./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5f094e7ea34d2025ab25ab51a4a0b06d8f845826c76dbd06e91f3d4a761fa19b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:52:21,328 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:52:21,390 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:52:21,394 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:52:21,395 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:52:21,418 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:52:21,419 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:52:21,419 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:52:21,420 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:52:21,421 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:52:21,421 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:52:21,422 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:52:21,422 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:52:21,423 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:52:21,423 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:52:21,424 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:52:21,425 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:52:21,425 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:52:21,425 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:52:21,426 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:52:21,426 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:52:21,427 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:52:21,427 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:52:21,428 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:52:21,428 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:52:21,428 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:52:21,429 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:52:21,429 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:52:21,429 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:52:21,430 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:52:21,430 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:52:21,430 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:52:21,431 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:52:21,431 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:52:21,431 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:52:21,431 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:52:21,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:52:21,432 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:52:21,432 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:52:21,432 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:52:21,432 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:52:21,433 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:52:21,433 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5f094e7ea34d2025ab25ab51a4a0b06d8f845826c76dbd06e91f3d4a761fa19b [2023-11-29 06:52:21,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:52:21,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:52:21,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:52:21,687 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:52:21,688 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:52:21,689 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound5.c [2023-11-29 06:52:24,461 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:52:24,636 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:52:24,637 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound5.c [2023-11-29 06:52:24,644 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/data/4c925d772/00754d3f519a4f92b4a5aac6b6998df2/FLAGb9cdd4194 [2023-11-29 06:52:24,658 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/data/4c925d772/00754d3f519a4f92b4a5aac6b6998df2 [2023-11-29 06:52:24,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:52:24,662 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:52:24,663 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:52:24,664 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:52:24,668 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:52:24,668 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:52:24" (1/1) ... [2023-11-29 06:52:24,669 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@798b6242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:24, skipping insertion in model container [2023-11-29 06:52:24,670 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:52:24" (1/1) ... [2023-11-29 06:52:24,692 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:52:24,826 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_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound5.c[526,539] [2023-11-29 06:52:24,843 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:52:24,853 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:52:24,867 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_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound5.c[526,539] [2023-11-29 06:52:24,874 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:52:24,889 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:52:24,889 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:24 WrapperNode [2023-11-29 06:52:24,889 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:52:24,890 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:52:24,891 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:52:24,891 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:52:24,898 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:24" (1/1) ... [2023-11-29 06:52:24,905 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:24" (1/1) ... [2023-11-29 06:52:24,923 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-11-29 06:52:24,923 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:52:24,924 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:52:24,924 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:52:24,924 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:52:24,935 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:24" (1/1) ... [2023-11-29 06:52:24,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:24" (1/1) ... [2023-11-29 06:52:24,936 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:24" (1/1) ... [2023-11-29 06:52:24,945 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2023-11-29 06:52:24,946 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:24" (1/1) ... [2023-11-29 06:52:24,946 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:24" (1/1) ... [2023-11-29 06:52:24,950 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:24" (1/1) ... [2023-11-29 06:52:24,953 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:24" (1/1) ... [2023-11-29 06:52:24,954 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:24" (1/1) ... [2023-11-29 06:52:24,955 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:24" (1/1) ... [2023-11-29 06:52:24,957 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:52:24,958 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:52:24,958 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:52:24,958 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:52:24,959 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:24" (1/1) ... [2023-11-29 06:52:24,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:52:24,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:24,989 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:52:24,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:52:25,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:52:25,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:52:25,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:52:25,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:52:25,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:52:25,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 06:52:25,018 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 06:52:25,077 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:52:25,079 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:52:25,218 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:52:25,243 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:52:25,244 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 06:52:25,244 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:52:25 BoogieIcfgContainer [2023-11-29 06:52:25,244 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:52:25,247 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:52:25,248 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:52:25,251 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:52:25,251 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:52:24" (1/3) ... [2023-11-29 06:52:25,252 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be927dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:52:25, skipping insertion in model container [2023-11-29 06:52:25,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:24" (2/3) ... [2023-11-29 06:52:25,252 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be927dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:52:25, skipping insertion in model container [2023-11-29 06:52:25,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:52:25" (3/3) ... [2023-11-29 06:52:25,254 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound5.c [2023-11-29 06:52:25,273 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:52:25,273 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:52:25,320 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:52:25,326 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;@200f7ff2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:52:25,327 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 06:52:25,331 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 06:52:25,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 06:52:25,338 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:25,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:25,339 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:25,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:25,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1291730102, now seen corresponding path program 1 times [2023-11-29 06:52:25,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:25,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165331376] [2023-11-29 