./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/mapavg4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/mapavg4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx --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 98bc833889bf97eabed50b7ee23613fe9d5db74d8eb864c2f87c567c38e52240 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 20:59:29,506 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 20:59:29,624 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 20:59:29,631 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 20:59:29,632 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 20:59:29,673 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 20:59:29,674 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 20:59:29,674 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 20:59:29,676 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 20:59:29,678 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 20:59:29,679 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 20:59:29,679 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 20:59:29,680 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 20:59:29,681 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 20:59:29,681 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 20:59:29,682 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 20:59:29,683 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 20:59:29,683 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 20:59:29,683 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 20:59:29,684 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 20:59:29,684 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 20:59:29,686 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 20:59:29,687 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 20:59:29,688 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 20:59:29,688 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 20:59:29,689 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 20:59:29,689 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 20:59:29,690 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 20:59:29,691 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 20:59:29,691 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 20:59:29,693 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 20:59:29,693 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:59:29,694 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 20:59:29,694 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 20:59:29,694 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 20:59:29,695 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 20:59:29,695 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 20:59:29,695 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 20:59:29,696 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 20:59:29,696 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 20:59:29,696 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 20:59:29,697 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 20:59:29,697 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_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98bc833889bf97eabed50b7ee23613fe9d5db74d8eb864c2f87c567c38e52240 [2023-11-21 20:59:30,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 20:59:30,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 20:59:30,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 20:59:30,035 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 20:59:30,036 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 20:59:30,038 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/array-crafted/mapavg4.i [2023-11-21 20:59:33,203 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 20:59:33,411 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 20:59:33,411 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/sv-benchmarks/c/array-crafted/mapavg4.i [2023-11-21 20:59:33,419 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/data/4da2fd5ba/d83ae2d6625a4224963c5181cc2fc0ae/FLAGa758abe49 [2023-11-21 20:59:33,435 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/data/4da2fd5ba/d83ae2d6625a4224963c5181cc2fc0ae [2023-11-21 20:59:33,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 20:59:33,440 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 20:59:33,442 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 20:59:33,442 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 20:59:33,448 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 20:59:33,449 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:59:33" (1/1) ... [2023-11-21 20:59:33,450 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b10f5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:33, skipping insertion in model container [2023-11-21 20:59:33,451 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:59:33" (1/1) ... [2023-11-21 20:59:33,474 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 20:59:33,673 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_66954cf7-dd3a-430a-95b8-2d6226243f01/sv-benchmarks/c/array-crafted/mapavg4.i[1327,1340] [2023-11-21 20:59:33,678 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:59:33,689 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 20:59:33,730 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_66954cf7-dd3a-430a-95b8-2d6226243f01/sv-benchmarks/c/array-crafted/mapavg4.i[1327,1340] [2023-11-21 20:59:33,731 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:59:33,748 INFO L206 MainTranslator]: Completed translation [2023-11-21 20:59:33,748 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:33 WrapperNode [2023-11-21 20:59:33,749 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 20:59:33,750 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 20:59:33,750 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 20:59:33,750 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 20:59:33,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:33" (1/1) ... [2023-11-21 20:59:33,783 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:33" (1/1) ... [2023-11-21 20:59:33,820 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-11-21 20:59:33,820 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 20:59:33,821 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 20:59:33,821 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 20:59:33,822 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 20:59:33,833 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:33" (1/1) ... [2023-11-21 20:59:33,833 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:33" (1/1) ... [2023-11-21 20:59:33,836 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:33" (1/1) ... [2023-11-21 20:59:33,865 INFO L187 HeapSplitter]: Split 12 memory accesses to 2 slices as follows [2, 10] [2023-11-21 20:59:33,865 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:33" (1/1) ... [2023-11-21 20:59:33,866 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:33" (1/1) ... [2023-11-21 20:59:33,881 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:33" (1/1) ... [2023-11-21 20:59:33,892 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:33" (1/1) ... [2023-11-21 20:59:33,893 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:33" (1/1) ... [2023-11-21 20:59:33,895 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:33" (1/1) ... [2023-11-21 20:59:33,897 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 20:59:33,899 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 20:59:33,900 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 20:59:33,901 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 20:59:33,902 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:33" (1/1) ... [2023-11-21 20:59:33,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:59:33,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:59:33,946 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 20:59:33,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 20:59:33,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 20:59:33,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 20:59:33,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-21 20:59:33,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 20:59:33,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-21 20:59:33,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-21 20:59:33,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 20:59:33,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 20:59:33,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-21 20:59:33,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-21 20:59:33,997 INFO L130 BoogieDeclarations]: Found specification of procedure mapavg [2023-11-21 20:59:33,997 INFO L138 BoogieDeclarations]: Found implementation of procedure mapavg [2023-11-21 20:59:33,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 20:59:34,132 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 20:59:34,134 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 20:59:34,298 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 20:59:34,356 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 20:59:34,356 INFO L308 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-21 20:59:34,358 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:59:34 BoogieIcfgContainer [2023-11-21 20:59:34,359 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 20:59:34,363 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 20:59:34,363 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 20:59:34,367 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 