./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label55.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_6a902961-46f5-4d02-8d0c-878ae82e45a4/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a902961-46f5-4d02-8d0c-878ae82e45a4/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_6a902961-46f5-4d02-8d0c-878ae82e45a4/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a902961-46f5-4d02-8d0c-878ae82e45a4/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label55.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a902961-46f5-4d02-8d0c-878ae82e45a4/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_6a902961-46f5-4d02-8d0c-878ae82e45a4/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 e6db237e0e3a7433c307944ca0a7f57b3986dfc7d27b25cb31c2bd3c24bb8b17 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:04:23,842 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:04:23,979 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a902961-46f5-4d02-8d0c-878ae82e45a4/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 12:04:23,987 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:04:23,988 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:04:24,027 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:04:24,028 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:04:24,029 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:04:24,030 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:04:24,031 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:04:24,031 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:04:24,032 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:04:24,033 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:04:24,033 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:04:24,034 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:04:24,034 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:04:24,040 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:04:24,041 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:04:24,041 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:04:24,043 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:04:24,043 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:04:24,044 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:04:24,044 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:04:24,044 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:04:24,045 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:04:24,045 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:04:24,046 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:04:24,046 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:04:24,047 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:04:24,047 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:04:24,048 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:04:24,049 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:04:24,049 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:04:24,049 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:04:24,049 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:04:24,050 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:04:24,050 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:04:24,050 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:04:24,050 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:04:24,050 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:04:24,051 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:04:24,051 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:04:24,051 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_6a902961-46f5-4d02-8d0c-878ae82e45a4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a902961-46f5-4d02-8d0c-878ae82e45a4/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6db237e0e3a7433c307944ca0a7f57b3986dfc7d27b25cb31c2bd3c24bb8b17 [2023-11-26 12:04:24,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:04:24,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:04:24,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:04:24,460 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:04:24,460 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:04:24,461 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a902961-46f5-4d02-8d0c-878ae82e45a4/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/eca-rers2012/Problem13_label55.c [2023-11-26 12:04:27,578 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:04:28,134 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:04:28,136 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a902961-46f5-4d02-8d0c-878ae82e45a4/sv-benchmarks/c/eca-rers2012/Problem13_label55.c [2023-11-26 12:04:28,184 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a902961-46f5-4d02-8d0c-878ae82e45a4/bin/uautomizer-verify-VRDe98Ueme/data/04a8ef411/08fb41a8c345445db7de9c88aa14bf33/FLAGc75a125f8 [2023-11-26 12:04:28,202 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a902961-46f5-4d02-8d0c-878ae82e45a4/bin/uautomizer-verify-VRDe98Ueme/data/04a8ef411/08fb41a8c345445db7de9c88aa14bf33 [2023-11-26 12:04:28,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:04:28,210 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:04:28,212 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:04:28,213 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:04:28,218 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:04:28,219 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:04:28" (1/1) ... [2023-11-26 12:04:28,220 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@173b77ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:28, skipping insertion in model container [2023-11-26 12:04:28,220 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:04:28" (1/1) ... [2023-11-26 12:04:28,393 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:04:28,749 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_6a902961-46f5-4d02-8d0c-878ae82e45a4/sv-benchmarks/c/eca-rers2012/Problem13_label55.c[6865,6878] [2023-11-26 12:04:30,027 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:04:30,039 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:04:30,070 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_6a902961-46f5-4d02-8d0c-878ae82e45a4/sv-benchmarks/c/eca-rers2012/Problem13_label55.c[6865,6878] [2023-11-26 12:04:30,866 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:04:30,897 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:04:30,897 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:30 WrapperNode [2023-11-26 12:04:30,898 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:04:30,899 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:04:30,899 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:04:30,899 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:04:30,907 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:30" (1/1) ... [2023-11-26 12:04:30,987 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:30" (1/1) ... [2023-11-26 12:04:31,729 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5584 [2023-11-26 12:04:31,744 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:04:31,745 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:04:31,745 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:04:31,745 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:04:31,763 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:30" (1/1) ... [2023-11-26 12:04:31,763 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:30" (1/1) ... [2023-11-26 12:04:31,893 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:30" (1/1) ... [2023-11-26 12:04:32,224 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 12:04:32,236 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:30" (1/1) ... [2023-11-26 12:04:32,236 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:30" (1/1) ... [2023-11-26 12:04:32,635 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:30" (1/1) ... [2023-11-26 12:04:32,682 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:30" (1/1) ... [2023-11-26 12:04:32,710 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:30" (1/1) ... [2023-11-26 12:04:32,732 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:30" (1/1) ... [2023-11-26 12:04:32,816 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:04:32,818 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:04:32,818 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:04:32,819 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:04:32,820 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:30" (1/1) ... [2023-11-26 12:04:32,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:04:32,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a902961-46f5-4d02-8d0c-878ae82e45a4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:32,854 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a902961-46f5-4d02-8d0c-878ae82e45a4/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:04:32,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a902961-46f5-4d02-8d0c-878ae82e45a4/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:04:32,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:04:32,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:04:32,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:04:32,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:04:32,993 