./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/pr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme --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 5922a5be589e27d89439744489152c928c7510f0140c8b0fb4d1faadee969752 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:48:00,480 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:48:00,604 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:48:00,615 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:48:00,616 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:48:00,657 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:48:00,659 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:48:00,660 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:48:00,661 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:48:00,666 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:48:00,667 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:48:00,668 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:48:00,668 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:48:00,670 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:48:00,671 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:48:00,671 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:48:00,672 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:48:00,672 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:48:00,673 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:48:00,673 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:48:00,674 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:48:00,674 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:48:00,675 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:48:00,675 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:48:00,676 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:48:00,676 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:48:00,676 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:48:00,677 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:48:00,678 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:48:00,678 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:48:00,680 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:48:00,680 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:48:00,680 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:48:00,681 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:48:00,681 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:48:00,681 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:48:00,681 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:48:00,681 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:48:00,682 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:48:00,682 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:48:00,682 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:48:00,683 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:48:00,683 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_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5922a5be589e27d89439744489152c928c7510f0140c8b0fb4d1faadee969752 [2023-11-26 10:48:00,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:48:01,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:48:01,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:48:01,027 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:48:01,028 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:48:01,030 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/array-tiling/pr2.c [2023-11-26 10:48:04,136 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:48:04,469 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:48:04,470 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/sv-benchmarks/c/array-tiling/pr2.c [2023-11-26 10:48:04,479 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/data/ed67c280f/70da772e08704a05b63f80ee445601ff/FLAG31b35ead9 [2023-11-26 10:48:04,496 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/data/ed67c280f/70da772e08704a05b63f80ee445601ff [2023-11-26 10:48:04,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:48:04,503 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:48:04,506 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:48:04,507 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:48:04,513 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:48:04,514 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:48:04" (1/1) ... [2023-11-26 10:48:04,515 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b704838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:04, skipping insertion in model container [2023-11-26 10:48:04,515 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:48:04" (1/1) ... [2023-11-26 10:48:04,540 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:48:04,726 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_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/sv-benchmarks/c/array-tiling/pr2.c[394,407] [2023-11-26 10:48:04,745 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:48:04,755 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:48:04,769 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_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/sv-benchmarks/c/array-tiling/pr2.c[394,407] [2023-11-26 10:48:04,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:48:04,794 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:48:04,795 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:04 WrapperNode [2023-11-26 10:48:04,795 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:48:04,796 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:48:04,796 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:48:04,796 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:48:04,804 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:04" (1/1) ... [2023-11-26 10:48:04,812 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:04" (1/1) ... [2023-11-26 10:48:04,843 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2023-11-26 10:48:04,843 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:48:04,844 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:48:04,844 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:48:04,844 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:48:04,857 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:04" (1/1) ... [2023-11-26 10:48:04,857 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:04" (1/1) ... [2023-11-26 10:48:04,859 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:04" (1/1) ... [2023-11-26 10:48:04,873 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 6, 6]. 43 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 0, 6]. The 4 writes are split as follows [0, 4, 0]. [2023-11-26 10:48:04,873 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:04" (1/1) ... [2023-11-26 10:48:04,873 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:04" (1/1) ... [2023-11-26 10:48:04,880 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:04" (1/1) ... [2023-11-26 10:48:04,884 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:04" (1/1) ... [2023-11-26 10:48:04,886 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:04" (1/1) ... [2023-11-26 10:48:04,887 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:04" (1/1) ... [2023-11-26 10:48:04,889 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:48:04,890 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:48:04,891 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:48:04,891 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:48:04,892 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:04" (1/1) ... [2023-11-26 10:48:04,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:48:04,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:04,938 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:48:04,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:48:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:48:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:48:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:48:04,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:48:04,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:48:04,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:48:04,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:48:04,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:48:04,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:48:04,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:48:04,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:48:04,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:48:04,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:48:04,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:48:05,115 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:48:05,117 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:48:05,324 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:48:05,350 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:48:05,359 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 10:48:05,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:48:05 BoogieIcfgContainer [2023-11-26 10:48:05,361 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:48:05,363 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:48:05,365 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:48:05,368 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:48:05,369 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:48:04" (1/3) ... [2023-11-26 10:48:05,371 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b068889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:48:05, skipping insertion in model container [2023-11-26 10:48:05,371 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:04" (2/3) ... [2023-11-26 10:48:05,373 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b068889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:48:05, skipping insertion in model container [2023-11-26 10:48:05,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:48:05" (3/3) ... [2023-11-26 10:48:05,375 INFO L112 eAbstractionObserver]: Analyzing ICFG pr2.c [2023-11-26 10:48:05,396 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:48:05,397 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:48:05,448 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:48:05,456 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;@10c0bb0e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:48:05,456 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:48:05,460 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:05,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-26 10:48:05,467 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:05,468 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:05,469 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:05,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:05,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1365372683, now seen corresponding path program 1 times [2023-11-26 