20:59:34,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 08:59:33" (1/3) ... [2023-11-21 20:59:34,368 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5055885c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:59:34, skipping insertion in model container [2023-11-21 20:59:34,369 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:33" (2/3) ... [2023-11-21 20:59:34,371 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5055885c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:59:34, skipping insertion in model container [2023-11-21 20:59:34,371 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:59:34" (3/3) ... [2023-11-21 20:59:34,373 INFO L112 eAbstractionObserver]: Analyzing ICFG mapavg4.i [2023-11-21 20:59:34,401 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 20:59:34,401 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 20:59:34,470 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 20:59:34,479 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;@5251dcf3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 20:59:34,479 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 20:59:34,484 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:59:34,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-21 20:59:34,494 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:59:34,495 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:34,495 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:59:34,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:34,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1831520482, now seen corresponding path program 1 times [2023-11-21 20:59:34,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:34,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561708735] [2023-11-21 20:59:34,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:34,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:34,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:59:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:34,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 20:59:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:34,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 20:59:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 20:59:35,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:35,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561708735] [2023-11-21 20:59:35,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561708735] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:59:35,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964456023] [2023-11-21 20:59:35,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:35,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:59:35,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:59:35,017 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:59:35,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 20:59:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:35,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 20:59:35,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:59:35,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 20:59:35,169 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:59:35,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964456023] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:35,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:59:35,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-21 20:59:35,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194208012] [2023-11-21 20:59:35,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:35,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:59:35,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:35,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:59:35,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:59:35,216 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 20:59:35,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:59:35,277 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-11-21 20:59:35,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:59:35,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2023-11-21 20:59:35,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:59:35,287 INFO L225 Difference]: With dead ends: 33 [2023-11-21 20:59:35,287 INFO L226 Difference]: Without dead ends: 16 [2023-11-21 20:59:35,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:59:35,294 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 20:59:35,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 20:59:35,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-21 20:59:35,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-21 20:59:35,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:59:35,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-11-21 20:59:35,337 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2023-11-21 20:59:35,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:59:35,338 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-11-21 20:59:35,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 20:59:35,338 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-11-21 20:59:35,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 20:59:35,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:59:35,342 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:35,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-21 20:59:35,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-21 20:59:35,553 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:59:35,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:35,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1940105923, now seen corresponding path program 1 times [2023-11-21 20:59:35,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:35,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427235675] [2023-11-21 20:59:35,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:35,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:35,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 20:59:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:35,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 20:59:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:35,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 20:59:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 20:59:35,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:35,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427235675] [2023-11-21 20:59:35,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427235675] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:59:35,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067643863] [2023-11-21 20:59:35,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:35,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:59:35,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:59:35,735 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:59:35,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 20:59:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:35,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 20:59:35,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:59:35,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 20:59:35,839 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:59:35,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067643863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:35,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:59:35,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-11-21 20:59:35,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587429184] [2023-11-21 20:59:35,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:35,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:59:35,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:35,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:59:35,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:59:35,844 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 20:59:35,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:59:35,867 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2023-11-21 20:59:35,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:59:35,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-11-21 20:59:35,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:59:35,869 INFO L225 Difference]: With dead ends: 29 [2023-11-21 20:59:35,869 INFO L226 Difference]: Without dead ends: 17 [2023-11-21 20:59:35,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:59:35,872 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 20:59:35,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 20:59:35,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-21 20:59:35,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-21 20:59:35,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:59:35,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-11-21 20:59:35,879 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2023-11-21 20:59:35,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:59:35,879 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-11-21 20:59:35,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 20:59:35,880 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-11-21 20:59:35,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-21 20:59:35,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:59:35,881 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:35,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 20:59:36,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:59:36,105 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:59:36,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:36,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2121867412, now