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:04:32,996 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:04:39,961 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:04:40,033 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:04:40,033 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 12:04:40,035 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:04:40 BoogieIcfgContainer [2023-11-26 12:04:40,035 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:04:40,038 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:04:40,038 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:04:40,041 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:04:40,042 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:04:28" (1/3) ... [2023-11-26 12:04:40,042 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f6accb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:04:40, skipping insertion in model container [2023-11-26 12:04:40,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:30" (2/3) ... [2023-11-26 12:04:40,043 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f6accb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:04:40, skipping insertion in model container [2023-11-26 12:04:40,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:04:40" (3/3) ... [2023-11-26 12:04:40,044 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label55.c [2023-11-26 12:04:40,065 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:04:40,065 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 12:04:40,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:04:40,146 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;@28d34023, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:04:40,146 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 12:04:40,155 INFO L276 IsEmpty]: Start isEmpty. Operand has 1036 states, 1034 states have (on average 1.877176015473888) internal successors, (1941), 1035 states have internal predecessors, (1941), 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 12:04:40,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-26 12:04:40,163 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:04:40,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:40,165 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:04:40,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:40,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1464167840, now seen corresponding path program 1 times [2023-11-26 12:04:40,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:40,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529848973] [2023-11-26 12:04:40,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:40,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:40,358 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 12:04:40,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:40,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529848973] [2023-11-26 12:04:40,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529848973] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:40,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:40,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:04:40,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504007992] [2023-11-26 12:04:40,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:40,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 12:04:40,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:40,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 12:04:40,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 12:04:40,412 INFO L87 Difference]: Start difference. First operand has 1036 states, 1034 states have (on average 1.877176015473888) internal successors, (1941), 1035 states have internal predecessors, (1941), 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 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:40,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:04:40,560 INFO L93 Difference]: Finished difference Result 2071 states and 3881 transitions. [2023-11-26 12:04:40,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 12:04:40,562 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-11-26 12:04:40,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:04:40,584 INFO L225 Difference]: With dead ends: 2071 [2023-11-26 12:04:40,585 INFO L226 Difference]: Without dead ends: 1034 [2023-11-26 12:04:40,593 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 12:04:40,597 INFO L413 NwaCegarLoop]: 1876 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1876 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:04:40,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1876 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:04:40,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2023-11-26 12:04:40,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1034. [2023-11-26 12:04:40,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 1.8160696999031947) internal successors, (1876), 1033 states have internal predecessors, (1876), 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 12:04:40,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1876 transitions. [2023-11-26 12:04:40,703 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1876 transitions. Word has length 47 [2023-11-26 12:04:40,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:04:40,703 INFO L495 AbstractCegarLoop]: Abstraction has 1034 states and 1876 transitions. [2023-11-26 12:04:40,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:40,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1876 transitions. [2023-11-26 12:04:40,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-26 12:04:40,716 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:04:40,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:40,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 12:04:40,717 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:04:40,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:40,717 INFO L85 PathProgramCache]: Analyzing trace with hash -2034068517, now seen corresponding path program 1 times [2023-11-26 12:04:40,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:40,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514537976] [2023-11-26 12:04:40,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:40,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:41,074 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 12:04:41,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:41,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514537976] [2023-11-26 12:04:41,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514537976] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:41,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:41,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:04:41,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774859673] [2023-11-26 12:04:41,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:41,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:04:41,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:41,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:04:41,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:04:41,083 INFO L87 Difference]: Start difference. First operand 1034 states and 1876 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:47,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:04:47,893 INFO L93 Difference]: Finished difference Result 3015 states and 5510 transitions. [2023-11-26 12:04:47,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:04:47,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-11-26 12:04:47,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:04:47,915 INFO L225 Difference]: With dead ends: 3015 [2023-11-26 12:04:47,915 INFO L226 Difference]: Without dead ends: 1982 [2023-11-26 12:04:47,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 12:04:47,920 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 1007 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 2956 mSolverCounterSat, 929 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1007 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 3885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 929 IncrementalHoareTripleChecker+Valid, 2956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-11-26 12:04:47,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1007 Valid, 317 Invalid, 3885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [929 Valid, 2956 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-11-26 12:04:47,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1982 states. [2023-11-26 12:04:48,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1982 to 1929. [2023-11-26 12:04:48,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1928 states have (on average 1.7977178423236515) internal successors, (3466), 1928 states have internal predecessors, (3466), 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 12:04:48,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 3466 transitions. [2023-11-26 12:04:48,019 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 3466 transitions. Word has length 47 [2023-11-26 12:04:48,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:04:48,020 INFO L495 AbstractCegarLoop]: Abstraction has 1929 states and 