10:48:05,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:05,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726488469] [2023-11-26 10:48:05,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:05,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:05,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:05,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726488469] [2023-11-26 10:48:05,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726488469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:05,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:05,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:48:05,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966520571] [2023-11-26 10:48:05,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:05,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:48:05,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:05,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:48:05,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:48:05,707 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:05,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:05,732 INFO L93 Difference]: Finished difference Result 38 states and 55 transitions. [2023-11-26 10:48:05,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:48:05,735 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-26 10:48:05,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:05,743 INFO L225 Difference]: With dead ends: 38 [2023-11-26 10:48:05,743 INFO L226 Difference]: Without dead ends: 17 [2023-11-26 10:48:05,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:48:05,750 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:05,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:48:05,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-26 10:48:05,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-26 10:48:05,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:05,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-11-26 10:48:05,813 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2023-11-26 10:48:05,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:05,814 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-11-26 10:48:05,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:05,814 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-11-26 10:48:05,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-26 10:48:05,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:05,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:05,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:48:05,819 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:05,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:05,821 INFO L85 PathProgramCache]: Analyzing trace with hash 2045431053, now seen corresponding path program 1 times [2023-11-26 10:48:05,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:05,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826500716] [2023-11-26 10:48:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:05,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:06,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:06,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826500716] [2023-11-26 10:48:06,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826500716] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:06,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:06,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:48:06,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473620906] [2023-11-26 10:48:06,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:06,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:48:06,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:06,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:48:06,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:48:06,109 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:06,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:06,148 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2023-11-26 10:48:06,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:48:06,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-26 10:48:06,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:06,149 INFO L225 Difference]: With dead ends: 22 [2023-11-26 10:48:06,150 INFO L226 Difference]: Without dead ends: 20 [2023-11-26 10:48:06,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:48:06,152 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:06,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 48 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:48:06,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-26 10:48:06,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2023-11-26 10:48:06,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:06,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-11-26 10:48:06,157 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2023-11-26 10:48:06,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:06,158 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-11-26 10:48:06,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:06,158 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-11-26 10:48:06,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-26 10:48:06,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:06,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:06,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:48:06,159 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:06,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:06,160 INFO L85 PathProgramCache]: Analyzing trace with hash 2045490635, now seen corresponding path program 1 times [2023-11-26 10:48:06,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:06,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862986702] [2023-11-26 10:48:06,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:06,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:06,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:06,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862986702] [2023-11-26 10:48:06,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862986702] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:06,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:06,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:48:06,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127790010] [2023-11-26 10:48:06,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:06,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:48:06,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:06,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:48:06,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:48:06,495 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:06,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:06,569 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2023-11-26 10:48:06,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:48:06,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-26 10:48:06,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:06,573 INFO L225 Difference]: With dead ends: 33 [2023-11-26 10:48:06,574 INFO L226 Difference]: Without dead ends: 23 [2023-11-26 10:48:06,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:48:06,580 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 49 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:06,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 16 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:48:06,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-26 10:48:06,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2023-11-26 10:48:06,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:06,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-11-26 10:48:06,590 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2023-11-26 10:48:06,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:06,590 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-11-26 10:48:06,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:06,591 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-11-26 10:48:06,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-26 10:48:06,591 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:06,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:06,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:48:06,592 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:06,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:06,593 INFO L85 PathProgramCache]: Analyzing trace with hash 199609668, now seen corresponding path program 1 times [2023-11-26 10:48:06,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:06,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64897251] [2023-11-26 10:48:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:06,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:06,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:07,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:07,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:07,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64897251] [2023-11-26 10:48:07,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64897251] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:07,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627382407] [2023-11-26 10:48:07,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:07,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:07,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:07,248 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:07,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:48:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:07,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:48:07,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:07,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:48:07,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 10:48:07,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-26 10:48:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:07,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:07,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-26 10:48:07,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-26 10:48:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:07,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627382407] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:07,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:07,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 18 [2023-11-26 10:48:07,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47197840] [2023-11-26 10:48:07,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:07,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 10:48:07,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:07,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 10:48:07,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-11-26 10:48:07,680 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:08,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:08,267 