06:52:25,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:25,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:25,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:25,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165331376] [2023-11-29 06:52:25,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 06:52:25,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032856904] [2023-11-29 06:52:25,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:25,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:25,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:25,460 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:25,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:52:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:25,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 06:52:25,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:52:25,539 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:52:25,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032856904] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:52:25,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:52:25,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:52:25,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225730503] [2023-11-29 06:52:25,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:52:25,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 06:52:25,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:25,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 06:52:25,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:52:25,568 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:25,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:25,613 INFO L93 Difference]: Finished difference Result 45 states and 78 transitions. [2023-11-29 06:52:25,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 06:52:25,615 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-29 06:52:25,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:25,620 INFO L225 Difference]: With dead ends: 45 [2023-11-29 06:52:25,621 INFO L226 Difference]: Without dead ends: 21 [2023-11-29 06:52:25,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:52:25,626 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:25,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:52:25,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-29 06:52:25,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-29 06:52:25,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 06:52:25,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 31 transitions. [2023-11-29 06:52:25,654 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 31 transitions. Word has length 7 [2023-11-29 06:52:25,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:25,654 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 31 transitions. [2023-11-29 06:52:25,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:25,655 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 31 transitions. [2023-11-29 06:52:25,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 06:52:25,655 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:25,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:25,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:52:25,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 06:52:25,861 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:25,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:25,862 INFO L85 PathProgramCache]: Analyzing trace with hash 829671692, now seen corresponding path program 1 times [2023-11-29 06:52:25,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:25,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116868380] [2023-11-29 06:52:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:25,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:26,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:52:26,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:26,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116868380] [2023-11-29 06:52:26,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116868380] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:52:26,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:52:26,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:52:26,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626563306] [2023-11-29 06:52:26,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:52:26,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:52:26,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:26,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:52:26,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:52:26,005 INFO L87 Difference]: Start difference. First operand 21 states and 31 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:26,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:26,060 INFO L93 Difference]: Finished difference Result 35 states and 50 transitions. [2023-11-29 06:52:26,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:52:26,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-29 06:52:26,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:26,062 INFO L225 Difference]: With dead ends: 35 [2023-11-29 06:52:26,062 INFO L226 Difference]: Without dead ends: 33 [2023-11-29 06:52:26,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:52:26,064 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:26,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 89 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:52:26,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-29 06:52:26,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2023-11-29 06:52:26,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 06:52:26,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2023-11-29 06:52:26,075 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 7 [2023-11-29 06:52:26,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:26,076 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2023-11-29 06:52:26,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:26,076 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2023-11-29 06:52:26,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 06:52:26,077 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:26,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:26,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 06:52:26,077 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:26,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:26,078 INFO L85 PathProgramCache]: Analyzing trace with hash -166824855, now seen corresponding path program 1 times [2023-11-29 06:52:26,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:26,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924377921] [2023-11-29 06:52:26,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:26,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:26,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:26,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:26,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924377921] [2023-11-29 06:52:26,098 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 06:52:26,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411332553] [2023-11-29 06:52:26,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:26,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:26,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:26,100 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:26,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:52:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:26,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 06:52:26,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:52:26,182 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:52:26,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411332553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:52:26,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:52:26,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:52:26,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942277183] [2023-11-29 06:52:26,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:52:26,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:52:26,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:26,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:52:26,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:52:26,185 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:26,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:26,203 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2023-11-29 06:52:26,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:52:26,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-29 06:52:26,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:26,204 INFO L225 Difference]: With dead ends: 41 [2023-11-29 06:52:26,204 INFO L226 Difference]: Without dead ends: 27 [2023-11-29 06:52:26,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:52:26,207 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:26,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:52:26,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-29 06:52:26,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-29 06:52:26,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 06:52:26,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2023-11-29 06:52:26,214 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 9 [2023-11-29 06:52:26,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:26,215 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2023-11-29 06:52:26,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:26,215 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2023-11-29 06:52:26,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 06:52:26,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:26,216 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:26,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:52:26,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:26,421 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:26,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:26,421 INFO L85 PathProgramCache]: Analyzing trace with hash -439138420, now seen corresponding path program 1 times [2023-11-29 06:52:26,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:26,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448904132] [2023-11-29 06:52:26,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:26,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:26,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 