seen corresponding path program 1 times [2023-11-21 20:59:36,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:36,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447589993] [2023-11-21 20:59:36,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:36,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:36,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 20:59:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:36,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:59:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:36,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 20:59:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:36,315 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 20:59:36,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:36,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447589993] [2023-11-21 20:59:36,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447589993] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:59:36,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362515867] [2023-11-21 20:59:36,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:36,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:59:36,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:59:36,317 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:59:36,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 20:59:36,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:36,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 20:59:36,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:59:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 20:59:36,453 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:59:36,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362515867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:36,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:59:36,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-21 20:59:36,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502963062] [2023-11-21 20:59:36,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:36,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:59:36,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:36,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:59:36,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 20:59:36,456 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 20:59:36,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:59:36,477 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2023-11-21 20:59:36,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:59:36,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-11-21 20:59:36,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:59:36,479 INFO L225 Difference]: With dead ends: 27 [2023-11-21 20:59:36,479 INFO L226 Difference]: Without dead ends: 18 [2023-11-21 20:59:36,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 20:59:36,481 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 20:59:36,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 20:59:36,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-21 20:59:36,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-21 20:59:36,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:59:36,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-11-21 20:59:36,493 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2023-11-21 20:59:36,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:59:36,495 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-11-21 20:59:36,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 20:59:36,495 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-11-21 20:59:36,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-21 20:59:36,496 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:59:36,497 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:36,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 20:59:36,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:59:36,718 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:59:36,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:36,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1765370089, now seen corresponding path program 1 times [2023-11-21 20:59:36,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:36,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917443972] [2023-11-21 20:59:36,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:36,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:36,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 20:59:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:36,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:59:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:36,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-21 20:59:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 20:59:36,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:36,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917443972] [2023-11-21 20:59:36,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917443972] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:59:36,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794999395] [2023-11-21 20:59:36,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:36,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:59:36,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:59:36,877 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:59:36,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 20:59:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:36,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 20:59:36,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:59:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-21 20:59:37,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:59:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-21 20:59:37,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794999395] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:59:37,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 20:59:37,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2023-11-21 20:59:37,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332000427] [2023-11-21 20:59:37,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 20:59:37,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 20:59:37,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:37,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 20:59:37,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-21 20:59:37,071 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 20:59:37,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:59:37,132 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2023-11-21 20:59:37,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 20:59:37,134 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2023-11-21 20:59:37,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:59:37,134 INFO L225 Difference]: With dead ends: 37 [2023-11-21 20:59:37,135 INFO L226 Difference]: Without dead ends: 22 [2023-11-21 20:59:37,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-21 20:59:37,136 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 20:59:37,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 20:59:37,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-21 20:59:37,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-21 20:59:37,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:59:37,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-21 20:59:37,142 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 25 [2023-11-21 20:59:37,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:59:37,142 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-21 20:59:37,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 20:59:37,143 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-21 20:59:37,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-21 20:59:37,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:59:37,144 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:37,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 20:59:37,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:59:37,365 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:59:37,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:37,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1398582133, now seen corresponding path program 2 times [2023-11-21 20:59:37,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:37,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892872761] [2023-11-21 20:59:37,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:37,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:37,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:59:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:37,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 20:59:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:37,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-21 20:59:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-21 20:59:37,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:37,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892872761] [2023-11-21 20:59:37,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892872761] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:59:37,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776366433] [2023-11-21 20:59:37,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 20:59:37,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:59:37,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:59:37,581 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:59:37,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 