INFO L93 Difference]: Finished difference Result 102 states and 125 transitions. [2023-11-26 10:48:08,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-26 10:48:08,267 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-26 10:48:08,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:08,271 INFO L225 Difference]: With dead ends: 102 [2023-11-26 10:48:08,271 INFO L226 Difference]: Without dead ends: 88 [2023-11-26 10:48:08,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=275, Invalid=847, Unknown=0, NotChecked=0, Total=1122 [2023-11-26 10:48:08,278 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 197 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:08,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 90 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:48:08,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-26 10:48:08,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 33. [2023-11-26 10:48:08,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:08,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-11-26 10:48:08,292 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 16 [2023-11-26 10:48:08,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:08,293 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-11-26 10:48:08,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:08,294 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-11-26 10:48:08,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-26 10:48:08,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:08,295 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:08,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:08,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-26 10:48:08,502 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:08,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:08,502 INFO L85 PathProgramCache]: Analyzing trace with hash -193417342, now seen corresponding path program 1 times [2023-11-26 10:48:08,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:08,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124151993] [2023-11-26 10:48:08,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:08,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:08,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:08,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:08,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124151993] [2023-11-26 10:48:08,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124151993] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:08,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:08,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:48:08,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455423976] [2023-11-26 10:48:08,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:08,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:48:08,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:08,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:48:08,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:48:08,582 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:08,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:08,628 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2023-11-26 10:48:08,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:48:08,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-26 10:48:08,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:08,629 INFO L225 Difference]: With dead ends: 56 [2023-11-26 10:48:08,629 INFO L226 Difference]: Without dead ends: 42 [2023-11-26 10:48:08,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:48:08,631 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:08,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:48:08,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-26 10:48:08,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2023-11-26 10:48:08,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:08,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-11-26 10:48:08,657 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 16 [2023-11-26 10:48:08,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:08,658 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-11-26 10:48:08,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:08,659 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-11-26 10:48:08,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-26 10:48:08,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:08,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:08,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:48:08,665 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:08,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:08,669 INFO L85 PathProgramCache]: Analyzing trace with hash 486641028, now seen corresponding path program 1 times [2023-11-26 10:48:08,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:08,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740857229] [2023-11-26 10:48:08,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:08,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:08,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:08,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:08,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:08,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740857229] [2023-11-26 10:48:08,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740857229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:08,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509432038] [2023-11-26 10:48:08,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:08,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:08,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:08,952 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:08,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:48:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:09,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-26 10:48:09,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:09,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:48:09,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 10:48:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:09,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:09,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-26 10:48:09,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-26 10:48:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:09,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509432038] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:09,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:09,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 14 [2023-11-26 10:48:09,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568112678] [2023-11-26 10:48:09,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:09,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:48:09,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:09,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:48:09,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:48:09,231 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:09,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:09,596 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2023-11-26 10:48:09,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-26 10:48:09,597 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-26 10:48:09,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:09,598 INFO L225 Difference]: With dead ends: 72 [2023-11-26 10:48:09,598 INFO L226 Difference]: Without dead ends: 70 [2023-11-26 10:48:09,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2023-11-26 10:48:09,600 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 97 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:09,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 93 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:48:09,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-26 10:48:09,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 40. [2023-11-26 10:48:09,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:09,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2023-11-26 10:48:09,614 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 16 [2023-11-26 10:48:09,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:09,615 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2023-11-26 10:48:09,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:09,615 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2023-11-26 10:48:09,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-26 10:48:09,616 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:09,616 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:09,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:09,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 10:48:09,823 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:09,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:09,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1237798271, now seen corresponding path program 1 times [2023-11-26 10:48:09,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:09,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501628356] [2023-11-26 10:48:09,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:09,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:09,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:09,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:09,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501628356] [2023-11-26 10:48:09,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501628356] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:09,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:09,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:48:09,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643888205] [2023-11-26 10:48:09,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:09,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:48:09,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:09,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:48:09,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:48:09,865 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:09,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:09,890 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2023-11-26 10:48:09,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:48:09,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-26 10:48:09,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:09,893 INFO L225 Difference]: With dead ends: 58 [2023-11-26 10:48:09,893 INFO L226 Difference]: Without dead ends: 44 [2023-11-26 10:48:09,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:48:09,895 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:09,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 31 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:48:09,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-26 10:48:09,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2023-11-26 