./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s2lif.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/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_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s2lif.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/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_45a1fbc0-3e12-41f5-98ed-269471ee43df/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 b94168e93e7008f2fa8921a5a8a54bdf1fdce85df40220d4719fdc5076df164f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:30:57,672 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:30:57,749 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 01:30:57,753 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:30:57,754 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:30:57,784 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:30:57,785 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:30:57,785 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:30:57,786 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:30:57,786 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:30:57,787 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:30:57,787 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:30:57,788 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:30:57,789 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:30:57,789 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:30:57,790 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:30:57,790 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:30:57,791 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:30:57,791 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:30:57,792 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:30:57,792 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:30:57,793 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:30:57,793 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:30:57,794 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:30:57,794 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:30:57,794 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:30:57,795 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:30:57,795 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:30:57,796 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:30:57,796 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:30:57,796 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:30:57,797 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:30:57,797 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:30:57,797 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:30:57,798 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:30:57,798 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:30:57,798 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:30:57,798 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:30:57,798 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:30:57,799 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:30:57,799 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:30:57,799 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:30:57,799 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_45a1fbc0-3e12-41f5-98ed-269471ee43df/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b94168e93e7008f2fa8921a5a8a54bdf1fdce85df40220d4719fdc5076df164f [2023-11-29 01:30:58,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:30:58,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:30:58,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:30:58,053 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:30:58,053 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:30:58,054 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-fpi/s2lif.c [2023-11-29 01:31:00,816 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:31:00,991 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:31:00,992 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/sv-benchmarks/c/array-fpi/s2lif.c [2023-11-29 01:31:00,999 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/data/f19358237/7471a8e29db643738ec96507f8d12a65/FLAG765a80554 [2023-11-29 01:31:01,013 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/data/f19358237/7471a8e29db643738ec96507f8d12a65 [2023-11-29 01:31:01,015 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:31:01,017 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:31:01,018 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:31:01,018 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:31:01,023 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:31:01,024 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:31:01" (1/1) ... [2023-11-29 01:31:01,025 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fe9106a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:01, skipping insertion in model container [2023-11-29 01:31:01,025 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:31:01" (1/1) ... [2023-11-29 01:31:01,045 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:31:01,194 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_45a1fbc0-3e12-41f5-98ed-269471ee43df/sv-benchmarks/c/array-fpi/s2lif.c[588,601] [2023-11-29 01:31:01,229 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:31:01,251 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:31:01,271 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_45a1fbc0-3e12-41f5-98ed-269471ee43df/sv-benchmarks/c/array-fpi/s2lif.c[588,601] [2023-11-29 01:31:01,280 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:31:01,294 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:31:01,294 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:01 WrapperNode [2023-11-29 01:31:01,295 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:31:01,296 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:31:01,296 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:31:01,296 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:31:01,303 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:01" (1/1) ... [2023-11-29 01:31:01,310 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:01" (1/1) ... [2023-11-29 01:31:01,330 INFO L138 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2023-11-29 01:31:01,330 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:31:01,331 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:31:01,331 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:31:01,331 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:31:01,340 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:01" (1/1) ... [2023-11-29 01:31:01,340 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:01" (1/1) ... [2023-11-29 01:31:01,342 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:01" (1/1) ... [2023-11-29 01:31:01,353 INFO L175 MemorySlicer]: Split 21 memory accesses to 4 slices as follows [2, 8, 4, 7]. 38 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0]. The 5 writes are split as follows [0, 0, 2, 3]. [2023-11-29 01:31:01,354 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:01" (1/1) ... [2023-11-29 01:31:01,354 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:01" (1/1) ... [2023-11-29 01:31:01,361 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:01" (1/1) ... [2023-11-29 01:31:01,364 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:01" (1/1) ... [2023-11-29 01:31:01,366 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:01" (1/1) ... [2023-11-29 01:31:01,367 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:01" (1/1) ... [2023-11-29 01:31:01,370 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:31:01,371 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:31:01,371 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:31:01,371 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:31:01,372 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:01" (1/1) ... [2023-11-29 01:31:01,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:31:01,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:31:01,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:31:01,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:31:01,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:31:01,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:31:01,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 01:31:01,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 01:31:01,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 01:31:01,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 01:31:01,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 01:31:01,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 01:31:01,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 01:31:01,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 01:31:01,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 01:31:01,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:31:01,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:31:01,442 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 01:31:01,442 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 01:31:01,442 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 01:31:01,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 01:31:01,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 01:31:01,524 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:31:01,526 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:31:01,671 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:31:01,698 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:31:01,698 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 01:31:01,699 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:31:01 BoogieIcfgContainer [2023-11-29 01:31:01,699 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:31:01,702 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:31:01,702 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:31:01,706 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:31:01,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:31:01" (1/3) ... [2023-11-29 01:31:01,707 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c343e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:31:01, skipping insertion in model container [2023-11-29 01:31:01,707 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:01" (2/3) ... [2023-11-29 01:31:01,707 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c343e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:31:01, skipping insertion in model container [2023-11-29 01:31:01,707 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:31:01" (3/3) ... [2023-11-29 01:31:01,709 INFO L112 eAbstractionObserver]: Analyzing ICFG s2lif.c [2023-11-29 01:31:01,729 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:31:01,729 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 01:31:01,778 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:31:01,785 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;@7e73944e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:31:01,785 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 01:31:01,789 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:01,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 01:31:01,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:01,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:31:01,797 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:31:01,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:01,803 INFO L85 PathProgramCache]: Analyzing trace with hash 199618784, now seen corresponding path program 1 times [2023-11-29 01:31:01,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:01,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559717581] [2023-11-29 01:31:01,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:01,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:01,976 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 01:31:01,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:01,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559717581] [2023-11-29 01:31:01,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559717581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:31:01,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:31:01,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:31:01,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233088829] [2023-11-29 01:31:01,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:31:01,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 01:31:01,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:02,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 01:31:02,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 01:31:02,016 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:02,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:31:02,042 INFO L93 Difference]: Finished difference Result 33 states and 49 transitions. [2023-11-29 01:31:02,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 01:31:02,044 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-29 01:31:02,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:31:02,052 INFO L225 Difference]: With dead ends: 33 [2023-11-29 01:31:02,052 INFO L226 Difference]: Without dead ends: 15 [2023-11-29 01:31:02,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 01:31:02,059 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:31:02,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:31:02,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-29 01:31:02,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-29 01:31:02,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:02,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-11-29 01:31:02,091 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 12 [2023-11-29 01:31:02,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:31:02,091 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-11-29 01:31:02,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:02,092 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-11-29 01:31:02,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 01:31:02,092 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:02,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:31:02,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 01:31:02,093 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:31:02,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:02,093 INFO L85 PathProgramCache]: Analyzing trace with hash -193408226, now seen corresponding path program 1 times [2023-11-29 01:31:02,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:02,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160668427] [2023-11-29 01:31:02,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:02,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:02,231 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 01:31:02,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:02,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160668427] [2023-11-29 01:31:02,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160668427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:31:02,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:31:02,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:31:02,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810512086] [2023-11-29 01:31:02,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:31:02,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:31:02,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:02,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:31:02,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:31:02,236 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:02,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:31:02,283 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2023-11-29 01:31:02,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:31:02,284 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-29 01:31:02,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:31:02,284 INFO L225 Difference]: With dead ends: 30 [2023-11-29 01:31:02,284 INFO L226 Difference]: Without dead ends: 20 [2023-11-29 01:31:02,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:31:02,286 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:31:02,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 9 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:31:02,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-29 01:31:02,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2023-11-29 01:31:02,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:02,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-11-29 01:31:02,292 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2023-11-29 01:31:02,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:31:02,293 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-11-29 01:31:02,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:02,293 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-11-29 01:31:02,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 01:31:02,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:02,294 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:31:02,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 01:31:02,294 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:31:02,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:02,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1840868648, now seen corresponding path program 1 times [2023-11-29 01:31:02,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:02,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890820849] [2023-11-29 01:31:02,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:02,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:31:03,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:03,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890820849] [2023-11-29 01:31:03,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890820849] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:31:03,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521162417] [2023-11-29 01:31:03,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:03,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:03,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:31:03,148 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:31:03,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:31:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:03,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 01:31:03,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:31:03,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:31:03,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:31:03,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:31:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:31:03,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:31:03,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2023-11-29 01:31:03,768 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:31:03,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2023-11-29 01:31:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:31:03,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521162417] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:31:03,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:31:03,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2023-11-29 01:31:03,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050142106] [2023-11-29 01:31:03,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:31:03,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 01:31:03,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:03,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 01:31:03,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2023-11-29 01:31:03,914 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:04,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:31:04,311 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-11-29 01:31:04,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 01:31:04,311 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-29 01:31:04,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:31:04,313 INFO L225 Difference]: With dead ends: 40 [2023-11-29 01:31:04,313 INFO L226 Difference]: Without dead ends: 36 [2023-11-29 01:31:04,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 01:31:04,316 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 60 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:31:04,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 60 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:31:04,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-29 01:31:04,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2023-11-29 01:31:04,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:04,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-11-29 01:31:04,324 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2023-11-29 01:31:04,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:31:04,324 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-11-29 01:31:04,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:04,325 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-11-29 01:31:04,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 01:31:04,325 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:04,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:31:04,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:31:04,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-29 01:31:04,528 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:31:04,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:04,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1160810278, now seen corresponding path program 1 times [2023-11-29 01:31:04,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:04,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063241880] [2023-11-29 01:31:04,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:04,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:31:04,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:04,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063241880] [2023-11-29 01:31:04,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063241880] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:31:04,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588497353] [2023-11-29 01:31:04,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:04,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:04,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:31:04,727 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:31:04,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:31:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:04,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 01:31:04,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:31:04,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:31:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:31:04,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:31:04,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-29 01:31:04,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-29 01:31:04,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:31:04,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588497353] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:31:04,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:31:04,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-11-29 01:31:04,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147518569] [2023-11-29 