20:59:37,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 20:59:37,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 20:59:37,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 20:59:37,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:59:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-11-21 20:59:37,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:59:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-11-21 20:59:37,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776366433] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:59:37,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 20:59:37,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2023-11-21 20:59:37,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025020546] [2023-11-21 20:59:37,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 20:59:37,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 20:59:37,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:37,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 20:59:37,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-21 20:59:37,839 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-21 20:59:37,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:59:37,890 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2023-11-21 20:59:37,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 20:59:37,890 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 31 [2023-11-21 20:59:37,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:59:37,891 INFO L225 Difference]: With dead ends: 45 [2023-11-21 20:59:37,892 INFO L226 Difference]: Without dead ends: 29 [2023-11-21 20:59:37,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-21 20:59:37,893 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 20:59:37,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 94 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 20:59:37,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-21 20:59:37,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-21 20:59:37,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:59:37,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-11-21 20:59:37,901 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 31 [2023-11-21 20:59:37,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:59:37,902 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-11-21 20:59:37,902 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-21 20:59:37,902 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-11-21 20:59:37,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-21 20:59:37,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:59:37,904 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:37,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 20:59:38,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:59:38,125 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:59:38,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:38,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1796115458, now seen corresponding path program 3 times [2023-11-21 20:59:38,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:38,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585985862] [2023-11-21 20:59:38,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:38,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:38,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:38,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-21 20:59:38,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:38,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-21 20:59:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:38,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 20:59:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-21 20:59:38,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:38,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585985862] [2023-11-21 20:59:38,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585985862] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:59:38,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157497535] [2023-11-21 20:59:38,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 20:59:38,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:59:38,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:59:38,420 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:59:38,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 20:59:38,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-21 20:59:38,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 20:59:38,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 20:59:38,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:59:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-21 20:59:38,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:59:38,621 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-21 20:59:38,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157497535] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:59:38,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 20:59:38,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-11-21 20:59:38,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828006018] [2023-11-21 20:59:38,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 20:59:38,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-21 20:59:38,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:38,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-21 20:59:38,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-21 20:59:38,625 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 20:59:38,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:59:38,684 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2023-11-21 20:59:38,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-21 20:59:38,685 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2023-11-21 20:59:38,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:59:38,686 INFO L225 Difference]: With dead ends: 51 [2023-11-21 20:59:38,686 INFO L226 Difference]: Without dead ends: 34 [2023-11-21 20:59:38,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-21 20:59:38,688 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 20:59:38,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 20:59:38,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-21 20:59:38,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-11-21 20:59:38,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:59:38,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-11-21 20:59:38,700 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 38 [2023-11-21 20:59:38,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:59:38,705 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-11-21 20:59:38,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 20:59:38,706 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-11-21 20:59:38,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-21 20:59:38,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:59:38,708 INFO L195 NwaCegarLoop]: trace histogram [18, 11, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:38,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 20:59:38,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-21 20:59:38,909 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:59:38,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:38,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1947892003, now seen corresponding path program 4 times [2023-11-21 20:59:38,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:38,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544552598] [2023-11-21 20:59:38,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:38,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:39,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 20:59:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:39,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-21 20:59:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:39,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-21 20:59:39,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:39,349 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2023-11-21 20:59:39,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:39,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544552598] [2023-11-21 20:59:39,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544552598] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:59:39,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482084953] [2023-11-21 20:59:39,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 20:59:39,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:59:39,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:59:39,351 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:59:39,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 20:59:39,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 20:59:39,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 20:59:39,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-21 20:59:39,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:59:39,563 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2023-11-21 20:59:39,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:59:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2023-11-21 20:59:39,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482084953] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:59:39,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 20:59:39,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 27 [2023-11-21 20:59:39,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086490326] [2023-11-21 