10:48:09,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:09,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2023-11-26 10:48:09,907 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 20 [2023-11-26 10:48:09,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:09,907 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2023-11-26 10:48:09,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:09,908 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2023-11-26 10:48:09,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-26 10:48:09,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:09,910 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:09,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 10:48:09,910 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:09,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:09,911 INFO L85 PathProgramCache]: Analyzing trace with hash -470241182, now seen corresponding path program 1 times [2023-11-26 10:48:09,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:09,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951653362] [2023-11-26 10:48:09,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:09,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:10,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:10,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951653362] [2023-11-26 10:48:10,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951653362] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:10,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518266504] [2023-11-26 10:48:10,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:10,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:10,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:10,230 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:10,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:48:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:10,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:48:10,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:10,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:48:10,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-26 10:48:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:10,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:10,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-26 10:48:10,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2023-11-26 10:48:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:10,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518266504] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:10,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:10,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-26 10:48:10,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620783136] [2023-11-26 10:48:10,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:10,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 10:48:10,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:10,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 10:48:10,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-26 10:48:10,608 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:10,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:10,858 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2023-11-26 10:48:10,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:48:10,858 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-26 10:48:10,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:10,861 INFO L225 Difference]: With dead ends: 72 [2023-11-26 10:48:10,861 INFO L226 Difference]: Without dead ends: 63 [2023-11-26 10:48:10,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2023-11-26 10:48:10,863 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 83 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:10,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 79 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:48:10,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-26 10:48:10,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2023-11-26 10:48:10,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:10,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2023-11-26 10:48:10,881 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 21 [2023-11-26 10:48:10,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:10,882 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2023-11-26 10:48:10,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:10,882 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2023-11-26 10:48:10,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-26 10:48:10,885 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:10,885 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:10,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-26 10:48:11,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 10:48:11,091 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:11,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:11,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1481358432, now seen corresponding path program 1 times [2023-11-26 10:48:11,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:11,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231677689] [2023-11-26 10:48:11,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:11,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:11,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:11,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:11,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231677689] [2023-11-26 10:48:11,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231677689] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:11,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812960677] [2023-11-26 10:48:11,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:11,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:11,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:11,365 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:11,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:48:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:11,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 10:48:11,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:11,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:48:11,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:11,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:11,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-26 10:48:11,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-26 10:48:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:11,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812960677] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:11,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:11,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2023-11-26 10:48:11,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897651711] [2023-11-26 10:48:11,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:11,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:48:11,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:11,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:48:11,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:48:11,638 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:11,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:11,957 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2023-11-26 10:48:11,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 10:48:11,958 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-26 10:48:11,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:11,959 INFO L225 Difference]: With dead ends: 78 [2023-11-26 10:48:11,959 INFO L226 Difference]: Without dead ends: 76 [2023-11-26 10:48:11,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2023-11-26 10:48:11,961 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:11,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 104 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:48:11,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-26 10:48:11,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 53. [2023-11-26 10:48:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 52 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:11,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2023-11-26 10:48:11,974 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 21 [2023-11-26 10:48:11,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:11,974 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2023-11-26 10:48:11,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:11,975 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2023-11-26 10:48:11,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 10:48:11,976 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:11,976 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:11,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-26 10:48:12,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:12,182 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:12,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:12,183 INFO L85 PathProgramCache]: Analyzing trace with hash -2076003001, now seen corresponding path program 1 times [2023-11-26 10:48:12,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:12,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197232768] [2023-11-26 10:48:12,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:12,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:12,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 10:48:12,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:12,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197232768] [2023-11-26 10:48:12,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197232768] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:12,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:12,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:48:12,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322834991] [2023-11-26 10:48:12,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:12,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:48:12,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:12,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:48:12,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:48:12,216 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:12,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:12,242 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2023-11-26 10:48:12,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:48:12,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-26 10:48:12,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:12,243 INFO L225 Difference]: With dead ends: 74 [2023-11-26 10:48:12,243 INFO L226 Difference]: Without dead ends: 58 [2023-11-26 10:48:12,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:48:12,244 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 41 