./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.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_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/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_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/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_0e2520bf-272c-4f18-a54c-d6a4bad16de6/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 32a24617e0b83f023304780397185eef703cdbd26842fbad821fea93a0f1f12f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:03:13,574 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:03:13,699 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 22:03:13,703 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:03:13,704 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:03:13,746 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:03:13,747 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:03:13,748 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:03:13,749 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:03:13,756 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:03:13,757 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:03:13,757 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:03:13,758 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:03:13,760 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:03:13,760 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:03:13,760 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:03:13,761 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 22:03:13,761 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:03:13,762 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:03:13,762 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:03:13,762 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:03:13,763 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 22:03:13,763 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:03:13,764 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 22:03:13,764 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:03:13,764 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 22:03:13,765 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:03:13,766 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:03:13,766 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:03:13,766 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:03:13,768 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:03:13,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:03:13,768 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:03:13,768 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:03:13,769 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 22:03:13,769 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:03:13,769 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:03:13,769 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:03:13,770 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:03:13,770 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 22:03:13,770 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:03:13,770 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:03:13,770 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_0e2520bf-272c-4f18-a54c-d6a4bad16de6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32a24617e0b83f023304780397185eef703cdbd26842fbad821fea93a0f1f12f [2023-11-24 22:03:14,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:03:14,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:03:14,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:03:14,162 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:03:14,163 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:03:14,165 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i [2023-11-24 22:03:17,291 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:03:17,687 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:03:17,688 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i [2023-11-24 22:03:17,707 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/data/a621b00cf/5045ae9788de46d9ae441ad89fd4c2d4/FLAG9f15e9a64 [2023-11-24 22:03:17,723 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/data/a621b00cf/5045ae9788de46d9ae441ad89fd4c2d4 [2023-11-24 22:03:17,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:03:17,736 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:03:17,738 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:03:17,739 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:03:17,745 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:03:17,745 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:03:17" (1/1) ... [2023-11-24 22:03:17,747 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f7c0a2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:17, skipping insertion in model container [2023-11-24 22:03:17,747 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:03:17" (1/1) ... [2023-11-24 22:03:17,842 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:03:18,377 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_0e2520bf-272c-4f18-a54c-d6a4bad16de6/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[33021,33034] [2023-11-24 22:03:18,554 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_0e2520bf-272c-4f18-a54c-d6a4bad16de6/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44124,44137] [2023-11-24 22:03:18,555 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_0e2520bf-272c-4f18-a54c-d6a4bad16de6/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44245,44258] [2023-11-24 22:03:18,587 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:03:18,607 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:03:18,660 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_0e2520bf-272c-4f18-a54c-d6a4bad16de6/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[33021,33034] [2023-11-24 22:03:18,752 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_0e2520bf-272c-4f18-a54c-d6a4bad16de6/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44124,44137] [2023-11-24 22:03:18,753 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_0e2520bf-272c-4f18-a54c-d6a4bad16de6/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44245,44258] [2023-11-24 22:03:18,764 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:03:18,805 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:03:18,814 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:03:18,814 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:18 WrapperNode [2023-11-24 22:03:18,814 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:03:18,816 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:03:18,816 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:03:18,816 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:03:18,824 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:18" (1/1) ... [2023-11-24 22:03:18,878 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:18" (1/1) ... [2023-11-24 22:03:18,962 INFO L138 Inliner]: procedures = 176, calls = 328, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1494 [2023-11-24 22:03:18,962 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:03:18,963 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:03:18,963 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:03:18,963 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:03:18,976 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:18" (1/1) ... [2023-11-24 22:03:18,976 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:18" (1/1) ... [2023-11-24 22:03:18,997 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:18" (1/1) ... [2023-11-24 22:03:19,179 INFO L175 MemorySlicer]: Split 306 memory accesses to 4 slices as follows [2, 265, 5, 34]. 87 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 63 writes are split as follows [0, 58, 1, 4]. [2023-11-24 22:03:19,179 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:18" (1/1) ... [2023-11-24 22:03:19,180 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:18" (1/1) ... [2023-11-24 22:03:19,248 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:18" (1/1) ... [2023-11-24 22:03:19,276 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:18" (1/1) ... [2023-11-24 22:03:19,281 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:18" (1/1) ... [2023-11-24 22:03:19,302 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:18" (1/1) ... [2023-11-24 22:03:19,322 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:03:19,323 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:03:19,324 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:03:19,324 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:03:19,325 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:18" (1/1) ... [2023-11-24 22:03:19,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:03:19,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:19,369 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:03:19,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:03:19,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 22:03:19,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 22:03:19,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 22:03:19,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 22:03:19,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 22:03:19,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 22:03:19,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 22:03:19,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 22:03:19,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2023-11-24 22:03:19,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2023-11-24 22:03:19,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2023-11-24 