20:59:39,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 20:59:39,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-21 20:59:39,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:39,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-21 20:59:39,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-11-21 20:59:39,867 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 20:59:39,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:59:39,939 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2023-11-21 20:59:39,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-21 20:59:39,940 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 51 [2023-11-21 20:59:39,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:59:39,941 INFO L225 Difference]: With dead ends: 68 [2023-11-21 20:59:39,941 INFO L226 Difference]: Without dead ends: 47 [2023-11-21 20:59:39,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-11-21 20:59:39,943 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 20:59:39,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 20:59:39,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-21 20:59:39,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-21 20:59:39,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:59:39,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-11-21 20:59:39,952 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 51 [2023-11-21 20:59:39,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:59:39,952 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-11-21 20:59:39,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 20:59:39,953 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-11-21 20:59:39,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-21 20:59:39,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:59:39,955 INFO L195 NwaCegarLoop]: trace histogram [24, 18, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:39,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 20:59:40,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:59:40,170 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:59:40,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:40,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1846981790, now seen corresponding path program 5 times [2023-11-21 20:59:40,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:40,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421666389] [2023-11-21 20:59:40,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:40,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:41,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-21 20:59:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:41,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-21 20:59:41,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:41,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-21 20:59:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2023-11-21 20:59:41,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:41,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421666389] [2023-11-21 20:59:41,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421666389] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:59:41,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089305641] [2023-11-21 20:59:41,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-21 20:59:41,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:59:41,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:59:41,209 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:59:41,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 20:59:42,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-11-21 20:59:42,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 20:59:42,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 20:59:42,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:59:42,266 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 102 proven. 3 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2023-11-21 20:59:42,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:59:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2023-11-21 20:59:42,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089305641] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:59:42,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 20:59:42,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 5, 5] total 33 [2023-11-21 20:59:42,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371675376] [2023-11-21 20:59:42,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 20:59:42,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-21 20:59:42,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:42,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-21 20:59:42,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=678, Unknown=0, NotChecked=0, Total=1056 [2023-11-21 20:59:42,345 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 20:59:42,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:59:42,419 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2023-11-21 20:59:42,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-21 20:59:42,420 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), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2023-11-21 20:59:42,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:59:42,421 INFO L225 Difference]: With dead ends: 73 [2023-11-21 20:59:42,421 INFO L226 Difference]: Without dead ends: 52 [2023-11-21 20:59:42,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=678, Unknown=0, NotChecked=0, Total=1056 [2023-11-21 20:59:42,423 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:59:42,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:59:42,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-21 20:59:42,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-11-21 20:59:42,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:59:42,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2023-11-21 20:59:42,432 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 64 [2023-11-21 20:59:42,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:59:42,433 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2023-11-21 20:59:42,433 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), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 20:59:42,433 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2023-11-21 20:59:42,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-21 20:59:42,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:59:42,435 INFO L195 NwaCegarLoop]: trace histogram [25, 18, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:42,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 20:59:42,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:59:42,657 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:59:42,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:42,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1768999549, now seen corresponding path program 6 times [2023-11-21 20:59:42,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:42,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430435461] [2023-11-21 20:59:42,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:42,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:43,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-21 20:59:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:43,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-21 20:59:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:43,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-21 20:59:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2023-11-21 20:59:43,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:43,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430435461] [2023-11-21 20:59:43,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430435461] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:59:43,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915873383] [2023-11-21 20:59:43,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-21 20:59:43,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:59:43,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:59:43,622 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:59:43,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 20:59:43,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-21 20:59:43,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 20:59:43,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 20:59:43,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:59:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2023-11-21 20:59:44,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:59:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2023-11-21 20:59:44,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915873383] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:59:44,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 20:59:44,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 9, 9] total 42 [2023-11-21 20:59:44,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523609129] [2023-11-21 20:59:44,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 20:59:44,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-21 20:59:44,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:44,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-21 20:59:44,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=497, Invalid=1225, Unknown=0, NotChecked=0, Total=1722 [2023-11-21 20:59:44,257 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 42 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 20:59:44,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:59:44,356 