06:52:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:26,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:52:26,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:26,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448904132] [2023-11-29 06:52:26,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448904132] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:52:26,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:52:26,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:52:26,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060341180] [2023-11-29 06:52:26,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:52:26,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:52:26,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:26,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:52:26,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:52:26,521 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:52:26,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:26,570 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2023-11-29 06:52:26,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:52:26,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-29 06:52:26,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:26,572 INFO L225 Difference]: With dead ends: 41 [2023-11-29 06:52:26,572 INFO L226 Difference]: Without dead ends: 39 [2023-11-29 06:52:26,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:52:26,574 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:26,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 85 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:52:26,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-29 06:52:26,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2023-11-29 06:52:26,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 06:52:26,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2023-11-29 06:52:26,583 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 12 [2023-11-29 06:52:26,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:26,584 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2023-11-29 06:52:26,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:52:26,584 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2023-11-29 06:52:26,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 06:52:26,585 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:26,585 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:26,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 06:52:26,585 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:26,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:26,586 INFO L85 PathProgramCache]: Analyzing trace with hash -235147060, now seen corresponding path program 1 times [2023-11-29 06:52:26,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:26,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27436162] [2023-11-29 06:52:26,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:26,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:26,598 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:52:26,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001102210] [2023-11-29 06:52:26,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:26,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:26,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:26,605 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:26,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:52:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:26,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 06:52:26,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:52:26,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:52:26,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:26,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27436162] [2023-11-29 06:52:26,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:52:26,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001102210] [2023-11-29 06:52:26,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001102210] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:26,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:52:26,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-11-29 06:52:26,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887000242] [2023-11-29 06:52:26,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:26,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:52:26,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:26,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:52:26,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:52:26,904 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 06:52:27,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:27,230 INFO L93 Difference]: Finished difference Result 70 states and 95 transitions. [2023-11-29 06:52:27,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:52:27,231 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 17 [2023-11-29 06:52:27,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:27,233 INFO L225 Difference]: With dead ends: 70 [2023-11-29 06:52:27,234 INFO L226 Difference]: Without dead ends: 55 [2023-11-29 06:52:27,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:52:27,236 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:27,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 74 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:52:27,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-29 06:52:27,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2023-11-29 06:52:27,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 32 states have (on average 1.28125) internal successors, (41), 35 states have internal predecessors, (41), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 06:52:27,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2023-11-29 06:52:27,252 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 17 [2023-11-29 06:52:27,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:27,252 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2023-11-29 06:52:27,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 06:52:27,252 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2023-11-29 06:52:27,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 06:52:27,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:27,253 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:27,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:52:27,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:27,454 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:27,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:27,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2012527405, now seen corresponding path program 1 times [2023-11-29 06:52:27,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:27,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116229265] [2023-11-29 06:52:27,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:27,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:27,465 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:52:27,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860439012] [2023-11-29 06:52:27,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:27,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:27,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:27,467 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:27,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:52:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:27,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 06:52:27,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:27,635 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 06:52:27,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:27,801 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 06:52:27,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:27,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116229265] [2023-11-29 06:52:27,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:52:27,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860439012] [2023-11-29 06:52:27,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860439012] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:27,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:52:27,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-11-29 06:52:27,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061352218] [2023-11-29 06:52:27,803 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:27,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:52:27,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:27,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:52:27,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:52:27,804 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 06:52:27,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:27,969 INFO L93 Difference]: Finished difference Result 72 states and 96 transitions. [2023-11-29 06:52:27,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:52:27,969 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 25 [2023-11-29 06:52:27,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:27,971 INFO L225 Difference]: With dead ends: 72 [2023-11-29 06:52:27,971 INFO L226 Difference]: Without dead ends: 64 [2023-11-29 06:52:27,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:52:27,973 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:27,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 117 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:52:27,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-29 06:52:27,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2023-11-29 06:52:27,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 42 states have internal predecessors, (49), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-29 06:52:27,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2023-11-29 06:52:27,988 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 25 [2023-11-29 06:52:27,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:27,989 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2023-11-29 06:52:27,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 06:52:27,989 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2023-11-29 06:52:27,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 06:52:27,990 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:27,990 