01:31:04,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:31:04,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:31:04,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:04,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:31:04,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:31:04,887 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:04,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:31:04,949 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2023-11-29 01:31:04,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:31:04,950 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-29 01:31:04,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:31:04,951 INFO L225 Difference]: With dead ends: 41 [2023-11-29 01:31:04,951 INFO L226 Difference]: Without dead ends: 31 [2023-11-29 01:31:04,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:31:04,952 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:31:04,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 46 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:31:04,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-29 01:31:04,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2023-11-29 01:31:04,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:04,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-11-29 01:31:04,960 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 17 [2023-11-29 01:31:04,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:31:04,960 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-11-29 01:31:04,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:04,961 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-11-29 01:31:04,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 01:31:04,961 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:04,961 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:31:04,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 01:31:05,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:05,162 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:31:05,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:05,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1209506422, now seen corresponding path program 2 times [2023-11-29 01:31:05,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:05,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433793810] [2023-11-29 01:31:05,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:05,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:05,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:31:05,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:05,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433793810] [2023-11-29 01:31:05,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433793810] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:31:05,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12840999] [2023-11-29 01:31:05,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:31:05,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:05,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:31:05,252 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:31:05,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:31:05,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:31:05,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:31:05,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:31:05,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:31:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:31:05,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:31:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:31:05,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12840999] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:31:05,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:31:05,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-29 01:31:05,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651064323] [2023-11-29 01:31:05,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:31:05,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 01:31:05,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:05,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 01:31:05,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:31:05,418 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:05,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:31:05,525 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2023-11-29 01:31:05,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:31:05,526 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-29 01:31:05,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:31:05,526 INFO L225 Difference]: With dead ends: 59 [2023-11-29 01:31:05,527 INFO L226 Difference]: Without dead ends: 36 [2023-11-29 01:31:05,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:31:05,528 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 42 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:31:05,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 27 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:31:05,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-29 01:31:05,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2023-11-29 01:31:05,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:05,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-11-29 01:31:05,535 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2023-11-29 01:31:05,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:31:05,536 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-11-29 01:31:05,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:05,536 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-11-29 01:31:05,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 01:31:05,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:05,537 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:31:05,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 01:31:05,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:05,740 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:31:05,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:05,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1807460438, now seen corresponding path program 3 times [2023-11-29 01:31:05,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:05,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952257276] [2023-11-29 01:31:05,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:05,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:05,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:05,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:31:05,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:05,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952257276] [2023-11-29 01:31:05,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952257276] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:31:05,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890813731] [2023-11-29 01:31:05,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:31:05,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:05,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:31:05,813 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:31:05,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:31:05,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 01:31:05,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:31:05,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:31:05,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:31:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:31:05,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:31:05,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:31:05,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890813731] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:31:05,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:31:05,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-29 01:31:05,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972917038] [2023-11-29 01:31:05,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:31:05,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 01:31:05,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:05,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 01:31:05,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:31:05,990 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:06,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:31:06,073 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2023-11-29 01:31:06,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:31:06,073 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-29 01:31:06,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:31:06,074 INFO L225 Difference]: With dead ends: 32 [2023-11-29 01:31:06,074 INFO L226 Difference]: Without dead ends: 25 [2023-11-29 01:31:06,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:31:06,075 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 37 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:31:06,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 19 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:31:06,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-29 01:31:06,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-11-29 01:31:06,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:06,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-11-29 01:31:06,081 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2023-11-29 01:31:06,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:31:06,081 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-11-29 01:31:06,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:06,081 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-11-29 01:31:06,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 01:31:06,082 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:06,082 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:31:06,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 01:31:06,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:06,282 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:31:06,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:06,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1712818014, now seen corresponding path program 4 times [2023-11-29 01:31:06,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:06,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293097855] [2023-11-29 01:31:06,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:06,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:07,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:31:07,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:07,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293097855] [2023-11-29 01:31:07,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293097855] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:31:07,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841320423] [2023-11-29 01:31:07,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:31:07,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:07,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:31:07,342 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:31:07,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:31:07,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:31:07,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:31:07,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 01:31:07,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:31:07,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:31:07,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:31:07,794 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:31:07,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 01:31:07,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:31:07,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:31:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:31:08,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:31:08,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2023-11-29 01:31:08,441 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:31:08,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 386 treesize of output 383 [2023-11-29 01:31:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:31:08,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841320423] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:31:08,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:31:08,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 44 [2023-11-29 01:31:08,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273475512] [2023-11-29 01:31:08,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:31:08,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 01:31:08,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:08,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 01:31:08,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 01:31:08,774 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 44 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:10,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:31:10,519 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2023-11-29 01:31:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 01:31:10,520 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-29 01:31:10,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:31:10,521 INFO L225 Difference]: With dead ends: 70 [2023-11-29 01:31:10,521 INFO L226 Difference]: Without dead ends: 57 [2023-11-29 01:31:10,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=744, Invalid=3678, Unknown=0, NotChecked=0, Total=4422 [2023-11-29 01:31:10,524 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 136 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:31:10,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 60 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:31:10,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-29 01:31:10,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2023-11-29 01:31:10,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:10,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2023-11-29 01:31:10,534 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 22 [2023-11-29 01:31:10,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:31:10,534 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2023-11-29 01:31:10,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:10,534 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2023-11-29 01:31:10,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 01:31:10,535 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:10,535 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:31:10,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 01:31:10,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:10,736 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:31:10,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:10,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1319791004, now seen corresponding path program 1 times [2023-11-29 01:31:10,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:10,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770459507] [2023-11-29 01:31:10,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:10,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:31:10,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:10,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770459507] [2023-11-29 01:31:10,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770459507] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:31:10,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774260503] [2023-11-29 01:31:10,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:10,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:10,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:31:10,959 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:31:10,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:31:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:11,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 01:31:11,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:31:11,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:31:11,088 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:31:11,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-11-29 01:31:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:31:11,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:31:11,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:31:11,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:31:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:31:11,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774260503] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:31:11,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:31:11,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-11-29 01:31:11,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883792437] [2023-11-29 01:31:11,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:31:11,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:31:11,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:11,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:31:11,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:31:11,176 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:11,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:31:11,269 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2023-11-29 01:31:11,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:31:11,269 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-29 01:31:11,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:31:11,270 INFO L225 Difference]: With dead ends: 68 [2023-11-29 01:31:11,270 INFO L226 Difference]: Without dead ends: 46 [2023-11-29 01:31:11,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:31:11,271 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:31:11,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:31:11,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-29 01:31:11,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2023-11-29 01:31:11,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2023-11-29 01:31:11,282 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 22 [2023-11-29 01:31:11,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:31:11,282 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2023-11-29 01:31:11,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:11,283 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2023-11-29 01:31:11,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 01:31:11,283 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:11,283 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:31:11,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 01:31:11,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 01:31:11,489 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:31:11,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:11,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1580597700, now seen corresponding path program 5 times [2023-11-29 01:31:11,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:11,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167794817] [2023-11-29 01:31:11,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:11,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 01:31:11,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:11,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167794817] [2023-11-29 01:31:11,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167794817] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:31:11,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625691488] [2023-11-29 01:31:11,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:31:11,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:11,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:31:11,590 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:31:11,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 01:31:11,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 01:31:11,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:31:11,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:31:11,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:31:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 01:31:11,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:31:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 01:31:11,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625691488] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:31:11,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:31:11,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-29 01:31:11,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345410089] [2023-11-29 01:31:11,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:31:11,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:31:11,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:11,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:31:11,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:31:11,800 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:11,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:31:11,936 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2023-11-29 01:31:11,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:31:11,937 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-29 01:31:11,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:31:11,937 INFO L225 Difference]: With dead ends: 73 [2023-11-29 01:31:11,938 INFO L226 Difference]: Without dead ends: 42 [2023-11-29 01:31:11,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:31:11,939 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 58 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:31:11,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 29 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:31:11,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-29 01:31:11,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2023-11-29 01:31:11,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:11,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-11-29 01:31:11,948 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 23 [2023-11-29 01:31:11,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:31:11,949 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-11-29 01:31:11,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:11,949 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-11-29 01:31:11,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 01:31:11,950 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:11,950 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:31:11,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 01:31:12,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 01:31:12,152 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:31:12,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:12,153 INFO L85 PathProgramCache]: Analyzing trace with hash -160565812, now seen corresponding path program 6 times [2023-11-29 01:31:12,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:12,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199886413] [2023-11-29 01:31:12,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:12,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:12,237 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:31:12,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:12,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199886413] [2023-11-29 