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 [2023-11-26 10:48:12,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 41 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:48:12,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-26 10:48:12,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2023-11-26 10:48:12,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:12,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2023-11-26 10:48:12,255 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 25 [2023-11-26 10:48:12,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:12,255 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2023-11-26 10:48:12,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:12,255 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2023-11-26 10:48:12,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 10:48:12,256 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:12,257 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:12,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 10:48:12,257 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:12,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:12,257 INFO L85 PathProgramCache]: Analyzing trace with hash -697495548, now seen corresponding path program 2 times [2023-11-26 10:48:12,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:12,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425432757] [2023-11-26 10:48:12,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:12,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:12,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:12,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425432757] [2023-11-26 10:48:12,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425432757] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:12,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366121456] [2023-11-26 10:48:12,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:48:12,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:12,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:12,621 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:12,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:48:12,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:48:12,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:48:12,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 10:48:12,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:13,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:13,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366121456] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:13,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:13,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2023-11-26 10:48:13,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683095458] [2023-11-26 10:48:13,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:13,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 10:48:13,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:13,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 10:48:13,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2023-11-26 10:48:13,189 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:13,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:13,428 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2023-11-26 10:48:13,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:48:13,429 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-26 10:48:13,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:13,430 INFO L225 Difference]: With dead ends: 99 [2023-11-26 10:48:13,430 INFO L226 Difference]: Without dead ends: 67 [2023-11-26 10:48:13,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2023-11-26 10:48:13,431 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 157 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:13,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 67 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:48:13,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-26 10:48:13,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2023-11-26 10:48:13,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2023-11-26 10:48:13,443 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 26 [2023-11-26 10:48:13,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:13,444 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2023-11-26 10:48:13,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:13,444 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2023-11-26 10:48:13,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-26 10:48:13,445 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:13,445 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:13,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:13,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:13,651 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:13,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:13,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1708646467, now seen corresponding path program 3 times [2023-11-26 10:48:13,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:13,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070556145] [2023-11-26 10:48:13,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:13,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:13,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:14,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:14,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070556145] [2023-11-26 10:48:14,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070556145] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:14,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886362021] [2023-11-26 10:48:14,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:48:14,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:14,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:14,100 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:14,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:48:14,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 10:48:14,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:48:14,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-26 10:48:14,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:14,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-26 10:48:14,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-26 10:48:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:14,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:14,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2023-11-26 10:48:14,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-26 10:48:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:15,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886362021] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:15,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:15,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 30 [2023-11-26 10:48:15,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775584434] [2023-11-26 10:48:15,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:15,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-26 10:48:15,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:15,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-26 10:48:15,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2023-11-26 10:48:15,043 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:16,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:16,474 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2023-11-26 10:48:16,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-26 10:48:16,475 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-26 10:48:16,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:16,476 INFO L225 Difference]: With dead ends: 133 [2023-11-26 10:48:16,476 INFO L226 Difference]: Without dead ends: 124 [2023-11-26 10:48:16,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=460, Invalid=2296, Unknown=0, NotChecked=0, Total=2756 [2023-11-26 10:48:16,478 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 243 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:16,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 209 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:48:16,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-26 10:48:16,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 70. [2023-11-26 10:48:16,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.144927536231884) internal successors, (79), 69 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:16,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2023-11-26 10:48:16,494 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 30 [2023-11-26 10:48:16,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:16,494 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2023-11-26 10:48:16,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:16,495 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2023-11-26 10:48:16,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-26 10:48:16,496 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:16,496 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:16,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-26 10:48:16,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 10:48:16,701 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:16,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:16,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1859723203, now seen corresponding path program 1 times [2023-11-26 10:48:16,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:16,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953140798] [2023-11-26 10:48:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:16,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:17,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:17,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953140798] [2023-11-26 10:48:17,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953140798] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:17,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536533851] [2023-11-26 10:48:17,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:17,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:17,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:17,034 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:17,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:48:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:17,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-26 10:48:17,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:17,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:48:17,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 10:48:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:17,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:17,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-26 10:48:17,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-26 