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:27,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:52:28,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 06:52:28,196 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:28,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:28,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2049051340, now seen corresponding path program 1 times [2023-11-29 06:52:28,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:28,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803538235] [2023-11-29 06:52:28,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:28,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:28,203 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:52:28,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1421486103] [2023-11-29 06:52:28,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:28,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:28,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:28,205 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:28,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:52:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:28,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:52:28,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 06:52:28,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:28,340 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 06:52:28,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:28,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803538235] [2023-11-29 06:52:28,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:52:28,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421486103] [2023-11-29 06:52:28,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421486103] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:28,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:52:28,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-11-29 06:52:28,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976271508] [2023-11-29 06:52:28,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:28,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:52:28,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:28,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:52:28,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:52:28,343 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-29 06:52:28,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:28,469 INFO L93 Difference]: Finished difference Result 164 states and 204 transitions. [2023-11-29 06:52:28,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:52:28,470 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 32 [2023-11-29 06:52:28,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:28,471 INFO L225 Difference]: With dead ends: 164 [2023-11-29 06:52:28,472 INFO L226 Difference]: Without dead ends: 126 [2023-11-29 06:52:28,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:52:28,473 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:28,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 138 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:52:28,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-29 06:52:28,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2023-11-29 06:52:28,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 78 states have (on average 1.1923076923076923) internal successors, (93), 82 states have internal predecessors, (93), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-29 06:52:28,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 143 transitions. [2023-11-29 06:52:28,498 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 143 transitions. Word has length 32 [2023-11-29 06:52:28,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:28,499 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 143 transitions. [2023-11-29 06:52:28,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-29 06:52:28,499 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 143 transitions. [2023-11-29 06:52:28,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-29 06:52:28,501 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:28,501 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:28,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:52:28,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 06:52:28,707 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:28,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:28,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1125945480, now seen corresponding path program 1 times [2023-11-29 06:52:28,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:28,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421322031] [2023-11-29 06:52:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:28,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:28,724 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:52:28,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199035462] [2023-11-29 06:52:28,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:28,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:28,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:28,726 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:28,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:52:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:28,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:52:28,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 06:52:28,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-29 06:52:28,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:28,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421322031] [2023-11-29 06:52:28,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:52:28,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199035462] [2023-11-29 06:52:28,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199035462] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:28,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:52:28,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2023-11-29 06:52:28,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678629951] [2023-11-29 06:52:28,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:28,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:52:28,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:28,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:52:28,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:52:28,929 INFO L87 Difference]: Start difference. First operand 120 states and 143 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-11-29 06:52:29,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:29,057 INFO L93 Difference]: Finished difference Result 198 states and 239 transitions. [2023-11-29 06:52:29,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:52:29,058 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 48 [2023-11-29 06:52:29,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:29,060 INFO L225 Difference]: With dead ends: 198 [2023-11-29 06:52:29,060 INFO L226 Difference]: Without dead ends: 177 [2023-11-29 06:52:29,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:52:29,061 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 43 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:29,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 176 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:52:29,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-11-29 06:52:29,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 172. [2023-11-29 06:52:29,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 120 states have internal predecessors, (134), 38 states have call successors, (38), 21 states have call predecessors, (38), 20 states have return successors, (35), 30 states have call predecessors, (35), 35 states have call successors, (35) [2023-11-29 06:52:29,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 207 transitions. [2023-11-29 06:52:29,092 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 207 transitions. Word has length 48 [2023-11-29 06:52:29,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:29,093 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 207 transitions. [2023-11-29 06:52:29,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-11-29 06:52:29,093 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 207 transitions. [2023-11-29 06:52:29,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-29 06:52:29,095 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:29,095 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:29,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:52:29,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:29,297 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:29,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:29,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1450073182, now seen corresponding path program 1 times [2023-11-29 06:52:29,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:29,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715335460] [2023-11-29 06:52:29,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:29,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:29,304 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:52:29,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978806807] [2023-11-29 06:52:29,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:29,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:29,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:29,306 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:29,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:52:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:29,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 06:52:29,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:29,725 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-29 06:52:29,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-29 06:52:31,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:31,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715335460] [2023-11-29 06:52:31,396 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:52:31,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978806807] [2023-11-29 06:52:31,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978806807] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:31,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:52:31,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-29 