01:31:12,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199886413] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:31:12,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747347985] [2023-11-29 01:31:12,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:31:12,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:12,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:31:12,238 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:31:12,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 01:31:12,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 01:31:12,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:31:12,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:31:12,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:31:12,386 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 01:31:12,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:31:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 01:31:12,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747347985] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:31:12,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:31:12,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-29 01:31:12,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667710599] [2023-11-29 01:31:12,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:31:12,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:31:12,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:12,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:31:12,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:31:12,445 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:12,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:31:12,544 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2023-11-29 01:31:12,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:31:12,544 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-29 01:31:12,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:31:12,545 INFO L225 Difference]: With dead ends: 38 [2023-11-29 01:31:12,545 INFO L226 Difference]: Without dead ends: 30 [2023-11-29 01:31:12,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:31:12,546 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:31:12,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 27 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:31:12,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-29 01:31:12,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2023-11-29 01:31:12,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:12,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-11-29 01:31:12,554 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2023-11-29 01:31:12,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:31:12,554 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-11-29 01:31:12,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:12,554 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-11-29 01:31:12,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 01:31:12,555 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:12,555 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:31:12,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 01:31:12,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 01:31:12,761 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:31:12,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:12,761 INFO L85 PathProgramCache]: Analyzing trace with hash 851391128, now seen corresponding path program 7 times [2023-11-29 01:31:12,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:12,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127596688] [2023-11-29 01:31:12,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:12,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:31:14,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:14,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127596688] [2023-11-29 01:31:14,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127596688] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:31:14,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317445704] [2023-11-29 01:31:14,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:31:14,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:14,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:31:14,058 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:31:14,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 01:31:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:14,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-29 01:31:14,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:31:14,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:31:14,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:31:14,688 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:31:14,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 01:31:14,857 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:31:14,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2023-11-29 01:31:14,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:31:15,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:31:15,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:31:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:31:15,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:31:15,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 125 [2023-11-29 01:31:15,931 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:31:15,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 11693 treesize of output 11111 [2023-11-29 01:31:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:31:16,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317445704] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:31:16,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:31:16,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 21] total 60 [2023-11-29 01:31:16,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508136071] [2023-11-29 01:31:16,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:31:16,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-29 01:31:16,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:16,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-29 01:31:16,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=3145, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 01:31:16,359 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 60 states, 60 states have (on average 1.2) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:17,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:31:17,622 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2023-11-29 01:31:17,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 01:31:17,622 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.2) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-29 01:31:17,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:31:17,623 INFO L225 Difference]: With dead ends: 68 [2023-11-29 01:31:17,623 INFO L226 Difference]: Without dead ends: 64 [2023-11-29 01:31:17,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=706, Invalid=4844, Unknown=0, NotChecked=0, Total=5550 [2023-11-29 01:31:17,626 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 95 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:31:17,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 122 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 01:31:17,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-29 01:31:17,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 42. [2023-11-29 01:31:17,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:17,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2023-11-29 01:31:17,640 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 27 [2023-11-29 01:31:17,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:31:17,640 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2023-11-29 01:31:17,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.2) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:17,640 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2023-11-29 01:31:17,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 01:31:17,641 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:17,641 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:31:17,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 01:31:17,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 01:31:17,842 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:31:17,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:17,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1552455706, now seen corresponding path program 2 times [2023-11-29 01:31:17,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:17,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883394453] [2023-11-29 01:31:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:17,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 01:31:18,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:18,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883394453] [2023-11-29 01:31:18,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883394453] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:31:18,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537941374] [2023-11-29 01:31:18,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:31:18,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:18,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:31:18,102 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:31:18,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 01:31:18,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:31:18,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:31:18,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 01:31:18,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:31:18,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:31:18,307 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:31:18,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-11-29 01:31:18,349 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:31:18,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-11-29 01:31:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 01:31:18,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:31:18,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 01:31:18,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:31:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 01:31:18,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537941374] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:31:18,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:31:18,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2023-11-29 01:31:18,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803463331] [2023-11-29 01:31:18,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:31:18,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 01:31:18,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:18,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 01:31:18,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:31:18,421 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:18,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:31:18,549 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2023-11-29 01:31:18,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 01:31:18,550 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-29 01:31:18,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:31:18,550 INFO L225 Difference]: With dead ends: 61 [2023-11-29 01:31:18,550 INFO L226 Difference]: Without dead ends: 49 [2023-11-29 01:31:18,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:31:18,551 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:31:18,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 79 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:31:18,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-29 01:31:18,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2023-11-29 01:31:18,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:18,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2023-11-29 01:31:18,562 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 27 [2023-11-29 01:31:18,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:31:18,562 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2023-11-29 01:31:18,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:18,562 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2023-11-29 01:31:18,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 01:31:18,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:18,563 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:31:18,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 01:31:18,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 01:31:18,763 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:31:18,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:18,763 INFO L85 PathProgramCache]: Analyzing trace with hash 646168010, now seen corresponding path program 8 times [2023-11-29 01:31:18,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:18,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291146668] [2023-11-29 01:31:18,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:18,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:31:18,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:18,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291146668] [2023-11-29 01:31:18,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291146668] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:31:18,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481854300] [2023-11-29 01:31:18,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:31:18,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:18,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:31:18,896 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:31:18,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 01:31:18,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:31:18,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:31:18,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:31:18,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:31:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:31:19,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:31:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:31:19,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481854300] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:31:19,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:31:19,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-29 01:31:19,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415952396] [2023-11-29 01:31:19,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:31:19,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 01:31:19,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:19,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 01:31:19,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:31:19,165 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:19,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:31:19,309 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2023-11-29 01:31:19,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:31:19,309 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-29 01:31:19,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:31:19,310 INFO L225 Difference]: With dead ends: 81 [2023-11-29 01:31:19,310 INFO L226 Difference]: Without dead ends: 48 [2023-11-29 01:31:19,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 43 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-11-29 01:31:19,311 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 87 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:31:19,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 28 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:31:19,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-29 01:31:19,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2023-11-29 01:31:19,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:19,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2023-11-29 01:31:19,323 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2023-11-29 01:31:19,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:31:19,323 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2023-11-29 01:31:19,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:19,323 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2023-11-29 01:31:19,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 01:31:19,324 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:19,324 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:31:19,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 01:31:19,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 01:31:19,524 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:31:19,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:19,525 INFO L85 PathProgramCache]: Analyzing trace with hash -655189782, now seen corresponding path program 9 times [2023-11-29 01:31:19,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:19,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907439691] [2023-11-29 01:31:19,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:19,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 01:31:19,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:19,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907439691] [2023-11-29 01:31:19,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907439691] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:31:19,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258235534] [2023-11-29 01:31:19,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:31:19,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:19,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:31:19,653 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:31:19,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 01:31:19,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 01:31:19,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:31:19,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:31:19,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:31:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:31:19,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:31:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:31:19,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258235534] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:31:19,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:31:19,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-29 01:31:19,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678062930] [2023-11-29 01:31:19,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:31:19,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 01:31:19,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:19,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 01:31:19,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:31:19,930 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:20,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:31:20,079 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2023-11-29 01:31:20,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:31:20,080 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-29 01:31:20,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:31:20,080 INFO L225 Difference]: With dead ends: 44 [2023-11-29 01:31:20,080 INFO L226 Difference]: Without dead ends: 35 [2023-11-29 01:31:20,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2023-11-29 01:31:20,081 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 64 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:31:20,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 27 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:31:20,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-29 01:31:20,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2023-11-29 01:31:20,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:20,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2023-11-29 01:31:20,093 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 28 [2023-11-29 01:31:20,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:31:20,093 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2023-11-29 01:31:20,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:20,093 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2023-11-29 01:31:20,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 01:31:20,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:20,094 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:31:20,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 01:31:20,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 01:31:20,294 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:31:20,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:20,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1895765090, now seen corresponding path program 10 times [2023-11-29 01:31:20,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:20,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827674043] [2023-11-29 01:31:20,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:20,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:31:22,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:22,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827674043] [2023-11-29 01:31:22,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827674043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:31:22,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591420456] [2023-11-29 01:31:22,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:31:22,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:22,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:31:22,258 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:31:22,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 01:31:22,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:31:22,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:31:22,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-29 01:31:22,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:31:22,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:31:22,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:31:22,844 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:31:22,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 01:31:23,014 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:31:23,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2023-11-29 01:31:23,242 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:31:23,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 41 [2023-11-29 01:31:23,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:31:23,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:31:23,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:31:23,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:31:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:31:23,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:31:25,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 196 [2023-11-29 01:31:25,360 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:31:25,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1546288 treesize of output 1489057 [2023-11-29 01:31:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:31:26,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591420456] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:31:26,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:31:26,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 76 [2023-11-29 01:31:26,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260626742] [2023-11-29 