10:48:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:17,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536533851] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:17,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:17,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 24 [2023-11-26 10:48:17,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702973119] [2023-11-26 10:48:17,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:17,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 10:48:17,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:17,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 10:48:17,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2023-11-26 10:48:17,655 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:18,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:18,457 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2023-11-26 10:48:18,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-26 10:48:18,457 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-26 10:48:18,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:18,458 INFO L225 Difference]: With dead ends: 119 [2023-11-26 10:48:18,458 INFO L226 Difference]: Without dead ends: 117 [2023-11-26 10:48:18,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=1567, Unknown=0, NotChecked=0, Total=1892 [2023-11-26 10:48:18,460 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 114 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:18,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 140 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:48:18,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-26 10:48:18,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2023-11-26 10:48:18,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 74 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:18,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2023-11-26 10:48:18,476 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 30 [2023-11-26 10:48:18,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:18,477 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2023-11-26 10:48:18,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:18,477 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2023-11-26 10:48:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-26 10:48:18,478 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:18,478 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:18,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:18,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 10:48:18,684 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:18,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:18,684 INFO L85 PathProgramCache]: Analyzing trace with hash -2072433147, now seen corresponding path program 2 times [2023-11-26 10:48:18,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:18,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577513913] [2023-11-26 10:48:18,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:18,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:19,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:19,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577513913] [2023-11-26 10:48:19,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577513913] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:19,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266057169] [2023-11-26 10:48:19,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:48:19,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:19,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:19,105 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:19,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:48:19,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:48:19,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:48:19,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-26 10:48:19,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:19,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:48:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:19,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:19,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-26 10:48:19,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-26 10:48:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:19,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266057169] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:19,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:19,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 20 [2023-11-26 10:48:19,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427820217] [2023-11-26 10:48:19,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:19,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 10:48:19,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:19,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 10:48:19,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-11-26 10:48:19,548 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:20,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:20,506 INFO L93 Difference]: Finished difference Result 147 states and 164 transitions. [2023-11-26 10:48:20,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-26 10:48:20,507 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-26 10:48:20,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:20,508 INFO L225 Difference]: With dead ends: 147 [2023-11-26 10:48:20,509 INFO L226 Difference]: Without dead ends: 145 [2023-11-26 10:48:20,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=348, Invalid=1722, Unknown=0, NotChecked=0, Total=2070 [2023-11-26 10:48:20,511 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 77 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:20,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 151 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:48:20,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-26 10:48:20,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 85. [2023-11-26 10:48:20,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 84 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:20,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2023-11-26 10:48:20,547 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 35 [2023-11-26 10:48:20,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:20,548 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2023-11-26 10:48:20,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:20,548 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2023-11-26 10:48:20,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 10:48:20,549 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:20,549 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:20,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:20,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 10:48:20,755 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:20,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:20,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1685496003, now seen corresponding path program 4 times [2023-11-26 10:48:20,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:20,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070327044] [2023-11-26 10:48:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:20,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:21,361 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 30 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:21,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:21,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070327044] [2023-11-26 10:48:21,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070327044] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:21,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708276038] [2023-11-26 10:48:21,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:48:21,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:21,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:21,364 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:21,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:48:21,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:48:21,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:48:21,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 10:48:21,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:22,104 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 46 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:22,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 46 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:22,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708276038] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:22,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:22,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2023-11-26 10:48:22,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962534323] [2023-11-26 10:48:22,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:22,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-26 10:48:22,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:22,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-26 10:48:22,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2023-11-26 10:48:22,452 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:23,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:23,121 INFO L93 Difference]: Finished difference Result 168 states and 188 transitions. [2023-11-26 10:48:23,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 10:48:23,122 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-26 10:48:23,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:23,123 INFO L225 Difference]: With dead ends: 168 [2023-11-26 10:48:23,124 INFO L226 Difference]: Without dead ends: 106 [2023-11-26 10:48:23,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=488, Invalid=1492, Unknown=0, NotChecked=0, Total=1980 [2023-11-26 10:48:23,127 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 211 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:23,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 159 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:48:23,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-26 10:48:23,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2023-11-26 10:48:23,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.125) internal successors, (108), 96 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:23,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2023-11-26 10:48:23,172 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 40 [2023-11-26 10:48:23,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:23,172 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2023-11-26 10:48:23,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:23,173 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2023-11-26 10:48:23,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-26 10:48:23,174 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:23,174 