06:52:31,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051201854] [2023-11-29 06:52:31,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:31,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:52:31,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:31,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:52:31,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:52:31,399 INFO L87 Difference]: Start difference. First operand 172 states and 207 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-29 06:52:44,586 WARN L293 SmtUtils]: Spent 13.04s on a formula simplification. DAG size of input: 50 DAG size of output: 48 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 06:52:45,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:45,967 INFO L93 Difference]: Finished difference Result 266 states and 339 transitions. [2023-11-29 06:52:45,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 06:52:45,968 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 57 [2023-11-29 06:52:45,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:45,971 INFO L225 Difference]: With dead ends: 266 [2023-11-29 06:52:45,971 INFO L226 Difference]: Without dead ends: 218 [2023-11-29 06:52:45,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:52:45,973 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 59 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:45,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 267 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 06:52:45,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-11-29 06:52:46,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 207. [2023-11-29 06:52:46,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 139 states have (on average 1.2158273381294964) internal successors, (169), 147 states have internal predecessors, (169), 43 states have call successors, (43), 24 states have call predecessors, (43), 24 states have return successors, (41), 35 states have call predecessors, (41), 41 states have call successors, (41) [2023-11-29 06:52:46,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 253 transitions. [2023-11-29 06:52:46,036 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 253 transitions. Word has length 57 [2023-11-29 06:52:46,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:46,037 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 253 transitions. [2023-11-29 06:52:46,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-29 06:52:46,037 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 253 transitions. [2023-11-29 06:52:46,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 06:52:46,039 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:46,039 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:46,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:52:46,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:46,241 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:46,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:46,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1715906499, now seen corresponding path program 1 times [2023-11-29 06:52:46,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:46,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980115357] [2023-11-29 06:52:46,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:46,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:46,250 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:52:46,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229447864] [2023-11-29 06:52:46,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:46,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:46,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:46,252 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:46,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:52:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:46,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 06:52:46,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:46,593 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-29 06:52:46,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-29 06:52:47,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:47,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980115357] [2023-11-29 06:52:47,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:52:47,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229447864] [2023-11-29 06:52:47,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229447864] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:47,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:52:47,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-11-29 06:52:47,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057715512] [2023-11-29 06:52:47,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:47,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:52:47,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:47,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:52:47,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:52:47,209 INFO L87 Difference]: Start difference. First operand 207 states and 253 transitions. Second operand has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 15 states have internal predecessors, (41), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2023-11-29 06:52:49,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 06:52:50,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:50,115 INFO L93 Difference]: Finished difference Result 259 states and 321 transitions. [2023-11-29 06:52:50,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:52:50,116 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 15 states have internal predecessors, (41), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) Word has length 68 [2023-11-29 06:52:50,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:50,118 INFO L225 Difference]: With dead ends: 259 [2023-11-29 06:52:50,118 INFO L226 Difference]: Without dead ends: 208 [2023-11-29 06:52:50,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:52:50,120 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 32 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:50,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 242 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-29 06:52:50,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-11-29 06:52:50,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 185. [2023-11-29 06:52:50,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 124 states have (on average 1.1693548387096775) internal successors, (145), 128 states have internal predecessors, (145), 37 states have call successors, (37), 24 states have call predecessors, (37), 23 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2023-11-29 06:52:50,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 217 transitions. [2023-11-29 06:52:50,160 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 217 transitions. Word has length 68 [2023-11-29 06:52:50,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:50,160 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 217 transitions. [2023-11-29 06:52:50,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 15 states have internal predecessors, (41), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2023-11-29 06:52:50,161 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 217 transitions. [2023-11-29 06:52:50,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-29 06:52:50,162 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:50,162 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:50,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:52:50,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 06:52:50,363 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:50,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:50,364 INFO L85 PathProgramCache]: Analyzing trace with hash 970851771, now seen corresponding path program 1 times [2023-11-29 06:52:50,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:50,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771451170] [2023-11-29 06:52:50,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:50,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:50,371 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:52:50,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584536390] [2023-11-29 06:52:50,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:50,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:50,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:50,372 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:50,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:52:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:50,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 06:52:50,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:50,590 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-29 06:52:50,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:51,001 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-29 06:52:51,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:51,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771451170] [2023-11-29 06:52:51,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:52:51,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584536390] [2023-11-29 06:52:51,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584536390] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:51,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:52:51,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 06:52:51,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998037375] [2023-11-29 06:52:51,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:51,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:52:51,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:51,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:52:51,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:52:51,004 INFO L87 Difference]: Start difference. First operand 185 states and 217 transitions. Second operand has 12 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-29 06:52:51,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:51,326 INFO L93 Difference]: Finished difference Result 212 states and 249 transitions. [2023-11-29 06:52:51,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:52:51,327 