01:31:26,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:31:26,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-11-29 01:31:26,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:26,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-11-29 01:31:26,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=5078, Unknown=0, NotChecked=0, Total=5700 [2023-11-29 01:31:26,356 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 76 states, 76 states have (on average 1.118421052631579) internal successors, (85), 76 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:28,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:31:28,625 INFO L93 Difference]: Finished difference Result 84 states and 101 transitions. [2023-11-29 01:31:28,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 01:31:28,626 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.118421052631579) internal successors, (85), 76 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-29 01:31:28,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:31:28,626 INFO L225 Difference]: With dead ends: 84 [2023-11-29 01:31:28,626 INFO L226 Difference]: Without dead ends: 63 [2023-11-29 01:31:28,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2846 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1222, Invalid=8678, Unknown=0, NotChecked=0, Total=9900 [2023-11-29 01:31:28,630 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 169 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:31:28,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 119 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1133 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 01:31:28,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-29 01:31:28,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2023-11-29 01:31:28,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 51 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2023-11-29 01:31:28,645 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 32 [2023-11-29 01:31:28,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:31:28,645 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2023-11-29 01:31:28,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.118421052631579) internal successors, (85), 76 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:28,645 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2023-11-29 01:31:28,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 01:31:28,645 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:28,645 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:31:28,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 01:31:28,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 01:31:28,846 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:31:28,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:28,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1637599652, now seen corresponding path program 3 times [2023-11-29 01:31:28,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:28,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362524685] [2023-11-29 01:31:28,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:28,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 01:31:29,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:29,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362524685] [2023-11-29 01:31:29,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362524685] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:31:29,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525285738] [2023-11-29 01:31:29,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:31:29,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:29,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:31:29,179 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:31:29,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 01:31:29,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 01:31:29,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:31:29,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 01:31:29,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:31:29,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:31:29,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:31:29,492 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:31:29,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 24 [2023-11-29 01:31:29,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:31:29,542 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:31:29,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 24 [2023-11-29 01:31:29,588 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2023-11-29 01:31:29,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 42 [2023-11-29 01:31:29,700 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:31:29,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2023-11-29 01:31:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 01:31:29,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:31:30,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 102 [2023-11-29 01:31:30,463 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-11-29 01:31:30,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23331 treesize of output 18923 [2023-11-29 01:31:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 01:31:30,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525285738] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:31:30,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:31:30,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 17] total 40 [2023-11-29 01:31:30,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744728097] [2023-11-29 01:31:30,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:31:30,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-29 01:31:30,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:30,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-29 01:31:30,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1316, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 01:31:30,567 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 40 states, 40 states have (on average 1.775) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:31,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:31:31,443 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2023-11-29 01:31:31,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 01:31:31,443 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-29 01:31:31,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:31:31,444 INFO L225 Difference]: With dead ends: 67 [2023-11-29 01:31:31,444 INFO L226 Difference]: Without dead ends: 54 [2023-11-29 01:31:31,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=648, Invalid=2774, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 01:31:31,446 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 79 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:31:31,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 69 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:31:31,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-29 01:31:31,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2023-11-29 01:31:31,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:31,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2023-11-29 01:31:31,464 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 32 [2023-11-29 01:31:31,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:31:31,465 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2023-11-29 01:31:31,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:31,465 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2023-11-29 01:31:31,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 01:31:31,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:31,466 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:31:31,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 01:31:31,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 01:31:31,666 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:31:31,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:31,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1661074358, now seen corresponding path program 11 times [2023-11-29 01:31:31,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:31,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269473049] [2023-11-29 01:31:31,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:31,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:31,824 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 01:31:31,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:31,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269473049] [2023-11-29 01:31:31,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269473049] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:31:31,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283401687] [2023-11-29 01:31:31,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:31:31,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:31,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:31:31,825 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:31:31,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 01:31:32,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-29 01:31:32,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:31:32,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 01:31:32,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:31:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 01:31:32,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:31:32,262 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 01:31:32,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283401687] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:31:32,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:31:32,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-11-29 01:31:32,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672039636] [2023-11-29 01:31:32,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:31:32,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 01:31:32,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:32,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 01:31:32,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:31:32,264 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:32,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:31:32,470 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2023-11-29 01:31:32,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 01:31:32,471 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-11-29 01:31:32,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:31:32,471 INFO L225 Difference]: With dead ends: 62 [2023-11-29 01:31:32,471 INFO L226 Difference]: Without dead ends: 58 [2023-11-29 01:31:32,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 56 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2023-11-29 01:31:32,472 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 61 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:31:32,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 27 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:31:32,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-29 01:31:32,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2023-11-29 01:31:32,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 52 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:32,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2023-11-29 01:31:32,488 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 36 [2023-11-29 01:31:32,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:31:32,488 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2023-11-29 01:31:32,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:31:32,488 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2023-11-29 01:31:32,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 01:31:32,489 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:32,489 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:31:32,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 01:31:32,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 01:31:32,690 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:31:32,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:32,690 INFO L85 PathProgramCache]: Analyzing trace with hash 69149272, now seen corresponding path program 12 times [2023-11-29 01:31:32,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:32,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984681000] [2023-11-29 01:31:32,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:32,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:31:35,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:35,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984681000] [2023-11-29 01:31:35,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984681000] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:31:35,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045973004] [2023-11-29 01:31:35,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:31:35,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:35,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:31:35,329 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:31:35,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 01:31:35,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-29 01:31:35,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:31:35,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 92 conjunts are in the unsatisfiable core [2023-11-29 01:31:35,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:31:35,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:31:35,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:31:36,074 INFO L349 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2023-11-29 01:31:36,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 27 [2023-11-29 01:31:36,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:31:36,291 INFO L349 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2023-11-29 01:31:36,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 41 [2023-11-29 01:31:36,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:31:36,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:31:36,567 INFO L349 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2023-11-29 01:31:36,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 52 treesize of output 55 [2023-11-29 01:31:36,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:31:36,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:31:36,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:31:36,959 INFO L349 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2023-11-29 01:31:36,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 63 treesize of output 69 [2023-11-29 01:31:38,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:31:38,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:31:38,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:31:38,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2023-11-29 01:31:39,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:31:39,147 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:31:39,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 76 treesize of output 114 [2023-11-29 01:31:39,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 103 [2023-11-29 01:31:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:31:39,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:31:41,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 240 treesize of output 224 [2023-11-29 01:31:42,065 INFO L349 Elim1Store]: treesize reduction 40, result has 75.2 percent of original size [2023-11-29 01:31:42,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 701504 treesize of output 691350 [2023-11-29 01:31:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:31:45,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045973004] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:31:45,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:31:45,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 93 [2023-11-29 01:31:45,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601270822] [2023-11-29 01:31:45,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:31:45,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2023-11-29 01:31:45,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:45,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2023-11-29 01:31:45,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=877, Invalid=7679, Unknown=0, NotChecked=0, Total=8556 [2023-11-29 01:31:45,069 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 93 states, 93 states have (on average 1.086021505376344) internal successors, (101), 93 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:32:14,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:14,738 INFO L93 Difference]: Finished difference Result 194 states and 242 transitions. [2023-11-29 01:32:14,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2023-11-29 01:32:14,738 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.086021505376344) internal successors, (101), 93 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-29 01:32:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:14,739 INFO L225 Difference]: With dead ends: 194 [2023-11-29 01:32:14,739 INFO L226 Difference]: Without dead ends: 177 [2023-11-29 01:32:14,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16961 ImplicationChecksByTransitivity, 33.1s TimeCoverageRelationStatistics Valid=7995, Invalid=45135, Unknown=0, NotChecked=0, Total=53130 [2023-11-29 01:32:14,746 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 348 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 2894 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 3557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 2894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:14,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 169 Invalid, 3557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 2894 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-29 01:32:14,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-11-29 01:32:14,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 139. [2023-11-29 01:32:14,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.2536231884057971) internal successors, (173), 138 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:32:14,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 173 transitions. [2023-11-29 01:32:14,787 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 173 transitions. Word has length 37 [2023-11-29 01:32:14,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:14,787 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 173 transitions. [2023-11-29 01:32:14,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.086021505376344) internal successors, (101), 93 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:32:14,788 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 173 transitions. [2023-11-29 01:32:14,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 01:32:14,788 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:14,788 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:32:14,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 01:32:14,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 01:32:14,989 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:14,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:14,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1760802262, now seen corresponding path program 13 times [2023-11-29 01:32:14,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:14,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481828367] [2023-11-29 01:32:14,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:14,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 01:32:15,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:15,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481828367] [2023-11-29 01:32:15,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481828367] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:32:15,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109251498] [2023-11-29 01:32:15,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:32:15,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:15,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:15,149 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:15,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 01:32:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:15,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 01:32:15,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:15,386 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 01:32:15,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:32:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 01:32:15,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109251498] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:32:15,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:32:15,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-11-29 01:32:15,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207686567] [2023-11-29 01:32:15,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:32:15,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 01:32:15,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:15,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 01:32:15,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-11-29 01:32:15,489 INFO L87 Difference]: Start difference. First operand 139 states and 173 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:32:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:15,849 INFO L93 Difference]: Finished difference Result 181 states and 219 transitions. [2023-11-29 01:32:15,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 01:32:15,849 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-11-29 01:32:15,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:15,850 INFO L225 Difference]: With dead ends: 181 [2023-11-29 01:32:15,850 INFO L226 Difference]: Without dead ends: 170 [2023-11-29 01:32:15,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 56 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 01:32:15,851 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:15,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 30 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:32:15,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-29 01:32:15,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 96. [2023-11-29 01:32:15,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 95 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:32:15,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2023-11-29 01:32:15,892 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 38 [2023-11-29 01:32:15,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:15,892 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2023-11-29 01:32:15,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:32:15,892 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2023-11-29 01:32:15,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 01:32:15,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:15,893 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:32:15,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 01:32:16,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:16,094 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:16,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:16,094 