3466 transitions. [2023-11-26 12:04:48,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:48,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 3466 transitions. [2023-11-26 12:04:48,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-26 12:04:48,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:04:48,033 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:48,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 12:04:48,034 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:04:48,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:48,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1877706833, now seen corresponding path program 1 times [2023-11-26 12:04:48,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:48,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427736051] [2023-11-26 12:04:48,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:48,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:48,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:48,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427736051] [2023-11-26 12:04:48,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427736051] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:48,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:48,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:04:48,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815861408] [2023-11-26 12:04:48,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:48,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:04:48,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:48,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:04:48,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:04:48,482 INFO L87 Difference]: Start difference. First operand 1929 states and 3466 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:53,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:04:53,736 INFO L93 Difference]: Finished difference Result 5455 states and 9916 transitions. [2023-11-26 12:04:53,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:04:53,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2023-11-26 12:04:53,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:04:53,760 INFO L225 Difference]: With dead ends: 5455 [2023-11-26 12:04:53,760 INFO L226 Difference]: Without dead ends: 3527 [2023-11-26 12:04:53,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 12:04:53,768 INFO L413 NwaCegarLoop]: 853 mSDtfsCounter, 923 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2310 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 3188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 2310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:04:53,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 1005 Invalid, 3188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 2310 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-11-26 12:04:53,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3527 states. [2023-11-26 12:04:53,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3527 to 3525. [2023-11-26 12:04:53,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3525 states, 3524 states have (on average 1.5672531214528944) internal successors, (5523), 3524 states have internal predecessors, (5523), 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 12:04:53,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3525 states to 3525 states and 5523 transitions. [2023-11-26 12:04:53,875 INFO L78 Accepts]: Start accepts. Automaton has 3525 states and 5523 transitions. Word has length 112 [2023-11-26 12:04:53,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:04:53,879 INFO L495 AbstractCegarLoop]: Abstraction has 3525 states and 5523 transitions. [2023-11-26 12:04:53,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:53,879 INFO L276 IsEmpty]: Start isEmpty. Operand 3525 states and 5523 transitions. [2023-11-26 12:04:53,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-26 12:04:53,889 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:04:53,889 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:53,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 12:04:53,890 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:04:53,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:53,891 INFO L85 PathProgramCache]: Analyzing trace with hash -2015873118, now seen corresponding path program 1 times [2023-11-26 12:04:53,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:53,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450138816] [2023-11-26 12:04:53,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:53,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:54,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:54,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450138816] [2023-11-26 12:04:54,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450138816] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:54,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:54,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:04:54,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188715873] [2023-11-26 12:04:54,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:54,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:04:54,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:54,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:04:54,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:04:54,101 INFO L87 Difference]: Start difference. First operand 3525 states and 5523 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 2 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:58,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:04:58,900 INFO L93 Difference]: Finished difference Result 10233 states and 16097 transitions. [2023-11-26 12:04:58,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:04:58,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 2 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2023-11-26 12:04:58,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:04:58,938 INFO L225 Difference]: With dead ends: 10233 [2023-11-26 12:04:58,938 INFO L226 Difference]: Without dead ends: 6709 [2023-11-26 12:04:58,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 12:04:58,945 INFO L413 NwaCegarLoop]: 716 mSDtfsCounter, 973 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2536 mSolverCounterSat, 774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 3310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 774 IncrementalHoareTripleChecker+Valid, 2536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-11-26 12:04:58,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [973 Valid, 850 Invalid, 3310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [774 Valid, 2536 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-11-26 12:04:58,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6709 states. [2023-11-26 12:04:59,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6709 to 6699. [2023-11-26 12:04:59,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6699 states, 6698 states have (on average 1.4131083905643476) internal successors, (9465), 6698 states have internal predecessors, (9465), 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 12:04:59,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6699 states to 6699 states and 9465 transitions. [2023-11-26 12:04:59,101 INFO L78 Accepts]: Start accepts. Automaton has 6699 states and 9465 transitions. Word has length 118 [2023-11-26 12:04:59,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:04:59,103 INFO L495 AbstractCegarLoop]: Abstraction has 6699 states and 9465 transitions. [2023-11-26 12:04:59,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 2 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:59,104 INFO L276 IsEmpty]: Start isEmpty. Operand 6699 states and 9465 transitions. [2023-11-26 12:04:59,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-26 12:04:59,110 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:04:59,110 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:59,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 12:04:59,110 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:04:59,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:59,112 INFO L85 PathProgramCache]: Analyzing trace with hash 429147191, now seen corresponding path program 1 times [2023-11-26 12:04:59,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:59,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496276579] [2023-11-26 12:04:59,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:59,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:59,363 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:59,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:59,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496276579] [2023-11-26 12:04:59,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496276579] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:59,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:59,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:04:59,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407054857] [2023-11-26 12:04:59,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:59,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:04:59,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:59,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:04:59,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:04:59,370 