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 73 [2023-11-29 06:52:51,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:51,329 INFO L225 Difference]: With dead ends: 212 [2023-11-29 06:52:51,329 INFO L226 Difference]: Without dead ends: 167 [2023-11-29 06:52:51,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:52:51,330 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 16 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:51,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 222 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:52:51,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-29 06:52:51,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 159. [2023-11-29 06:52:51,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 107 states have (on average 1.158878504672897) internal successors, (124), 110 states have internal predecessors, (124), 31 states have call successors, (31), 20 states have call predecessors, (31), 20 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-29 06:52:51,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 185 transitions. [2023-11-29 06:52:51,374 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 185 transitions. Word has length 73 [2023-11-29 06:52:51,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:51,374 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 185 transitions. [2023-11-29 06:52:51,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-29 06:52:51,375 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 185 transitions. [2023-11-29 06:52:51,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-29 06:52:51,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:51,376 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:51,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:52:51,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:51,577 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:51,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:51,577 INFO L85 PathProgramCache]: Analyzing trace with hash -501231567, now seen corresponding path program 2 times [2023-11-29 06:52:51,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:51,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53968464] [2023-11-29 06:52:51,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:51,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:51,584 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:52:51,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920954220] [2023-11-29 06:52:51,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:52:51,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:51,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:51,585 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:51,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:52:51,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:52:51,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:52:51,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 06:52:51,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 06:52:51,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 06:52:51,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:51,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53968464] [2023-11-29 06:52:51,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:52:51,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920954220] [2023-11-29 06:52:51,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920954220] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:51,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:52:51,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2023-11-29 06:52:51,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354287132] [2023-11-29 06:52:51,848 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:51,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:52:51,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:51,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:52:51,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:52:51,850 INFO L87 Difference]: Start difference. First operand 159 states and 185 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 5 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2023-11-29 06:52:51,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:51,974 INFO L93 Difference]: Finished difference Result 217 states and 263 transitions. [2023-11-29 06:52:51,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 06:52:51,976 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 5 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 86 [2023-11-29 06:52:51,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:51,977 INFO L225 Difference]: With dead ends: 217 [2023-11-29 06:52:51,977 INFO L226 Difference]: Without dead ends: 161 [2023-11-29 06:52:51,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 158 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:52:51,978 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:51,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 114 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:52:51,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-11-29 06:52:52,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2023-11-29 06:52:52,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 112 states have internal predecessors, (126), 31 states have call successors, (31), 20 states have call predecessors, (31), 20 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-29 06:52:52,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 187 transitions. [2023-11-29 06:52:52,030 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 187 transitions. Word has length 86 [2023-11-29 06:52:52,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:52,030 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 187 transitions. [2023-11-29 06:52:52,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 5 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2023-11-29 06:52:52,031 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 187 transitions. [2023-11-29 06:52:52,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-29 06:52:52,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:52,032 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-29 06:52:52,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 06:52:52,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:52,233 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:52,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:52,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1153550505, now seen corresponding path program 2 times [2023-11-29 06:52:52,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:52,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423946634] [2023-11-29 06:52:52,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:52,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:52,241 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:52:52,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699233518] [2023-11-29 06:52:52,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:52:52,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:52,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:52,242 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:52,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:52:52,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:52:52,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:52:52,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 06:52:52,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:52,419 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 322 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 06:52:52,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 06:52:52,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:52,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423946634] [2023-11-29 06:52:52,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:52:52,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699233518] [2023-11-29 06:52:52,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699233518] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:52,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:52:52,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2023-11-29 06:52:52,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957049326] [2023-11-29 06:52:52,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:52,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:52:52,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:52,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:52:52,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:52:52,519 INFO L87 Difference]: Start difference. First operand 161 states and 187 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 6 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2023-11-29 06:52:52,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:52,640 INFO L93 Difference]: Finished difference Result 208 states and 245 transitions. [2023-11-29 06:52:52,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:52:52,641 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 6 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 89 [2023-11-29 06:52:52,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:52,642 INFO L225 Difference]: With dead ends: 208 [2023-11-29 06:52:52,642 INFO L226 Difference]: Without dead ends: 154 [2023-11-29 06:52:52,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 163 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:52:52,643 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 37 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:52,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 189 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:52:52,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-29 06:52:52,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 144. [2023-11-29 06:52:52,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 100 states have internal predecessors, (105), 26 states have call successors, (26), 20 states have call predecessors, (26), 20 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-29 06:52:52,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 156 transitions. [2023-11-29 06:52:52,681 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 156 transitions. Word has length 89 [2023-11-29 06:52:52,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:52,682 