INFO L85 PathProgramCache]: Analyzing trace with hash -714154464, now seen corresponding path program 4 times [2023-11-29 01:32:16,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:16,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792030019] [2023-11-29 01:32:16,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:16,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 38 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:32:16,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:16,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792030019] [2023-11-29 01:32:16,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792030019] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:32:16,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123658215] [2023-11-29 01:32:16,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:32:16,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:16,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:16,359 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:16,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 01:32:16,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:32:16,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:32:16,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 01:32:16,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:16,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 01:32:16,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2023-11-29 01:32:16,568 INFO L349 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2023-11-29 01:32:16,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 37 [2023-11-29 01:32:16,676 INFO L349 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2023-11-29 01:32:16,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 58 [2023-11-29 01:32:16,837 INFO L349 Elim1Store]: treesize reduction 91, result has 33.1 percent of original size [2023-11-29 01:32:16,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 73 treesize of output 86 [2023-11-29 01:32:17,130 INFO L349 Elim1Store]: treesize reduction 91, result has 33.1 percent of original size [2023-11-29 01:32:17,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 111 treesize of output 115 [2023-11-29 01:32:17,495 INFO L349 Elim1Store]: treesize reduction 16, result has 62.8 percent of original size [2023-11-29 01:32:17,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 109 [2023-11-29 01:32:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 51 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:32:17,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:32:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:32:18,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123658215] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:32:18,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:32:18,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 15] total 51 [2023-11-29 01:32:18,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382787941] [2023-11-29 01:32:18,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:32:18,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 01:32:18,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:18,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 01:32:18,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=2225, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 01:32:18,400 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand has 51 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 51 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:32:21,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:21,436 INFO L93 Difference]: Finished difference Result 152 states and 175 transitions. [2023-11-29 01:32:21,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-29 01:32:21,436 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 51 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-29 01:32:21,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:21,437 INFO L225 Difference]: With dead ends: 152 [2023-11-29 01:32:21,437 INFO L226 Difference]: Without dead ends: 120 [2023-11-29 01:32:21,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3501 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1396, Invalid=9946, Unknown=0, NotChecked=0, Total=11342 [2023-11-29 01:32:21,439 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 120 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:21,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 69 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:32:21,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-29 01:32:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 81. [2023-11-29 01:32:21,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.2) internal successors, (96), 80 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:32:21,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2023-11-29 01:32:21,479 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 40 [2023-11-29 01:32:21,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:21,479 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2023-11-29 01:32:21,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 51 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:32:21,479 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2023-11-29 01:32:21,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 01:32:21,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:21,480 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:32:21,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 01:32:21,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:21,680 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:21,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:21,681 INFO L85 PathProgramCache]: Analyzing trace with hash -346286134, now seen corresponding path program 14 times [2023-11-29 01:32:21,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:21,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711276410] [2023-11-29 01:32:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:21,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:21,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 29 proven. 22 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 01:32:21,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:21,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711276410] [2023-11-29 01:32:21,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711276410] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:32:21,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313183171] [2023-11-29 01:32:21,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:32:21,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:21,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:21,878 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:21,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 01:32:21,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:32:21,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:32:21,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 01:32:21,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-29 01:32:22,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:32:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-29 01:32:22,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313183171] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:32:22,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:32:22,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 25 [2023-11-29 01:32:22,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650031369] [2023-11-29 01:32:22,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:32:22,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 01:32:22,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:22,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 01:32:22,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2023-11-29 01:32:22,197 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:32:22,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:22,438 INFO L93 Difference]: Finished difference Result 122 states and 144 transitions. [2023-11-29 01:32:22,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 01:32:22,438 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-29 01:32:22,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:22,439 INFO L225 Difference]: With dead ends: 122 [2023-11-29 01:32:22,439 INFO L226 Difference]: Without dead ends: 55 [2023-11-29 01:32:22,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 61 SyntacticMatches, 11 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2023-11-29 01:32:22,440 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 74 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:22,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 42 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:32:22,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-29 01:32:22,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2023-11-29 01:32:22,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:32:22,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2023-11-29 01:32:22,467 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 40 [2023-11-29 01:32:22,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:22,467 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2023-11-29 01:32:22,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:32:22,467 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2023-11-29 01:32:22,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 01:32:22,467 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:22,467 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:32:22,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 01:32:22,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:22,668 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:22,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:22,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1246167074, now seen corresponding path program 15 times [2023-11-29 01:32:22,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:22,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956133364] [2023-11-29 01:32:22,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:22,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:32:25,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:25,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956133364] [2023-11-29 01:32:25,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956133364] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:32:25,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801940988] [2023-11-29 01:32:25,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:32:25,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:25,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:25,951 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:25,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 01:32:26,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-29 01:32:26,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:32:26,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 98 conjunts are in the unsatisfiable core [2023-11-29 01:32:26,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:26,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:32:26,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:32:26,521 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:32:26,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 01:32:26,663 INFO L349 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2023-11-29 01:32:26,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 41 [2023-11-29 01:32:26,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:26,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:26,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:26,923 INFO L349 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2023-11-29 01:32:26,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 48 treesize of output 51 [2023-11-29 01:32:27,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:27,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:27,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:27,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:27,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:27,233 INFO L349 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2023-11-29 01:32:27,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 59 treesize of output 65 [2023-11-29 01:32:27,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:27,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:27,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:27,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:27,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:27,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:27,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:27,647 INFO L349 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2023-11-29 01:32:27,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 70 treesize of output 79 [2023-11-29 01:32:28,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:32:28,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:32:28,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-11-29 01:32:28,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2023-11-29 01:32:28,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2023-11-29 01:32:29,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2023-11-29 01:32:29,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:29,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:29,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:29,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:29,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:29,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:29,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:29,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:29,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:29,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:29,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:29,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:29,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:29,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:32:29,133 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:32:29,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 35 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 87 treesize of output 111 [2023-11-29 01:32:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 01:32:29,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:32:32,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 160 [2023-11-29 01:32:32,129 INFO L349 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2023-11-29 01:32:32,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 401 treesize of output 374 [2023-11-29 01:32:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 01:32:32,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801940988] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:32:32,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:32:32,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 32, 33] total 96 [2023-11-29 01:32:32,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584590867] [2023-11-29 01:32:32,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:32:32,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-11-29 01:32:32,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:32,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-11-29 01:32:32,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1223, Invalid=7897, Unknown=0, NotChecked=0, Total=9120 [2023-11-29 01:32:32,542 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 96 states, 96 states have (on average 1.125) internal successors, (108), 96 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:33:26,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:26,575 INFO L93 Difference]: Finished difference Result 320 states and 415 transitions. [2023-11-29 01:33:26,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 279 states. [2023-11-29 01:33:26,575 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.125) internal successors, (108), 96 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-11-29 01:33:26,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:26,577 INFO L225 Difference]: With dead ends: 320 [2023-11-29 01:33:26,577 INFO L226 Difference]: Without dead ends: 304 [2023-11-29 01:33:26,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 355 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49983 ImplicationChecksByTransitivity, 56.4s TimeCoverageRelationStatistics Valid=16913, Invalid=110179, Unknown=0, NotChecked=0, Total=127092 [2023-11-29 01:33:26,585 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 606 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2052 mSolverCounterSat, 1034 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 3086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1034 IncrementalHoareTripleChecker+Valid, 2052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:26,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 109 Invalid, 3086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1034 Valid, 2052 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-29 01:33:26,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-11-29 01:33:26,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 232. [2023-11-29 01:33:26,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.3463203463203464) internal successors, (311), 231 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:33:26,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 311 transitions. [2023-11-29 01:33:26,741 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 311 transitions. Word has length 42 [2023-11-29 01:33:26,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:26,741 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 311 transitions. [2023-11-29 01:33:26,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.125) internal successors, (108), 96 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:33:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 311 transitions. [2023-11-29 01:33:26,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 01:33:26,742 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:26,742 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:33:26,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 01:33:26,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:26,942 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:33:26,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:26,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1460415646, now seen corresponding path program 16 times [2023-11-29 01:33:26,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:26,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525318492] [2023-11-29 01:33:26,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:26,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-29 01:33:27,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:27,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525318492] [2023-11-29 01:33:27,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525318492] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:33:27,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651715860] [2023-11-29 01:33:27,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:33:27,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:27,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:27,208 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:27,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 01:33:27,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:33:27,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:33:27,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 01:33:27,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 01:33:27,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:33:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 01:33:27,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651715860] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:33:27,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:33:27,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2023-11-29 01:33:27,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098728247] [2023-11-29 01:33:27,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:33:27,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 01:33:27,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:27,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 01:33:27,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2023-11-29 01:33:27,575 INFO L87 Difference]: Start difference. First operand 232 states and 311 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:33:27,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:27,976 INFO L93 Difference]: Finished difference Result 272 states and 353 transitions. [2023-11-29 01:33:27,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 01:33:27,976 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-11-29 01:33:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:27,977 INFO L225 Difference]: With dead ends: 272 [2023-11-29 01:33:27,977 INFO L226 Difference]: Without dead ends: 138 [2023-11-29 01:33:27,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 67 SyntacticMatches, 13 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=843, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 01:33:27,978 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 63 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:27,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 65 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:33:27,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-29 01:33:28,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 119. [2023-11-29 01:33:28,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.3220338983050848) internal successors, (156), 118 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:33:28,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 156 transitions. [2023-11-29 01:33:28,075 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 156 transitions. Word has length 44 [2023-11-29 01:33:28,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:28,075 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 156 transitions. [2023-11-29 01:33:28,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:33:28,076 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 156 transitions. [2023-11-29 01:33:28,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 01:33:28,076 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:28,076 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:33:28,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 01:33:28,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:28,277 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:33:28,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:28,277 INFO L85 PathProgramCache]: Analyzing trace with hash 308437528, now seen corresponding path program 17 times [2023-11-29 01:33:28,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:28,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153973618] [2023-11-29 01:33:28,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:28,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:32,268 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:33:32,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:32,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153973618] [2023-11-29 