:32,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:49:32,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:32,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:32,785 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:32,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee5d06-50b4-41ba-aa8f-93f2ce8e7d40/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-24 21:49:34,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-24 21:49:34,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:49:34,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-24 21:49:34,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:36,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:49:37,116 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:49:37,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-24 21:49:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6662 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6662 trivial. 0 not checked. [2023-11-24 21:49:37,290 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:49:37,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:37,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169285996] [2023-11-24 21:49:37,290 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:49:37,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519906434] [2023-11-24 21:49:37,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519906434] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:37,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:37,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-24 21:49:37,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291145352] [2023-11-24 21:49:37,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:37,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:49:37,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:37,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:49:37,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:49:37,295 INFO L87 Difference]: Start difference. First operand 4280 states and 6295 transitions. Second operand has 11 states, 11 states have (on average 21.818181818181817) internal successors, (240), 11 states have internal predecessors, (240), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4)