INFO L93 Difference]: Finished difference Result 86 states and 105 transitions. [2023-11-21 20:59:44,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-21 20:59:44,356 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 69 [2023-11-21 20:59:44,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:59:44,360 INFO L225 Difference]: With dead ends: 86 [2023-11-21 20:59:44,360 INFO L226 Difference]: Without dead ends: 61 [2023-11-21 20:59:44,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=497, Invalid=1225, Unknown=0, NotChecked=0, Total=1722 [2023-11-21 20:59:44,367 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:59:44,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:59:44,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-21 20:59:44,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-21 20:59:44,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:59:44,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2023-11-21 20:59:44,385 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 69 [2023-11-21 20:59:44,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:59:44,385 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2023-11-21 20:59:44,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 20:59:44,386 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2023-11-21 20:59:44,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-21 20:59:44,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:59:44,393 INFO L195 NwaCegarLoop]: trace histogram [42, 26, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:44,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-21 20:59:44,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:59:44,621 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:59:44,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:44,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1462577922, now seen corresponding path program 7 times [2023-11-21 20:59:44,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:44,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228728335] [2023-11-21 20:59:44,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:44,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:45,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-21 20:59:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:45,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-21 20:59:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:45,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-11-21 20:59:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1017 trivial. 0 not checked. [2023-11-21 20:59:45,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:45,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228728335] [2023-11-21 20:59:45,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228728335] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:59:45,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975779706] [2023-11-21 20:59:45,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-21 20:59:45,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:59:45,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:59:45,763 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:59:45,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-21 20:59:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:45,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-21 20:59:46,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:59:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1017 trivial. 0 not checked. [2023-11-21 20:59:46,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:59:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1017 trivial. 0 not checked. [2023-11-21 20:59:47,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975779706] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:59:47,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 20:59:47,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 29] total 57 [2023-11-21 20:59:47,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580838121] [2023-11-21 20:59:47,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 20:59:47,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-21 20:59:47,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:47,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-21 20:59:47,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2023-11-21 20:59:47,302 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 20:59:47,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:59:47,411 INFO L93 Difference]: Finished difference Result 122 states and 157 transitions. [2023-11-21 20:59:47,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-21 20:59:47,412 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 94 [2023-11-21 20:59:47,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:59:47,413 INFO L225 Difference]: With dead ends: 122 [2023-11-21 20:59:47,414 INFO L226 Difference]: Without dead ends: 89 [2023-11-21 20:59:47,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2023-11-21 20:59:47,417 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:59:47,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 108 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:59:47,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-21 20:59:47,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-11-21 20:59:47,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:59:47,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2023-11-21 20:59:47,428 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 94 [2023-11-21 20:59:47,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:59:47,429 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2023-11-21 20:59:47,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 20:59:47,429 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2023-11-21 20:59:47,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-21 20:59:47,431 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:59:47,431 INFO L195 NwaCegarLoop]: trace histogram [54, 42, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:47,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-21 20:59:47,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-21 20:59:47,652 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:59:47,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:47,652 INFO L85 PathProgramCache]: Analyzing trace with hash 259624382, now seen corresponding path program 8 times [2023-11-21 20:59:47,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:47,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998909752] [2023-11-21 20:59:47,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:47,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:50,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-21 20:59:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:50,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-21 20:59:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:50,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-11-21 20:59:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2502 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 1017 trivial. 0 not checked. [2023-11-21 20:59:50,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:50,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998909752] [2023-11-21 20:59:50,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998909752] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:59:50,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226697654] [2023-11-21 20:59:50,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 20:59:50,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:59:50,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:59:50,848 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:59:50,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-21 20:59:51,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 20:59:51,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 20:59:51,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-21 20:59:51,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:59:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2502 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 1017 trivial. 0 not checked. [2023-11-21 20:59:51,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:59:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2502 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 1017 trivial. 