01:33:32,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153973618] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:33:32,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47151761] [2023-11-29 01:33:32,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:33:32,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:32,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:32,269 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:32,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 01:33:33,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-29 01:33:33,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:33:33,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 101 conjunts are in the unsatisfiable core [2023-11-29 01:33:33,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:33,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:33:33,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:33:33,659 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:33:33,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 01:33:33,836 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:33:33,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2023-11-29 01:33:34,043 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:33:34,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 41 [2023-11-29 01:33:34,276 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:33:34,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 51 [2023-11-29 01:33:34,580 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:33:34,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 61 [2023-11-29 01:33:34,903 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:33:34,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 71 [2023-11-29 01:33:35,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:33:35,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:33:35,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:33:35,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:33:35,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:33:35,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:33:35,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:33:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 01:33:36,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:33:42,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 984 treesize of output 942 [2023-11-29 01:33:43,837 INFO L349 Elim1Store]: treesize reduction 210, result has 51.7 percent of original size [2023-11-29 01:33:43,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 22868524609009642 treesize of output 22639826190432410 [2023-11-29 01:33:56,664 WARN L293 SmtUtils]: Spent 12.79s on a formula simplification. DAG size of input: 8945 DAG size of output: 175 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:33:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 01:33:57,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47151761] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:33:57,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:33:57,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 35, 35] total 106 [2023-11-29 01:33:57,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636388193] [2023-11-29 01:33:57,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:33:57,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2023-11-29 01:33:57,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:57,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2023-11-29 01:33:57,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1073, Invalid=10057, Unknown=0, NotChecked=0, Total=11130 [2023-11-29 01:33:57,347 INFO L87 Difference]: Start difference. First operand 119 states and 156 transitions. Second operand has 106 states, 106 states have (on average 1.1132075471698113) internal successors, (118), 106 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:35:21,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:35:21,062 INFO L93 Difference]: Finished difference Result 494 states and 677 transitions. [2023-11-29 01:35:21,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2023-11-29 01:35:21,063 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.1132075471698113) internal successors, (118), 106 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-11-29 01:35:21,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:35:21,065 INFO L225 Difference]: With dead ends: 494 [2023-11-29 01:35:21,065 INFO L226 Difference]: Without dead ends: 476 [2023-11-29 01:35:21,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18612 ImplicationChecksByTransitivity, 83.5s TimeCoverageRelationStatistics Valid=6776, Invalid=51064, Unknown=0, NotChecked=0, Total=57840 [2023-11-29 01:35:21,068 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 452 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 3549 mSolverCounterSat, 901 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 4450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 901 IncrementalHoareTripleChecker+Valid, 3549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:35:21,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 268 Invalid, 4450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [901 Valid, 3549 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2023-11-29 01:35:21,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2023-11-29 01:35:21,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 420. [2023-11-29 01:35:21,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.3770883054892602) internal successors, (577), 419 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:35:21,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 577 transitions. [2023-11-29 01:35:21,453 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 577 transitions. Word has length 47 [2023-11-29 01:35:21,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:35:21,453 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 577 transitions. [2023-11-29 01:35:21,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.1132075471698113) internal successors, (118), 106 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:35:21,454 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 577 transitions. [2023-11-29 01:35:21,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 01:35:21,455 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:35:21,455 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:35:21,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 01:35:21,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:21,655 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:35:21,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:35:21,655 INFO L85 PathProgramCache]: Analyzing trace with hash 731139354, now seen corresponding path program 5 times [2023-11-29 01:35:21,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:35:21,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40147087] [2023-11-29 01:35:21,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:21,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:35:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:35:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 37 proven. 54 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 01:35:22,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:35:22,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40147087] [2023-11-29 01:35:22,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40147087] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:35:22,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486575076] [2023-11-29 01:35:22,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:35:22,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:22,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:35:22,224 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:35:22,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 01:35:26,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-29 01:35:26,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:35:26,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 01:35:26,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:35:26,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:35:26,559 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-29 01:35:26,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2023-11-29 01:35:26,591 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-29 01:35:26,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2023-11-29 01:35:26,636 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:35:26,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2023-11-29 01:35:26,665 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:35:26,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2023-11-29 01:35:26,697 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:35:26,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2023-11-29 01:35:26,730 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:35:26,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2023-11-29 01:35:26,774 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 38 proven. 53 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 01:35:26,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:35:27,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-11-29 01:35:27,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-29 01:35:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 37 proven. 54 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 01:35:27,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486575076] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:35:27,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:35:27,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2023-11-29 01:35:27,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080388466] [2023-11-29 01:35:27,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:35:27,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 01:35:27,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:35:27,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 01:35:27,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 01:35:27,044 INFO L87 Difference]: Start difference. First operand 420 states and 577 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:35:27,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:35:27,887 INFO L93 Difference]: Finished difference Result 615 states and 843 transitions. [2023-11-29 01:35:27,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 01:35:27,888 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-11-29 01:35:27,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:35:27,889 INFO L225 Difference]: With dead ends: 615 [2023-11-29 01:35:27,889 INFO L226 Difference]: Without dead ends: 407 [2023-11-29 01:35:27,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 01:35:27,890 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:35:27,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 117 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:35:27,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2023-11-29 01:35:28,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 392. [2023-11-29 01:35:28,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 1.3682864450127876) internal successors, (535), 391 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:35:28,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 535 transitions. [2023-11-29 01:35:28,277 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 535 transitions. Word has length 47 [2023-11-29 01:35:28,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:35:28,277 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 535 transitions. [2023-11-29 01:35:28,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:35:28,277 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 535 transitions. [2023-11-29 01:35:28,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-29 01:35:28,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:35:28,278 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:35:28,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 01:35:28,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 01:35:28,479 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:35:28,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:35:28,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1023087044, now seen corresponding path program 18 times [2023-11-29 01:35:28,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:35:28,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757655259] [2023-11-29 01:35:28,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:28,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:35:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:35:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-29 01:35:28,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:35:28,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757655259] [2023-11-29 01:35:28,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757655259] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:35:28,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420998104] [2023-11-29 01:35:28,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:35:28,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:28,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:35:28,707 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:35:28,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 01:35:29,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-29 01:35:29,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:35:29,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 01:35:29,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:35:29,619 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 50 proven. 36 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-29 01:35:29,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:35:29,790 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-29 01:35:29,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420998104] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:35:29,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:35:29,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 21] total 33 [2023-11-29 01:35:29,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639586291] [2023-11-29 01:35:29,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:35:29,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 01:35:29,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:35:29,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 01:35:29,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 01:35:29,792 INFO L87 Difference]: Start difference. First operand 392 states and 535 transitions. Second operand has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:35:30,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:35:30,788 INFO L93 Difference]: Finished difference Result 445 states and 592 transitions. [2023-11-29 01:35:30,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 01:35:30,789 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-11-29 01:35:30,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:35:30,791 INFO L225 Difference]: With dead ends: 445 [2023-11-29 01:35:30,791 INFO L226 Difference]: Without dead ends: 424 [2023-11-29 01:35:30,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 71 SyntacticMatches, 17 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 01:35:30,792 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 106 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:35:30,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 28 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:35:30,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-11-29 01:35:30,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 103. [2023-11-29 01:35:30,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1666666666666667) internal successors, (119), 102 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:35:30,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 119 transitions. [2023-11-29 01:35:30,941 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 119 transitions. Word has length 51 [2023-11-29 01:35:30,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:35:30,941 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 119 transitions. [2023-11-29 01:35:30,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:35:30,942 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 119 transitions. [2023-11-29 01:35:30,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-29 01:35:30,942 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:35:30,942 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:35:30,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 01:35:31,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 01:35:31,143 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:35:31,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:35:31,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1673774110, now seen corresponding path program 19 times [2023-11-29 01:35:31,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:35:31,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103936556] [2023-11-29 01:35:31,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:31,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:35:31,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:35:35,864 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:35:35,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:35:35,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103936556] [2023-11-29 01:35:35,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103936556] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:35:35,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934918876] [2023-11-29 01:35:35,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:35:35,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:35,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:35:35,865 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:35:35,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 01:35:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:35:36,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 129 conjunts are in the unsatisfiable core [2023-11-29 01:35:36,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:35:36,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:35:36,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:35:36,347 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:35:36,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 01:35:36,540 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:35:36,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2023-11-29 01:35:36,761 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:35:36,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 41 [2023-11-29 01:35:37,043 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:35:37,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 51 [2023-11-29 01:35:37,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:35:37,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 61 [2023-11-29 01:35:37,688 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:35:37,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 71 [2023-11-29 01:35:38,083 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:35:38,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 81 [2023-11-29 01:35:38,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:35:38,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:35:38,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:35:38,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:35:38,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:35:39,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:35:39,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:35:39,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:35:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:35:39,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:35:47,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 672 treesize of output 640 [2023-11-29 01:35:50,119 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:35:50,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input -973912213873918388 treesize of output -3135640035011755955 [2023-11-29 01:39:06,704 WARN L293 SmtUtils]: Spent 3.28m on a formula simplification. DAG size of input: 10485 DAG size of output: 248 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:39:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:39:11,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934918876] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:39:11,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:39:11,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 46, 46] total 124 [2023-11-29 01:39:11,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270094816] [2023-11-29 01:39:11,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:39:11,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2023-11-29 01:39:11,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:39:11,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2023-11-29 01:39:11,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1451, Invalid=13801, Unknown=0, NotChecked=0, Total=15252 [2023-11-29 01:39:11,491 INFO L87 Difference]: Start difference. First operand 103 states and 119 transitions. Second operand has 124 states, 124 states have (on average 1.0887096774193548) internal successors, (135), 124 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:40:12,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:40:12,458 INFO L93 Difference]: Finished difference Result 283 states and 349 transitions. [2023-11-29 01:40:12,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2023-11-29 01:40:12,458 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.0887096774193548) internal successors, (135), 124 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-11-29 01:40:12,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:40:12,460 INFO L225 Difference]: With dead ends: 283 [2023-11-29 01:40:12,460 INFO L226 Difference]: Without dead ends: 255 [2023-11-29 01:40:12,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12316 ImplicationChecksByTransitivity, 59.0s TimeCoverageRelationStatistics Valid=4912, Invalid=36094, Unknown=0, NotChecked=0, Total=41006 [2023-11-29 01:40:12,463 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 151 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 5960 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 6278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 5960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:40:12,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 243 Invalid, 6278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 5960 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time] [2023-11-29 01:40:12,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2023-11-29 01:40:12,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 180. [2023-11-29 01:40:12,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.217877094972067) internal successors, (218), 179 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:40:12,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 218 transitions. [2023-11-29 01:40:12,697 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 218 transitions. Word has length 52 [2023-11-29 01:40:12,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:40:12,698 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 218 transitions. [2023-11-29 01:40:12,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.0887096774193548) internal successors, (135), 124 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:40:12,698 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 218 transitions. [2023-11-29 01:40:12,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-29 01:40:12,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:40:12,698 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:40:12,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 01:40:12,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 01:40:12,899 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:40:12,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:40:12,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1892628828, now seen corresponding path program 6 times [2023-11-29 01:40:12,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:40:12,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270142112] [2023-11-29 01:40:12,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:40:12,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:40:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:40:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 21 proven. 