INFO L87 Difference]: Start difference. First operand 6699 states and 9465 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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 12:05:05,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:05,070 INFO L93 Difference]: Finished difference Result 17442 states and 24478 transitions. [2023-11-26 12:05:05,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:05:05,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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 148 [2023-11-26 12:05:05,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:05,129 INFO L225 Difference]: With dead ends: 17442 [2023-11-26 12:05:05,129 INFO L226 Difference]: Without dead ends: 10744 [2023-11-26 12:05:05,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 12:05:05,140 INFO L413 NwaCegarLoop]: 832 mSDtfsCounter, 844 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 3292 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 3742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 3292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:05,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 963 Invalid, 3742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 3292 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-11-26 12:05:05,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10744 states. [2023-11-26 12:05:05,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10744 to 10668. [2023-11-26 12:05:05,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10668 states, 10667 states have (on average 1.3563326146057935) internal successors, (14468), 10667 states have internal predecessors, (14468), 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 12:05:05,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10668 states to 10668 states and 14468 transitions. [2023-11-26 12:05:05,412 INFO L78 Accepts]: Start accepts. Automaton has 10668 states and 14468 transitions. Word has length 148 [2023-11-26 12:05:05,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:05,414 INFO L495 AbstractCegarLoop]: Abstraction has 10668 states and 14468 transitions. [2023-11-26 12:05:05,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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 12:05:05,415 INFO L276 IsEmpty]: Start isEmpty. Operand 10668 states and 14468 transitions. [2023-11-26 12:05:05,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-26 12:05:05,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:05,419 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:05,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 12:05:05,419 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:05:05,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:05,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1896667842, now seen corresponding path program 1 times [2023-11-26 12:05:05,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:05,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875219869] [2023-11-26 12:05:05,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:05,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:05,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:06,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:06,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875219869] [2023-11-26 12:05:06,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875219869] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:06,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:05:06,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:05:06,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727335252] [2023-11-26 12:05:06,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:06,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:05:06,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:06,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:05:06,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:05:06,097 INFO L87 Difference]: Start difference. First operand 10668 states and 14468 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 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 12:05:10,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:10,476 INFO L93 Difference]: Finished difference Result 20548 states and 28118 transitions. [2023-11-26 12:05:10,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:05:10,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 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 158 [2023-11-26 12:05:10,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:10,518 INFO L225 Difference]: With dead ends: 20548 [2023-11-26 12:05:10,518 INFO L226 Difference]: Without dead ends: 10668 [2023-11-26 12:05:10,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 12:05:10,532 INFO L413 NwaCegarLoop]: 1081 mSDtfsCounter, 678 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2521 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 2545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:10,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 1210 Invalid, 2545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2521 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-26 12:05:10,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10668 states. [2023-11-26 12:05:10,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10668 to 10668. [2023-11-26 12:05:10,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10668 states, 10667 states have (on average 1.3539889378456924) internal successors, (14443), 10667 states have internal predecessors, (14443), 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 12:05:10,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10668 states to 10668 states and 14443 transitions. [2023-11-26 12:05:10,778 INFO L78 Accepts]: Start accepts. Automaton has 10668 states and 14443 transitions. Word has length 158 [2023-11-26 12:05:10,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:10,779 INFO L495 AbstractCegarLoop]: Abstraction has 10668 states and 14443 transitions. [2023-11-26 12:05:10,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 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 12:05:10,780 INFO L276 IsEmpty]: Start isEmpty. Operand 10668 states and 14443 transitions. [2023-11-26 12:05:10,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-26 12:05:10,783 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:10,783 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:10,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 12:05:10,784 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:05:10,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:10,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1981715756, now seen corresponding path program 1 times [2023-11-26 12:05:10,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:10,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614363915] [2023-11-26 12:05:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:10,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:10,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:11,738 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:11,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:11,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614363915] [2023-11-26 12:05:11,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614363915] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:11,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163808597] [2023-11-26 12:05:11,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:11,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:11,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a902961-46f5-4d02-8d0c-878ae82e45a4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:11,748 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a902961-46f5-4d02-8d0c-878ae82e45a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:11,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a902961-46f5-4d02-8d0c-878ae82e45a4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:05:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:11,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 12:05:11,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:12,277 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-26 12:05:12,277 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:05:12,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163808597] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:12,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:05:12,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-26 12:05:12,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740578589] [2023-11-26 12:05:12,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:12,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:05:12,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:12,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:05:12,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:05:12,282 INFO L87 Difference]: Start difference. First operand 10668 states and 14443 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 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)