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 156 transitions. [2023-11-29 06:52:52,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 6 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2023-11-29 06:52:52,682 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 156 transitions. [2023-11-29 06:52:52,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-29 06:52:52,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:52,683 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:52,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:52:52,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:52,884 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:52,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:52,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1155278383, now seen corresponding path program 1 times [2023-11-29 06:52:52,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:52,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78217724] [2023-11-29 06:52:52,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:52,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:52,893 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:52:52,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637352700] [2023-11-29 06:52:52,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:52,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:52,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:52,895 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:52,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:52:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:52,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 06:52:52,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 25 proven. 65 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-29 06:52:53,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:54:32,586 WARN L293 SmtUtils]: Spent 6.19s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:55:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 25 proven. 65 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-29 06:55:04,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:04,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78217724] [2023-11-29 06:55:04,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:55:04,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637352700] [2023-11-29 06:55:04,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637352700] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:55:04,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:55:04,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-11-29 06:55:04,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523485648] [2023-11-29 06:55:04,551 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:55:04,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 06:55:04,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:04,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 06:55:04,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-11-29 06:55:04,553 INFO L87 Difference]: Start difference. First operand 144 states and 156 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 23 states have internal predecessors, (53), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) [2023-11-29 06:55:15,804 WARN L293 SmtUtils]: Spent 7.46s on a formula simplification. DAG size of input: 117 DAG size of output: 95 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 06:55:16,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:55:16,762 INFO L93 Difference]: Finished difference Result 180 states and 195 transitions. [2023-11-29 06:55:16,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 06:55:16,762 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 23 states have internal predecessors, (53), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) Word has length 89 [2023-11-29 06:55:16,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:55:16,764 INFO L225 Difference]: With dead ends: 180 [2023-11-29 06:55:16,764 INFO L226 Difference]: Without dead ends: 178 [2023-11-29 06:55:16,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 06:55:16,765 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 66 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-29 06:55:16,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 490 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-29 06:55:16,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-11-29 06:55:16,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 150. [2023-11-29 06:55:16,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 102 states have (on average 1.088235294117647) internal successors, (111), 104 states have internal predecessors, (111), 26 states have call successors, (26), 21 states have call predecessors, (26), 21 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-29 06:55:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 162 transitions. [2023-11-29 06:55:16,805 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 162 transitions. Word has length 89 [2023-11-29 06:55:16,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:55:16,805 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 162 transitions. [2023-11-29 06:55:16,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 23 states have internal predecessors, (53), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) [2023-11-29 06:55:16,806 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 162 transitions. [2023-11-29 06:55:16,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-29 06:55:16,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:55:16,807 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:16,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:55:17,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:17,007 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:55:17,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:17,008 INFO L85 PathProgramCache]: Analyzing trace with hash 619728979, now seen corresponding path program 1 times [2023-11-29 06:55:17,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:17,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823868236] [2023-11-29 06:55:17,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:17,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:17,017 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:55:17,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143693843] [2023-11-29 06:55:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:17,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:17,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:17,018 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:17,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:55:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:17,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 06:55:17,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 54 proven. 66 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-11-29 06:55:17,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:55:22,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:22,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823868236] [2023-11-29 06:55:22,808 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:55:22,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143693843] [2023-11-29 06:55:22,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143693843] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:55:22,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:55:22,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-29 06:55:22,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716317031] [2023-11-29 06:55:22,808 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:55:22,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:55:22,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:22,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:55:22,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2023-11-29 06:55:22,809 INFO L87 Difference]: Start difference. First operand 150 states and 162 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2023-11-29 06:55:23,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:55:23,148 INFO L93 Difference]: Finished difference Result 180 states and 190 transitions. [2023-11-29 06:55:23,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:55:23,148 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 89 [2023-11-29 06:55:23,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:55:23,149 INFO L225 Difference]: With dead ends: 180 [2023-11-29 06:55:23,149 INFO L226 Difference]: Without dead ends: 152 [2023-11-29 06:55:23,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2023-11-29 06:55:23,150 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:55:23,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 319 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:55:23,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-29 06:55:23,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 144. [2023-11-29 06:55:23,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 98 states have (on average 1.0714285714285714) internal successors, (105), 100 states have internal predecessors, (105), 24 states have call successors, (24), 21 states have call predecessors, (24), 21 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-29 06:55:23,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2023-11-29 06:55:23,215 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 89 [2023-11-29 06:55:23,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:55:23,215 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2023-11-29 06:55:23,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2023-11-29 06:55:23,215 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2023-11-29 06:55:23,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 06:55:23,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:55:23,217 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:23,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 06:55:23,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:23,417 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:55:23,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:23,418 INFO L85 PathProgramCache]: Analyzing trace with hash -633696978, now seen corresponding path program 2 times [2023-11-29 