107 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 01:40:13,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:40:13,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270142112] [2023-11-29 01:40:13,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270142112] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:40:13,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479332437] [2023-11-29 01:40:13,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:40:13,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:40:13,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:40:13,739 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:40:13,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 01:40:14,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-29 01:40:14,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:40:14,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 01:40:14,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:40:15,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:40:15,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 01:40:15,110 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-29 01:40:15,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2023-11-29 01:40:15,177 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:40:15,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2023-11-29 01:40:15,221 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:40:15,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2023-11-29 01:40:15,275 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:40:15,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2023-11-29 01:40:15,330 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:40:15,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2023-11-29 01:40:15,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:40:15,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2023-11-29 01:40:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-11-29 01:40:15,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:40:15,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2023-11-29 01:40:15,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 198 treesize of output 190 [2023-11-29 01:40:15,887 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-11-29 01:40:15,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479332437] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:40:15,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:40:15,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 18] total 45 [2023-11-29 01:40:15,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809194447] [2023-11-29 01:40:15,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:40:15,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 01:40:15,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:40:15,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 01:40:15,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1738, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 01:40:15,889 INFO L87 Difference]: Start difference. First operand 180 states and 218 transitions. Second operand has 45 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 45 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:40:17,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:40:17,482 INFO L93 Difference]: Finished difference Result 234 states and 280 transitions. [2023-11-29 01:40:17,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 01:40:17,483 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 45 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-11-29 01:40:17,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:40:17,484 INFO L225 Difference]: With dead ends: 234 [2023-11-29 01:40:17,484 INFO L226 Difference]: Without dead ends: 199 [2023-11-29 01:40:17,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=509, Invalid=3397, Unknown=0, NotChecked=0, Total=3906 [2023-11-29 01:40:17,484 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 43 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:40:17,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 117 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 01:40:17,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-11-29 01:40:17,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 180. [2023-11-29 01:40:17,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.2011173184357542) internal successors, (215), 179 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:40:17,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 215 transitions. [2023-11-29 01:40:17,715 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 215 transitions. Word has length 52 [2023-11-29 01:40:17,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:40:17,715 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 215 transitions. [2023-11-29 01:40:17,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 45 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:40:17,715 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 215 transitions. [2023-11-29 01:40:17,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 01:40:17,716 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:40:17,716 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:40:17,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 01:40:17,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 01:40:17,916 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:40:17,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:40:17,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1001111052, now seen corresponding path program 20 times [2023-11-29 01:40:17,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:40:17,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901176246] [2023-11-29 01:40:17,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:40:17,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:40:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:40:18,256 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 28 proven. 109 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 01:40:18,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:40:18,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901176246] [2023-11-29 01:40:18,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901176246] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:40:18,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313864923] [2023-11-29 01:40:18,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:40:18,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:40:18,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:40:18,258 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:40:18,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 01:40:18,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:40:18,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:40:18,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 01:40:18,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:40:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 36 proven. 101 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 01:40:18,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:40:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 36 proven. 101 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 01:40:18,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313864923] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:40:18,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:40:18,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-11-29 01:40:18,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288323011] [2023-11-29 01:40:18,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:40:18,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 01:40:18,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:40:18,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 01:40:18,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-11-29 01:40:18,918 INFO L87 Difference]: Start difference. First operand 180 states and 215 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:40:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:40:19,969 INFO L93 Difference]: Finished difference Result 246 states and 290 transitions. [2023-11-29 01:40:19,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 01:40:19,969 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-11-29 01:40:19,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:40:19,970 INFO L225 Difference]: With dead ends: 246 [2023-11-29 01:40:19,971 INFO L226 Difference]: Without dead ends: 232 [2023-11-29 01:40:19,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 77 SyntacticMatches, 18 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=538, Invalid=1912, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 01:40:19,972 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:40:19,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 28 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:40:19,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-11-29 01:40:20,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 146. [2023-11-29 01:40:20,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.1655172413793105) internal successors, (169), 145 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:40:20,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 169 transitions. [2023-11-29 01:40:20,176 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 169 transitions. Word has length 53 [2023-11-29 01:40:20,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:40:20,176 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 169 transitions. [2023-11-29 01:40:20,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:40:20,176 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 169 transitions. [2023-11-29 01:40:20,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 01:40:20,176 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:40:20,176 INFO L195 NwaCegarLoop]: trace histogram [15, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:40:20,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 01:40:20,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 01:40:20,377 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:40:20,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:40:20,377 INFO L85 PathProgramCache]: Analyzing trace with hash -364045544, now seen corresponding path program 21 times [2023-11-29 01:40:20,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:40:20,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460335074] [2023-11-29 01:40:20,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:40:20,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:40:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:40:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 106 proven. 42 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-29 01:40:20,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:40:20,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460335074] [2023-11-29 01:40:20,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460335074] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:40:20,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347311435] [2023-11-29 01:40:20,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:40:20,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:40:20,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:40:20,766 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:40:20,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 01:40:22,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-29 01:40:22,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:40:22,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 01:40:22,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:40:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 111 proven. 28 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-11-29 01:40:22,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:40:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 84 proven. 83 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-29 01:40:22,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347311435] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:40:22,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:40:22,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21, 24] total 43 [2023-11-29 01:40:22,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996480864] [2023-11-29 01:40:22,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:40:22,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 01:40:22,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:40:22,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 01:40:22,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1391, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 01:40:22,943 INFO L87 Difference]: Start difference. First operand 146 states and 169 transitions. Second operand has 43 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 43 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:40:23,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:40:23,647 INFO L93 Difference]: Finished difference Result 190 states and 221 transitions. [2023-11-29 01:40:23,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 01:40:23,648 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 43 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-29 01:40:23,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:40:23,649 INFO L225 Difference]: With dead ends: 190 [2023-11-29 01:40:23,649 INFO L226 Difference]: Without dead ends: 123 [2023-11-29 01:40:23,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 77 SyntacticMatches, 16 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1733 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=909, Invalid=3381, Unknown=0, NotChecked=0, Total=4290 [2023-11-29 01:40:23,650 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 125 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:40:23,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 35 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:40:23,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-11-29 01:40:23,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 115. [2023-11-29 01:40:23,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:40:23,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2023-11-29 01:40:23,851 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 55 [2023-11-29 01:40:23,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:40:23,851 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2023-11-29 01:40:23,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 43 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:40:23,851 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2023-11-29 01:40:23,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 01:40:23,852 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:40:23,852 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:40:23,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-29 01:40:24,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:40:24,053 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:40:24,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:40:24,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1284165996, now seen corresponding path program 7 times [2023-11-29 01:40:24,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:40:24,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788547546] [2023-11-29 01:40:24,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:40:24,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:40:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:40:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 95 proven. 58 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 01:40:24,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:40:24,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788547546] [2023-11-29 01:40:24,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788547546] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:40:24,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600076054] [2023-11-29 01:40:24,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:40:24,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:40:24,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:40:24,344 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:40:24,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 01:40:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:40:24,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 01:40:24,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:40:24,819 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 117 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 01:40:24,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:40:24,995 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 117 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 01:40:24,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600076054] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:40:24,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:40:24,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-11-29 01:40:24,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478019535] [2023-11-29 01:40:24,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:40:24,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 01:40:24,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:40:24,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 01:40:24,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-11-29 01:40:24,997 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 32 states, 32 states have (on average 2.5) internal successors, (80), 32 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:40:25,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:40:25,561 INFO L93 Difference]: Finished difference Result 160 states and 187 transitions. [2023-11-29 01:40:25,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 01:40:25,562 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.5) internal successors, (80), 32 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-29 01:40:25,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:40:25,562 INFO L225 Difference]: With dead ends: 160 [2023-11-29 01:40:25,563 INFO L226 Difference]: Without dead ends: 70 [2023-11-29 01:40:25,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 84 SyntacticMatches, 17 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 01:40:25,564 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 91 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:40:25,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 28 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:40:25,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-29 01:40:25,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 58. [2023-11-29 01:40:25,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.105263157894737) internal successors, (63), 57 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:40:25,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2023-11-29 01:40:25,697 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 56 [2023-11-29 01:40:25,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:40:25,697 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2023-11-29 01:40:25,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.5) internal successors, (80), 32 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:40:25,697 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2023-11-29 01:40:25,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-29 01:40:25,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:40:25,698 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:40:25,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 01:40:25,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 01:40:25,898 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:40:25,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:40:25,899 INFO L85 PathProgramCache]: Analyzing trace with hash 109375960, now seen corresponding path program 22 times [2023-11-29 01:40:25,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:40:25,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423468462] [2023-11-29 01:40:25,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:40:25,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:40:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:40:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:40:32,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:40:32,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423468462] [2023-11-29 01:40:32,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423468462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:40:32,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17164676] [2023-11-29 01:40:32,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:40:32,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:40:32,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:40:32,810 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:40:32,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 01:40:33,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:40:33,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:40:33,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 143 conjunts are in the unsatisfiable core [2023-11-29 01:40:33,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:40:33,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:40:33,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:40:33,771 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:40:33,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 01:40:34,011 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:40:34,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2023-11-29 01:40:34,280 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:40:34,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 41 [2023-11-29 01:40:34,593 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:40:34,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 51 [2023-11-29 