22:03:19,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#3 [2023-11-24 22:03:19,428 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2023-11-24 22:03:19,428 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2023-11-24 22:03:19,428 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2023-11-24 22:03:19,428 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#3 [2023-11-24 22:03:19,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 22:03:19,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:03:19,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 22:03:19,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 22:03:19,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 22:03:19,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-24 22:03:19,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 22:03:19,430 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-24 22:03:19,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 22:03:19,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 22:03:19,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 22:03:19,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-24 22:03:19,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 22:03:19,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:03:19,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 22:03:19,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 22:03:19,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 22:03:19,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:03:19,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:03:19,746 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:03:19,749 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:03:21,460 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:03:21,526 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:03:21,527 INFO L309 CfgBuilder]: Removed 72 assume(true) statements. [2023-11-24 22:03:21,528 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:03:21 BoogieIcfgContainer [2023-11-24 22:03:21,528 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:03:21,532 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:03:21,532 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:03:21,535 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:03:21,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:03:17" (1/3) ... [2023-11-24 22:03:21,536 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d68ad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:03:21, skipping insertion in model container [2023-11-24 22:03:21,536 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:18" (2/3) ... [2023-11-24 22:03:21,538 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d68ad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:03:21, skipping insertion in model container [2023-11-24 22:03:21,538 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:03:21" (3/3) ... [2023-11-24 22:03:21,541 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test7-2.i [2023-11-24 22:03:21,560 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:03:21,560 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-24 22:03:21,636 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:03:21,643 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;@2445fbcd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:03:21,643 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-24 22:03:21,652 INFO L276 IsEmpty]: Start isEmpty. Operand has 382 states, 375 states have (on average 1.7066666666666668) internal successors, (640), 377 states have internal predecessors, (640), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 22:03:21,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-24 22:03:21,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:21,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:21,661 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:21,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:21,670 INFO L85 PathProgramCache]: Analyzing trace with hash -410107698, now seen corresponding path program 1 times [2023-11-24 22:03:21,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:21,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207674697] [2023-11-24 22:03:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:21,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:21,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:21,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207674697] [2023-11-24 22:03:21,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207674697] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:21,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:21,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:03:21,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110864062] [2023-11-24 22:03:21,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:21,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 22:03:21,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:21,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 22:03:21,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 22:03:21,911 INFO L87 Difference]: Start difference. First operand has 382 states, 375 states have (on average 1.7066666666666668) internal successors, (640), 377 states have internal predecessors, (640), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:21,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:21,989 INFO L93 Difference]: Finished difference Result 763 states and 1291 transitions. [2023-11-24 22:03:21,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 22:03:21,992 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-24 22:03:21,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:22,005 INFO L225 Difference]: With dead ends: 763 [2023-11-24 22:03:22,005 INFO L226 Difference]: Without dead ends: 347 [2023-11-24 22:03:22,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 22:03:22,014 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:22,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 564 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 22:03:22,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2023-11-24 22:03:22,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2023-11-24 22:03:22,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 341 states have (on average 1.5073313782991202) internal successors, (514), 342 states have internal predecessors, (514), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 22:03:22,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 520 transitions. [2023-11-24 22:03:22,079 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 520 transitions. Word has length 7 [2023-11-24 22:03:22,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:22,079 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 520 transitions. [2023-11-24 22:03:22,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:22,080 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 520 transitions. [2023-11-24 22:03:22,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 22:03:22,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:22,080 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:22,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:03:22,081 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:22,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:22,082 INFO L85 PathProgramCache]: Analyzing trace with hash 215756468, now seen corresponding path program 1 times [2023-11-24 22:03:22,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:22,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517493604] [2023-11-24 22:03:22,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:22,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:22,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:22,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517493604] [2023-11-24 22:03:22,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517493604] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:22,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:22,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:03:22,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731427584] [2023-11-24 22:03:22,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:22,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:03:22,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:22,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:03:22,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:03:22,310 INFO L87 Difference]: Start difference. First operand 347 states and 520 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:22,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:22,601 INFO L93 Difference]: Finished difference Result 859 states and 1290 transitions. [2023-11-24 22:03:22,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:03:22,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-24 22:03:22,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:22,611 INFO L225 Difference]: With dead ends: 859 [2023-11-24 22:03:22,612 INFO L226 Difference]: Without dead ends: 689 [2023-11-24 22:03:22,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:03:22,619 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 506 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 1573 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:22,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 1573 Invalid, 66 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:03:22,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2023-11-24 22:03:22,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 349. [2023-11-24 22:03:22,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 343 states