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:23,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:23,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 10:48:23,378 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:23,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:23,378 INFO L85 PathProgramCache]: Analyzing trace with hash -2033322186, now seen corresponding path program 5 times [2023-11-26 10:48:23,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:23,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476769136] [2023-11-26 10:48:23,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:23,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:23,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:24,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:24,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476769136] [2023-11-26 10:48:24,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476769136] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:24,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751783913] [2023-11-26 10:48:24,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 10:48:24,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:24,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:24,120 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:24,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:48:24,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-26 10:48:24,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:48:24,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-26 10:48:24,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:24,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:48:24,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-26 10:48:24,609 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:24,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-26 10:48:24,792 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:24,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 38 [2023-11-26 10:48:24,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:24,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 48 [2023-11-26 10:48:25,987 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:25,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 22 [2023-11-26 10:48:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:26,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:26,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 91 [2023-11-26 10:48:26,974 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:26,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 582 treesize of output 534 [2023-11-26 10:48:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:27,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751783913] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:27,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:27,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 19] total 48 [2023-11-26 10:48:27,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316423375] [2023-11-26 10:48:27,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:27,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-26 10:48:27,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:27,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-26 10:48:27,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2042, Unknown=0, NotChecked=0, Total=2256 [2023-11-26 10:48:27,131 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:37,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:37,211 INFO L93 Difference]: Finished difference Result 270 states and 298 transitions. [2023-11-26 10:48:37,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-11-26 10:48:37,212 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-11-26 10:48:37,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:37,214 INFO L225 Difference]: With dead ends: 270 [2023-11-26 10:48:37,214 INFO L226 Difference]: Without dead ends: 261 [2023-11-26 10:48:37,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3317 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1947, Invalid=11163, Unknown=0, NotChecked=0, Total=13110 [2023-11-26 10:48:37,221 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 754 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:37,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 403 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 1510 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-26 10:48:37,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-11-26 10:48:37,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 142. [2023-11-26 10:48:37,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.127659574468085) internal successors, (159), 141 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:37,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 159 transitions. [2023-11-26 10:48:37,253 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 159 transitions. Word has length 44 [2023-11-26 10:48:37,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:37,254 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 159 transitions. [2023-11-26 10:48:37,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:37,254 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 159 transitions. [2023-11-26 10:48:37,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-26 10:48:37,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:37,256 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:37,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:37,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 10:48:37,462 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:37,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:37,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1748917570, now seen corresponding path program 3 times [2023-11-26 10:48:37,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:37,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254585002] [2023-11-26 10:48:37,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:37,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:38,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:38,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254585002] [2023-11-26 10:48:38,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254585002] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:38,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447913762] [2023-11-26 10:48:38,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:48:38,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:38,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:38,093 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:38,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 10:48:38,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-26 10:48:38,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:48:38,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-26 10:48:38,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:38,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:48:38,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 10:48:38,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-26 10:48:38,476 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:38,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-11-26 10:48:38,556 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:38,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 25 [2023-11-26 10:48:38,616 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:38,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 28 [2023-11-26 10:48:39,326 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:39,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2023-11-26 10:48:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:39,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:40,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2023-11-26 10:48:40,128 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:40,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 488 treesize of output 440 [2023-11-26 10:48:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:40,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447913762] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:40,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:40,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 16] total 43 [2023-11-26 10:48:40,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24964119] [2023-11-26 10:48:40,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:40,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-26 10:48:40,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:40,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-26 10:48:40,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2023-11-26 10:48:40,221 INFO L87 Difference]: Start difference. First operand 142 states and 159 transitions. Second operand has 43 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:43,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:43,569 INFO L93 Difference]: Finished difference Result 234 states and 257 transitions. [2023-11-26 10:48:43,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-26 10:48:43,570 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-11-26 10:48:43,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:43,572 INFO L225 Difference]: With dead ends: 234 [2023-11-26 10:48:43,572 INFO L226 Difference]: Without dead ends: 225 [2023-11-26 10:48:43,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=874, Invalid=5288, Unknown=0, NotChecked=0, Total=6162 [2023-11-26 10:48:43,575 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 411 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:43,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 277 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-26 10:48:43,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-11-26 10:48:43,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 121. [2023-11-26 10:48:43,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.125) internal successors, (135), 120 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:43,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2023-11-26 10:48:43,611 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 44 [2023-11-26 10:48:43,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:43,612 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2023-11-26 10:48:43,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:43,612 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2023-11-26 10:48:43,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-26 10:48:43,613 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:43,613 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:43,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-26 10:48:43,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 10:48:43,826 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:43,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:43,827 INFO L85 PathProgramCache]: Analyzing trace with