01:40:34,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:40:34,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 61 [2023-11-29 01:40:35,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:40:35,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 71 [2023-11-29 01:40:35,719 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:40:35,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 81 [2023-11-29 01:40:36,251 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:40:36,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 91 [2023-11-29 01:40:36,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:40:36,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:40:36,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:40:37,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:40:37,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:40:37,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:40:37,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:40:37,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:40:37,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:40:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:40:38,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:40:50,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 827 treesize of output 791 [2023-11-29 01:40:57,684 WARN L293 SmtUtils]: Spent 6.35s on a formula simplification that was a NOOP. DAG size: 297 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-11-29 01:40:57,685 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:40:57,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input -182450348147865897 treesize of output -182450348147865239 [2023-11-29 01:42:33,642 WARN L293 SmtUtils]: Spent 1.60m on a formula simplification. DAG size of input: 23342 DAG size of output: 288 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:42:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:42:41,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17164676] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:42:41,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:42:41,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 51, 51] total 138 [2023-11-29 01:42:41,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716506091] [2023-11-29 01:42:41,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:42:41,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2023-11-29 01:42:41,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:42:41,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2023-11-29 01:42:41,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1781, Invalid=17125, Unknown=0, NotChecked=0, Total=18906 [2023-11-29 01:42:41,479 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 138 states, 138 states have (on average 1.0797101449275361) internal successors, (149), 138 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:43:09,082 WARN L293 SmtUtils]: Spent 6.37s on a formula simplification. DAG size of input: 319 DAG size of output: 179 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:45:02,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:45:02,166 INFO L93 Difference]: Finished difference Result 234 states and 289 transitions. [2023-11-29 01:45:02,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2023-11-29 01:45:02,167 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.0797101449275361) internal successors, (149), 138 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-11-29 01:45:02,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:45:02,168 INFO L225 Difference]: With dead ends: 234 [2023-11-29 01:45:02,168 INFO L226 Difference]: Without dead ends: 204 [2023-11-29 01:45:02,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13623 ImplicationChecksByTransitivity, 138.4s TimeCoverageRelationStatistics Valid=5715, Invalid=39867, Unknown=0, NotChecked=0, Total=45582 [2023-11-29 01:45:02,170 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 185 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 4378 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 4800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 4378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:45:02,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 228 Invalid, 4800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 4378 Invalid, 0 Unknown, 0 Unchecked, 20.9s Time] [2023-11-29 01:45:02,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-11-29 01:45:02,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 141. [2023-11-29 01:45:02,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.207142857142857) internal successors, (169), 140 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:45:02,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 169 transitions. [2023-11-29 01:45:02,409 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 169 transitions. Word has length 57 [2023-11-29 01:45:02,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:45:02,409 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 169 transitions. [2023-11-29 01:45:02,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 1.0797101449275361) internal successors, (149), 138 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:45:02,409 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 169 transitions. [2023-11-29 01:45:02,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-29 01:45:02,409 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:45:02,409 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:45:02,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 01:45:02,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 01:45:02,610 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:45:02,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:45:02,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1696062374, now seen corresponding path program 8 times [2023-11-29 01:45:02,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:45:02,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053067256] [2023-11-29 01:45:02,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:02,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:45:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:45:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 53 proven. 102 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:45:03,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:45:03,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053067256] [2023-11-29 01:45:03,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053067256] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:45:03,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490636642] [2023-11-29 01:45:03,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:45:03,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:03,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:45:03,333 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:45:03,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 01:45:03,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:45:03,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:45:03,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 75 conjunts are in the unsatisfiable core [2023-11-29 01:45:03,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:45:03,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:45:03,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 01:45:03,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 01:45:03,845 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:45:03,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-11-29 01:45:03,898 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:45:03,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-11-29 01:45:03,957 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:45:03,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-11-29 01:45:04,008 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:45:04,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-11-29 01:45:04,062 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:45:04,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-11-29 01:45:04,115 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:45:04,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-11-29 01:45:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 53 proven. 102 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:45:04,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:45:04,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2023-11-29 01:45:04,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 86 [2023-11-29 01:45:04,387 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 53 proven. 102 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:45:04,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490636642] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:45:04,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:45:04,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 40 [2023-11-29 01:45:04,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860248865] [2023-11-29 01:45:04,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:45:04,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-29 01:45:04,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:45:04,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-29 01:45:04,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1405, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 01:45:04,389 INFO L87 Difference]: Start difference. First operand 141 states and 169 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:45:05,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:45:05,396 INFO L93 Difference]: Finished difference Result 172 states and 203 transitions. [2023-11-29 01:45:05,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 01:45:05,397 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-11-29 01:45:05,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:45:05,398 INFO L225 Difference]: With dead ends: 172 [2023-11-29 01:45:05,398 INFO L226 Difference]: Without dead ends: 149 [2023-11-29 01:45:05,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 01:45:05,398 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:45:05,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 147 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 01:45:05,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-29 01:45:05,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 141. [2023-11-29 01:45:05,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 140 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:45:05,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 167 transitions. [2023-11-29 01:45:05,639 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 167 transitions. Word has length 57 [2023-11-29 01:45:05,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:45:05,639 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 167 transitions. [2023-11-29 01:45:05,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:45:05,639 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 167 transitions. [2023-11-29 01:45:05,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-29 01:45:05,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:45:05,639 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:45:05,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 01:45:05,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 01:45:05,840 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:45:05,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:45:05,840 INFO L85 PathProgramCache]: Analyzing trace with hash -2083390294, now seen corresponding path program 23 times [2023-11-29 01:45:05,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:45:05,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376370487] [2023-11-29 01:45:05,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:05,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:45:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:45:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 36 proven. 136 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 01:45:06,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:45:06,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376370487] [2023-11-29 01:45:06,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376370487] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:45:06,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819518961] [2023-11-29 01:45:06,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:45:06,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:06,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:45:06,170 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:45:06,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 01:45:14,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-11-29 01:45:14,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:45:14,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 01:45:14,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:45:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-29 01:45:14,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:45:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-29 01:45:15,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819518961] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:45:15,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:45:15,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-11-29 01:45:15,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588641624] [2023-11-29 01:45:15,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:45:15,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 01:45:15,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:45:15,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 01:45:15,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 01:45:15,134 INFO L87 Difference]: Start difference. First operand 141 states and 167 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:45:16,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:45:16,254 INFO L93 Difference]: Finished difference Result 193 states and 227 transitions. [2023-11-29 01:45:16,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 01:45:16,255 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-11-29 01:45:16,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:45:16,255 INFO L225 Difference]: With dead ends: 193 [2023-11-29 01:45:16,255 INFO L226 Difference]: Without dead ends: 178 [2023-11-29 01:45:16,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 84 SyntacticMatches, 20 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=646, Invalid=2324, Unknown=0, NotChecked=0, Total=2970 [2023-11-29 01:45:16,256 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 105 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:45:16,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 38 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:45:16,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-11-29 01:45:16,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 129. [2023-11-29 01:45:16,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.171875) internal successors, (150), 128 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:45:16,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2023-11-29 01:45:16,473 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 58 [2023-11-29 01:45:16,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:45:16,473 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2023-11-29 01:45:16,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:45:16,473 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2023-11-29 01:45:16,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-29 01:45:16,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:45:16,473 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:45:16,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 01:45:16,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-29 01:45:16,674 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:45:16,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:45:16,674 INFO L85 PathProgramCache]: Analyzing trace with hash -161414070, now seen corresponding path program 9 times [2023-11-29 01:45:16,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:45:16,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727706455] [2023-11-29 01:45:16,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:16,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:45:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:45:16,995 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 120 proven. 70 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 01:45:16,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:45:16,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727706455] [2023-11-29 01:45:16,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727706455] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:45:16,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974827892] [2023-11-29 01:45:16,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:45:16,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:16,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:45:16,996 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:45:16,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 01:45:17,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 01:45:17,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:45:17,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 01:45:17,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:45:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-29 01:45:17,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:45:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-29 01:45:18,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974827892] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:45:18,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:45:18,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-11-29 01:45:18,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315361884] [2023-11-29 01:45:18,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:45:18,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 01:45:18,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:45:18,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 01:45:18,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 01:45:18,109 INFO L87 Difference]: Start difference. First operand 129 states and 150 transitions. Second operand has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:45:18,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:45:18,630 INFO L93 Difference]: Finished difference Result 175 states and 204 transitions. [2023-11-29 01:45:18,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 01:45:18,630 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-11-29 01:45:18,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:45:18,631 INFO L225 Difference]: With dead ends: 175 [2023-11-29 01:45:18,631 INFO L226 Difference]: Without dead ends: 75 [2023-11-29 01:45:18,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 91 SyntacticMatches, 19 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 01:45:18,632 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 118 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:45:18,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 34 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:45:18,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-29 01:45:18,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2023-11-29 01:45:18,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.096774193548387) internal successors, (68), 62 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:45:18,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2023-11-29 01:45:18,778 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 61 [2023-11-29 01:45:18,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:45:18,778 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2023-11-29 01:45:18,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:45:18,778 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2023-11-29 01:45:18,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-29 01:45:18,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:45:18,778 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:45:18,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 01:45:18,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 01:45:18,979 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:45:18,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:45:18,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1515898786, now seen corresponding path program 24 times [2023-11-29 01:45:18,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:45:18,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345612315] [2023-11-29 01:45:18,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:18,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:45:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:45:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:45:25,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:45:25,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345612315] [2023-11-29 01:45:25,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345612315] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:45:25,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634734952] [2023-11-29 01:45:25,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:45:25,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:25,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:45:25,797 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:45:25,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a1fbc0-3e12-41f5-98ed-269471ee43df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 01:45:27,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-11-29 01:45:27,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:45:27,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 155 conjunts are in the unsatisfiable core [2023-11-29 01:45:27,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:45:27,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:45:27,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:45:28,187 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:45:28,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 01:45:28,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:45:28,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2023-11-29 01:45:28,959 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:45:28,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 41 [2023-11-29 01:45:29,465 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:45:29,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 51 [2023-11-29 01:45:29,963 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:45:29,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 61 [2023-11-29 01:45:30,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:45:30,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 71 [2023-11-29 01:45:31,030 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:45:31,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 81 [2023-11-29 01:45:31,666 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:45:31,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 91 [2023-11-29 01:45:32,323 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:45:32,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 82 treesize of output 101