have (on average 1.5043731778425655) internal successors, (516), 344 states have internal predecessors, (516), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 22:03:22,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 522 transitions. [2023-11-24 22:03:22,674 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 522 transitions. Word has length 9 [2023-11-24 22:03:22,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:22,675 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 522 transitions. [2023-11-24 22:03:22,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:22,675 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 522 transitions. [2023-11-24 22:03:22,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-24 22:03:22,688 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:22,688 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] [2023-11-24 22:03:22,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 22:03:22,688 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:22,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:22,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1438904312, now seen corresponding path program 1 times [2023-11-24 22:03:22,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:22,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122425334] [2023-11-24 22:03:22,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:22,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:22,781 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:03:22,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317245488] [2023-11-24 22:03:22,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:22,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:22,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:22,794 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:22,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 22:03:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:23,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:03:23,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:23,248 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:03:23,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:23,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122425334] [2023-11-24 22:03:23,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:03:23,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317245488] [2023-11-24 22:03:23,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317245488] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:23,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:23,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:03:23,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836786459] [2023-11-24 22:03:23,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:23,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:03:23,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:23,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:03:23,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:23,259 INFO L87 Difference]: Start difference. First operand 349 states and 522 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:23,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:23,364 INFO L93 Difference]: Finished difference Result 716 states and 1072 transitions. [2023-11-24 22:03:23,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:03:23,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2023-11-24 22:03:23,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:23,368 INFO L225 Difference]: With dead ends: 716 [2023-11-24 22:03:23,369 INFO L226 Difference]: Without dead ends: 370 [2023-11-24 22:03:23,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:23,374 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 9 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:23,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 982 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:03:23,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2023-11-24 22:03:23,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 369. [2023-11-24 22:03:23,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 363 states have (on average 1.4765840220385675) internal successors, (536), 364 states have internal predecessors, (536), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 22:03:23,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 542 transitions. [2023-11-24 22:03:23,389 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 542 transitions. Word has length 85 [2023-11-24 22:03:23,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:23,389 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 542 transitions. [2023-11-24 22:03:23,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:23,390 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 542 transitions. [2023-11-24 22:03:23,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-24 22:03:23,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:23,394 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] [2023-11-24 22:03:23,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:23,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:23,603 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:23,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:23,603 INFO L85 PathProgramCache]: Analyzing trace with hash -222750586, now seen corresponding path program 1 times [2023-11-24 22:03:23,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:23,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32454468] [2023-11-24 22:03:23,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:23,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:23,691 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:03:23,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032499416] [2023-11-24 22:03:23,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:23,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:23,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:23,695 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:23,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 22:03:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:24,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:03:24,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:24,132 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:03:24,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:24,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32454468] [2023-11-24 22:03:24,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:03:24,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032499416] [2023-11-24 22:03:24,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032499416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:24,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:24,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:03:24,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670237689] [2023-11-24 22:03:24,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:24,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:03:24,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:24,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:03:24,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:03:24,141 INFO L87 Difference]: Start difference. First operand 369 states and 542 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:24,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:24,248 INFO L93 Difference]: Finished difference Result 722 states and 1068 transitions. [2023-11-24 22:03:24,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:03:24,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2023-11-24 22:03:24,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:24,255 INFO L225 Difference]: With dead ends: 722 [2023-11-24 22:03:24,255 INFO L226 Difference]: Without dead ends: 356 [2023-11-24 22:03:24,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:03:24,260 INFO L413 NwaCegarLoop]: 491 mSDtfsCounter, 165 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:24,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1321 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:03:24,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2023-11-24 22:03:24,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 355. [2023-11-24 22:03:24,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 349 states have (on average 1.475644699140401) internal successors, (515), 350 states have internal predecessors, (515), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 22:03:24,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 521 transitions. [2023-11-24 22:03:24,272 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 521 transitions. Word has length 85 [2023-11-24 22:03:24,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:24,273 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 521 transitions. [2023-11-24 22:03:24,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:24,273 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 521 transitions. [2023-11-24 22:03:24,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-24 22:03:24,275 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:24,276 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] [2023-11-24 22:03:24,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:24,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:24,484 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:24,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:24,485 INFO L85 PathProgramCache]: Analyzing trace with hash -884428396, now seen corresponding path program 1 times [2023-11-24 22:03:24,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:24,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672066106] [2023-11-24 22:03:24,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:24,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:24,542 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:03:24,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091871973] [2023-11-24 22:03:24,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:24,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:24,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:24,545 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:24,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 22:03:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:24,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 22:03:24,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:25,191 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:03:25,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:25,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672066106] [2023-11-24 22:03:25,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:03:25,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091871973] [2023-11-24 22:03:25,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091871973] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:25,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:25,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:03:25,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374894000] [2023-11-24 22:03:25,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:25,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:03:25,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:25,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:03:25,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:25,194 INFO L87 Difference]: Start difference. First operand 355 states and 521 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:25,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:25,354 INFO L93 Difference]: Finished difference Result 972 states and 1441 transitions. [2023-11-24 22:03:25,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:03:25,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2023-11-24 22:03:25,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:25,360 INFO L225 Difference]: With dead ends: 972 [2023-11-24 22:03:25,360 INFO L226 Difference]: Without dead ends: 620 [2023-11-24 22:03:25,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:25,362 INFO L413 NwaCegarLoop]: 681 mSDtfsCounter, 344 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:25,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 1161 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:03:25,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2023-11-24 22:03:25,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 613. [2023-11-24 22:03:25,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 607 states have (on average 1.4991762767710048) internal successors, (910), 608 states have internal predecessors, (910), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 22:03:25,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 916 transitions. [2023-11-24 22:03:25,390 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 916 transitions. Word has length 85 [2023-11-24 22:03:25,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:25,390 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 916 transitions. [2023-11-24 22:03:25,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 916 transitions. [2023-11-24 22:03:25,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-24 22:03:25,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:25,393 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] [2023-11-24 22:03:25,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:25,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:25,605 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:25,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:25,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1977190934, now seen corresponding path program 1 times [2023-11-24 22:03:25,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:25,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263550590] [2023-11-24 22:03:25,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:25,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:25,681 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:03:25,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146398620] [2023-11-24 22:03:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:25,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:25,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:25,683 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:25,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 22:03:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:26,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 22:03:26,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:26,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 22:03:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 22:03:26,185 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:03:26,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:26,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263550590] [2023-11-24 22:03:26,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:03:26,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146398620] [2023-11-24 22:03:26,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146398620] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:26,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:26,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:03:26,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517901084] [2023-11-24 22:03:26,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:26,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:03:26,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:26,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:03:26,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:03:26,190 INFO L87 Difference]: Start difference. First operand 613 states and 916 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:26,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:26,334 INFO L93 Difference]: Finished difference Result 870 states and 1289 transitions. [2023-11-24 22:03:26,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:03:26,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 98 [2023-11-24 22:03:26,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:26,342 INFO L225 Difference]: With dead ends: 870 [2023-11-24 22:03:26,343 INFO L226 Difference]: Without dead ends: 866 [2023-11-24 22:03:26,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:03:26,344 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 492 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:26,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 1472 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:03:26,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2023-11-24 22:03:26,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 615. [2023-11-24 22:03:26,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 609 states have (on average 1.4975369458128078) internal successors, (912), 610 states have internal predecessors, (912), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 22:03:26,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 918 transitions. [2023-11-24 22:03:26,372 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 918 transitions. Word has length 98 [2023-11-24 22:03:26,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:26,373 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 918 transitions. [2023-11-24 22:03:26,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:26,373 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 918 transitions. [2023-11-24 22:03:26,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-24 22:03:26,380 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:26,381 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:26,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:26,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:26,587 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:26,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:26,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1454925300, now seen corresponding path program 1 times [2023-11-24 22:03:26,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:26,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114365863] [2023-11-24 22:03:26,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:26,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:26,656 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:03:26,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400311563] [2023-11-24 22:03:26,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:26,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:26,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:26,658 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:26,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 22:03:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:27,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:03:27,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 22:03:27,109 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:03:27,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:27,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114365863] [2023-11-24 22:03:27,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:03:27,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400311563] [2023-11-24 22:03:27,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400311563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:27,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:27,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:03:27,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788535294] [2023-11-24 22:03:27,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:27,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:03:27,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:27,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:03:27,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:27,122 INFO L87 Difference]: Start difference. First operand 615 states and 918 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:27,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:27,250 INFO L93 Difference]: Finished difference Result 967 states and 1453 transitions. [2023-11-24 22:03:27,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:03:27,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 152 [2023-11-24 22:03:27,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:27,264 INFO L225 Difference]: With dead ends: 967 [2023-11-24 22:03:27,268 INFO L226 Difference]: Without dead ends: 657 [2023-11-24 22:03:27,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:27,270 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 8 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:27,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 970 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:03:27,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2023-11-24 22:03:27,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 655. [2023-11-24 22:03:27,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 649 states have (on average 1.4668721109399077) internal successors, (952), 650 states have internal predecessors, (952), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 22:03:27,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 958 transitions. [2023-11-24 22:03:27,297 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 958 transitions. Word has length 152 [2023-11-24 22:03:27,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:27,297 INFO L495 AbstractCegarLoop]: Abstraction has 655 states and 958 transitions. [2023-11-24 22:03:27,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:27,298 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 958 transitions. [2023-11-24 22:03:27,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-24 22:03:27,300 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:27,300 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:27,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:27,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:27,508 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:27,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:27,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1810682698, now seen corresponding path program 1 times [2023-11-24 22:03:27,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:27,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729256624] [2023-11-24 22:03:27,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:27,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:27,585 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:03:27,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [466609935] [2023-11-24 22:03:27,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:27,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:27,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:27,587 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:27,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 22:03:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:28,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 22:03:28,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 22:03:28,074 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:03:28,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:28,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729256624] [2023-11-24 22:03:28,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:03:28,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466609935] [2023-11-24 22:03:28,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466609935] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:28,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:28,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 22:03:28,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405102172] [2023-11-24 22:03:28,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:28,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 22:03:28,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:28,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 22:03:28,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:03:28,077 INFO L87 Difference]: Start difference. First operand 655 states and 958 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:28,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:28,195 INFO L93 Difference]: Finished difference Result 979 states and 1445 transitions. [2023-11-24 22:03:28,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:03:28,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 152 [2023-11-24 22:03:28,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:28,200 INFO L225 Difference]: With dead ends: 979 [2023-11-24 22:03:28,201 INFO L226 Difference]: Without dead ends: 629 [2023-11-24 22:03:28,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:03:28,203 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 147 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 1772 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:28,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 1772 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:03:28,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2023-11-24 22:03:28,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 627. [2023-11-24 22:03:28,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 621 states have (on average 1.465378421900161) internal successors, (910), 622 states have internal predecessors, (910), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 22:03:28,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 916 transitions. [2023-11-24 22:03:28,228 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 916 transitions. Word has length 152 [2023-11-24 22:03:28,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:28,230 INFO L495 AbstractCegarLoop]: Abstraction has 627 states and 916 transitions. [2023-11-24 22:03:28,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:28,230 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 916 transitions. [2023-11-24 22:03:28,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-24 22:03:28,233 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:28,233 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:28,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:28,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-24 22:03:28,440 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:28,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:28,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1668231144, now seen corresponding path program 1 times [2023-11-24 22:03:28,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:28,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146705057] [2023-11-24 22:03:28,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:28,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:28,505 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:03:28,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782604541] [2023-11-24 22:03:28,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:28,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:28,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:28,507 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:28,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 22:03:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:28,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 22:03:28,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 22:03:29,048 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:03:29,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:29,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146705057] [2023-11-24 22:03:29,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:03:29,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782604541] [2023-11-24 22:03:29,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782604541] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:29,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:29,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:03:29,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197618196] [2023-11-24 22:03:29,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:29,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:03:29,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:29,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:03:29,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:03:29,052 INFO L87 Difference]: Start difference. First operand 627 states and 916 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:29,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:29,156 INFO L93 Difference]: Finished difference Result 859 states and 1237 transitions. [2023-11-24 22:03:29,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:03:29,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 152 [2023-11-24 22:03:29,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:29,161 INFO L225 Difference]: With dead ends: 859 [2023-11-24 22:03:29,161 INFO L226 Difference]: Without dead ends: 537 [2023-11-24 