hash 984283126, now seen corresponding path program 2 times [2023-11-26 10:48:43,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:43,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778458368] [2023-11-26 10:48:43,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:43,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:44,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:44,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778458368] [2023-11-26 10:48:44,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778458368] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:44,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877025031] [2023-11-26 10:48:44,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:48:44,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:44,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:44,349 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:44,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 10:48:44,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:48:44,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:48:44,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-26 10:48:44,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:44,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:48:44,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 10:48:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:45,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:45,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-26 10:48:45,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-26 10:48:45,293 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:45,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877025031] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:45,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:45,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 30 [2023-11-26 10:48:45,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054797409] [2023-11-26 10:48:45,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:45,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-26 10:48:45,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:45,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-26 10:48:45,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2023-11-26 10:48:45,298 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:46,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:46,759 INFO L93 Difference]: Finished difference Result 191 states and 212 transitions. [2023-11-26 10:48:46,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-26 10:48:46,759 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-11-26 10:48:46,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:46,760 INFO L225 Difference]: With dead ends: 191 [2023-11-26 10:48:46,760 INFO L226 Difference]: Without dead ends: 189 [2023-11-26 10:48:46,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=545, Invalid=3745, Unknown=0, NotChecked=0, Total=4290 [2023-11-26 10:48:46,764 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 98 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:46,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 202 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1034 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 10:48:46,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-26 10:48:46,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 126. [2023-11-26 10:48:46,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.128) internal successors, (141), 125 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:46,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 141 transitions. [2023-11-26 10:48:46,799 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 141 transitions. Word has length 44 [2023-11-26 10:48:46,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:46,799 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 141 transitions. [2023-11-26 10:48:46,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:46,800 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 141 transitions. [2023-11-26 10:48:46,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-26 10:48:46,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:46,801 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:46,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:47,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 10:48:47,007 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:47,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:47,007 INFO L85 PathProgramCache]: Analyzing trace with hash -647620246, now seen corresponding path program 4 times [2023-11-26 10:48:47,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:47,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365008572] [2023-11-26 10:48:47,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:47,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:47,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:47,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365008572] [2023-11-26 10:48:47,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365008572] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:47,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384054606] [2023-11-26 10:48:47,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:48:47,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:47,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:47,524 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:47,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 10:48:47,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:48:47,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:48:47,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-26 10:48:47,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:47,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-26 10:48:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:47,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:48,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-26 10:48:48,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-26 10:48:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:48,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384054606] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:48,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:48,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 25 [2023-11-26 10:48:48,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048472587] [2023-11-26 10:48:48,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:48,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 10:48:48,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:48,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 10:48:48,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2023-11-26 10:48:48,150 INFO L87 Difference]: Start difference. First operand 126 states and 141 transitions. Second operand has 25 states, 25 states have (on average 3.4) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:50,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:50,600 INFO L93 Difference]: Finished difference Result 261 states and 292 transitions. [2023-11-26 10:48:50,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-26 10:48:50,601 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-26 10:48:50,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:50,603 INFO L225 Difference]: With dead ends: 261 [2023-11-26 10:48:50,603 INFO L226 Difference]: Without dead ends: 259 [2023-11-26 10:48:50,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2327 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=710, Invalid=6600, Unknown=0, NotChecked=0, Total=7310 [2023-11-26 10:48:50,607 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 100 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 1746 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:50,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 303 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1746 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-26 10:48:50,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-11-26 10:48:50,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 136. [2023-11-26 10:48:50,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.125925925925926) internal successors, (152), 135 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:50,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 152 transitions. [2023-11-26 10:48:50,639 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 152 transitions. Word has length 49 [2023-11-26 10:48:50,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:50,639 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 152 transitions. [2023-11-26 10:48:50,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:50,639 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 152 transitions. [2023-11-26 10:48:50,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-26 10:48:50,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:50,640 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:50,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-26 10:48:50,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:50,841 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:50,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:50,841 INFO L85 PathProgramCache]: Analyzing trace with hash 807859062, now seen corresponding path program 6 times [2023-11-26 10:48:50,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:50,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317481355] [2023-11-26 10:48:50,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:50,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 73 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:51,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:51,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317481355] [2023-11-26 10:48:51,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317481355] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:51,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927656270] [2023-11-26 10:48:51,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 10:48:51,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:51,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:51,569 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:51,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb12b47-0bc3-4d9a-85b9-e290716f8f09/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 10:48:51,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-26 10:48:51,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:48:51,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-26 10:48:51,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:51,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-26 10:48:52,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2023-11-26 10:48:52,311 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-11-26 10:48:52,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 43