0 not checked. [2023-11-21 20:59:55,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226697654] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:59:55,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 20:59:55,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 57] total 113 [2023-11-21 20:59:55,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364807444] [2023-11-21 20:59:55,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 20:59:55,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2023-11-21 20:59:55,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:55,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2023-11-21 20:59:55,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2023-11-21 20:59:55,575 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 113 states, 113 states have (on average 1.1238938053097345) internal successors, (127), 113 states have internal predecessors, (127), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 20:59:55,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:59:55,820 INFO L93 Difference]: Finished difference Result 178 states and 241 transitions. [2023-11-21 20:59:55,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-11-21 20:59:55,821 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.1238938053097345) internal successors, (127), 113 states have internal predecessors, (127), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 122 [2023-11-21 20:59:55,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:59:55,823 INFO L225 Difference]: With dead ends: 178 [2023-11-21 20:59:55,823 INFO L226 Difference]: Without dead ends: 145 [2023-11-21 20:59:55,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2023-11-21 20:59:55,828 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:59:55,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:59:55,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-21 20:59:55,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-11-21 20:59:55,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:59:55,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 149 transitions. [2023-11-21 20:59:55,842 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 149 transitions. Word has length 122 [2023-11-21 20:59:55,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:59:55,843 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 149 transitions. [2023-11-21 20:59:55,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.1238938053097345) internal successors, (127), 113 states have internal predecessors, (127), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 20:59:55,843 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 149 transitions. [2023-11-21 20:59:55,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-11-21 20:59:55,845 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:59:55,845 INFO L195 NwaCegarLoop]: trace histogram [110, 42, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:55,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-21 20:59:56,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-21 20:59:56,061 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:59:56,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:56,061 INFO L85 PathProgramCache]: Analyzing trace with hash -613605570, now seen corresponding path program 9 times [2023-11-21 20:59:56,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:56,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066942374] [2023-11-21 20:59:56,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:56,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:06,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-21 21:00:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:06,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2023-11-21 21:00:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:06,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2023-11-21 21:00:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7122 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 1017 trivial. 0 not checked. [2023-11-21 21:00:06,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:06,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066942374] [2023-11-21 21:00:06,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066942374] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:00:06,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076830399] [2023-11-21 21:00:06,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 21:00:06,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:06,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:06,077 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:06,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-21 21:00:06,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-21 21:00:06,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 21:00:06,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 21:00:06,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7122 backedges. 454 proven. 21 refuted. 0 times theorem prover too weak. 6647 trivial. 0 not checked. [2023-11-21 21:00:06,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:00:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7122 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7101 trivial. 0 not checked. [2023-11-21 21:00:07,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076830399] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:00:07,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:00:07,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 9, 9] total 127 [2023-11-21 21:00:07,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153490229] [2023-11-21 21:00:07,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:00:07,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2023-11-21 21:00:07,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:07,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2023-11-21 21:00:07,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6447, Invalid=9555, Unknown=0, NotChecked=0, Total=16002 [2023-11-21 21:00:07,299 INFO L87 Difference]: Start difference. First operand 145 states and 149 transitions. Second operand has 127 states, 127 states have (on average 1.141732283464567) internal successors, (145), 127 states have internal predecessors, (145), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 21:00:07,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:07,546 INFO L93 Difference]: Finished difference Result 187 states and 203 transitions. [2023-11-21 21:00:07,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2023-11-21 21:00:07,547 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.141732283464567) internal successors, (145), 127 states have internal predecessors, (145), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 178 [2023-11-21 21:00:07,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:07,551 INFO L225 Difference]: With dead ends: 187 [2023-11-21 21:00:07,551 INFO L226 Difference]: Without dead ends: 154 [2023-11-21 21:00:07,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=6447, Invalid=9555, Unknown=0, NotChecked=0, Total=16002 [2023-11-21 21:00:07,557 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:07,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 117 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 21:00:07,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-21 21:00:07,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2023-11-21 21:00:07,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0201342281879195) internal successors, (152), 149 states have internal predecessors, (152), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:07,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2023-11-21 21:00:07,576 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 178 [2023-11-21 21:00:07,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:07,577 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2023-11-21 21:00:07,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.141732283464567) internal successors, (145), 127 states have internal predecessors, (145), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 21:00:07,578 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2023-11-21 21:00:07,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-11-21 21:00:07,580 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:07,581 INFO L195 NwaCegarLoop]: trace histogram [111, 42, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:07,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-21 21:00:07,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-21 21:00:07,797 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:07,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:07,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1669838243, now seen corresponding path program 10 times [2023-11-21 21:00:07,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:07,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502456631] [2023-11-21 21:00:07,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:07,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:08,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:17,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2023-11-21 21:00:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:17,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2023-11-21 21:00:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:17,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2023-11-21 21:00:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7317 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 1101 trivial. 0 not checked. [2023-11-21 21:00:17,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:17,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502456631] [2023-11-21 21:00:17,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502456631] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:00:17,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660825573] [2023-11-21 21:00:17,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 21:00:17,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:17,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:17,161 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:17,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66954cf7-dd3a-430a-95b8-2d6226243f01/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-21 21:00:17,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 21:00:17,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 21:00:17,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 1427 conjuncts, 113 conjunts are in the unsatisfiable core [2023-11-21 21:00:17,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7317 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 1101 trivial. 0 not checked. [2023-11-21 21:00:17,953 INFO L327 TraceCheckSpWp]: Computing backward predicates...