22:03:29,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:03:29,163 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 78 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:29,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1168 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:03:29,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2023-11-24 22:03:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2023-11-24 22:03:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 531 states have (on average 1.423728813559322) internal successors, (756), 532 states have internal predecessors, (756), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 22:03:29,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 762 transitions. [2023-11-24 22:03:29,184 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 762 transitions. Word has length 152 [2023-11-24 22:03:29,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:29,184 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 762 transitions. [2023-11-24 22:03:29,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:29,185 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 762 transitions. [2023-11-24 22:03:29,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-24 22:03:29,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:29,187 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:29,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:29,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-24 22:03:29,400 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:29,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:29,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1597376854, now seen corresponding path program 1 times [2023-11-24 22:03:29,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:29,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665508397] [2023-11-24 22:03:29,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:29,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:29,471 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:03:29,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735951510] [2023-11-24 22:03:29,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:29,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:29,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:29,473 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:29,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 22:03:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:29,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 22:03:29,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:03:30,226 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:03:30,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:30,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665508397] [2023-11-24 22:03:30,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:03:30,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735951510] [2023-11-24 22:03:30,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735951510] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:30,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:30,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:03:30,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859295034] [2023-11-24 22:03:30,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:30,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:03:30,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:30,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:03:30,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:03:30,230 INFO L87 Difference]: Start difference. First operand 537 states and 762 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:30,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:30,568 INFO L93 Difference]: Finished difference Result 1083 states and 1520 transitions. [2023-11-24 22:03:30,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:03:30,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 152 [2023-11-24 22:03:30,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:30,574 INFO L225 Difference]: With dead ends: 1083 [2023-11-24 22:03:30,574 INFO L226 Difference]: Without dead ends: 666 [2023-11-24 22:03:30,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:03:30,576 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 868 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:30,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [868 Valid, 904 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 22:03:30,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2023-11-24 22:03:30,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 659. [2023-11-24 22:03:30,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 653 states have (on average 1.4150076569678407) internal successors, (924), 654 states have internal predecessors, (924), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 22:03:30,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 930 transitions. [2023-11-24 22:03:30,609 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 930 transitions. Word has length 152 [2023-11-24 22:03:30,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:30,609 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 930 transitions. [2023-11-24 22:03:30,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:30,610 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 930 transitions. [2023-11-24 22:03:30,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-11-24 22:03:30,612 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:30,613 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:30,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:30,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 22:03:30,822 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:30,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:30,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1458586371, now seen corresponding path program 1 times [2023-11-24 22:03:30,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:30,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811038055] [2023-11-24 22:03:30,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:30,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:30,882 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:03:30,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271678445] [2023-11-24 22:03:30,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:30,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:30,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:30,884 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:30,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 22:03:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:31,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 22:03:31,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:31,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 22:03:31,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 22:03:31,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 22:03:31,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:03:31,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:03:31,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:31,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811038055] [2023-11-24 22:03:31,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:03:31,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271678445] [2023-11-24 22:03:31,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271678445] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:31,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:03:31,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-24 22:03:31,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042296419] [2023-11-24 22:03:31,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:31,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 22:03:31,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:31,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 22:03:31,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-24 22:03:31,982 INFO L87 Difference]: Start difference. First operand 659 states and 930 transitions. Second operand has 9 states, 9 states have (on average 26.88888888888889) internal successors, (242), 9 states have internal predecessors, (242), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-24 22:03:32,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:32,335 INFO L93 Difference]: Finished difference Result 2788 states and 3890 transitions. [2023-11-24 22:03:32,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 22:03:32,336 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 26.88888888888889) internal successors, (242), 9 states have internal predecessors, (242), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 162 [2023-11-24 22:03:32,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:32,351 INFO L225 Difference]: With dead ends: 2788 [2023-11-24 22:03:32,352 INFO L226 Difference]: Without dead ends: 2431 [2023-11-24 22:03:32,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 312 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-24 22:03:32,354 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 3066 mSDsluCounter, 2121 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3070 SdHoareTripleChecker+Valid, 2580 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:32,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3070 Valid, 2580 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 22:03:32,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2023-11-24 22:03:32,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1053. [2023-11-24 22:03:32,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1043 states have (on average 1.4228187919463087) internal successors, (1484), 1044 states have internal predecessors, (1484), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 22:03:32,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1496 transitions. [2023-11-24 22:03:32,430 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1496 transitions. Word has length 162 [2023-11-24 22:03:32,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:32,431 INFO L495 AbstractCegarLoop]: Abstraction has 1053 states and 1496 transitions. [2023-11-24 22:03:32,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 26.88888888888889) internal successors, (242), 9 states have internal predecessors, (242), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-24 22:03:32,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1496 transitions. [2023-11-24 22:03:32,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2023-11-24 22:03:32,440 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:32,440 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:32,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:32,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:32,650 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:32,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:32,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1206674077, now seen corresponding path program 1 times [2023-11-24 22:03:32,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:32,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861558152] [2023-11-24 22:03:32,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:32,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:32,903 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:03:32,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720599117] [2023-11-24 22:03:32,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:32,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:32,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:32,908 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:32,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 22:03:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:33,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 1862 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-24 22:03:33,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:33,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 22:03:34,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 22:03:34,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 22:03:34,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 22:03:34,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 22:03:34,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 22:03:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 458 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:03:34,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 458 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:03:35,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:35,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861558152] [2023-11-24 22:03:35,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:03:35,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720599117] [2023-11-24 22:03:35,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720599117] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:35,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:03:35,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-24 22:03:35,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737964960] [2023-11-24 22:03:35,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:35,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 22:03:35,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:35,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 22:03:35,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-24 22:03:35,310 INFO L87 Difference]: Start difference. First operand 1053 states and 1496 transitions. Second operand has 15 states, 15 states have (on average 46.53333333333333) internal successors, (698), 15 states have internal predecessors, (698), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-24 22:03:36,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:36,242 INFO L93 Difference]: Finished difference Result 5932 states and 8291 transitions. [2023-11-24 22:03:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-24 22:03:36,244 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 46.53333333333333) internal successors, (698), 15 states have internal predecessors, (698), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 390 [2023-11-24 22:03:36,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:36,275 INFO L225 Difference]: With dead ends: 5932 [2023-11-24 22:03:36,275 INFO L226 Difference]: Without dead ends: 5575 [2023-11-24 22:03:36,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 762 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2023-11-24 22:03:36,281 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 7420 mSDsluCounter, 5049 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7430 SdHoareTripleChecker+Valid, 5508 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:36,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7430 Valid, 5508 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 22:03:36,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5575 states. [2023-11-24 22:03:36,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5575 to 2073. [2023-11-24 22:03:36,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2073 states, 2057 states have (on average 1.4360719494409333) internal successors, (2954), 2058 states have internal predecessors, (2954), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 22:03:36,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 2978 transitions. [2023-11-24 22:03:36,426 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 2978 transitions. Word has length 390 [2023-11-24 22:03:36,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:36,427 INFO L495 AbstractCegarLoop]: Abstraction has 2073 states and 2978 transitions. [2023-11-24 22:03:36,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 46.53333333333333) internal successors, (698), 15 states have internal predecessors, (698), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-24 22:03:36,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 2978 transitions. [2023-11-24 22:03:36,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 847 [2023-11-24 22:03:36,458 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:36,458 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:36,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:36,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:36,670 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:36,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:36,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1892269533, now seen corresponding path program 2 times [2023-11-24 22:03:36,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:36,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244286982] [2023-11-24 22:03:36,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:36,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:37,047 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:03:37,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240501994] [2023-11-24 22:03:37,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 22:03:37,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:37,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:37,049 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:37,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 22:03:38,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-24 22:03:38,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:03:38,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-24 22:03:38,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:39,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 22:03:40,010 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 22:03:40,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 23 [2023-11-24 22:03:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3425 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3425 trivial. 0 not checked. [2023-11-24 22:03:40,231 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:03:40,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:40,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244286982] [2023-11-24 22:03:40,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:03:40,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240501994] [2023-11-24 22:03:40,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240501994] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:40,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:40,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-24 22:03:40,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662022140] [2023-11-24 22:03:40,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:40,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 22:03:40,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:40,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 22:03:40,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-24 22:03:40,236 INFO L87 Difference]: Start difference. First operand 2073 states and 2978 transitions. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:41,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:41,386 INFO L93 Difference]: Finished difference Result 2575 states and 3663 transitions. [2023-11-24 22:03:41,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 22:03:41,387 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 846 [2023-11-24 22:03:41,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:41,401 INFO L225 Difference]: With dead ends: 2575 [2023-11-24 22:03:41,401 INFO L226 Difference]: Without dead ends: 2221 [2023-11-24 22:03:41,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 851 GetRequests, 836 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-11-24 22:03:41,403 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 754 mSDsluCounter, 2772 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 3228 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:41,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 3228 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 22:03:41,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2023-11-24 22:03:41,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 2102. [2023-11-24 22:03:41,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 2086 states have (on average 1.4300095877277086) internal successors, (2983), 2087 states have internal predecessors, (2983), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 22:03:41,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 3007 transitions. [2023-11-24 22:03:41,504 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 3007 transitions. Word has length 846 [2023-11-24 22:03:41,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:41,505 INFO L495 AbstractCegarLoop]: Abstraction has 2102 states and 3007 transitions. [2023-11-24 22:03:41,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:41,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 3007 transitions. [2023-11-24 22:03:41,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 848 [2023-11-24 22:03:41,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:41,540 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:41,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:41,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-24 22:03:41,756 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:41,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:41,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1335121147, now seen corresponding path program 1 times [2023-11-24 22:03:41,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:41,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019861283] [2023-11-24 22:03:41,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:41,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:42,168 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:03:42,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877583192] [2023-11-24 22:03:42,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:42,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:42,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:42,170 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:42,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-24 22:03:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:44,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 4077 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-24 22:03:44,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:44,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 22:03:44,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 22:03:44,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 22:03:44,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 22:03:44,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 22:03:45,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 22:03:45,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 22:03:45,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 22:03:45,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 22:03:45,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 22:03:45,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 22:03:45,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 22:03:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3425 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:03:45,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3425 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:03:47,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:47,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019861283] [2023-11-24 22:03:47,475 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:03:47,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877583192] [2023-11-24 22:03:47,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877583192] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:47,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:03:47,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2023-11-24 22:03:47,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697685404] [2023-11-24 22:03:47,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:47,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-24 22:03:47,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:47,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-24 22:03:47,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2023-11-24 22:03:47,485 INFO L87 Difference]: Start difference. First operand 2102 states and 3007 transitions. Second operand has 27 states, 27 states have (on average 59.666666666666664) internal successors, (1611), 27 states have internal predecessors, (1611), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-24 22:03:50,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:50,293 INFO L93 Difference]: Finished difference Result 12249 states and 17121 transitions. [2023-11-24 22:03:50,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-24 22:03:50,295 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 59.666666666666664) internal successors, (1611), 27 states have internal predecessors, (1611), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 847 [2023-11-24 22:03:50,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:50,357 INFO L225 Difference]: With dead ends: 12249 [2023-11-24 22:03:50,357 INFO L226 Difference]: Without dead ends: 11863 [2023-11-24 22:03:50,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1714 GetRequests, 1664 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=846, Invalid=1506, Unknown=0, NotChecked=0, Total=2352 [2023-11-24 22:03:50,362 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 24585 mSDsluCounter, 9672 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24607 SdHoareTripleChecker+Valid, 10131 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:50,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24607 Valid, 10131 Invalid, 411 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [93 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 22:03:50,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11863 states. [2023-11-24 22:03:50,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11863 to 4142. [2023-11-24 22:03:50,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4142 states, 4114 states have (on average 1.4397180359747204) internal successors, (5923), 4115 states have internal predecessors, (5923), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-24 22:03:50,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4142 states to 4142 states and 5971 transitions. [2023-11-24 22:03:50,615 INFO L78 Accepts]: Start accepts. Automaton has 4142 states and 5971 transitions. Word has length 847 [2023-11-24 22:03:50,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:50,617 INFO L495 AbstractCegarLoop]: Abstraction has 4142 states and 5971 transitions. [2023-11-24 22:03:50,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 59.666666666666664) internal successors, (1611), 27 states have internal predecessors, (1611), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-24 22:03:50,618 INFO L276 IsEmpty]: Start isEmpty. Operand 4142 states and 5971 transitions. [2023-11-24 22:03:50,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1760 [2023-11-24 22:03:50,654 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:50,655 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:50,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:50,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-24 22:03:50,873 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:50,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:50,874 INFO L85 PathProgramCache]: Analyzing trace with hash 222834299, now seen corresponding path program 2 times [2023-11-24 22:03:50,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:50,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991355163] [2023-11-24 22:03:50,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:50,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:51,677 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:03:51,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1334497710] [2023-11-24 22:03:51,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 22:03:51,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:51,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:51,680 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:51,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e2520bf-272c-4f18-a54c-d6a4bad16de6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-24 22:03:53,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-24 22:03:53,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:03:53,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-24 22:03:53,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:53,972 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 22:03:53,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 22 [2023-11-24 22:04:07,503 WARN L293 SmtUtils]: Spent 8.10s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)