06:55:23,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:23,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442766894] [2023-11-29 06:55:23,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:23,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:23,428 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:55:23,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754157788] [2023-11-29 06:55:23,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:55:23,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:23,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:23,429 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:23,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:55:23,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:55:23,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-11-29 06:55:23,488 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 06:55:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 06:55:23,542 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 06:55:23,543 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 06:55:23,544 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-29 06:55:23,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:55:23,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:23,748 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:23,752 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 06:55:23,775 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-11-29 06:55:23,777 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-11-29 06:55:23,778 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-11-29 06:55:23,779 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-11-29 06:55:23,780 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-29 06:55:23,781 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-29 06:55:23,793 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 06:55:23 BoogieIcfgContainer [2023-11-29 06:55:23,793 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 06:55:23,794 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 06:55:23,794 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 06:55:23,794 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 06:55:23,794 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:52:25" (3/4) ... [2023-11-29 06:55:23,795 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-29 06:55:23,804 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-11-29 06:55:23,805 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-11-29 06:55:23,806 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-11-29 06:55:23,808 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-11-29 06:55:23,809 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-29 06:55:23,810 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-29 06:55:23,852 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-29 06:55:23,852 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 06:55:23,853 INFO L158 Benchmark]: Toolchain (without parser) took 179190.65ms. Allocated memory was 153.1MB in the beginning and 207.6MB in the end (delta: 54.5MB). Free memory was 105.2MB in the beginning and 140.8MB in the end (delta: -35.6MB). Peak memory consumption was 20.0MB. Max. memory is 16.1GB. [2023-11-29 06:55:23,853 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 153.1MB. Free memory was 127.2MB in the beginning and 126.8MB in the end (delta: 336.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 06:55:23,854 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.11ms. Allocated memory is still 153.1MB. Free memory was 104.9MB in the beginning and 94.1MB in the end (delta: 10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-29 06:55:23,854 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.97ms. Allocated memory is still 153.1MB. Free memory was 94.1MB in the beginning and 92.3MB in the end (delta: 1.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 06:55:23,854 INFO L158 Benchmark]: Boogie Preprocessor took 33.49ms. Allocated memory is still 153.1MB. Free memory was 92.3MB in the beginning and 90.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 06:55:23,855 INFO L158 Benchmark]: RCFGBuilder took 286.50ms. Allocated memory is still 153.1MB. Free memory was 90.6MB in the beginning and 78.7MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-29 06:55:23,855 INFO L158 Benchmark]: TraceAbstraction took 178545.56ms. Allocated memory was 153.1MB in the beginning and 207.6MB in the end (delta: 54.5MB). Free memory was 77.7MB in the beginning and 145.0MB in the end (delta: -67.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 06:55:23,855 INFO L158 Benchmark]: Witness Printer took 58.71ms. Allocated memory is still 207.6MB. Free memory was 145.0MB in the beginning and 140.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 06:55:23,857 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 153.1MB. Free memory was 127.2MB in the beginning and 126.8MB in the end (delta: 336.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 226.11ms. Allocated memory is still 153.1MB. Free memory was 104.9MB in the beginning and 94.1MB in the end (delta: 10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.97ms. Allocated memory is still 153.1MB. Free memory was 94.1MB in the beginning and 92.3MB in the end (delta: 1.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.49ms. Allocated memory is still 153.1MB. Free memory was 92.3MB in the beginning and 90.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 286.50ms. Allocated memory is still 153.1MB. Free memory was 90.6MB in the beginning and 78.7MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 178545.56ms. Allocated memory was 153.1MB in the beginning and 207.6MB in the end (delta: 54.5MB). Free memory was 77.7MB in the beginning and 145.0MB in the end (delta: -67.4MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 58.71ms. Allocated memory is still 207.6MB. Free memory was 145.0MB in the beginning and 140.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 VAL [A=7, B=1, counter=0, d=1, p=1, q=0, r=7] [L34] EXPR counter++ VAL [A=7, B=1, counter=1, d=1, p=1, q=0, r=7] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(q == 0) VAL [A=7, B=1, counter=1, d=1, p=1, q=0, r=7] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(r == A) VAL [A=7, B=1, counter=1, d=1, p=1, q=0, r=7] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=7, B=1, counter=1, d=1, p=1, q=0, r=7] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=7, B=1, counter=1, d=2, p=2, q=0, r=7] [L34] EXPR counter++ VAL [A=7, B=1, counter=2, d=2, p=2, q=0, r=7] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L35] RET __VERIFIER_assert(q == 0) VAL [A=7, B=1, counter=2, d=2, p=2, q=0, r=7] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L36] RET __VERIFIER_assert(r == A) VAL [A=7, B=1, counter=2, d=2, p=2, q=0, r=7] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=7, B=1, counter=2, d=2, p=2, q=0, r=7] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=7, B=1, counter=2, d=4, p=4, q=0, r=7] [L34] EXPR counter++ VAL [A=7, B=1, counter=3, d=4, p=4, q=0, r=7] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L35] RET __VERIFIER_assert(q == 0) VAL [A=7, B=1, counter=3, d=4, p=4, q=0, r=7] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L36] RET __VERIFIER_assert(r == A) VAL [A=7, B=1, counter=3, d=4, p=4, q=0, r=7] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=7, B=1, counter=3, d=4, p=4, q=0, r=7] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=7, B=1, counter=3, d=8, p=8, q=0, r=7] [L34] EXPR counter++ VAL [A=7, B=1, counter=4, d=8, p=8, q=0, r=7] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L35] RET __VERIFIER_assert(q == 0) VAL [A=7, B=1, counter=4, d=8, p=8, q=0, r=7] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L36] RET __VERIFIER_assert(r == A) VAL [A=7, B=1, counter=4, d=8, p=8, q=0, r=7] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=7, B=1, counter=4, d=8, p=8, q=0, r=7] [L38] COND TRUE !(r >= d) VAL [A=7, B=1, counter=4, d=8, p=8, q=0, r=7] [L44] EXPR counter++ VAL [A=7, B=1, counter=5, d=8, p=8, q=0, r=7] [L44] COND TRUE counter++<5 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [A=7, B=1, counter=5, d=8, p=8, q=0, r=7] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L46] RET __VERIFIER_assert(d == B*p) VAL [A=7, B=1, counter=5, d=8, p=8, q=0, r=7] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [A=7, B=1, counter=5, d=4, p=4, q=0, r=7] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [A=7, B=1, counter=5, d=4, p=4, q=4, r=3] [L44] EXPR counter++ VAL [A=7, B=1, counter=6, d=4, p=4, q=4, r=3] [L44] COND FALSE !(counter++<5) [L58] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=0, counter=6] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=6] [L17] reach_error() VAL [\old(cond)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 178.4s, OverallIterations: 16, TraceHistogramMax: 15, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 31.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 443 SdHoareTripleChecker+Valid, 7.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 401 mSDsluCounter, 2635 SdHoareTripleChecker+Invalid, 7.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2148 mSDsCounter, 230 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1978 IncrementalHoareTripleChecker+Invalid, 2208 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 230 mSolverCounterUnsat, 487 mSDtfsCounter, 1978 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1324 GetRequests, 1137 SyntacticMatches, 13 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 34.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=207occurred in iteration=9, InterpolantAutomatonStates: 150, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 15 MinimizatonAttempts, 120 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 142.3s InterpolantComputationTime, 817 NumberOfCodeBlocks, 817 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1267 ConstructedInterpolants, 0 QuantifiedInterpolants, 22515 SizeOfPredicates, 36 NumberOfNonLiveVariables, 2063 ConjunctsInSsa, 256 ConjunctsInUnsatCore, 25 InterpolantComputations, 4 PerfectInterpolantSequences, 3390/4130 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-29 06:55:23,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4725128-5f7a-4cbc-a566-6c6dbb7f02ef/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE